Use modulo operator to limit the column

Baseline: 0.0066704
danielctull · Dec 3, 2020 · 6b48e83 · 6b48e83
1 parent 104690e
commit 6b48e83
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Showing 2 changed files with 4 additions and 6 deletions.
diff --git a/...hareddata/xcbaselines/Year2020Tests.xcbaseline/C33A1570-C2BB-4BB6-807D-B47B33825559.plist b/...hareddata/xcbaselines/Year2020Tests.xcbaseline/C33A1570-C2BB-4BB6-807D-B47B33825559.plist
@@ -11,9 +11,9 @@
 				<key>com.apple.XCTPerformanceMetric_WallClockTime</key>
 				<dict>
 					<key>baselineAverage</key>
-					<real>0.067099</real>
+					<real>0.0066704</real>
 					<key>baselineIntegrationDisplayName</key>
-					<string>3 Dec 2020 at 18:39:30</string>
+					<string>3 Dec 2020 at 18:46:29</string>
 				</dict>
 			</dict>
 		</dict>

diff --git a/Year2020/Sources/Day03.swift b/Year2020/Sources/Day03.swift
@@ -21,11 +21,9 @@ public enum Day03 {
 
     private static func count(input: Input, right: Int, down: Int) -> Int {
         let columns = (0...).striding(by: right)
-        let rows = input.lines.striding(by: down).map { $0.cycled() }
+        let rows = input.lines.striding(by: down)
         return zip(columns, rows).count(where: { column, row in
-            var iterator = row.dropFirst(column).makeIterator()
-            let character = iterator.next()!
-            return character == "#"
+            Array(row)[column % row.count] == "#"
         })
     }
 }