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and the regex problem/solution was? (Score:1)

by n1vux (1492) on 2004.12.14 13:50 (#36788) Homepage Journal

So what was the problem and the solution and the explanation for why it works?

--
Bill
# I had a sig when sigs were cool
use Sig;

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- Re:and the regex problem/solution was? (Score:2)
  
  by pudge (1)
  
  It had to do with alternation and backtracking. We were matching any consecutive nonwhitespace chars, and treating HTML entities as single chars, for the purpose of counting (we were breaking up strings of $n chars) and to make sure we don't split in the middle of the entities. So something like this (simplified):
  
  $foo =~ /\G (( &\w+; | \S ){$n}) /gx;
  
  Consider $foo = 'abc&' and $n = 3. I would want 'abc' to match, and '&' to not match, since it is not 3 chars long. '&am' matches,

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