Beefy Boxes and Bandwidth Generously Provided by pair Networks
Think about Loose Coupling

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??
Well, I can make a ruleset that seems to fit:
  1. Always keep the first two numbers intact
  2. If any zeros start at position 3, remove them all.
  3. If you didn't do that, then if two or more zeros start after position 3, truncate them to a single 0
  4. If you didn't do either of the first two techniques, then remove a single 0 starting at position 3 or later entirely.

What happens if a single 0 starts at position 3? What does '35010333356' turn into?

Here's my code:
#!/usr/bin/perl use strict; use warnings; use Test::More; my %output_for = ( '215000007801' => '21507801', '300000324002' => '30324002', '890000457651' => '89457651', '210004563401' => '214563401', '201045139158' => '20145139158', ); plan tests => scalar keys %output_for; while ( my ($input, $correct_output) = each %output_for ) { my $orig_input = $input; $input = &compress_numstring( $input ); is( $input, $correct_output, "Solved '$orig_input'" ); } sub compress_numstring { my $starting_num = shift; return $starting_num unless(defined $starting_num && $starting_num =~ /^(\d{2})(\d+)/); my( $keep, $modify ) = ($1,$2); ( $modify =~ s/^0+// ) || ( $modify =~ s/0{2,}/0/ ) || ( $modify =~ s/(?<!0)0([1-9]|$)/$1/ ); return $keep . $modify; }
It passes the validation test, but it may fail further tests since the rules aren't clearly spelled out.

In reply to Re: Stuck in komplexer regex, at least for me by saintly
in thread Stuck in komplexer regex, at least for me by ultibuzz

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!
  • 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
  • Outside of code tags, you may need to use entities for some characters:
            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 perusing the Monastery: (12)
    As of 2015-01-26 13:22 GMT
    Find Nodes?
      Voting Booth?

      My top resolution in 2015 is:

      Results (190 votes), past polls