Re: setting hash keys by array

How about something like this?

#!/usr/bin/perl -w
use strict;
use Data::Dumper;

my @ary = qw(red green brown);
my %hash = ();

eval '$hash{' . join('}{',@ary) . '}++;';

print Dumper(\%hash);
[download]

That prints:

$VAR1 = {
          'red' => {
                     'green' => {
                                  'brown' => '1'
                                }
                   }
        };
[download]

Cheers,
Shendal

Comment on Re: setting hash keys by array Select or Download Code

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Re: Re: setting hash keys by array by suaveant (Parson) on Sep 09, 2002 at 18:04 UTC
This is probably not a great way to do it... not only is it inefficient and open to syntax errors (i.e. a key of ';}' would be bad), but if this was something that used user input it could be a security hole... ( @ary = '},`rm -rf /`,{' ) eval is usually best used as a last resort and for exception handling (though this is usually with existing written code) - Ant - Some of my best work - (1 2 3)	[reply]