Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.java.programmer > #11092

Re: Regex doesn't recognize single quote

Show all headers | View raw

On 7 Jan 2012 11:42:26 GMT, ram@zedat.fu-berlin.de (Stefan Ram) wrote,
quoted or indirectly quoted someone who said :

>>That is not what a regex is for.
>
>  How do you know what it is for?

Regexes are for searching for patterns.  Transforming or deleting
characters is much simpler done with a for loop. 

How do I know what a regex is for? I am familiar with the API. I have
attempted to use them for various purposes and discovered they were
suitable for some and not for others. 
>
>>Just use a StringBuilder the length of your String. Then
>>loop through the chars with charAt.  If the character is a
>>' or \w, ignore it, else append.  If it gets complex, use a
>>switch or if it gets really complicated use a BitSet.
>
>  This might be needless (as far as we know right now)
>  optimization bloating the code reducing its readability and
>  low-level thinking, which might be required sometimes, but
>  does not serve as a general rule. Still it is nice to know
>  how it could be done if required.

What is your simpler implementation?  

/** remove ' and \w from string
  * @param s string to process
  * @return string without ' or \w
  */
private static String scrunch( final String s ) 
{
final Stringbuilder sb = new StringBuilder( s.length() );
for (int i=0; i<s.length(); i++ )
  { 
  char c = s.charAt(i);
  if ( !( c = '\'' || c = '\w' ) )
     {
     sb.append ( c );
     }
  }
return sb.toString();
}
-- 
Roedy Green Canadian Mind Products
http://mindprod.com
If you can't remember the name of some method, 
consider changing it to something you can remember.
 

Back to comp.lang.java.programmer | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Regex doesn't recognize single quote Jerric <jerricgao@gmail.com> - 2012-01-06 14:08 -0800
  Re: Regex doesn't recognize single quote Martin Gregorie <martin@address-in-sig.invalid> - 2012-01-06 22:23 +0000
  Re: Regex doesn't recognize single quote Jake Jarvis <pig_in_shoes@yahoo.com> - 2012-01-06 23:48 +0100
  Re: Regex doesn't recognize single quote Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-01-06 15:49 -0800
    Re: Regex doesn't recognize single quote Jim Janney <jjanney@shell.xmission.com> - 2012-01-07 19:02 -0700
      Re: Regex doesn't recognize single quote Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-01-09 09:58 -0800
  Re: Regex doesn't recognize single quote Roedy Green <see_website@mindprod.com.invalid> - 2012-01-06 21:47 -0800
    Re: Regex doesn't recognize single quote Roedy Green <see_website@mindprod.com.invalid> - 2012-01-07 14:41 -0800
      Re: Regex doesn't recognize single quote Rafael Villar <morgano5@hotmail.com> - 2012-01-08 09:05 +1000
        Re: Regex doesn't recognize single quote Rafael Villar <morgano5@hotmail.com> - 2012-01-08 09:10 +1000
        Re: Regex doesn't recognize single quote Lew <noone@lewscanon.com> - 2012-01-07 17:20 -0800
      Re: Regex doesn't recognize single quote Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-01-09 10:08 -0800
        Re: Regex doesn't recognize single quote Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-01-09 10:33 -0800
    Re: Regex doesn't recognize single quote Roedy Green <see_website@mindprod.com.invalid> - 2012-01-07 14:48 -0800
      Re: Regex doesn't recognize single quote Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2012-01-07 20:58 -0400

csiph-web