Re: parsing a string into words

[Gerriet M. Denkmann]

On 25 Apr 2009, at 09:21, Michael Ash <michael....@gmail.com> wrote:

On Fri, Apr 24, 2009 at 9:24 PM, Gerriet M. Denkmann
<gerr...@mdenkmann.de> wrote:

I want to parse a string into words.
Currently I do:

NSString *theString = ....
NSUInteger stringLength = [ theString length ];
NATextView *theTextView = [[NSTextView alloc] initWithFrame:
NSMakeRect(0,0,99,99) ];
[ theTextView setString: theString ];

for( NSUInteger t = 0; t < stringLength;)
{
       NSRange proposedSelRange = NSMakeRange(t,0);
       NSRange wordRange = [ theTextView
selectionRangeForProposedRange: proposedSelRange

   granularity:                                  
   NSSelectByWord
                                             
   ];
       NSString *word = [ theString substringWithRange:  
wordRange ];
       t = NSMaxRange( wordRange );

       //      do something with <word>
};

[ theTextView release ];

but this looks rather wasteful. Is there a more elegant way?

Please note that there are lots of languages, where words are not  
separated
by space or punctuation.

If you can require 10.5, use CFStringTokenizer. It is really great,
and is a lot simpler and less evil than this.


Thanks a lot. This was exactly what I was looking for.
But without knowing the term "CFStringTokenizer", it is really hard to  
find.

But this is a general problem:
Cocoa is just the tip of the iceberg, on top of lots of additional C- 
APIs which are needed to solve the not so common problems.

Would it not be a good idea, if e.g. the documentation for NSString  
would mention the C-APIs which can be used for functionality which  
NSString does not offer?
Like CFStringTransform, CFStringTokenizer etc.


Kind regards,

Gerriet.

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