NAME

Getopt::EX::Numbers - module to handle number parameters

SYNOPSIS

use Getopt::EX::Numbers;

my $obj = Getopt::EX::Numbers->new(max => 100);

$obj->parse("start:end:step:length"); $obj->range;

$obj->parse("start:end:step:length")->sequence;

Getopt::EX::Numbers->new->parse("1:10:2")->sequence;

FORMAT

Number format is composed by four elements: "start", "end", "step" and "length". All elements are optional.

    1           1
    1:3         1,2,3
    1:20:5      1,     6,     11,       16
    1:20:5:3    1,2,3, 6,7,8, 11,12,13, 16,17,18

When "start" is omitted, minimum value is used, which is zero by default. If the object is initialized with "max" value, "end" element can be omitted.

    ::          all
    ::2         even numbers
    1::2        odd numbers

If "start" and "end" number is negative, they are subtracted from the maximum number. If the "end" number is prefixed by plus (`+') sign, it is summed to "start" number. Next examples produce top and last 10 numbers.

    :+9         top 10 numbers
    -9:         last 10 numbers

METHOD

new ( [ min => n ] , [ max => m ] )

Create object with optional parameter min and max.

parse(spec)

Accept number description and parse it. Return object itself.

range

Return number range list:

    ( [ n0, m0 ], [ n1, m1 ], ... )

sequence

Return number sequence:

    ( n0 .. m0, n1 .. m1, ... )