Beefy Boxes and Bandwidth Generously Provided by pair Networks
Your skill will accomplish
what the force of many cannot

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
In the spirit of TIMTOWTDI, here's my solution.

For n items there are 2^n combinations. Create a binary string for each combination number. Check each digit of the binary string to determine if the corresponding item gets printed.


#!/usr/bin/perl use strict; my (@list) = qw(one two three four); printcombo(\@list); #----------------------------------------------------------- sub printcombo { my ($list) = @_; my (@print, $str, $i, $j); my $size = @{$list}; for ($i = 0; $i < 2**$size; $i++) { $str = sprintf("%*.*b", $size, $size, $i); @print = (); for ($j = 0; $j < $size; $j++) { if (substr($str, $j, 1)) { push (@print, $list->[$j]); } } print join(' ', @print) . "\n"; } }

In reply to Re: printing all combinations of an array.. by YuckFoo
in thread printing all combinations of an array.. by Anonymous Monk

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?

    What's my password?
    Create A New User
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others lurking in the Monastery: (8)
    As of 2019-12-12 23:56 GMT
    Find Nodes?
      Voting Booth?

      No recent polls found