G'day dnamonk,

Code:

#!/usr/bin/env perl

use strict;
use warnings;

my @tests = (
    [qw{ABCGE ABCGE}],
    [qw{ABCGE FGCGB}],
    [qw{ABCGE JHAGT}],
);

for my $strings (@tests) {
    my $diff = 0;

    for my $i (0 .. length($strings->[0]) - 1) {
        my @chars = map substr($strings->[$_], $i, 1), 0, 1;
        ++$diff if $chars[0] ne $chars[1];
    }

    print "@$strings $diff\n";
}

[download]

Output:

ABCGE ABCGE 0
ABCGE FGCGB 3
ABCGE JHAGT 4

[download]

You've received a number of solutions; use Benchmark to see which is the most efficient. From your username, I'm guessing you're dealing with biological data: typically huge and efficiency is usually important.

— Ken

In reply to Re: Comparing string characters by kcott
in thread Comparing string characters by dnamonk

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