Re: Sorting NSArray -- advice on how to accomplish a "simple" alpha ordering?
Re: Sorting NSArray -- advice on how to accomplish a "simple" alpha ordering?
- Subject: Re: Sorting NSArray -- advice on how to accomplish a "simple" alpha ordering?
- From: Michael Babin <email@hidden>
- Date: Wed, 01 Aug 2012 09:38:44 -0500
On Aug 1, 2012, at 8:00 AM, Erik Stainsby <email@hidden> wrote:
> So I have a dictionary like so:
>
> NSDictionary * countries = [NSDictionary dictionaryWithObjects:[NSArray arrayWithObjects:@"Australia",@"Canada",@"United Kingdom",@"United States",nil] forKeys:[NSArray arrayWithObjects:@"au",@"ca",@"uk",@"us",nil]];
>
> I want to present them alphabetically as menuItems in an NSPopUpButton. I grab the list of keys:
>
> NSMutableArray * sortkeys = [NSMutableArray arrayWithArray:[countries allKeys]];
>
> What I have come up with is this:
>
> [sortkeys sortUsingComparator:^NSComparisonResult(id obj1, id obj2) {
> return [(NSString*)obj1 compare:(NSString*)obj2 ];
> } ];
>
> Is this a sane approach ? Seems a bit fussy to have to spec the cast like this. Or is this just the what-is of this kind of functionality?
If your comparison is only going to be a single method call with a single parameter like this, then probably a bit simpler to use:
[sortkeys sortUsingSelector:@selector(compare:)];
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