extracting properties from NSArray of objects

Question

Is there any of way (other than looping) of extracting a particular property of all objects in an array. So say there in an array of people. I want to extract all their first names into an array.

JustSid · Accepted Answer · 2012-09-07 05:17:04Z

40

Key Value coding will help you with that:

NSArray *result = [people valueForKey:@"firstname"];

answered Sep 7, 2012 at 5:17

JustSid

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2 Comments

nonolays Over a year ago

Big +1 to JustSid. Works great. Note: people must be an NSArray to be true. If people is a NSSet the result will be a NSSet

Afsal Meerankutty Over a year ago

How to achieve the same in swift ?

Afsal Meerankutty · Accepted Answer · 2016-03-02 05:59:30Z

-1

I got answer for my question. This is how we can achieve the same in swift.

let arraytWithProperties = arrayWithObjects.map{ $0.propertyName }

answered Mar 2, 2016 at 5:59

Afsal Meerankutty

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