Hi hankcoder,

Yes, that's essentially what it means - next unless $cell; does the same as unless($cell) {next}, and unless is just an if with the condition inverted, as in if (not ...) .... This is covered in Compound Statements and Statement Modifiers.

Another way to write that is $cell or next; which means that if $cell has a true value, the or expression will be true, so it "short-circuits" and does not need to execute the right hand side, next. If $cell is false, the or needs to check its right argument for truth, so the next is executed.

You can see this equivalence yourself with B::Deparse:

$ perl -MO=Deparse,-p -e 'next unless $cell'
($cell or (next));

[download]

Hope that helps,
-- Hauke D

In reply to Re: next unless condition by haukex
in thread next unless condition by hankcoder

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