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Uses indices property instead of 0..<array.count #4

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Uses indices property instead of 0..<array.count #4

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4 changes: 2 additions & 2 deletions TetrisDiffingCompetition/Tetris/Tetris.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -62,12 +62,12 @@ extension Tetromino {
}

func rotatedClockwise<T>(_ array: [[T]]) -> [[T]] {
let indices = (0..<array.count)
let indices = array.indices
return indices.map { y in indices.reversed().map { x in array[x][y] } }
}

func rotatedCounterClockwise<T>(_ array: [[T]]) -> [[T]] {
let indices = (0..<array.count)
let indices = array.indices
return indices.reversed().map { y in indices.map { x in array[x][y] } }
}

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