G'day Hossein,

Here's my take on a solution. It involves no guesswork; doesn't require filenames to be of the same length; and preserves the suffixes (which don't need to be the same or, in fact, even present). It only checks for common parts at the beginning and end of the filename: it won't try to remove any common strings from the middle. 

#!/usr/bin/env perl -l

use strict;
use warnings;

use File::Basename;

my @paths = qw{hhk_1sss-(hello).txt hhk_2abc-(hello).txt hhk_3xyz-(hel
+lo).txt};
my @split_paths = map { [ fileparse($_ => qr{[.]?[^.]*}) ] } @paths;
my @names = map { $split_paths[$_][0] } 0 .. $#split_paths;
my $common_start = get_common(@names);
my $common_end = reverse get_common(map { scalar reverse } @names);

for (@split_paths) {
    print +($_->[0] =~ /^\Q$common_start\E(.*)\Q$common_end\E$/)[0], $
+_->[2];
}

sub get_common {
    my ($control, $compare, @rest) = @_;
    my $common = '';
    my ($control_len, $compare_len) = map { length } $control, $compar
+e;

    for (0 .. ($control_len < $compare_len ? $control_len : $compare_l
+en) - 1) {
        my $control_char = substr $control, $_, 1;
        last if $control_char ne substr $compare, $_, 1;
        $common .= $control_char;
    }

    return @rest ? get_common($common, @rest) : $common;
}

[download]

Sample run:

$ pm_ex_same_strings.pl
1sss.txt
2abc.txt
3xyz.txt

[download]

If you want to use pathnames with directories, just change "print +(..." to "print $_->[1], (...".

-- Ken

In reply to Re: how to guess mutual (f)phrases? by kcott
in thread how to guess mutual frases? by Hossein

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