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iOS Closures in Swift 2 Building Standard Library Functions Using Flat Map

Posted by Jared Welch
Jared Welch
5,616 Points

Code Challenge

I'm lost on what to do after this or if this is even right

flatMap.swift 
let numbers = [[1,2,3], [4,5,6], [7,8,9]]

let flattenedNumbers = numbers.flatmap

1 Answer

David Papandrew
David Papandrew
8,386 Points
David Papandrew
David Papandrew
8,386 Points

You may have already solved, but here is the answer:

Note, make sure you type "flatMap" not "flatmap"

let numbers = [[1,2,3], [4,5,6], [7,8,9]]
let flattenedNumbers = numbers.flatMap{ $0 }
Jared Welch
Jared Welch
5,616 Points

I got it now! Thank you!