// is the defined-or operator. If the left part is undefined, take the right part else take the left part.

my $c = $a // $b;

[download]

Is like

my $c = defined $a ? $a : $b;

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but easier and chainable

my $x = $a // function ($b) // $ENV{FOO} // $self->bar // 0;

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Enjoy, Have FUN! H.Merijn

In reply to Re^3: Perl/Tk binding Tab by Tux
in thread Perl/Tk binding Tab by Anonymous Monk

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