NSArray Equivalent of Map

Question

Given an NSArray of NSDictionary objects (containing similar objects and keys) is it possible to write perform a map to an array of specified key?

Answer 1

To summarize all other answers:

Ruby (as in the question):

array.map{|o| o.name}

Obj-C (with valueForKey):

[array valueForKey:@"name"];

Obj-C (with valueForKeyPath, see KVC Collection Operators):

[array valueForKeyPath:@"[collect].name"];

Obj-C (with enumerateObjectsUsingBlock):

NSMutableArray *newArray = [NSMutableArray array];
[array enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
     [newArray addObject:[obj name]];
}];

Swift (with map, see closures)

array.map { $0.name }

And, there are a couple of libraries that allow you to handle arrays in a more functional way. CocoaPods is recommended to install other libraries.