Method Array.uniq()

Method uniq: array uniq(array a)
Description: Remove elements that are duplicates.
Returns: This function returns an copy of the array a with all duplicate values removed. The order of the values is kept in the result; it's always the first of several equal elements that is kept.
Note: Elements are compared with `== . They are also hashed (see lfun::__hash for further details if the array contains objects).