The snippet uses Math::Combinatorics module. Given a set of characters as an array. It returns all the possible combinations of the characters ranging from 1 character to total size of the array.
Update: Data::Dumper included. Thanks to zentara.
#!/usr/bin/perl -w
use strict;
use Data::Dumper;
my @n = ('A' .. 'C');
my @all_string = get_char_comb(@n);
print "There are: ",scalar(@all_string)," strings\n";
print Dumper \@all_string;
sub get_char_comb
{
use Math::Combinatorics;
my @alph = @_;
my @all;
foreach ( 0 .. $#alph+1 )
{
my $combinat = Math::Combinatorics->new( count => $_,
data => [@alph],
);
while(my @permu = $combinat->next_combination)
{
push @all, join("",@permu);
}
}
return @all;
}
Output:
$VAR1 = [
'A',
'B',
'C',
'AB',
'AC',
'BC',
'ABC'
];
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.