April 2017
Intermediate to advanced
316 pages
9h 33m
English
Content preview from Swift Functional Programming - Second Edition
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The flatten function in terms of reduce
And finally, let's implement the flatten function in terms of reduce:
func flattenIntermsOfReduce<Element>(elements: [[Element]]) -> [Element] { return elements.reduce([]) { $0 + $1 } } let flattened = flattenIntermsOfReduce(elements: aTwoDimArrayOfNumbers)
flattened will be [1, 3, 5, 2, 4, 6].
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