bvulner:

Your unusual formatting makes it a bit hard to see what you're trying to do. But to merge two hashes is relatively simple:

$ cat hashmerge.pl
#!/usr/bin/perl
use strict;
use warnings;
use Data::Dumper;

my %H1 = ( apple=>1, banana=>25, lemon=>14 );
my %H2 = ( apple=>7, banana=>14, geranium=>9001 );

# To merge, just copy the first hash in, then insert selected
# values from second hash
my %merged = %H1;
for my $k (keys %H2) {
    if (exists $merged{$k}) {
        # We already have one of these.
        if ($H2{$k} < $merged{$k}) {
            # Second hash has a "better" value
            $merged{$k} = $H2{$k};
        }
    }
    else {
        # we don't have one of these yet, so add it
        $merged{$k} = $H2{$k};
    }
}

print Dumper(\%merged);

$ perl hashmerge.pl
$VAR1 = {
          'banana' => 14,
          'geranium' => 9001,
          'apple' => 1,
          'lemon' => 14
        };

[download]

...roboticus

When your only tool is a hammer, all problems look like your thumb.

In reply to Re: Merging two lists by roboticus
in thread Merging two lists by bvulner

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