回答編集履歴
2
10
test
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@@ -72,7 +72,7 @@
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```swift
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let integerArray = [(Int, UInt32)](repeating: (0, 0), count:
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let integerArray = [(Int, UInt32)](repeating: (0, 0), count: 10)
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.enumerated().map {($0.0+1, arc4random_uniform(UInt32.max))}
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1
まじめ
test
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@@ -19,3 +19,71 @@
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質問文中に「乱数」って書かれていないので。
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# 真面目に
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```swift
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let Length = 10
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let array = [(Int, UInt32)](repeating: (0, 0), count: Length)
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//1~10に乱数で重みを付ける
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let weighted = array.enumerated().map {($0.0+1, arc4random_uniform(UInt32.max))}
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print(weighted)
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//=> [(1, 2394627293), (2, 3231339695), (3, 1429293380), (4, 2040053551), (5, 1055190483), (6, 2379829461), (7, 1949144040), (8, 522764666), (9, 1567954026), (10, 1966320976)]
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//重みでソートする
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let sorted = weighted.sorted {$0.1 > $1.1}
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print(sorted)
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//=> [(2, 3231339695), (1, 2394627293), (6, 2379829461), (4, 2040053551), (10, 1966320976), (7, 1949144040), (9, 1567954026), (3, 1429293380), (5, 1055190483), (8, 522764666)]
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//ソート結果から1~10を取り出す
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let integerArray = sorted.map {$0.0}
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print(integerArray)
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//=> [2, 1, 6, 4, 10, 7, 9, 3, 5, 8]
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```
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まとめると、
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70
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71
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72
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73
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```swift
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74
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75
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let integerArray = [(Int, UInt32)](repeating: (0, 0), count: Length)
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76
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.enumerated().map {($0.0+1, arc4random_uniform(UInt32.max))}
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.sorted {$0.1 > $1.1}
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.map {$0.0}
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print(integerArray)
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//=> [6, 3, 9, 8, 5, 10, 7, 1, 2, 4]
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```
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