This was a fun one. Here's a non-golfy solution I quite like, despite its assumptions.

#!/usr/bin/perl -w

use strict;
use Test::More tests => 1;

my @list = qw( 1 2 3 4 5 6a 6b 6c 6d 6e 7 10 11 12 13 );

chomp( my $range = <DATA> );

my @result = split_list( $range );
is_deeply( \@result, \@list );

sub split_list
{
    my $range  = shift;

    my @list;
    for my $r ( split( /,/, $range ) )
    {
        my $iter = get_points( $r );

        while (my $next = $iter->())
        {
            push @list, $next;
        }
    }

    return @list;
}

sub get_points
{
    my $range         = shift;
    my ($start, $end) = split( /\-/, $range );

    return iter_int($start, $end) unless $start =~ /\D/;

    my ($number, $letter) = $start =~ /^(\d+)(\D)$/;
    return iter_str( $number, $letter, $number . $end );
}

sub iter_int
{
    my ($start, $end) = @_;
    $end ||= $start;

    return sub
    {
        return if $start > $end;
        return $start++;
    };
}

sub iter_str
{
    my ($start, $letter, $end) = @_;

    my $last = '';
    return sub
    {
        return if $last eq $end;
        my $next = $start . $letter;
        $last    = $start . $letter++;
        return $next;
    };
}

__DATA__
1-5,6a-e,7,10-13

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In reply to Re: need help to split list by chromatic
in thread need help to split list by bfdi533

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