Convert NSArray of NSDictionary into NSArray of dictionary values

Question

Is there an direct way to convert an NSArray containing NSDictionary into an NSArray containing values of the dictionaries?

I have an array like this:

a = [ { name = "A"},{ name = "B"}, {name = "C" } ]

And I want this:

a = [ "A", "B", "C" ]

I can only think about iterating the previous array, and adding each field into the new mutable one, to ensure the same order. I'm wondering if there is a higher level operation or syntactic sugar that does that.

Thanks.

I don't think there is build-in `map` function. But there are a number of third-part frameworks provide it. — Bryan Chen, Jul 09 '14 at 23:03

score 7 · Accepted Answer · edited Jul 09 '14 at 23:18

7

The easiest way would be to use KVC:

a = [a valueForKey:@"name"];

From the documentation:

Returns an array containing the results of invoking valueForKey: using key on each of the array's objects.

edited Jul 09 '14 at 23:18

vikingosegundo

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answered Jul 09 '14 at 23:09

Dima

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Ah! I didn't know this. Brilliant. Will be changing some of my code tomorrow :D – Fogmeister Jul 09 '14 at 23:11

Convert NSArray of NSDictionary into NSArray of dictionary values

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