koher · September 25, 2017 00:15
diff --git a/swift4-dictionary-subscript-with-default.swift b/swift4-dictionary-subscript-with-default.swift
 let array = [2, 3, 3, 4, 7, 2, 1, 4, 0, 9, 1, 2]

 // array の要素の値ごとに集計
 // 2 が 3 個、 3 が 2 個 などを知りたい
 var nToCount = [Int: Int]()
 for n in array {
    nToCount[n, default: 0] += 1
 }

 // 結果を表示
 for (n, count) in (nToCount.sorted { $0.key < $1.key }) {
    print("\(n): \(count)")
 }
	let array = [2, 3, 3, 4, 7, 2, 1, 4, 0, 9, 1, 2]

	// array の要素の値ごとに集計
	// 2 が 3 個、 3 が 2 個などを知りたい
	var nToCount = [Int: Int]()
	for n in array {
	nToCount[n, default: 0] += 1
	}

	// 結果を表示
	for (n, count) in (nToCount.sorted { $0.key < $1.key }) {
	print("\(n): \(count)")
	}