http://www.perlmonks.org?node_id=724707


in reply to ColorRamp1785

my @map = sort{ $a <=> $::b } keys %map;

Why bother using $::b? I thought it was just shorthand for $main::b (and $::main::b and so on :P).

I'm so adjective, I verb nouns!

chomp; # nom nom nom

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Re^2: ColorRamp1785
by BrowserUk (Patriarch) on Nov 19, 2008 at 20:26 UTC

    Because I'm using my $b for one of the rgb triple, and without the ::, perl will see that and attempt to use it instead of $::b, and fail with Can't use "my $b" in sort comparison. I guess I should have used $::a for balance--and now have.

    Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
    "Science is about questioning the status quo. Questioning authority".
    In the absence of evidence, opinion is indistinguishable from prejudice.
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      Oh, I see. Thanks for explaining it to me (",)

      (And you should update the lone subroutine at the top of the node too). Err, you did while I was posting :P

      I'm so adjective, I verb nouns!

      chomp; # nom nom nom
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In Section Cool Uses for Perl