Comments on: Regular Expressions and Cocoa http://blog.jayway.com/2009/05/06/regular-expressions-and-cocoa/ Sharing Experience Sun, 12 Feb 2012 05:23:29 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: cool8jay的Mac开发心得 » iSpeLL开发日志-2010.05.09 http://blog.jayway.com/2009/05/06/regular-expressions-and-cocoa/comment-page-1/#comment-38252 cool8jay的Mac开发心得 » iSpeLL开发日志-2010.05.09 Sun, 09 May 2010 15:28:59 +0000 http://79.125.9.149/?p=1617#comment-38252 [...] 解析HTML内容，最终还是选择用正则表达式，借助第三方工具RegexKitLite。参考一，参考二。 [...] [...] 解析HTML内容，最终还是选择用正则表达式，借助第三方工具RegexKitLite。参考一，参考二。 [...]

]]> By: Jesper Särnesjö http://blog.jayway.com/2009/05/06/regular-expressions-and-cocoa/comment-page-1/#comment-4705 Jesper Särnesjö Wed, 06 May 2009 21:57:36 +0000 http://79.125.9.149/?p=1617#comment-4705 Hooray, you posted your Cocoaheads presentation! Now we all have something to link to. :) As a sidenote, this is what using regexes with NSPredicate looks like: NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES '^M?M?M?(CM|CD|D?C?C?C?)(XC|XL|L?X?X?X?)(IX|IV|V?I?I?I?)$'"]; BOOL matches = [predicate evaluateWithObject:string]; Nothing new and certainly nothing as useful as a general purpose regex engine like RegexKit, but I found out that NSPredicate could do regexes just the other day, so I think it's kinda cool. ;) (Bonus points it you can tell what the regex matches.) Further reading: * http://developer.apple.com/DOCUMENTATION/Cocoa/Reference/Foundation/Classes/NSPredicate_Class/Reference/NSPredicate.html * http://developer.apple.com/documentation/Cocoa/Conceptual/Predicates/Articles/pUsing.html#//apple_ref/doc/uid/TP40001794-SW9 Hooray, you posted your Cocoaheads presentation! Now we all have something to link to. :)

As a sidenote, this is what using regexes with NSPredicate looks like:

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES '^M?M?M?(CM|CD|D?C?C?C?)(XC|XL|L?X?X?X?)(IX|IV|V?I?I?I?)$'"];
BOOL matches = [predicate evaluateWithObject:string];

Nothing new and certainly nothing as useful as a general purpose regex engine like RegexKit, but I found out that NSPredicate could do regexes just the other day, so I think it’s kinda cool. ;)

(Bonus points it you can tell what the regex matches.)

Further reading:

* http://developer.apple.com/DOCUMENTATION/Cocoa/Reference/Foundation/Classes/NSPredicate_Class/Reference/NSPredicate.html
* http://developer.apple.com/documentation/Cocoa/Conceptual/Predicates/Articles/pUsing.html#//apple_ref/doc/uid/TP40001794-SW9

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