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

Posted by Peyton Watkins
Peyton Watkins
7,946 Points

Can somebody help me get pass this please?

Using the flatMap function, transform the nested arrays in the numbers constant to a flattened array.

Assign the result to a constant named flattenedNumbers.

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

1 Answer

David Papandrew
David Papandrew
8,386 Points
David Papandrew
David Papandrew
8,386 Points 
let flattenedNumbers = numbers.flatMap { $0 }