From bebb1f94415f8d134a9c9071c5b74024909d9b13 Mon Sep 17 00:00:00 2001
From: Valeriy Van <v.van@parkling.eu>
Date: Tue, 16 Oct 2018 20:16:48 +0200
Subject: [PATCH] Uses indices property instead of 0..<array.count

---
 TetrisDiffingCompetition/Tetris/Tetris.swift | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/TetrisDiffingCompetition/Tetris/Tetris.swift b/TetrisDiffingCompetition/Tetris/Tetris.swift
index 7f9b20e..e54bc83 100644
--- a/TetrisDiffingCompetition/Tetris/Tetris.swift
+++ b/TetrisDiffingCompetition/Tetris/Tetris.swift
@@ -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] } }
 }