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Method `[]=()
- Method
`[]=
mixed `[]=(object arg, mixed index, mixed val)
mixed `[]=(object arg, string index, mixed val)
mixed `[]=(array arg, int index, mixed val)
mixed `[]=(mapping arg, mixed index, mixed val)
int(0..1) `[]=(multiset arg, mixed index, int(0..1) val)
- Description
Index assignment.
Every lvalue expression with the [] operator becomes a
call to this function, i.e. a[b]=c is the same as
predef::`[]=(a,b,c) .
If arg is an object that implements lfun::`[]=() , that function
will be called with index and val as the arguments.
arg can have any of the following types:
object | The non-protected (ie public) variable named index will
be looked up in arg , and assigned val .
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array|mapping | Index index in arg will be assigned val .
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multiset | If val is 0 (zero), one occurrance of index in
arg will be removed. Otherwise index will be added
to arg if it is not already there.
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- Returns
val will be returned.
- Note
An indexing expression in a non-lvalue context, i.e. where the
index is being queried instead of assigned, uses `[] instead
of this function.
- See also
`->=() , lfun::`[]=() , `[]
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