hi

Party of the first part? Smart quotes snuck in your post;)

compare to yours, what did i change?

use strict;
use warnings;
my @input = ( -222, -221, -21, 0, 1,
 1, 2, 3, 5, 8, 13, 21, 
34, 55, 89, 144 );
print $_, " " for oddDigitSum(@input);
print "\n";
exit 0;

sub oddDigitSum {
    my @ans;
    for my $int (@_) {
        my @digits = split //, abs $int;
        my $sum = 0;
        $sum += $_ for @digits;
        $sum % 2 and push @ans, $int;
    }
    return @ans;
}
[download]

compare to yours, and mine, what did i change?

use strict;
use warnings;
my @input = ( -222, -221, -21, 0, 1,
 1, 2, 3, 5, 8, 13, 21, 
34, 55, 89, 144 );
print $_, " " for oddDigitSum(@input);
print "\n";
exit 0;

sub oddDigitSum {
    my @ans;
    for my $int (@_) {
        my $sum = 0;
        $sum += $_ for split //, abs $int;;
        $sum % 2 and push @ans, $int;
    }
    return @ans;
}
[download]

compare to yours, and mine, and mine, what did i change? Is it better? Simpler? Clearer? New and unfamiliar? Ambiguous? Faster?

use strict;
use warnings;
my @input = ( -222, -221, -21, 0, 1,
 1, 2, 3, 5, 8, 13, 21, 
34, 55, 89, 144 );
print $_, " " for oddDigitSum(@input);
print "\n";
exit 0;

sub oddDigitSum {
    my @ans;
    for my $int (@_) {
        my $sum = Summ(
split //, abs $int );;
        $sum % 2 and push @ans, $int;
    }
     @ans;
}
sub Summ {
  my $sum = 0;
  $sum+=$_ for @_;
  $sum;
}
[download]

I'm typing this on my phone. Seent map yet? I've seent it :) is it ...?

use strict;
use warnings;
my @input = ( -222, -221, -21, 0, 1,
 1, 2, 3, 5, 8, 13, 21, 
34, 55, 89, 144 );
print $_, " " for oddDigitSum(@input);
print "\n";
exit 0;

sub oddDigitSum {
    my @ans = map {
        my $sum = Summ(
split //, abs $_ );;
        $sum % 2 
        ? $_ # keep oddities
        : () ;
    } @_;
     @ans;
}
sub Summ {
  my $sum = 0;
  $sum+=$_ for @_;
  $sum;
}
[download]

I'm typing this on my phone. Seent map yet? I've seent it :) is it ...?

use strict;
use warnings;
my @input = ( -222, -221, -21, 0, 1,
 1, 2, 3, 5, 8, 13, 21, 
34, 55, 89, 144 );
print $_, " " for oddDigitSum(@input);
print "\n";
exit 0;

sub oddDigitSum {
    map {
         my $sum = 0;
         $sum+=$_
            for split //, abs $_ ;;
        $sum % 2 
        ? $_ # keep oddities
        : () ;
    } @_;
}
[download]

im sleepy

there is discussion of things like this, but I'm away from my keyboard and my links, so these search terms are a reminder to me to follow up on this question

on Naming variables use $_....define best, what best, readability, idiomatic, modern Perl, local $_, reuse var