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1. Regular expressions with RegexKitLite

   http://regexkit.sourceforge.net/RegexKitLite/

   #import "RegexKitLite.h"
   

   -[NSString captureRegex:]

   - (NSString *)captureRegex:(NSString *)regex {
       NSRange searchRange = NSMakeRange(0, [self length]);
       NSError *error = nil;
       NSRange matchedRange = [self rangeOfRegex:regex options:(RKLMultiline|RKLDotAll) inRange:searchRange capture:1 error:&error];
       if(error) SQLogError(@"-- error: %@", error);
   
       NSString *result = nil;
       if( (matchedRange.location + matchedRange.length) <= [self length] ) {
           result = [self substringWithRange:matchedRange];
       }
   
       return result;
   }
   

   -[NSString matchRegex:]

   - (BOOL)matchRegex:(NSString *)regex {
       NSArray *matches = [self componentsMatchedByRegex:regex];
       return [matches count] == 1;
   }