Is there a Perl module for parsing numbers, including ranges? - perl

Question

Is there a module, which does this for me?
sample_input: 2, 5-7, 9, 3, 11-14
#!/usr/bin/env perl
use warnings; use strict; use 5.012;
sub aw_parse {
my( $in, $max ) = #_;
chomp $in;
my #array = split ( /\s*,\s*/, $in );
my %zahlen;
for ( #array ) {
if ( /^\s*(\d+)\s*$/ ) {
$zahlen{$1}++;
}
elsif ( /^\s*(\d+)\s*-\s*(\d+)\s*$/ ) {
die "'$1-$2' not a valid input $!" if $1 >= $2;
for ( $1 .. $2 ) {
$zahlen{$_}++;
}
} else {
die "'$_' not a valid input $!";
}
}
#array = sort { $a <=> $b } keys ( %zahlen );
if ( defined $max ) {
for ( #array ) {
die "Input '0' not allowed $!" if $_ == 0;
die "Input ($_) greater than $max not allowed $!" if $_ > $max;
}
}
return \#array;
}
my $max = 20;
print "Input (max $max): ";
my $in = <>;
my $out = aw_parse( $in, $max );
say "#$out";

Answer 1

A CPAN search for number range gives me this, which looks pretty much like what you're looking for:
Number::Range
Here's an example of how you can use the module in your aw_parse function:
$in =~ s/\s+//g; # remove spaces
$in =~ s/(?<=\d)-/../g; # replace - with ..
my $range = new Number::Range($in); # create the range
my #array = sort { $a <=> $b } $range->range; # get an array of numbers
Applied to the sample from the question:
Input (max 20): 2, 5-7, 9, 3, 11-14
2 3 5 6 7 9 11 12 13 14