Fellow monasterians,

I'm a little embarrassed to be this far into monkdom and still not understanding mapping (and grepping for that matter). I'm trying to alter a specific key's value in a AoH ref. I tried mapping a simple array and no problem. But I get the feeling I'm missing something really important as I'm getting zero results with my latter expressions.

#I get this
my @array = qw(aaa-aaa bbb-bbb ccc-ccc);
my @newarray = map { $_ =~ s/-/_/g } @array;
print Dumper(@array);

my $AoH_orig = [ { 'title' => 'aaa-aaa',
                   'name'  => 'tom' },
                 { 'title' => 'bbb-bbb',
                   'name'  => 'kathy' },
                 { 'title' => 'ccc-ccc',
                   'name'  => 'bill' } 
                 ];

# how i would do it "long hand"            
for ( 0 .. $#$AoH_orig ) {
    $AoH_orig->[$_]{'title'} =~ s/-/_/g;
}

#try mapping
my $AoH_new = map { $AoH_orig->[$_]{'title'} =~ s/-/_/g } @$AoH_orig;
 #or 
my $AoH_new = map { $_->{'title'} =~ s/-/_/g } @$AoH_orig; 
 
print Dumper($AoH_orig);

[download]

Comments? or can you point me to a good tutorial? Thanks in advance.

Update: I guess I was using map when I should have just been using the good olde foreach. But, hey, I'm a lot closer to getting it with everyone's help. Thanks.


—Brad
"The important work of moving the world forward does not wait to be done by perfect men." George Eliot

In reply to Basic help with mapping by bradcathey

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