In the years since I've written this, UNIVERSAL::isa has been written. Use that instead.

No, you'd have to say it as isa( $date, 'ARRAY' ). The documentation for UNIVERSAL says to import isa() before using it so here's the proper way. By using isa() you've just allowed your users to bless their arrays before giving them to you. When you check ref() you impose a no-blessings and no-subclassing requirement which really isn't all that friendly or perlish.

*isa = \&UNIVERSAL::isa;

sub foo {
    my $date = shift;
    return unless isa( $date, 'ARRAY' );
    bar( $date );
}

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In reply to Re: Is "ref $date eq 'ARRAY'" wrong? by diotalevi
in thread Is "ref $date eq 'ARRAY'" wrong? by bronto

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