Since the commands are in a regular pattern, you could do this:

use strict;
use warnings;
use Data::Dumper;

my @array = (
    "create", "mount", "remove", "create", "mount", "remove",
    "create", "mount", "remove", "create", "mount", "remove",
    "create", "mount", "remove", "create", "mount", "remove",
    "create", "mount", "remove", "create", "mount", "remove",
    "create", "mount", "remove", "create", "mount", "remove",
    "create", "mount", "remove", "create", "mount", "remove",
    "create", "mount", "remove", "create", "mount", "remove",
    "create", "mount", "remove", "create", "mount", "remove",
    "create", "mount", "remove", "create", "mount", "remove",
    "create", "mount", "remove", "create", "mount", "remove"
);

my @newArray;

while ( my @tmp = splice @array, 0, 3 ) {
    push @newArray, @tmp, 'newelement';
}

print Dumper \@newArray

[download]

Partial output:

$VAR1 = [
          'create',
          'mount',
          'remove',
          'newelement',
          'create',
          'mount',
          'remove',
          'newelement',
          'create',
          'mount',
          'remove',
          'newelement',
...

[download]

Hope this helps!

In reply to Re: Adding an new element after every 5th element in array by Kenosis
in thread Adding an new element after every 5th element in array by dvinay

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