Following up from this thread and this post in particular, I decided to construct what I consider to be a fairly general solution to step through an array - The code below differs from some of the solutions in the referenced thread in that the array elements being stepped through do not necessarily need to be numeric, stepping based upon array index rather than array elements.

The syntax of this command is quite simply - step <step>, <array> - where <step> is the step value and <array> is the array to iterate through.

#!/usr/bin/perl -Tw

use strict;

sub step {
    my $step = shift;
    return map { $_[$_] } grep { $_ % $step == 0 } 0..$#_;
}

my @array = ( 'a' .. 'z' );

print join( ' ', step( 5, @array ) ), "\n";

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In reply to Stepping through an array by rob_au

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