Re: String Character Replacement

• Subject: Re: String Character Replacement
• From: "stephen joseph butler" <email@hidden>
• Date: Fri, 10 Nov 2006 19:56:52 -0600
• Delivered-to: email@hidden
• Delivered-to: email@hidden
• Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=K8gbFLFabUdBWdB8pvzmF/7qU+d17rDeFQi5lJoxZEA8g+lRGjSK0dVy+Frwi/oFGYvnlroQIVaDfcYbL0GZIbnUHfTLiNehnDtBICaQTe2EsBUE+FbLBvesOdPI4LS4ORlFrdu1wOfvVKgD7QK/SkMaBNtXz9XDbGAOZUrcGgs=

What would be the most efficient way to replace characters in a string? Say I
have an NSString/NSMutableString that contains...

Joe:Smith:MI:123:456:8967:M

..and I want to replace all the colons with tabs?

Myself, I'd probably use NSScanner. But this is such a simple task,
I'm tempted to recommend this method:

NSString* doReplace( NSString *source, unichar from, unichar to )
{
   unichar *temp = NULL;
   unsigned int tempLength = 0;
   unsigned int i;

   if (source == nil)
       return nil;

   tempLength = [source length];
   temp = (unichar*)malloc( sizeof( unichar ) * tempLength );
   if (temp == NULL)
       return nil;

   [source getCharacters:temp];

   for (i = 0; i < tempLength; ++i)
   {
       if (temp[ i ] == from)
           temp[ i ] = to;
   }

   return [[[NSString alloc] initWithCharactersNoCopy:temp
length:tempLength freeWhenDone:YES] autorelease];
}

You can't use this outside the Basic Multilingual Plane, but for what
you're doing it is fine.
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Cocoa-dev mailing list      (email@hidden)
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/email@hidden

• Prev by Date: Re: String Character Replacement
• Next by Date: (Question Modified) How to traverse from one window to another
• Previous by thread: Re: String Character Replacement
• Next by thread: How to get user ID (501, 502, etc.)
• Index(es):
  • Date
  • Thread