Hello Monks,

I am generating disk names and need to generate a list from a to X, where X is anything from z to zz.

At the moment, I'm generating a list then taking an array slice, e.g.:

#!/usr/bin/env perl
use 5.010;
use strict;
use warnings;

my @list = "a" .. "zz";
my @disk_list = qw(foo bar baz);
my @new_list = @list[ 0 .. $#disk_list ];

map { say } @new_list;

[download]

The problem is, what if I need to go to "aaa", e.g. @disk_list is 703 long, this won't allow for that, and I think will generate an error, since @list[ 0 .. 703 ] would be out of bounds.

How can I generate a list from a to an arbitrary upper limit?

Thanks!

Acutually, the full sub is:

sub build_disk_list {
    my $self = shift;
    my $disk_names = shift;

    my @letters = 'a' .. 'zz';
    my @disk_letters = @letters[ 0 .. $#{$disk_names} ];

    my $disk_it = each_array @{$disk_names}, @disk_letters;
    my @disk_list;
    while ( my ( $disk_name, $disk_letter ) = $disk_it->() ){
        push @disk_list, [$disk_name, "vd" . $disk_letter ];
    }
    return \@disk_list;
}

[download]

Edit: ok, a slice with an out of bound index would just return an empty value, which is even worse than generating an error

Solved Edit: Thanks very much everyone. I think I can make one of these solutions work.

In reply to [Solved] Generate list from a to arbitrary letter by three18ti

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