This sounds like a great programming exercise while I drink my morning coffee... 

#!/usr/bin/perl

use strict;
use warnings;

my $string = '2raccoon49-racing';
my @tests = qw(Winnie Pooh racat Bats xyz35 Barack ccoons acc 2ra);

print "\n\nOur search string is : \"$string\"\n\nMinimum number of let
+ters that must match.\n|\n|\nV";
foreach (@tests) { print "\t$_"; }
for (my $N = 1; $N < 7; $N++)
{
  print "\n$N";
  foreach (@tests)
  {
    print "\t", PartialMatchStr($string, $_, $N);
  }
}
print "\n\n";

##################################################
# This function performs a partial match and returns 1
# if at least N bytes of string1 and string2 match
# anywhere. Returns zero otherwise.
#
# Usage: INTEGER = PartialMatchStr(STR1, STR2, N)
#
sub PartialMatchStr
{
  @_ > 2 or return 0;
  foreach (@_) { defined $_ or return 0; }
  my $N = $_[2];
  my $L = length($_[1]) - $N;
  if (length($_[0]) < $N || $L < 0) { return 0; }  # Impossible
  for (my $i = 0; $i <= $L; $i++)
  {
    # Take one segment from STR1 and find it within STR2.
    if ( index($_[0],   substr($_[1], $i, $N)   ) >= 0) { return 1; }
  }
  return 0;
}
##################################################

[download]

In reply to Re: Finding a partial match by harangzsolt33
in thread Finding a partial match by jpys

Title:
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, details, 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, summary, 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.