! Aware to Perl: isa(CLASS)

isa(CLASS)

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isa(CLASS)

isa returns true if its object is blessed into a subclass of CLASS

isa is also exportable and can be called as a sub with two arguments. This allows the ability to check what a reference points to. Example:

    use UNIVERSAL qw(isa);

    if(isa($ref, 'ARRAY')) {
       ...
    }

Source: what's new for perl5.004
Copyright: Larry Wall, et al.

(Corrections, notes, and links courtesy of RocketAware.com)

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