I'm not aware of any module to do this.

I don't see how "recursion" would help you here.

There's no need for an "ugly" loop. Just iterate your array; use a boolean flag to indicate if elements are in the wanted group. 

#!/usr/bin/env perl -l

use strict;
use warnings;

my @dd = qw/AA JJ CC M 1 1 3 4 D JJ 1 1 D M 3 3 4 D C M 3 3 3 D P Z/;

my $in_group = 0;
my (@group, @all_groups);

for (@dd) {
    $in_group = 1 if $_ eq 'M';

    next unless $in_group;

    push @group, $_;

    if ($_ eq 'D') {
        push @all_groups, [ @group ];
        @group = ();
        $in_group = 0;
    }
}

print "@$_" for @all_groups;

[download]

Output:

M 1 1 3 4 D
M 3 3 4 D
M 3 3 3 D

[download]

— Ken

In reply to Re: how extract and group data in a array by kcott
in thread how extract and group data in a array by Anonymous Monk

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