G'day silentq,

Welcome to the monastery.

Extending ++Kenosis' excellent idea of using glob, here's a solution for variable rows and columns. 

#!/usr/bin/env perl

use 5.010;
use strict;
use warnings;

say for glob '{' . join('}-{' => map { join ',' => split } <DATA>) . '
+}';

__DATA__
1 2
3 4 5
6 7
8 9

[download]

Output:

$ pm_2d_comb.pl
1-3-6-8
1-3-6-9
1-3-7-8
1-3-7-9
1-4-6-8
1-4-6-9
1-4-7-8
1-4-7-9
1-5-6-8
1-5-6-9
1-5-7-8
1-5-7-9
2-3-6-8
2-3-6-9
2-3-7-8
2-3-7-9
2-4-6-8
2-4-6-9
2-4-7-8
2-4-7-9
2-5-6-8
2-5-6-9
2-5-7-8
2-5-7-9

[download]

-- Ken

In reply to Re^3: sending a scalar to the interpreter as a command by kcott
in thread sending a scalar to the interpreter as a command by silentq

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