Re: Re: Weird "soundex" algorithm

Nice. I was unhappy with your vowel stripping though. You use a looping match for offsets into $_ but really, you only have to find the *first* vowel and then no looping is required.

#  m/[aeiou]/g and substr($_, pos) =~ s/[aieuo]//g;
  /[aeiou]/ and substr( $_, $+[0] ) =~ tr/aeiou//d;
[download]

Comment on Re: Re: Weird "soundex" algorithm Download Code

Replies are listed 'Best First'.
Re: Re: Re: Weird "soundex" algorithm by broquaint (Abbot) on Aug 28, 2003 at 23:58 UTC
You use a looping match for offsets into $_ but really ... Er, what looping? The `/g` matches the first vowel then saves the position of the match for `substr` which the replace then operates on. I didn't want to use the `$+` variable because of the overhead it invokes. HTH `_________ broquaint`	[reply]
Re: Re: Re: Re: Weird "soundex" algorithm by diotalevi (Canon) on Aug 29, 2003 at 01:53 UTC
Er... what overhead? You mean of making an array access because that's all it is. @+ and @- don't invoke the $`, $& and $' penalties. Those arrays are just offsets into the string. `$-[0]` is the offset of the beginning of the string and `$+[0]` is the offset of the end of the string. Using those doesn't prompt perl to do all the copying that capturing, $`, $&, and $' do. Its just not the same thing. Granted, I did miss that scalar /g loops only once and in this usage that'd be the only loop ever used. I find myself avoiding pos() after learning that it doesn't survive a local() on the variable in question. That's just style though.	[reply] [d/l] [select]