Updates the indentation of the code and updated project settings for Xcode 9

Author: kelvinlauKL

Heap Sort/HeapSort.swift

@@ -1,17 +1,17 @@
 extension Heap {
   public mutating func sort() -> [T] {
     for i in stride(from: (elements.count - 1), through: 1, by: -1) {
-        elements.swapAt(0, i)
+      elements.swapAt(0, i)
       shiftDown(0, heapSize: i)
     }
     return elements
   }
 }
 
 /*
-  Sorts an array using a heap.
-  Heapsort can be performed in-place, but it is not a stable sort.
-*/
+ Sorts an array using a heap.
+ Heapsort can be performed in-place, but it is not a stable sort.
+ */
 public func heapsort<T>(_ a: [T], _ sort: @escaping (T, T) -> Bool) -> [T] {
   let reverseOrder = { i1, i2 in sort(i2, i1) }
   var h = Heap(array: a, sort: reverseOrder)

Heap Sort/Tests/HeapSortTests.swift

@@ -1,33 +1,33 @@
 import XCTest
 
 class HeapSortTests: XCTestCase {
-    func testSwift4() {
-        // last checked with Xcode 9.0b4
-        #if swift(>=4.0)
-            print("Hello, Swift 4!")
-        #endif
-    }
+  func testSwift4() {
+    // last checked with Xcode 9.0b4
+    #if swift(>=4.0)
+      print("Hello, Swift 4!")
+    #endif
+  }
+  
+  func testSort() {
+    var h1 = Heap(array: [5, 13, 2, 25, 7, 17, 20, 8, 4], sort: >)
+    let a1 = h1.sort()
+    XCTAssertEqual(a1, [2, 4, 5, 7, 8, 13, 17, 20, 25])
 
-    func testSort() {
-        var h1 = Heap(array: [5, 13, 2, 25, 7, 17, 20, 8, 4], sort: >)
-        let a1 = h1.sort()
-        XCTAssertEqual(a1, [2, 4, 5, 7, 8, 13, 17, 20, 25])
-
-        let a1_ = heapsort([5, 13, 2, 25, 7, 17, 20, 8, 4], <)
-        XCTAssertEqual(a1_, [2, 4, 5, 7, 8, 13, 17, 20, 25])
-
-        var h2 = Heap(array: [16, 14, 10, 8, 7, 8, 3, 2, 4, 1], sort: >)
-        let a2 = h2.sort()
-        XCTAssertEqual(a2, [1, 2, 3, 4, 7, 8, 8, 10, 14, 16])
-
-        let a2_ = heapsort([16, 14, 10, 8, 7, 8, 3, 2, 4, 1], <)
-        XCTAssertEqual(a2_, [1, 2, 3, 4, 7, 8, 8, 10, 14, 16])
-
-        var h3 = Heap(array: [1, 2, 3, 4, 5, 6], sort: <)
-        let a3 = h3.sort()
-        XCTAssertEqual(a3, [6, 5, 4, 3, 2, 1])
-
-        let a3_ = heapsort([1, 2, 3, 4, 5, 6], >)
-        XCTAssertEqual(a3_, [6, 5, 4, 3, 2, 1])
-    }
+    let a1_ = heapsort([5, 13, 2, 25, 7, 17, 20, 8, 4], <)
+    XCTAssertEqual(a1_, [2, 4, 5, 7, 8, 13, 17, 20, 25])
+    
+    var h2 = Heap(array: [16, 14, 10, 8, 7, 8, 3, 2, 4, 1], sort: >)
+    let a2 = h2.sort()
+    XCTAssertEqual(a2, [1, 2, 3, 4, 7, 8, 8, 10, 14, 16])
+    
+    let a2_ = heapsort([16, 14, 10, 8, 7, 8, 3, 2, 4, 1], <)
+    XCTAssertEqual(a2_, [1, 2, 3, 4, 7, 8, 8, 10, 14, 16])
+    
+    var h3 = Heap(array: [1, 2, 3, 4, 5, 6], sort: <)
+    let a3 = h3.sort()
+    XCTAssertEqual(a3, [6, 5, 4, 3, 2, 1])
+    
+    let a3_ = heapsort([1, 2, 3, 4, 5, 6], >)
+    XCTAssertEqual(a3_, [6, 5, 4, 3, 2, 1])
+  }
 }

Heap Sort/Tests/Tests.xcodeproj/project.pbxproj

@@ -86,7 +86,7 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 0720;
-				LastUpgradeCheck = 0820;
+				LastUpgradeCheck = 0900;
 				ORGANIZATIONNAME = "Swift Algorithm Club";
 				TargetAttributes = {
 					7B2BBC7F1C779D720067B71D = {
@@ -145,14 +145,20 @@
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = YES;
 				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
 				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
@@ -191,14 +197,20 @@
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = YES;
 				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
 				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;

Heap Sort/Tests/Tests.xcodeproj/xcshareddata/xcschemes/Tests.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0820"
+   LastUpgradeVersion = "0900"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
@@ -26,6 +26,7 @@
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      language = ""
       shouldUseLaunchSchemeArgsEnv = "YES">
       <Testables>
          <TestableReference
@@ -46,6 +47,7 @@
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      language = ""
       launchStyle = "0"
       useCustomWorkingDirectory = "NO"
       ignoresPersistentStateOnLaunch = "NO"