diff --git a/README.md b/README.md
index 9645fae..9009371 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 不过都是些源码，下载速度非常快。我更建议您使用`git clone`，这样以后更新时只要`git pull`就可以了，避免了重复下载的麻烦。
 
 # 快速索引
-[简书]()、[bestswifter]()
+
 这些demo都是用来配合我的博客，你可以选择在简书或我的个人博客阅读文章，水平有限欢迎指正。
 
 * 你应该知道的Swift小tips：[简书](http://www.jianshu.com/p/a11c6060176c)
@@ -16,3 +16,4 @@
 * UIKit性能调优实战讲解：[简书](http://www.jianshu.com/p/619cf14640f3)、[bestswifter](http://bestswifter.com/uikitxing-neng-diao-you-shi-zhan-jiang-jie/)
 * Swift递归枚举与红黑树：[简书](http://www.jianshu.com/p/ad09e1f404b0)
 * 史上最简单的UIScrollView+Autolayout出坑指南：[简书](http://www.jianshu.com/p/f7f1ba67c3ca)、[bestswifter](http://bestswifter.com/uiscrollviewwithautolayout/)
+* 几个加速Swift开发的小tip：[简书]()
\ No newline at end of file
diff --git a/SwiftTips/README.md b/SwiftTips/README.md
new file mode 100644
index 0000000..dfc214c
--- /dev/null
+++ b/SwiftTips/README.md
@@ -0,0 +1,3 @@
+# 几个加速Swift开发的小tip
+
+这份代码是[《几个加速Swift开发的小tip》]()一文的demo,主要介绍了Swift中很不错，但也很容易忽视的小tip，掌握这些小技巧能够一定程度上加快开发速度，写出更好的代码
\ No newline at end of file
diff --git a/SwiftTips/SwiftTips.xcodeproj/project.pbxproj b/SwiftTips/SwiftTips.xcodeproj/project.pbxproj
index 14638c4..855bee8 100644
--- a/SwiftTips/SwiftTips.xcodeproj/project.pbxproj
+++ b/SwiftTips/SwiftTips.xcodeproj/project.pbxproj
@@ -8,7 +8,6 @@
 
 /* Begin PBXBuildFile section */
 		9BE365691C60CFCE00C61A55 /* main.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9BE365681C60CFCE00C61A55 /* main.swift */; };
-		9BE365741C60D07B00C61A55 /* Closure.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9BE3656F1C60D07B00C61A55 /* Closure.swift */; };
 		9BE365751C60D07B00C61A55 /* PrivateSet.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9BE365701C60D07B00C61A55 /* PrivateSet.swift */; };
 		9BE365761C60D07B00C61A55 /* Semicolon.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9BE365711C60D07B00C61A55 /* Semicolon.swift */; };
 		9BE365771C60D07B00C61A55 /* Breakpoint.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9BE365721C60D07B00C61A55 /* Breakpoint.swift */; };
@@ -30,7 +29,6 @@
 /* Begin PBXFileReference section */
 		9BE365651C60CFCE00C61A55 /* SwiftTips */ = {isa = PBXFileReference; explicitFileType = "compiled.mach-o.executable"; includeInIndex = 0; path = SwiftTips; sourceTree = BUILT_PRODUCTS_DIR; };
 		9BE365681C60CFCE00C61A55 /* main.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = main.swift; sourceTree = "<group>"; };
-		9BE3656F1C60D07B00C61A55 /* Closure.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = Closure.swift; sourceTree = "<group>"; };
 		9BE365701C60D07B00C61A55 /* PrivateSet.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = PrivateSet.swift; sourceTree = "<group>"; };
 		9BE365711C60D07B00C61A55 /* Semicolon.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = Semicolon.swift; sourceTree = "<group>"; };
 		9BE365721C60D07B00C61A55 /* Breakpoint.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = Breakpoint.swift; sourceTree = "<group>"; };
@@ -68,7 +66,6 @@
 			isa = PBXGroup;
 			children = (
 				9BE365681C60CFCE00C61A55 /* main.swift */,
-				9BE3656F1C60D07B00C61A55 /* Closure.swift */,
 				9BE365701C60D07B00C61A55 /* PrivateSet.swift */,
 				9BE365711C60D07B00C61A55 /* Semicolon.swift */,
 				9BE365721C60D07B00C61A55 /* Breakpoint.swift */,
@@ -137,7 +134,6 @@
 				9BE365691C60CFCE00C61A55 /* main.swift in Sources */,
 				9BE365781C60D07B00C61A55 /* ReuseIdentifier.swift in Sources */,
 				9BE365751C60D07B00C61A55 /* PrivateSet.swift in Sources */,
-				9BE365741C60D07B00C61A55 /* Closure.swift in Sources */,
 				9BE365771C60D07B00C61A55 /* Breakpoint.swift in Sources */,
 				9BE365761C60D07B00C61A55 /* Semicolon.swift in Sources */,
 			);
@@ -259,6 +255,7 @@
 				9BE3656E1C60CFCE00C61A55 /* Release */,
 			);
 			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
 		};
 /* End XCConfigurationList section */
 	};
diff --git a/SwiftTips/SwiftTips/Closure.swift b/SwiftTips/SwiftTips/Closure.swift
deleted file mode 100644
index 079dbd9..0000000
--- a/SwiftTips/SwiftTips/Closure.swift
+++ /dev/null
@@ -1,24 +0,0 @@
-//
-//  Closure.swift
-//  Handy
-//
-//  Created by 张星宇 on 16/2/2.
-//  Copyright © 2016年 zxy. All rights reserved.
-//
-
-import Foundation
-import Cocoa
-
-enum Theme {
-    case Day, Night, Dusk, Dawn
-    
-    func applyColor() {
-        let backgroundColor: NSColor = {
-            switch self {
-            case Day: return NSColor.whiteColor()
-            case Night: return NSColor.darkGrayColor()
-            default: return NSColor.blackColor()
-            }
-        }()
-    }
-}
\ No newline at end of file
diff --git a/SwiftTips/SwiftTips/Semicolon.swift b/SwiftTips/SwiftTips/Semicolon.swift
index 14f7a10..5f72745 100644
--- a/SwiftTips/SwiftTips/Semicolon.swift
+++ b/SwiftTips/SwiftTips/Semicolon.swift
@@ -11,4 +11,13 @@ import Foundation
 func doSomething() {
     let error: AnyObject? = nil
     guard error == nil else { print("Error information"); return }
+    
+    /**
+    *  Old version
+    */
+    guard error == nil
+    else {
+        print("Error information")
+        return
+    }
 }
\ No newline at end of file