Replace deprecated flatMap() with compactMap()

davecom · davecom · commit 2c1e6cdf0b00 · 2018-09-09T23:01:01.000-04:00
diff --git a/Classic Computer Science Problems in Swift.playground/Pages/Chapter 8.xcplaygroundpage/Contents.swift b/Classic Computer Science Problems in Swift.playground/Pages/Chapter 8.xcplaygroundpage/Contents.swift
@@ -151,7 +151,7 @@ let phoneMapping: [Character: [Character]] = ["1": ["1"], "2": ["a", "b", "c"],
 
 // return all of the possible characters combos, given a mapping, for a given number
 func stringToPossibilities(_ s: String, mapping: [Character: [Character]]) -> [[Character]]{
-    let possibilities = s.flatMap{ mapping[$0] }
+    let possibilities = s.compactMap{ mapping[$0] }
     print(possibilities)
     return combineAllPossibilities(possibilities)
 }

Original file line number	Diff line number	Diff line change
`@@ -151,7 +151,7 @@ let phoneMapping: [Character: [Character]] = ["1": ["1"], "2": ["a", "b", "c"],`
`151`	`151`
`152`	`152`	`// return all of the possible characters combos, given a mapping, for a given number`
`153`	`153`	`func stringToPossibilities(_ s: String, mapping: [Character: [Character]]) -> [[Character]]{`
`154`		`- let possibilities = s.flatMap{ mapping[$0] }`
	`154`	`+ let possibilities = s.compactMap{ mapping[$0] }`
`155`	`155`	`print(possibilities)`
`156`	`156`	`return combineAllPossibilities(possibilities)`
`157`	`157`	`}`