April 2017
Intermediate to advanced
316 pages
9h 33m
English
Content preview from Swift Functional Programming - Second Edition
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Removing nil values from an array
We can use flatMap to get values out of optionalArray and remove nil values:
let optionalArray: [String?] = ["First", "Second", nil, "Fourth"] let nonOptionalArray = optionalArray.flatMap { $0 } print(nonOptionalArray)
The result will be ["First", "Second", "Fourth"], as expected.
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