Class StringGroovyMethods

java.lang.Object
org.codehaus.groovy.runtime.DefaultGroovyMethodsSupport
org.codehaus.groovy.runtime.StringGroovyMethods

public class StringGroovyMethods extends DefaultGroovyMethodsSupport
This class defines new groovy methods which appear on String-related JDK classes (String, CharSequence, Matcher) inside the Groovy environment. Static methods are used with the first parameter being the destination class, e.g. public static String reverse(String self) provides a reverse() method for String.

NOTE: While this class contains many 'public' static methods, it is primarily regarded as an internal class (its internal package name suggests this also). We value backwards compatibility of these methods when used within Groovy but value less backwards compatibility at the Java method call level. I.e. future versions of Groovy may remove or move a method call in this file but would normally aim to keep the method available from within Groovy.

  • Constructor Details

    • StringGroovyMethods

      public StringGroovyMethods()
  • Method Details

    • asBoolean

      public static boolean asBoolean(CharSequence string)
      Coerce a string (an instance of CharSequence) to a boolean value. A string is coerced to false if it is of length 0, and to true otherwise.
      Parameters:
      string - the character sequence
      Returns:
      the boolean value
      Since:
      1.7.0
    • asBoolean

      public static boolean asBoolean(Matcher matcher)
      Coerce a Matcher instance to a boolean value.
      Parameters:
      matcher - the matcher
      Returns:
      the boolean value
      Since:
      1.7.0
    • asType

      public static <T> T asType(CharSequence self, Class<T> c)

      Provides a method to perform custom 'dynamic' type conversion to the given class using the as operator.

      Parameters:
      self - a CharSequence
      c - the desired class
      Returns:
      the converted object
      Since:
      1.8.2
      See Also:
    • asType

      public static <T> T asType(GString self, Class<T> c)
      Converts the GString to a File, or delegates to the default DefaultGroovyMethods.asType(Object, Class)
      Parameters:
      self - a GString
      c - the desired class
      Returns:
      the converted object
      Since:
      1.5.0
    • asType

      public static <T> T asType(String self, Class<T> c)
      Provides a method to perform custom 'dynamic' type conversion to the given class using the as operator. Example: '123' as Double

      By default, the following types are supported:

      • List
      • BigDecimal
      • BigInteger
      • Long
      • Integer
      • Short
      • Byte
      • Character
      • Double
      • Float
      • File
      • Subclasses of Enum
      If any other type is given, the call is delegated to DefaultGroovyMethods.asType(Object, Class).
      Parameters:
      self - a String
      c - the desired class
      Returns:
      the converted object
      Since:
      1.0
    • bitwiseNegate

      public static Pattern bitwiseNegate(CharSequence self)
      Turns a CharSequence into a regular expression Pattern
      Parameters:
      self - a String to convert into a regular expression
      Returns:
      the regular expression pattern
      Since:
      1.8.2
    • bitwiseNegate

      @Deprecated public static Pattern bitwiseNegate(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • uncapitalize

      public static String uncapitalize(CharSequence self)
      Convenience method to uncapitalize the first letter of a CharSequence (typically the first letter of a word). Example usage:
       assert 'H'.uncapitalize() == 'h'
       assert 'Hello'.uncapitalize() == 'hello'
       assert 'Hello world'.uncapitalize() == 'hello world'
       assert 'Hello World'.uncapitalize() == 'hello World'
       assert 'hello world' ==
           'Hello World'.split(' ').collect{ it.uncapitalize() }.join(' ')
       
      Parameters:
      self - The CharSequence to uncapitalize
      Returns:
      A String containing the uncapitalized toString() of the CharSequence
      Since:
      2.4.8
    • capitalize

      public static String capitalize(CharSequence self)
      Convenience method to capitalize the first letter of a CharSequence (typically the first letter of a word). Example usage:
       assert 'h'.capitalize() == 'H'
       assert 'hello'.capitalize() == 'Hello'
       assert 'hello world'.capitalize() == 'Hello world'
       assert 'Hello World' ==
           'hello world'.split(' ').collect{ it.capitalize() }.join(' ')
       
      Parameters:
      self - The CharSequence to capitalize
      Returns:
      A String containing the capitalized toString() of the CharSequence
      Since:
      1.8.2
      See Also:
    • capitalize

      @Deprecated public static String capitalize(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • center

      public static String center(CharSequence self, Number numberOfChars)
      Pad a CharSequence to a minimum length specified by numberOfChars by adding the space character around it as many times as needed so that it remains centered. If the String is already the same size or bigger than the target numberOfChars, then the original String is returned. An example:
       ['A', 'BB', 'CCC', 'DDDD'].each{ println '|' + it.center(6) + '|' }
       
      will produce output like:
       |  A   |
       |  BB  |
       | CCC  |
       | DDDD |
       
      Parameters:
      self - a CharSequence object
      numberOfChars - the total minimum number of characters of the result
      Returns:
      the centered toString() of this CharSequence with padded characters around it
      Since:
      1.8.2
      See Also:
    • center

      public static String center(CharSequence self, Number numberOfChars, CharSequence padding)
      Pad a CharSequence to a minimum length specified by numberOfChars, appending the supplied padding CharSequence around the original as many times as needed keeping it centered. If the String is already the same size or bigger than the target numberOfChars, then the original String is returned. An example:
       ['A', 'BB', 'CCC', 'DDDD'].each{ println '|' + it.center(6, '+') + '|' }
       
      will produce output like:
       |++A+++|
       |++BB++|
       |+CCC++|
       |+DDDD+|
       
      Parameters:
      self - a CharSequence object
      numberOfChars - the total minimum number of characters of the resulting CharSequence
      padding - the characters used for padding
      Returns:
      the centered toString() of this CharSequence with padded characters around it
      Since:
      1.8.2
      See Also:
    • center

      @Deprecated public static String center(String self, Number numberOfChars)
      Deprecated.
      Use the CharSequence version
      See Also:
    • center

      @Deprecated public static String center(String self, Number numberOfChars, String padding)
      Deprecated.
      Use the CharSequence version
      See Also:
    • contains

      public static boolean contains(CharSequence self, CharSequence text)
      Provide an implementation of contains() like Collection.contains(Object) to make CharSequences more polymorphic.
      Parameters:
      self - a CharSequence
      text - the CharSequence to look for
      Returns:
      true if this CharSequence contains the given text
      Since:
      1.8.2
      See Also:
    • contains

      @Deprecated public static boolean contains(String self, String text)
      Deprecated.
      Use the CharSequence version
      See Also:
    • count

      public static int count(CharSequence self, CharSequence text)
      Count the number of occurrences of a sub CharSequence.
      Parameters:
      self - a CharSequence
      text - a sub CharSequence
      Returns:
      the number of occurrences of the given CharSequence inside this CharSequence
      Since:
      1.8.2
      See Also:
    • count

      @Deprecated public static int count(String self, String text)
      Deprecated.
      Use the CharSequence version
      See Also:
    • denormalize

      public static String denormalize(CharSequence self)
      Return a CharSequence with lines (separated by LF, CR/LF, or CR) terminated by the platform specific line separator.
      Parameters:
      self - a CharSequence object
      Returns:
      the denormalized toString() of this CharSequence
      Since:
      1.8.2
      See Also:
    • denormalize

      @Deprecated public static String denormalize(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • drop

      public static CharSequence drop(CharSequence self, int num)
      Drops the given number of chars from the head of this CharSequence if they are available.
           def text = "Groovy"
           assert text.drop( 0 ) == 'Groovy'
           assert text.drop( 2 ) == 'oovy'
           assert text.drop( 7 ) == ''
       
      Parameters:
      self - the original CharSequence
      num - the number of characters to drop from this iterator
      Returns:
      a CharSequence consisting of all characters except the first num ones, or else an empty String, if this CharSequence has less than num characters.
      Since:
      1.8.1
    • drop

      public static String drop(GString self, int num)
      A GString variant of the equivalent CharSequence method.
      Parameters:
      self - the original GString
      num - the number of characters to drop from this iterator
      Returns:
      a String consisting of all characters except the first num ones, or else an empty String, if the toString() of this GString has less than num characters.
      Since:
      2.3.7
      See Also:
    • dropWhile

      public static CharSequence dropWhile(CharSequence self, Closure condition)
      Create a suffix of the given CharSequence by dropping as many characters as possible from the front of the original CharSequence such that calling the given closure condition evaluates to true when passed each of the dropped characters.

       def text = "Groovy"
       assert text.dropWhile{ false } == 'Groovy'
       assert text.dropWhile{ true } == ''
       assert text.dropWhile{ it < 'Z' } == 'roovy'
       assert text.dropWhile{ it != 'v' } == 'vy'
       
      Parameters:
      self - the original CharSequence
      condition - the closure that while continuously evaluating to true will cause us to drop elements from the front of the original CharSequence
      Returns:
      the shortest suffix of the given CharSequence such that the given closure condition evaluates to true for each element dropped from the front of the CharSequence
      Since:
      2.0.0
    • dropWhile

      public static String dropWhile(GString self, Closure condition)
      A GString variant of the equivalent CharSequence method.
      Parameters:
      self - the original GString
      condition - the closure that while continuously evaluating to true will cause us to drop elements from the front of the original GString
      Returns:
      the shortest suffix of the given GString such that the given closure condition evaluates to true for each element dropped from the front of the CharSequence
      Since:
      2.3.7
      See Also:
    • eachLine

      public static <T> T eachLine(CharSequence self, Closure<T> closure) throws IOException
      Iterates through this CharSequence line by line. Each line is passed to the given 1 or 2 arg closure. If a 2 arg closure is found the line count is passed as the second argument.
      Parameters:
      self - a CharSequence
      closure - a closure
      Returns:
      the last value returned by the closure
      Throws:
      IOException - if an error occurs
      Since:
      1.8.2
      See Also:
    • eachLine

      public static <T> T eachLine(CharSequence self, int firstLine, Closure<T> closure) throws IOException
      Iterates through this CharSequence line by line. Each line is passed to the given 1 or 2 arg closure. If a 2 arg closure is found the line count is passed as the second argument.
      Parameters:
      self - a CharSequence
      firstLine - the line number value used for the first line (default is 1, set to 0 to start counting from 0)
      closure - a closure (arg 1 is line, optional arg 2 is line number)
      Returns:
      the last value returned by the closure
      Throws:
      IOException - if an error occurs
      Since:
      1.8.2
    • eachLine

      @Deprecated public static <T> T eachLine(String self, Closure<T> closure) throws IOException
      Deprecated.
      Use the CharSequence version
      Throws:
      IOException
      See Also:
    • eachLine

      @Deprecated public static <T> T eachLine(String self, int firstLine, Closure<T> closure) throws IOException
      Deprecated.
      Use the CharSequence version
      Throws:
      IOException
      See Also:
    • collectReplacements

      public static String collectReplacements(String orig, Closure<String> transform)
      Iterate through this String a character at a time collecting either the original character or a transformed replacement String. The transform Closure should return null to indicate that no transformation is required for the given character.

       assert "Groovy".collectReplacements{ it == 'o' ? '_O_' : null } == 'Gr_O__O_vy'
       assert "B&W".collectReplacements{ it == '&' ? '&' : null } == 'B&W'
       
      Parameters:
      orig - the original String
      Returns:
      A new string in which all characters that require escaping have been replaced with the corresponding replacements as determined by the transform Closure.
    • eachMatch

      public static <T extends CharSequence> T eachMatch(T self, CharSequence regex, Closure closure)
      Process each regex group matched substring of the given CharSequence. If the closure parameter takes one argument, an array with all match groups is passed to it. If the closure takes as many arguments as there are match groups, then each parameter will be one match group.
      Parameters:
      self - the source CharSequence
      regex - a Regex CharSequence
      closure - a closure with one parameter or as much parameters as groups
      Returns:
      the source CharSequence
      Since:
      1.8.2
      See Also:
    • eachMatch

      public static <T extends CharSequence> T eachMatch(T self, Pattern pattern, Closure closure)
      Process each regex group matched substring of the given pattern. If the closure parameter takes one argument, an array with all match groups is passed to it. If the closure takes as many arguments as there are match groups, then each parameter will be one match group.
      Parameters:
      self - the source CharSequence
      pattern - a regex Pattern
      closure - a closure with one parameter or as much parameters as groups
      Returns:
      the source CharSequence
      Since:
      1.8.2
      See Also:
    • eachMatch

      public static String eachMatch(String self, Pattern pattern, Closure closure)
      Process each regex group matched substring of the given pattern. If the closure parameter takes one argument, an array with all match groups is passed to it. If the closure takes as many arguments as there are match groups, then each parameter will be one match group.
      Parameters:
      self - the source string
      pattern - a regex Pattern
      closure - a closure with one parameter or as much parameters as groups
      Returns:
      the source string
      Since:
      1.6.1
    • eachMatch

      public static String eachMatch(String self, String regex, Closure closure)
      Process each regex group matched substring of the given string. If the closure parameter takes one argument, an array with all match groups is passed to it. If the closure takes as many arguments as there are match groups, then each parameter will be one match group.
      Parameters:
      self - the source string
      regex - a Regex string
      closure - a closure with one parameter or as much parameters as groups
      Returns:
      the source string
      Since:
      1.6.0
    • expand

      public static String expand(CharSequence self)
      Expands all tabs into spaces with tabStops of size 8.
      Parameters:
      self - A CharSequence to expand
      Returns:
      The expanded toString() of this CharSequence
      Since:
      1.8.2
      See Also:
    • expand

      public static String expand(CharSequence self, int tabStop)
      Expands all tabs into spaces. If the CharSequence has multiple lines, expand each line - restarting tab stops at the start of each line.
      Parameters:
      self - A CharSequence to expand
      tabStop - The number of spaces a tab represents
      Returns:
      The expanded toString() of this CharSequence
      Since:
      1.8.2
      See Also:
    • expand

      @Deprecated public static String expand(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • expand

      @Deprecated public static String expand(String self, int tabStop)
      Deprecated.
      Use the CharSequence version
      See Also:
    • expandLine

      public static String expandLine(CharSequence self, int tabStop)
      Expands all tabs into spaces. Assumes the CharSequence represents a single line of text.
      Parameters:
      self - A line to expand
      tabStop - The number of spaces a tab represents
      Returns:
      The expanded toString() of this CharSequence
      Since:
      1.8.2
      See Also:
    • expandLine

      @Deprecated public static String expandLine(String self, int tabStop)
      Deprecated.
      Use the CharSequence version
      See Also:
    • find

      public static String find(CharSequence self, CharSequence regex)
      Finds the first occurrence of a regular expression String within a String. If the regex doesn't match, null will be returned.

      For example, if the regex doesn't match the result is null:

           assert "New York, NY".find(/\d{5}/) == null
       
      If it does match, we get the matching string back:
            assert "New York, NY 10292-0098".find(/\d{5}/) == "10292"
       
      If we have capture groups in our expression, we still get back the full match
            assert "New York, NY 10292-0098".find(/(\d{5})-?(\d{4})/) == "10292-0098"
       
      Parameters:
      self - a CharSequence
      regex - the capturing regex
      Returns:
      a String containing the matched portion, or null if the regex doesn't match
      Since:
      1.8.2
      See Also:
    • find

      public static String find(CharSequence self, CharSequence regex, Closure closure)
      Returns the result of calling a closure with the first occurrence of a regular expression found within a CharSequence. If the regex doesn't match, the closure will not be called and find will return null.
      Parameters:
      self - a CharSequence
      regex - the capturing regex CharSequence
      closure - the closure that will be passed the full match, plus each of the capturing groups (if any)
      Returns:
      a String containing the result of calling the closure (calling toString() if needed), or null if the regex pattern doesn't match
      Since:
      1.8.2
      See Also:
    • find

      public static String find(CharSequence self, Pattern pattern)
      Finds the first occurrence of a compiled regular expression Pattern within a String. If the pattern doesn't match, null will be returned.

      For example, if the pattern doesn't match the result is null:

           assert "New York, NY".find(~/\d{5}/) == null
       
      If it does match, we get the matching string back:
            assert "New York, NY 10292-0098".find(~/\d{5}/) == "10292"
       
      If we have capture groups in our expression, the groups are ignored and we get back the full match:
            assert "New York, NY 10292-0098".find(~/(\d{5})-?(\d{4})/) == "10292-0098"
       
      If you need to work with capture groups, then use the closure version of this method or use Groovy's matcher operators or use eachMatch.
      Parameters:
      self - a CharSequence
      pattern - the compiled regex Pattern
      Returns:
      a String containing the matched portion, or null if the regex pattern doesn't match
      Since:
      1.8.2
      See Also:
    • find

      public static String find(CharSequence self, Pattern pattern, Closure closure)
      Returns the result of calling a closure with the first occurrence of a compiled regular expression found within a String. If the regex doesn't match, the closure will not be called and find will return null.

      For example, if the pattern doesn't match, the result is null:

           assert "New York, NY".find(~/\d{5}/) { match -> return "-$match-"} == null
       
      If it does match and we don't have any capture groups in our regex, there is a single parameter on the closure that the match gets passed to:
            assert "New York, NY 10292-0098".find(~/\d{5}/) { match -> return "-$match-"} == "-10292-"
       
      If we have capture groups in our expression, our closure has one parameter for the match, followed by one for each of the capture groups:
            assert "New York, NY 10292-0098".find(~/(\d{5})-?(\d{4})/) { match, zip, plusFour ->
                assert match == "10292-0098"
                assert zip == "10292"
                assert plusFour == "0098"
                return zip
            } == "10292"
       
      If we have capture groups in our expression, and our closure has one parameter, the closure will be passed an array with the first element corresponding to the whole match, followed by an element for each of the capture groups:
            assert "New York, NY 10292-0098".find(~/(\d{5})-?(\d{4})/) { array ->
                assert array[0] == "10292-0098"
                assert array[1] == "10292"
                assert array[2] == "0098"
                return array[1]
            } == "10292"
       
      If a capture group is optional, and doesn't match, then the corresponding value for that capture group passed to the closure will be null as illustrated here:
            assert "adsf 233-9999 adsf".find(~/(\d{3})?-?(\d{3})-(\d{4})/) { match, areaCode, exchange, stationNumber ->
                assert "233-9999" == match
                assert null == areaCode
                assert "233" == exchange
                assert "9999" == stationNumber
                return "$exchange$stationNumber"
            } == "2339999"
       
      Parameters:
      self - a CharSequence
      pattern - the compiled regex Pattern
      closure - the closure that will be passed the full match, plus each of the capturing groups (if any)
      Returns:
      a String containing the result of calling the closure (calling toString() if needed), or null if the regex pattern doesn't match
      Since:
      1.8.2
      See Also:
    • find

      @Deprecated public static String find(String self, Pattern pattern)
      Deprecated.
      Use the CharSequence version
      See Also:
    • find

      @Deprecated public static String find(String self, Pattern pattern, Closure closure)
      Deprecated.
      Use the CharSequence version
      See Also:
    • find

      @Deprecated public static String find(String self, String regex)
      Deprecated.
      Use the CharSequence version
      See Also:
    • find

      @Deprecated public static String find(String self, String regex, Closure closure)
      Deprecated.
      Use the CharSequence version
      See Also:
    • findAll

      public static List<String> findAll(CharSequence self, CharSequence regex)
      Returns a (possibly empty) list of all occurrences of a regular expression (provided as a CharSequence) found within a CharSequence.

      For example, if the regex doesn't match, it returns an empty list:

       assert "foo".findAll(/(\w*) Fish/) == []
       
      Any regular expression matches are returned in a list, and all regex capture groupings are ignored, only the full match is returned:
       def expected = ["One Fish", "Two Fish", "Red Fish", "Blue Fish"]
       assert "One Fish, Two Fish, Red Fish, Blue Fish".findAll(/(\w*) Fish/) == expected
       
      If you need to work with capture groups, then use the closure version of this method or use Groovy's matcher operators or use eachMatch.
      Parameters:
      self - a CharSequence
      regex - the capturing regex CharSequence
      Returns:
      a List containing all full matches of the regex within the CharSequence, an empty list will be returned if there are no matches
      Since:
      1.8.2
      See Also:
    • findAll

      public static <T> List<T> findAll(CharSequence self, CharSequence regex, Closure<T> closure)
      Finds all occurrences of a regular expression string within a CharSequence. Any matches are passed to the specified closure. The closure is expected to have the full match in the first parameter. If there are any capture groups, they will be placed in subsequent parameters.

      If there are no matches, the closure will not be called, and an empty List will be returned.

      For example, if the regex doesn't match, it returns an empty list:

       assert "foo".findAll(/(\w*) Fish/) { match, firstWord -> return firstWord } == []
       
      Any regular expression matches are passed to the closure, if there are no capture groups, there will be one parameter for the match:
       assert "I could not, would not, with a fox.".findAll(/.ould/) { match -> "${match}n't"} == ["couldn't", "wouldn't"]
       
      If there are capture groups, the first parameter will be the match followed by one parameter for each capture group:
       def orig = "There's a Wocket in my Pocket"
       assert orig.findAll(/(.)ocket/) { match, firstLetter -> "$firstLetter > $match" } == ["W > Wocket", "P > Pocket"]
       
      Parameters:
      self - a CharSequence
      regex - the capturing regex CharSequence
      closure - will be passed the full match plus each of the capturing groups (if any)
      Returns:
      a List containing all results from calling the closure with each full match (and potentially capturing groups) of the regex within the CharSequence, an empty list will be returned if there are no matches
      Since:
      1.8.2
      See Also:
    • findAll

      public static List<String> findAll(CharSequence self, Pattern pattern)
      Returns a (possibly empty) list of all occurrences of a regular expression (in Pattern format) found within a CharSequence.

      For example, if the pattern doesn't match, it returns an empty list:

       assert "foo".findAll(~/(\w*) Fish/) == []
       
      Any regular expression matches are returned in a list, and all regex capture groupings are ignored, only the full match is returned:
       def expected = ["One Fish", "Two Fish", "Red Fish", "Blue Fish"]
       assert "One Fish, Two Fish, Red Fish, Blue Fish".findAll(~/(\w*) Fish/) == expected
       
      Parameters:
      self - a CharSequence
      pattern - the compiled regex Pattern
      Returns:
      a List containing all full matches of the Pattern within the CharSequence, an empty list will be returned if there are no matches
      Since:
      1.8.2
      See Also:
    • findAll

      public static <T> List<T> findAll(CharSequence self, Pattern pattern, Closure<T> closure)
      Finds all occurrences of a compiled regular expression Pattern within a CharSequence. Any matches are passed to the specified closure. The closure is expected to have the full match in the first parameter. If there are any capture groups, they will be placed in subsequent parameters.

      If there are no matches, the closure will not be called, and an empty List will be returned.

      For example, if the pattern doesn't match, it returns an empty list:

       assert "foo".findAll(~/(\w*) Fish/) { match, firstWord -> return firstWord } == []
       
      Any regular expression matches are passed to the closure, if there are no capture groups, there will be one parameter for the match:
       assert "I could not, would not, with a fox.".findAll(~/.ould/) { match -> "${match}n't"} == ["couldn't", "wouldn't"]
       
      If there are capture groups, the first parameter will be the match followed by one parameter for each capture group:
       def orig = "There's a Wocket in my Pocket"
       assert orig.findAll(~/(.)ocket/) { match, firstLetter -> "$firstLetter > $match" } == ["W > Wocket", "P > Pocket"]
       
      Parameters:
      self - a CharSequence
      pattern - the compiled regex Pattern
      closure - will be passed the full match plus each of the capturing groups (if any)
      Returns:
      a List containing all results from calling the closure with each full match (and potentially capturing groups) of the regex pattern within the CharSequence, an empty list will be returned if there are no matches
      Since:
      1.8.2
      See Also:
    • findAll

      @Deprecated public static List<String> findAll(String self, Pattern pattern)
      Deprecated.
      Use the CharSequence version
      See Also:
    • findAll

      @Deprecated public static <T> List<T> findAll(String self, Pattern pattern, Closure<T> closure)
      Deprecated.
      Use the CharSequence version
      See Also:
    • findAll

      @Deprecated public static List<String> findAll(String self, String regex)
      Deprecated.
      Use the CharSequence version
      See Also:
    • findAll

      @Deprecated public static <T> List<T> findAll(String self, String regex, Closure<T> closure)
      Deprecated.
      Use the CharSequence version
      See Also:
    • getAt

      public static String getAt(CharSequence self, Collection indices)
      Select a List of characters from a CharSequence using a Collection to identify the indices to be selected.
      Parameters:
      self - a CharSequence
      indices - a Collection of indices
      Returns:
      a String consisting of the characters at the given indices
      Since:
      1.0
    • getAt

      public static String getAt(CharSequence text, EmptyRange range)
      Support the range subscript operator for CharSequence or StringBuffer with EmptyRange
      Parameters:
      text - a CharSequence
      range - an EmptyRange
      Returns:
      the empty String
      Since:
      1.5.0
    • getAt

      public static CharSequence getAt(CharSequence text, int index)
      Support the subscript operator for CharSequence.
      Parameters:
      text - a CharSequence
      index - the index of the Character to get
      Returns:
      the Character at the given index
      Since:
      1.0
    • getAt

      public static String getAt(GString text, int index)
      Support the subscript operator for GString.
      Parameters:
      text - a GString
      index - the index of the Character to get
      Returns:
      the Character at the given index
      Since:
      2.3.7
    • getAt

      public static CharSequence getAt(CharSequence text, IntRange range)
      Support the range subscript operator for CharSequence with IntRange
      Parameters:
      text - a CharSequence
      range - an IntRange
      Returns:
      the subsequence CharSequence
      Since:
      1.0
    • getAt

      public static String getAt(GString text, IntRange range)
      Support the range subscript operator for GString with IntRange
      Parameters:
      text - a GString
      range - an IntRange
      Returns:
      the String of characters corresponding to the provided range
      Since:
      2.3.7
    • getAt

      public static CharSequence getAt(CharSequence text, Range range)
      Support the range subscript operator for CharSequence
      Parameters:
      text - a CharSequence
      range - a Range
      Returns:
      the subsequence CharSequence
      Since:
      1.0
    • getAt

      public static String getAt(GString text, Range range)
      Support the range subscript operator for GString
      Parameters:
      text - a GString
      range - a Range
      Returns:
      the String of characters corresponding to the provided range
      Since:
      2.3.7
    • getAt

      public static List getAt(Matcher self, Collection indices)
      Select a List of values from a Matcher using a Collection to identify the indices to be selected.
      Parameters:
      self - a Matcher
      indices - a Collection of indices
      Returns:
      a String of the values at the given indices
      Since:
      1.6.0
    • getAt

      public static Object getAt(Matcher matcher, int idx)
      Support the subscript operator, e.g. matcher[index], for a regex Matcher.

      For an example using no group match,

          def p = /ab[d|f]/
          def m = "abcabdabeabf" =~ p
          assert 2 == m.count
          assert 2 == m.size() // synonym for m.getCount()
          assert ! m.hasGroup()
          assert 0 == m.groupCount()
          def matches = ["abd", "abf"]
          for (i in 0..<m.count) {
            assert m[i] == matches[i]
          }
       

      For an example using group matches,

          def p = /(?:ab([c|d|e|f]))/
          def m = "abcabdabeabf" =~ p
          assert 4 == m.count
          assert m.hasGroup()
          assert 1 == m.groupCount()
          def matches = [["abc", "c"], ["abd", "d"], ["abe", "e"], ["abf", "f"]]
          for (i in 0..<m.count) {
            assert m[i] == matches[i]
          }
       

      For another example using group matches,

          def m = "abcabdabeabfabxyzabx" =~ /(?:ab([d|x-z]+))/
          assert 3 == m.count
          assert m.hasGroup()
          assert 1 == m.groupCount()
          def matches = [["abd", "d"], ["abxyz", "xyz"], ["abx", "x"]]
          for (i in 0..<m.count) {
            assert m[i] == matches[i]
          }
       
      Parameters:
      matcher - a Matcher
      idx - an index
      Returns:
      object a matched String if no groups matched, list of matched groups otherwise.
      Since:
      1.0
    • matchesPartially

      public static boolean matchesPartially(Matcher matcher)
      Given a matcher that matches a string against a pattern, this method returns true when the string matches the pattern or if a longer string, could match the pattern. For example:
           def emailPattern = /\w+@\w+\.\w{2,}/
      
           def matcher = "john@doe" =~ emailPattern
           assert matcher.matchesPartially()
      
           matcher = "john@doe.com" =~ emailPattern
           assert matcher.matchesPartially()
      
           matcher = "john@@" =~ emailPattern
           assert !matcher.matchesPartially()
       
      Parameters:
      matcher - the Matcher
      Returns:
      true if more input to the String could make the matcher match the associated pattern, false otherwise.
      Since:
      2.0.0
    • getAt

      @Deprecated public static String getAt(String self, Collection indices)
      Deprecated.
      Use the CharSequence version
      See Also:
    • getAt

      @Deprecated public static String getAt(String text, EmptyRange range)
      Deprecated.
      Use the CharSequence version
      See Also:
    • getAt

      public static String getAt(String text, int index)
      Support the subscript operator for String.
      Parameters:
      text - a String
      index - the index of the Character to get
      Returns:
      the Character at the given index
      Since:
      1.0
    • getAt

      public static String getAt(String text, IntRange range)
      Support the range subscript operator for String with IntRange
      Parameters:
      text - a String
      range - an IntRange
      Returns:
      the resulting String
      Since:
      1.0
    • getAt

      public static String getAt(String text, Range range)
      Support the range subscript operator for String
      Parameters:
      text - a String
      range - a Range
      Returns:
      a substring corresponding to the Range
      Since:
      1.0
    • getChars

      public static char[] getChars(CharSequence self)
      Converts the given CharSequence into an array of characters.
      Parameters:
      self - a CharSequence
      Returns:
      an array of characters
      Since:
      1.8.2
      See Also:
    • getChars

      @Deprecated public static char[] getChars(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • getCount

      public static int getCount(Matcher matcher)
      Find the number of Strings matched to the given Matcher.
      Parameters:
      matcher - a Matcher
      Returns:
      int the number of Strings matched to the given matcher.
      Since:
      1.0
    • hasGroup

      public static boolean hasGroup(Matcher matcher)
      Check whether a Matcher contains a group or not.
      Parameters:
      matcher - a Matcher
      Returns:
      boolean true if matcher contains at least one group.
      Since:
      1.0
    • isAllWhitespace

      public static boolean isAllWhitespace(CharSequence self)
      True if a CharSequence only contains whitespace characters.
      Parameters:
      self - The CharSequence to check the characters in
      Returns:
      true If all characters are whitespace characters
      Since:
      1.8.2
      See Also:
    • isAllWhitespace

      @Deprecated public static boolean isAllWhitespace(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • isBigDecimal

      public static boolean isBigDecimal(CharSequence self)
      Determine if a CharSequence can be parsed as a BigDecimal.
      Parameters:
      self - a CharSequence
      Returns:
      true if the CharSequence can be parsed
      Since:
      1.8.2
      See Also:
    • isBigDecimal

      @Deprecated public static boolean isBigDecimal(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • isBigInteger

      public static boolean isBigInteger(CharSequence self)
      Determine if a CharSequence can be parsed as a BigInteger.
      Parameters:
      self - a CharSequence
      Returns:
      true if the CharSequence can be parsed
      Since:
      1.8.2
      See Also:
    • isBigInteger

      @Deprecated public static boolean isBigInteger(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • isCase

      public static boolean isCase(CharSequence caseValue, Object switchValue)
      'Case' implementation for a CharSequence, which uses equals between the toString() of the caseValue and the switchValue. This allows CharSequence values to be used in switch statements. For example:
       switch( str ) {
         case 'one' :
         // etc...
       }
       
      Note that this returns true for the case where both the 'switch' and 'case' operand is null.
      Parameters:
      caseValue - the case value
      switchValue - the switch value
      Returns:
      true if the switchValue's toString() equals the caseValue
      Since:
      1.8.2
    • isCase

      @Deprecated public static boolean isCase(GString caseValue, Object switchValue)
      Deprecated.
      Use the CharSequence version
      See Also:
    • isCase

      public static boolean isCase(Pattern caseValue, Object switchValue)
      'Case' implementation for the Pattern class, which allows testing a String against a number of regular expressions. For example:
      switch( str ) {
         case ~/one/ :
           // the regex 'one' matches the value of str
       }
       
      Note that this returns true for the case where both the pattern and the 'switch' values are null.
      Parameters:
      caseValue - the case value
      switchValue - the switch value
      Returns:
      true if the switchValue is deemed to match the caseValue
      Since:
      1.0
    • isCase

      @Deprecated public static boolean isCase(String caseValue, Object switchValue)
      Deprecated.
      Use the CharSequence version
      See Also:
    • isDouble

      public static boolean isDouble(CharSequence self)
      Determine if a CharSequence can be parsed as a Double.
      Parameters:
      self - a CharSequence
      Returns:
      true if the CharSequence can be parsed
      Since:
      1.8.2
      See Also:
    • isDouble

      @Deprecated public static boolean isDouble(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • isFloat

      public static boolean isFloat(CharSequence self)
      Determine if a CharSequence can be parsed as a Float.
      Parameters:
      self - a CharSequence
      Returns:
      true if the CharSequence can be parsed
      Since:
      1.8.2
      See Also:
    • isFloat

      @Deprecated public static boolean isFloat(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • isInteger

      public static boolean isInteger(CharSequence self)
      Determine if a CharSequence can be parsed as an Integer.
      Parameters:
      self - a CharSequence
      Returns:
      true if the CharSequence can be parsed
      Since:
      1.8.2
      See Also:
    • isInteger

      @Deprecated public static boolean isInteger(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • isLong

      public static boolean isLong(CharSequence self)
      Determine if a CharSequence can be parsed as a Long.
      Parameters:
      self - a CharSequence
      Returns:
      true if the CharSequence can be parsed
      Since:
      1.8.2
      See Also:
    • isLong

      @Deprecated public static boolean isLong(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • isNumber

      public static boolean isNumber(CharSequence self)
      Determine if a CharSequence can be parsed as a Number. Synonym for 'isBigDecimal()'.
      Parameters:
      self - a CharSequence
      Returns:
      true if the CharSequence can be parsed
      Since:
      1.8.2
      See Also:
    • isNumber

      @Deprecated public static boolean isNumber(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • iterator

      public static Iterator iterator(Matcher matcher)
      Returns an Iterator which traverses each match.
      Parameters:
      matcher - a Matcher object
      Returns:
      an Iterator for a Matcher
      Since:
      1.0
      See Also:
    • leftShift

      public static StringBuilder leftShift(CharSequence self, Object value)
      Overloads the left shift operator to provide an easy way to append multiple objects as string representations to a CharSequence.
      Parameters:
      self - a CharSequence
      value - an Object
      Returns:
      a StringBuilder built from this CharSequence
      Since:
      1.8.2
    • leftShift

      public static StringBuffer leftShift(String self, Object value)
      Overloads the left shift operator to provide an easy way to append multiple objects as string representations to a String.
      Parameters:
      self - a String
      value - an Object
      Returns:
      a StringBuffer built from this string
      Since:
      1.0
    • leftShift

      public static StringBuffer leftShift(StringBuffer self, Object value)
      Overloads the left shift operator to provide an easy way to append multiple objects as string representations to a StringBuffer.
      Parameters:
      self - a StringBuffer
      value - a value to append
      Returns:
      the StringBuffer on which this operation was invoked
      Since:
      1.0
    • leftShift

      public static StringBuilder leftShift(StringBuilder self, Object value)
      Overloads the left shift operator to provide syntactic sugar for appending to a StringBuilder.
      Parameters:
      self - a StringBuilder
      value - an Object
      Returns:
      the original StringBuilder
      Since:
      1.8.2
    • matches

      public static boolean matches(CharSequence self, Pattern pattern)
      Tells whether or not a CharSequence matches the given compiled regular expression Pattern.
      Parameters:
      self - the CharSequence that is to be matched
      pattern - the regex Pattern to which the string of interest is to be matched
      Returns:
      true if the CharSequence matches
      Since:
      1.8.2
      See Also:
    • matches

      @Deprecated public static boolean matches(String self, Pattern pattern)
      Deprecated.
      Use the CharSequence version
      See Also:
    • minus

      public static String minus(CharSequence self, Object target)
      Remove a part of a CharSequence by replacing the first occurrence of target within self with '' and returns the result.
      Parameters:
      self - a CharSequence
      target - an object representing the part to remove
      Returns:
      a String containing the original minus the part to be removed
      Since:
      1.8.2
      See Also:
    • minus

      public static String minus(CharSequence self, Pattern pattern)
      Remove a part of a CharSequence. This replaces the first occurrence of the pattern within self with '' and returns the result.
      Parameters:
      self - a String
      pattern - a Pattern representing the part to remove
      Returns:
      a String minus the part to be removed
      Since:
      2.2.0
    • minus

      @Deprecated public static String minus(String self, Pattern pattern)
      Deprecated.
      Use the CharSequence version
      See Also:
    • minus

      @Deprecated public static String minus(String self, Object target)
      Deprecated.
      Use the CharSequence version
      See Also:
    • multiply

      public static String multiply(CharSequence self, Number factor)
      Repeat a CharSequence a certain number of times.
      Parameters:
      self - a CharSequence to be repeated
      factor - the number of times the CharSequence should be repeated
      Returns:
      a String composed of a repetition
      Throws:
      IllegalArgumentException - if the number of repetitions is < 0
      Since:
      1.8.2
    • multiply

      @Deprecated public static String multiply(String self, Number factor)
      Deprecated.
      Use the CharSequence version
      See Also:
    • next

      public static String next(CharSequence self)
      This method is called by the ++ operator for the class CharSequence. It increments the last character in the given CharSequence. If the last character in the CharSequence is Character.MAX_VALUE a Character.MIN_VALUE will be appended. The empty CharSequence is incremented to a string consisting of the character Character.MIN_VALUE.
      Parameters:
      self - a CharSequence
      Returns:
      a value obtained by incrementing the toString() of the CharSequence
      Since:
      1.8.2
    • next

      @Deprecated public static String next(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • normalize

      public static String normalize(CharSequence self)
      Return a String with linefeeds and carriage returns normalized to linefeeds.
      Parameters:
      self - a CharSequence object
      Returns:
      the normalized toString() for the CharSequence
      Since:
      1.8.2
      See Also:
    • normalize

      @Deprecated public static String normalize(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • padLeft

      public static String padLeft(CharSequence self, Number numberOfChars)
      Pad a CharSequence to a minimum length specified by numberOfChars by adding the space character to the left as many times as needed. If the String is already the same size or bigger than the target numberOfChars, then the original String is returned. An example:
       println 'Numbers:'
       [1, 10, 100, 1000].each{ println it.toString().padLeft(5) }
       
      will produce output like:
       Numbers:
           1
          10
         100
        1000
       
      Parameters:
      self - a CharSequence object
      numberOfChars - the total minimum number of characters of the resulting CharSequence
      Returns:
      the CharSequence padded to the left as a String
      Since:
      1.8.2
      See Also:
    • padLeft

      public static String padLeft(CharSequence self, Number numberOfChars, CharSequence padding)
      Pad a CharSequence to a minimum length specified by numberOfChars, adding the supplied padding CharSequence as many times as needed to the left. If the CharSequence is already the same size or bigger than the target numberOfChars, then the toString() of the original CharSequence is returned. An example:
       println 'Numbers:'
       [1, 10, 100, 1000].each{ println it.toString().padLeft(5, '*') }
       [2, 20, 200, 2000].each{ println it.toString().padLeft(5, '*_') }
       
      will produce output like:
       Numbers:
       ****1
       ***10
       **100
       *1000
       *_*_2
       *_*20
       *_200
       *2000
       
      Parameters:
      self - a CharSequence object
      numberOfChars - the total minimum number of characters of the resulting CharSequence
      padding - the characters used for padding
      Returns:
      the CharSequence padded to the left as a String
      Since:
      1.8.2
      See Also:
    • padLeft

      @Deprecated public static String padLeft(String self, Number numberOfChars)
      Deprecated.
      Use the CharSequence version
      See Also:
    • padLeft

      @Deprecated public static String padLeft(String self, Number numberOfChars, String padding)
      Deprecated.
      Use the CharSequence version
      See Also:
    • padRight

      public static String padRight(CharSequence self, Number numberOfChars)
      Pad a CharSequence to a minimum length specified by numberOfChars by adding the space character to the right as many times as needed. If the CharSequence is already the same size or bigger than the target numberOfChars, then the toString() of the original CharSequence is returned. An example:
       ['A', 'BB', 'CCC', 'DDDD'].each{ println it.padRight(5) + it.size() }
       
      will produce output like:
       A    1
       BB   2
       CCC  3
       DDDD 4
       
      Parameters:
      self - a CharSequence object
      numberOfChars - the total minimum number of characters of the resulting string
      Returns:
      the CharSequence padded to the right as a String
      Since:
      1.8.2
      See Also:
    • padRight

      public static String padRight(CharSequence self, Number numberOfChars, CharSequence padding)
      Pad a CharSequence to a minimum length specified by numberOfChars, adding the supplied padding CharSequence as many times as needed to the right. If the CharSequence is already the same size or bigger than the target numberOfChars, then the toString() of the original CharSequence is returned. An example:
       ['A', 'BB', 'CCC', 'DDDD'].each{ println it.padRight(5, '#') + it.size() }
       
      will produce output like:
       A####1
       BB###2
       CCC##3
       DDDD#4
       
      Parameters:
      self - a CharSequence object
      numberOfChars - the total minimum number of characters of the resulting CharSequence
      padding - the characters used for padding
      Returns:
      the CharSequence padded to the right as a String
      Since:
      1.8.2
    • padRight

      @Deprecated public static String padRight(String self, Number numberOfChars)
      Deprecated.
      Use the CharSequence version
      See Also:
    • padRight

      @Deprecated public static String padRight(String self, Number numberOfChars, String padding)
      Deprecated.
      Use the CharSequence version
      See Also:
    • plus

      public static String plus(CharSequence left, Object value)
      Appends the String representation of the given operand to this CharSequence.
      Parameters:
      left - a CharSequence
      value - any Object
      Returns:
      the original toString() of the CharSequence with the object appended
      Since:
      1.8.2
    • plus

      public static String plus(Number value, String right)
      Appends a String to the string representation of this number.
      Parameters:
      value - a Number
      right - a String
      Returns:
      a String
      Since:
      1.0
    • plus

      @Deprecated public static String plus(String left, Object value)
      Deprecated.
      Use the CharSequence version
      See Also:
    • plus

      public static String plus(String left, CharSequence value)
      Appends the String representation of the given operand to this string.
      Parameters:
      left - a String
      value - any CharSequence
      Returns:
      the new string with the object appended
      Since:
      2.2
    • plus

      public static String plus(StringBuffer left, String value)
      Appends a String to this StringBuffer.
      Parameters:
      left - a StringBuffer
      value - a String
      Returns:
      a String
      Since:
      1.0
    • previous

      public static String previous(CharSequence self)
      This method is called by the -- operator for the class CharSequence. It decrements the last character in the given CharSequence. If the last character in the CharSequence is Character.MIN_VALUE it will be deleted. The empty CharSequence can't be decremented.
      Parameters:
      self - a CharSequence
      Returns:
      a String with a decremented character at the end
      Since:
      1.8.2
      See Also:
    • previous

      @Deprecated public static String previous(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • putAt

      public static void putAt(StringBuffer self, EmptyRange range, Object value)
      Support the range subscript operator for StringBuffer.
      Parameters:
      self - a StringBuffer
      range - a Range
      value - the object that's toString() will be inserted
      Since:
      1.0
    • putAt

      public static void putAt(StringBuffer self, IntRange range, Object value)
      Support the range subscript operator for StringBuffer. Index values are treated as characters within the buffer.
      Parameters:
      self - a StringBuffer
      range - a Range
      value - the object that's toString() will be inserted
      Since:
      1.0
    • readLines

      public static List<String> readLines(CharSequence self)
      Return the lines of a CharSequence as a List of String.
      Parameters:
      self - a CharSequence object
      Returns:
      a list of lines
      Since:
      1.8.2
    • readLines

      @Deprecated public static List<String> readLines(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • replaceAll

      public static String replaceAll(CharSequence self, CharSequence regex, CharSequence replacement)
      Replaces each substring of this CharSequence that matches the given regular expression with the given replacement.
      Parameters:
      self - a CharSequence
      regex - the capturing regex
      replacement - the string to be substituted for each match
      Returns:
      the toString() of the CharSequence with content replaced
      Throws:
      PatternSyntaxException - if the regular expression's syntax is invalid
      Since:
      1.8.2
      See Also:
    • replaceAll

      public static String replaceAll(CharSequence self, CharSequence regex, Closure closure)
      Replaces all occurrences of a captured group by the result of calling a closure on that text.

      Examples:

           assert "hello world".replaceAll("(o)") { it[0].toUpperCase() } == "hellO wOrld"
      
           assert "foobar-FooBar-".replaceAll("(([fF][oO]{2})[bB]ar)", { Object[] it -> it[0].toUpperCase() }) == "FOOBAR-FOOBAR-"
      
           // Here,
           //   it[0] is the global string of the matched group
           //   it[1] is the first string in the matched group
           //   it[2] is the second string in the matched group
      
           assert "foobar-FooBar-".replaceAll("(([fF][oO]{2})[bB]ar)", { x, y, z -> z.toUpperCase() }) == "FOO-FOO-"
      
           // Here,
           //   x is the global string of the matched group
           //   y is the first string in the matched group
           //   z is the second string in the matched group
       
      Note that unlike String.replaceAll(String regex, String replacement), where the replacement string treats '$' and '\' specially (for group substitution), the result of the closure is converted to a string and that value is used literally for the replacement.
      Parameters:
      self - a CharSequence
      regex - the capturing regex
      closure - the closure to apply on each captured group
      Returns:
      the toString() of the CharSequence with content replaced
      Throws:
      PatternSyntaxException - if the regular expression's syntax is invalid
      Since:
      1.8.2
      See Also:
    • replaceAll

      public static String replaceAll(CharSequence self, Pattern pattern, CharSequence replacement)
      Replaces all substrings of a CharSequence that match the given compiled regular expression with the given replacement.

      Note that backslashes (\) and dollar signs ($) in the replacement string may cause the results to be different than if it were being treated as a literal replacement string; see Matcher.replaceAll(java.lang.String). Use Matcher.quoteReplacement(java.lang.String) to suppress the special meaning of these characters, if desired.

       assert "foo".replaceAll('o', 'X') == 'fXX'
       
      Parameters:
      self - the CharSequence that is to be matched
      pattern - the regex Pattern to which the CharSequence of interest is to be matched
      replacement - the CharSequence to be substituted for the first match
      Returns:
      The resulting String
      Since:
      1.8.2
      See Also:
    • replaceAll

      public static String replaceAll(CharSequence self, Pattern pattern, Closure closure)
      Replaces all occurrences of a captured group by the result of a closure call on that text.

      For examples,

           assert "hello world".replaceAll(~"(o)") { it[0].toUpperCase() } == "hellO wOrld"
      
           assert "foobar-FooBar-".replaceAll(~"(([fF][oO]{2})[bB]ar)", { it[0].toUpperCase() }) == "FOOBAR-FOOBAR-"
      
           // Here,
           //   it[0] is the global string of the matched group
           //   it[1] is the first string in the matched group
           //   it[2] is the second string in the matched group
      
           assert "foobar-FooBar-".replaceAll(~"(([fF][oO]{2})[bB]ar)", { Object[] it -> it[0].toUpperCase() }) == "FOOBAR-FOOBAR-"
      
           // Here,
           //   it[0] is the global string of the matched group
           //   it[1] is the first string in the matched group
           //   it[2] is the second string in the matched group
      
           assert "foobar-FooBar-".replaceAll("(([fF][oO]{2})[bB]ar)", { x, y, z -> z.toUpperCase() }) == "FOO-FOO-"
      
           // Here,
           //   x is the global string of the matched group
           //   y is the first string in the matched group
           //   z is the second string in the matched group
       
      Note that unlike String.replaceAll(String regex, String replacement), where the replacement string treats '$' and '\' specially (for group substitution), the result of the closure is converted to a string and that value is used literally for the replacement.
      Parameters:
      self - a CharSequence
      pattern - the capturing regex Pattern
      closure - the closure to apply on each captured group
      Returns:
      the toString() of the CharSequence with replaced content
      Since:
      1.8.2
      See Also:
    • replaceAll

      @Deprecated public static String replaceAll(String self, Pattern pattern, Closure closure)
      Deprecated.
      Use the CharSequence version
      See Also:
    • replaceAll

      @Deprecated public static String replaceAll(String self, Pattern pattern, String replacement)
      Deprecated.
      Use the CharSequence version
      See Also:
    • replaceAll

      @Deprecated public static String replaceAll(String self, String regex, Closure closure)
      Deprecated.
      Use the CharSequence version
      See Also:
    • replaceFirst

      public static String replaceFirst(CharSequence self, CharSequence regex, CharSequence replacement)
      Replaces the first substring of this CharSequence that matches the given regular expression with the given replacement.
      Parameters:
      self - a CharSequence
      regex - the capturing regex
      replacement - the CharSequence to be substituted for each match
      Returns:
      a CharSequence with replaced content
      Throws:
      PatternSyntaxException - if the regular expression's syntax is invalid
      Since:
      1.8.2
      See Also:
    • replaceFirst

      public static String replaceFirst(CharSequence self, CharSequence regex, Closure closure)
      Replaces the first occurrence of a captured group by the result of a closure call on that text.

      For example (with some replaceAll variants thrown in for comparison purposes),

       assert "hello world".replaceFirst("(o)") { it[0].toUpperCase() } == "hellO world" // first match
       assert "hello world".replaceAll("(o)") { it[0].toUpperCase() } == "hellO wOrld" // all matches
      
       assert "one fish, two fish".replaceFirst(/([a-z]{3})\s([a-z]{4})/) { [one:1, two:2][it[1]] + '-' + it[2].toUpperCase() } == '1-FISH, two fish'
       assert "one fish, two fish".replaceAll(/([a-z]{3})\s([a-z]{4})/) { [one:1, two:2][it[1]] + '-' + it[2].toUpperCase() } == '1-FISH, 2-FISH'
       
      Parameters:
      self - a CharSequence
      regex - the capturing regex
      closure - the closure to apply on the first captured group
      Returns:
      a CharSequence with replaced content
      Throws:
      PatternSyntaxException - if the regular expression's syntax is invalid
      Since:
      1.8.2
      See Also:
    • replaceFirst

      public static String replaceFirst(CharSequence self, Pattern pattern, CharSequence replacement)
      Replaces the first substring of a CharSequence that matches the given compiled regular expression with the given replacement.

      Note that backslashes (\) and dollar signs ($) in the replacement string may cause the results to be different than if it were being treated as a literal replacement string; see Matcher.replaceFirst(java.lang.String). Use Matcher.quoteReplacement(java.lang.String) to suppress the special meaning of these characters, if desired.

       assert "foo".replaceFirst('o', 'X') == 'fXo'
       
      Parameters:
      self - the CharSequence that is to be matched
      pattern - the regex Pattern to which the CharSequence of interest is to be matched
      replacement - the CharSequence to be substituted for the first match
      Returns:
      The resulting String
      Since:
      1.8.2
      See Also:
    • replaceFirst

      public static String replaceFirst(CharSequence self, Pattern pattern, Closure closure)
      Replaces the first occurrence of a captured group by the result of a closure call on that text.

      For example (with some replaceAll variants thrown in for comparison purposes),

       assert "hellO world" == "hello world".replaceFirst(~"(o)") { it[0].toUpperCase() } // first match
       assert "hellO wOrld" == "hello world".replaceAll(~"(o)") { it[0].toUpperCase() }   // all matches
      
       assert '1-FISH, two fish' == "one fish, two fish".replaceFirst(~/([a-z]{3})\s([a-z]{4})/) { [one:1, two:2][it[1]] + '-' + it[2].toUpperCase() }
       assert '1-FISH, 2-FISH' == "one fish, two fish".replaceAll(~/([a-z]{3})\s([a-z]{4})/) { [one:1, two:2][it[1]] + '-' + it[2].toUpperCase() }
       
      Parameters:
      self - a CharSequence
      pattern - the capturing regex Pattern
      closure - the closure to apply on the first captured group
      Returns:
      a CharSequence with replaced content
      Since:
      1.8.2
    • replaceFirst

      @Deprecated public static String replaceFirst(String self, Pattern pattern, Closure closure)
      Deprecated.
      Use the CharSequence version
      See Also:
    • replaceFirst

      @Deprecated public static String replaceFirst(String self, Pattern pattern, String replacement)
      Deprecated.
      Use the CharSequence version
      See Also:
    • replaceFirst

      @Deprecated public static String replaceFirst(String self, String regex, Closure closure)
      Deprecated.
      Use the CharSequence version
      See Also:
    • reverse

      public static String reverse(CharSequence self)
      Creates a String which is the reverse (backwards) of this CharSequence
      Parameters:
      self - a CharSequence
      Returns:
      a new String with all the characters reversed.
      Since:
      1.8.2
      See Also:
    • reverse

      @Deprecated public static String reverse(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • setIndex

      public static void setIndex(Matcher matcher, int idx)
      Set the position of the given Matcher to the given index.
      Parameters:
      matcher - a Matcher
      idx - the index number
      Since:
      1.0
    • size

      public static int size(CharSequence text)
      Provide the standard Groovy size() method for CharSequence.
      Parameters:
      text - a CharSequence
      Returns:
      the length of the CharSequence
      Since:
      1.8.2
    • size

      public static long size(Matcher self)
      Provide the standard Groovy size() method for Matcher.
      Parameters:
      self - a matcher object
      Returns:
      the matcher's size (count)
      Since:
      1.5.0
    • size

      public static int size(String text)
      Provide the standard Groovy size() method for String.
      Parameters:
      text - a String
      Returns:
      the length of the String
      Since:
      1.0
    • size

      public static int size(StringBuffer buffer)
      Provide the standard Groovy size() method for StringBuffer.
      Parameters:
      buffer - a StringBuffer
      Returns:
      the length of the StringBuffer
      Since:
      1.0
    • split

      public static String[] split(CharSequence self)
      Convenience method to split a CharSequence (with whitespace as delimiter). Similar to tokenize, but returns an Array of String instead of a List.
      Parameters:
      self - the CharSequence to split
      Returns:
      String[] result of split
      Since:
      1.8.2
      See Also:
    • split

      @Deprecated public static String[] split(GString self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • split

      @Deprecated public static String[] split(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • splitEachLine

      public static <T> T splitEachLine(CharSequence self, CharSequence regex, Closure<T> closure) throws IOException
      Iterates through the given CharSequence line by line, splitting each line using the given regex delimiter. The list of tokens for each line is then passed to the given closure.
      Parameters:
      self - a CharSequence
      regex - the delimiting regular expression
      closure - a closure
      Returns:
      the last value returned by the closure
      Throws:
      IOException - if an error occurs
      PatternSyntaxException - if the regular expression's syntax is invalid
      Since:
      1.8.2
      See Also:
    • splitEachLine

      public static <T> T splitEachLine(CharSequence self, Pattern pattern, Closure<T> closure)
      Iterates through the given CharSequence line by line, splitting each line using the given separator Pattern. The list of tokens for each line is then passed to the given closure.
      Parameters:
      self - a CharSequence
      pattern - the regular expression Pattern for the delimiter
      closure - a closure
      Returns:
      the last value returned by the closure
      Since:
      1.8.2
    • splitEachLine

      @Deprecated public static <T> T splitEachLine(String self, Pattern pattern, Closure<T> closure) throws IOException
      Deprecated.
      Use the CharSequence version
      Throws:
      IOException
      See Also:
    • splitEachLine

      @Deprecated public static <T> T splitEachLine(String self, String regex, Closure<T> closure) throws IOException
      Deprecated.
      Use the CharSequence version
      Throws:
      IOException
      See Also:
    • stripIndent

      public static String stripIndent(CharSequence self)
      Strip leading spaces from every line in a CharSequence. The line with the least number of leading spaces determines the number to remove. Lines only containing whitespace are ignored when calculating the number of leading spaces to strip.
       assert '  A\n B\nC' == '   A\n  B\n C'.stripIndent()
       
      Parameters:
      self - The CharSequence to strip the leading spaces from
      Returns:
      the stripped toString() of the CharSequence
      Since:
      1.8.2
      See Also:
    • stripIndent

      public static String stripIndent(CharSequence self, int numChars)
      Strip numChar leading characters from every line in a CharSequence.
       assert 'DEF\n456' == '''ABCDEF\n123456'''.stripIndent(3)
       
      Parameters:
      self - The CharSequence to strip the characters from
      numChars - The number of characters to strip
      Returns:
      the stripped String
      Since:
      1.8.2
    • stripIndent

      @Deprecated public static String stripIndent(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • stripIndent

      @Deprecated public static String stripIndent(String self, int numChars)
      Deprecated.
      Use the CharSequence version
      See Also:
    • stripMargin

      public static String stripMargin(CharSequence self)
      Strip leading whitespace/control characters followed by '|' from every line in a CharSequence.
       assert 'ABC\n123\n456' == '''ABC
                                   |123
                                   |456'''.stripMargin()
       
      Parameters:
      self - The CharSequence to strip the margin from
      Returns:
      the stripped String
      Since:
      1.8.2
      See Also:
    • stripMargin

      public static String stripMargin(CharSequence self, char marginChar)
      Strip leading whitespace/control characters followed by marginChar from every line in a CharSequence.
       assert 'ABC\n123\n456' == '''ABC
                                   *123
                                   *456'''.stripMargin('*')
       
      Parameters:
      self - The CharSequence to strip the margin from
      marginChar - Any character that serves as margin delimiter
      Returns:
      the stripped String
      Since:
      1.8.2
      See Also:
    • stripMargin

      public static String stripMargin(CharSequence self, CharSequence marginChar)
      Strip leading whitespace/control characters followed by marginChar from every line in a CharSequence.
      Parameters:
      self - The CharSequence to strip the margin from
      marginChar - Any character that serves as margin delimiter
      Returns:
      the stripped CharSequence
      Since:
      1.8.2
      See Also:
    • stripMargin

      @Deprecated public static String stripMargin(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • stripMargin

      @Deprecated public static String stripMargin(String self, char marginChar)
      Deprecated.
      Use the CharSequence version
      See Also:
    • stripMargin

      @Deprecated public static String stripMargin(String self, String marginChar)
      Deprecated.
      Use the CharSequence version
      See Also:
    • take

      public static CharSequence take(CharSequence self, int num)
      Returns the first num elements from this CharSequence.
       def text = "Groovy"
       assert text.take( 0 ) == ''
       assert text.take( 2 ) == 'Gr'
       assert text.take( 7 ) == 'Groovy'
       
      Parameters:
      self - the original CharSequence
      num - the number of chars to take from this CharSequence
      Returns:
      a CharSequence consisting of the first num chars, or else the whole CharSequence if it has less then num elements.
      Since:
      1.8.1
    • take

      public static String take(GString self, int num)
      A GString variant of the equivalent CharSequence method.
      Parameters:
      self - the original GString
      num - the number of chars to take from this GString
      Returns:
      a String consisting of the first num chars, or else the whole GString if it has less then num elements.
      Since:
      2.3.7
    • takeWhile

      public static CharSequence takeWhile(CharSequence self, Closure condition)
      Returns the longest prefix of this CharSequence where each element passed to the given closure evaluates to true.

       def text = "Groovy"
       assert text.takeWhile{ it < 'A' } == ''
       assert text.takeWhile{ it < 'Z' } == 'G'
       assert text.takeWhile{ it != 'v' } == 'Groo'
       assert text.takeWhile{ it < 'z' } == 'Groovy'
       
      Parameters:
      self - the original CharSequence
      condition - the closure that must evaluate to true to continue taking elements
      Returns:
      a prefix of elements in the CharSequence where each element passed to the given closure evaluates to true
      Since:
      2.0.0
    • takeWhile

      public static String takeWhile(GString self, Closure condition)
      A GString variant of the equivalent GString method.
      Parameters:
      self - the original GString
      condition - the closure that must evaluate to true to continue taking elements
      Returns:
      a prefix of elements in the GString where each element passed to the given closure evaluates to true
      Since:
      2.3.7
    • toBigDecimal

      public static BigDecimal toBigDecimal(CharSequence self)
      Parse a CharSequence into a BigDecimal
      Parameters:
      self - a CharSequence
      Returns:
      a BigDecimal
      Since:
      1.8.2
      See Also:
    • toBigDecimal

      @Deprecated public static BigDecimal toBigDecimal(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • toBigInteger

      public static BigInteger toBigInteger(CharSequence self)
      Parse a CharSequence into a BigInteger
      Parameters:
      self - a CharSequence
      Returns:
      a BigInteger
      Since:
      1.8.2
      See Also:
    • toBigInteger

      @Deprecated public static BigInteger toBigInteger(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • toBoolean

      public static Boolean toBoolean(String self)
      Converts the given string into a Boolean object. If the trimmed string is "true", "y" or "1" (ignoring case) then the result is true otherwise it is false.
      Parameters:
      self - a String
      Returns:
      The Boolean value
      Since:
      1.0
    • toCharacter

      public static Character toCharacter(String self)
      Converts the given string into a Character object using the first character in the string.
      Parameters:
      self - a String
      Returns:
      the first Character
      Since:
      1.0
    • toDouble

      public static Double toDouble(CharSequence self)
      Parse a CharSequence into a Double
      Parameters:
      self - a CharSequence
      Returns:
      a Double
      Since:
      1.8.2
      See Also:
    • toDouble

      @Deprecated public static Double toDouble(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • toFloat

      public static Float toFloat(CharSequence self)
      Parse a CharSequence into a Float
      Parameters:
      self - a CharSequence
      Returns:
      a Float
      Since:
      1.8.2
      See Also:
    • toFloat

      @Deprecated public static Float toFloat(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • toInteger

      public static Integer toInteger(CharSequence self)
      Parse a CharSequence into an Integer
      Parameters:
      self - a CharSequence
      Returns:
      an Integer
      Since:
      1.8.2
    • toInteger

      @Deprecated public static Integer toInteger(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • tokenize

      public static List<String> tokenize(CharSequence self)
      Tokenize a CharSequence (with a whitespace as the delimiter).
      Parameters:
      self - a CharSequence
      Returns:
      a List of tokens
      Since:
      1.8.2
      See Also:
    • tokenize

      public static List<String> tokenize(CharSequence self, Character delimiter)
      Tokenize a CharSequence based on the given character delimiter. For example:
       char pathSep = ':'
       assert "/tmp:/usr".tokenize(pathSep) == ["/tmp", "/usr"]
       
      Parameters:
      self - a CharSequence
      delimiter - the delimiter
      Returns:
      a List of tokens
      Since:
      1.8.2
      See Also:
    • tokenize

      public static List<String> tokenize(CharSequence self, CharSequence delimiters)
      Tokenize a CharSequence based on the given CharSequence. Each character in the CharSequence is a separate delimiter.
      Parameters:
      self - a CharSequence
      delimiters - the delimiters
      Returns:
      a List of tokens
      Since:
      1.8.2
      See Also:
    • tokenize

      @Deprecated public static List<String> tokenize(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • tokenize

      @Deprecated public static List<String> tokenize(String self, Character delimiter)
      Deprecated.
      Use the CharSequence version
      See Also:
    • tokenize

      @Deprecated public static List<String> tokenize(String self, String delimiters)
      Deprecated.
      Use the CharSequence version
      See Also:
    • toList

      public static List<String> toList(CharSequence self)
      Converts the given CharSequence into a List of Strings of one character.
      Parameters:
      self - a CharSequence
      Returns:
      a List of characters (a 1-character String)
      Since:
      1.8.2
      See Also:
    • toList

      @Deprecated public static List<String> toList(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • toLong

      public static Long toLong(CharSequence self)
      Parse a CharSequence into a Long
      Parameters:
      self - a CharSequence
      Returns:
      a Long
      Since:
      1.8.2
      See Also:
    • toLong

      @Deprecated public static Long toLong(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • toSet

      public static Set<String> toSet(CharSequence self)
      Converts the given CharSequence into a Set of unique Strings of one character.
      Parameters:
      self - a CharSequence
      Returns:
      a Set of unique characters (each a 1-character String)
      Since:
      1.8.2
      See Also:
    • toSet

      @Deprecated public static Set<String> toSet(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • toShort

      public static Short toShort(CharSequence self)
      Parse a CharSequence into a Short
      Parameters:
      self - a CharSequence
      Returns:
      a Short
      Since:
      1.8.2
    • toShort

      @Deprecated public static Short toShort(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • tr

      public static String tr(CharSequence self, CharSequence sourceSet, CharSequence replacementSet) throws ClassNotFoundException
      Translates a CharSequence by replacing characters from the sourceSet with characters from replacementSet. If the first character from sourceSet appears in the CharSequence, it will be replaced with the first character from replacementSet. If the second character from sourceSet appears in the CharSequence, it will be replaced with the second character from replacementSet. and so on for all provided replacement characters.

      Here is an example which converts the vowels in a word from lower to uppercase:

       assert 'hello'.tr('aeiou', 'AEIOU') == 'hEllO'
       
      A character range using regex-style syntax can also be used, e.g. here is an example which converts a word from lower to uppercase:
       assert 'hello'.tr('a-z', 'A-Z') == 'HELLO'
       
      Hyphens at the start or end of sourceSet or replacementSet are treated as normal hyphens and are not considered to be part of a range specification. Similarly, a hyphen immediately after an earlier range is treated as a normal hyphen. So, '-x', 'x-' have no ranges while 'a-c-e' has the range 'a-c' plus the '-' character plus the 'e' character.

      Unlike the unix tr command, Groovy's tr command supports reverse ranges, e.g.:

       assert 'hello'.tr('z-a', 'Z-A') == 'HELLO'
       
      If replacementSet is smaller than sourceSet, then the last character from replacementSet is used as the replacement for all remaining source characters as shown here:
       assert 'Hello World!'.tr('a-z', 'A') == 'HAAAA WAAAA!'
       
      If sourceSet contains repeated characters, the last specified replacement is used as shown here:
       assert 'Hello World!'.tr('lloo', '1234') == 'He224 W4r2d!'
       
      The functionality provided by tr can be achieved using regular expressions but tr provides a much more compact notation and efficient implementation for certain scenarios.
      Parameters:
      self - the CharSequence that is to be translated
      sourceSet - the set of characters to translate from
      replacementSet - the set of replacement characters
      Returns:
      The resulting translated String
      Throws:
      ClassNotFoundException
      Since:
      1.8.2
      See Also:
      • StringUtil.tr(String, String, String)
    • tr

      @Deprecated public static String tr(String self, String sourceSet, String replacementSet) throws ClassNotFoundException
      Deprecated.
      Use the CharSequence version
      Throws:
      ClassNotFoundException
      See Also:
    • unexpand

      public static String unexpand(CharSequence self)
      Replaces sequences of whitespaces with tabs using tabStops of size 8.
      Parameters:
      self - A CharSequence to unexpand
      Returns:
      an unexpanded String
      Since:
      1.8.2
      See Also:
    • unexpand

      public static String unexpand(CharSequence self, int tabStop)
      Replaces sequences of whitespaces with tabs.
      Parameters:
      self - A CharSequence to unexpand
      tabStop - The number of spaces a tab represents
      Returns:
      an unexpanded String
      Since:
      1.8.2
    • unexpand

      @Deprecated public static String unexpand(String self)
      Deprecated.
      Use the CharSequence version
      See Also:
    • unexpand

      @Deprecated public static String unexpand(String self, int tabStop)
      Deprecated.
      Use the CharSequence version
      See Also:
    • unexpandLine

      public static String unexpandLine(CharSequence self, int tabStop)
      Replaces sequences of whitespaces with tabs within a line.
      Parameters:
      self - A line to unexpand
      tabStop - The number of spaces a tab represents
      Returns:
      an unexpanded String
      Since:
      1.8.2
    • unexpandLine

      @Deprecated public static String unexpandLine(String self, int tabStop)
      Deprecated.
      Use the CharSequence version
      See Also:
    • startsWithAny

      public static boolean startsWithAny(CharSequence self, CharSequence... prefixes)
      Tests if this CharSequence starts with any specified prefixes.
      Parameters:
      prefixes - the prefixes.
      Returns:
      true if this CharSequence starts with any specified prefixes.
      Since:
      2.4.14
    • endsWithAny

      public static boolean endsWithAny(CharSequence self, CharSequence... suffixes)
      Tests if this CharSequence ends with any specified suffixes.
      Parameters:
      suffixes - the suffixes.
      Returns:
      true if this CharSequence ends with any specified suffixes
      Since:
      2.4.14