On Jul 28, 2011, at 1:35 PM, Chris Paveglio wrote: > I'm looking at using: - (NSArray *)filteredArrayUsingPredicate:(NSPredicate > *)predicate
I was going to suggest using a block to filter, but it seems that Foundation
collections still don’t implement the standard functional operators like ‘map’
and ‘filter' found in lots of other languages. Which is too bad, since
otherwise you could write it compactly as
NSArray* filtered = [paths filter: ^(NSString path){
return [validExtensions containsObject:
path.pathExtension.lowercaseString];
}];
There’s -indexesOfObjectsWithOptions:passingTest:, as Kyle pointed out, but
that adds another step of generating and using an index-set.
I found the lack of -map so annoying that I wrote a category method for it in
my current project...
—Jens
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