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Re: Returning two lists from a sub

by jynx (Priest)
on Jun 07, 2007 at 17:45 UTC ( #619865=note: print w/ replies, xml ) Need Help??


in reply to Returning two lists from a sub

I'm not surprised no one has mentioned this one. This is pretty horrible as well. Make the 2 lists have the same size, and then return a hash where the keys are one list and the values are another. Then you can extract both lists from the single list using perl built-ins. I would advise not doing it this way. But just for fun, untested code ahead...

sub foo { my ($tmp, @list1, @list2, %vals) = ('aaaaa'); @list1 = generate_list1(); @list2 = generate_list2(); if (@list1 > @list2) { push @list2, $tmp++ for 1..@list1-@list2; } else { push @list1, $tmp++ for 1..@list2-@list1; } @vals{@list1} = @list2; return %vals; } my %tmp = foo(); my @list1 = sort grep !/^aaa/, keys %tmp; my @list2 = sort grep !/^aaa/, values %tmp;


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Re^2: Returning two lists from a sub
by kyle (Abbot) on Jun 07, 2007 at 17:49 UTC

    This method would fail if the list used as 'keys' has any duplicate items in it.

      That's one of many problems with it, which is why I did advise not to use it. I just put it here in the spirit of TMTOWTDI and for fun. It's not supposed to be a "serious" way to do it...

      This was a bad time for a joke apparently... sorry about that.

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