回答編集履歴
1
すぺるみす
answer
CHANGED
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@@ -2,18 +2,18 @@
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in Swift
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```swift
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-
struct
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5
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+
struct Stamp {
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-
enum
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7
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+
enum StampType {
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case a
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case b
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case failure
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}
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let date: Int
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-
let type:
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let type: StampType
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init?(date: Int, type:
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init?(date: Int, type: StampType) {
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guard case 0..<7 = date else {
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@@ -25,7 +25,7 @@
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}
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}
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-
extension
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extension Stamp: CustomStringConvertible {
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var description: String {
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switch self.type {
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@@ -36,9 +36,9 @@
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}
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}
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-
struct
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+
struct RandomStampType: Sequence, IteratorProtocol {
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-
func next() ->
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func next() -> Stamp.StampType? {
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switch arc4random_uniform(3) {
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case 0: return .a
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@@ -49,8 +49,8 @@
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}
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}
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-
zip(Array(0..<7),
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+
zip(Array(0..<7), RandomStampType())
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-
.flatMap {
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.flatMap { Stamp(date: $0.0, type: $0.1) }
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.forEach { print($0) }
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```
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