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Re^5: I need to insert spaces and get the values for all the variables

by hdb (Parson)
on Sep 04, 2013 at 09:26 UTC ( #1052268=note: print w/ replies, xml ) Need Help??

Comment on Re^5: I need to insert spaces and get the values for all the variables
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Re^6: I need to insert spaces and get the values for all the variables
by Eily (Hermit) on Sep 04, 2013 at 12:23 UTC

    Oh, right. I knew about autovivification already, but since @array = @{ $hash{key} } (when %hash is empty) is an error under strict I thought that push @{ $hash{key} }, 'value' would be too. But I forgot that Perl is smarter than me.

    I'm working on v5.8.3 here, so I can't test that right now, but I suppose that in the case of mypush(+@) you'd still get an error.

    Thanks for correcting me :) (Edit: as in making me learn a bit about Perl)

    Edit: oh wait, I don't need the + prototype to try that (I guess someone's tired, and that someone is sitting on my very chair):

    use strict; use warnings; use Data::Dumper; sub mypush(\@@) { push @{ shift; }, @_ } my %hash; mypush @{ $hash{key} }, "Hello", "World"; print Dumper \%hash;
    $VAR1 = { 'key' => [ 'Hello', 'World' ] };
    So it works alright. I really should trust Perl more. Edit: The linux computer to which I'm connected via SSH uses v5.14.2. It works just fine with + as well.

      There is no intention on my side to do any correcting, especially as your code is working Perl code and probably even easier to understand than the shorter form.

      I just wanted to point out that some typing could be safed if you wanted.

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