Re: Regex doesn't recognize single quote
On 7 Jan 2012 11:42:26 GMT, email@example.com (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 );
Roedy Green Canadian Mind Products
If you can't remember the name of some method,
consider changing it to something you can remember.