`-()

`->=()

Method `->()

Method `->

mixed `->(object arg, string index)
mixed `->(int arg, string index)
mixed `->(array arg, string index)
mixed `->(mapping arg, string index)
int(0..1) `->(multiset arg, string index)
mixed `->(program arg, string index)

Description

Arrow index operator.

This function behaves much like `[], just that the index is always a string.

Returns

If arg is an object that implements lfun::`->(), that function will be called with index as the single argument.

Otherwise the result will be as follows:

arg can have any of the following types:

object The non-static (ie public) symbol named index will be looked up in arg. int The bignum function named index will be looked up in arg. array An array of all elements in arg arrow indexed with index will be returned. mapping If index exists in arg the corresponding value will be returned. Otherwise UNDEFINED will be returned. multiset If index exists in arg, 1 will be returned. Otherwise UNDEFINED will be returned. program The non-static (ie public) constant symbol index will be looked up in arg.

See also

`[], lfun::`->(), ::`->()