doc(proxy): 修改proxy链式使用的例子

docs/proxy.md

@@ -249,49 +249,24 @@ arr[-1] // c
 
 ```javascript
 var pipe = (function () {
-  var pipe;
   return function (value) {
-    pipe = [];
-    return new Proxy({}, {
-      get: function (pipeObject, fnName) {
-        if (fnName == "get") {
-          return pipe.reduce(function (val, fn) {
+    var funcStack = [];
+    var oproxy = new Proxy({} , {
+      get : function (pipeObject, fnName) {
+        if (fnName === 'get') {
+          return funcStack.reduce(function (val, fn) {
             return fn(val);
-          }, value);
+          },value);
         }
-        pipe.push(window[fnName]);
-        return pipeObject;
+        funcStack.push(window[fnName]);
+        return oproxy;
       }
     });
+
+    return oproxy;
   }
 }());
 
-var double = n => n * 2;
-var pow = n => n * n;
-var reverseInt = n => n.toString().split('').reverse().join('') | 0;
-
-pipe(3).double.pow.reverseInt.get
-// 63
-
-var pipe = (function () {
- return function (value) {
-		var funcStack = [];            // 认为和上面pipe同名不利于理解，换了一个名
-		var oproxy = new Proxy({} , {  // 使用了一个oproxy 存储Proxy的指向
-			get : function (pipeObject , fnName) {
-				if (fnName === "get") {
-					return funcStack.reduce(function (val , fn) {
-						return fn(val);
-					},value);
-				} 
-				funcStack.push(window[fnName]);
-				return oproxy;
-			}
-		});
-		
-		return oproxy;
-	}
-}());
-
 var double = n => n * 2;
 var pow    = n => n * n;
 var reverseInt = n => n.toString().split("").reverse().join("") | 0;