Nope; the whole point of a set is that it doesn't allow duplicates. @"the" is equal to @"the", so it will only be included once. The documentation is quite clear about this.
And while your NSDictionary trick will work, I wouldn't recommend it. It's a misuse of what a dictionary is supposed to be used for. Dave Sent from my iPhone On Mar 11, 2011, at 6:33 PM, Stevo Brock <[email protected]> wrote: > Unless I'm missing something, if you have aWord1 = @"the" and aWord2 = > @"the", they will both get added to the array/set. > > You can also use an NSMutableDictionary - just > > for (NSString* word in wordsArray) > [dict setObject:anything forKey:word]; > > NSArray* uniqueWords = [dict allKeys]; > > -Stevo > > > On Mar 11, 2011, at 6:19 PM, Dave DeLong wrote: > >> Use an NSMutableSet instead. That should have constant lookup time instead >> of linear (like an array usually is). >> >> Dave >> >> Sent from my iPhone >> >> On Mar 11, 2011, at 6:11 PM, Leonardo <[email protected]> wrote: >> >>> Hi, >>> I have to extract a list of "unique words" from an array of hundred >>> thousands words and put them into an uniqueWordsArray. I already succeeded >>> but the task is very very slow because I don't index the uniqueWordsArray. >>> So my question is: how to index the array and get a fast check? >>> Actually I do: >>> >>> for(NSString *aWord in wordsArray){ >>> if([uniqueWordsArray containsObject:aWord] == NO){ >>> [uniqueWordsArray addObject:aWord]; >>> } >>> } >>> >>> You understand well that the task works fast at the beginning, but it gets >>> slower and slower at any word added to the uniqueWordsArray. >>> What's the best way to do that? >>> Should I use the internal SQLLite database? CoreData? Other? >>> >>> >>> Regards >>> -- Leonardo >>> >>> >>> _______________________________________________ >>> >>> Cocoa-dev mailing list ([email protected]) >>> >>> Please do not post admin requests or moderator comments to the list. >>> Contact the moderators at cocoa-dev-admins(at)lists.apple.com >>> >>> Help/Unsubscribe/Update your Subscription: >>> http://lists.apple.com/mailman/options/cocoa-dev/davedelong%40me.com >>> >>> This email sent to [email protected] >> _______________________________________________ >> >> Cocoa-dev mailing list ([email protected]) >> >> Please do not post admin requests or moderator comments to the list. >> Contact the moderators at cocoa-dev-admins(at)lists.apple.com >> >> Help/Unsubscribe/Update your Subscription: >> http://lists.apple.com/mailman/options/cocoa-dev/stevo%40monkey-tools.com >> >> This email sent to [email protected] > > _______________________________________________ > > Cocoa-dev mailing list ([email protected]) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/cocoa-dev/davedelong%40me.com > > This email sent to [email protected] _______________________________________________ Cocoa-dev mailing list ([email protected]) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [email protected]
