lilythy
diff --git a/‎Iterator/Iterator.html
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diff --git a/‎Iterator/jquery-1.8.2.min.js
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+<script type="text/javascript" src='jquery-1.8.2.min.js'></script>
+<script type="text/javascript">
+    $.each([1,2,3],function(i,n){
+        console.log('当前下标为：' + i);
+        console.log('当前值为：' +  n);
+    });
+
+    var each = function(ary,callback){
+        for(var i= 0,l=ary.length;i<l;i++){
+            callback.call(ary[i],i,ary[i]);   // 把下标和元素当作参数传给callback 函数
+        }
+    };
+
+    each([1,2,3,4],function(i,n){
+        alert([i,n]);
+    });
+
+    var compare = function(ary1,ary2){
+        if(ary1.length !== ary2.length){
+            throw new Error('ary1 和ary2 不相等');
+        }
+        each(ary1,function(i,n){
+            if(n !== ary2[i]){
+                throw new Error('ary1 和ary2 不相等');
+            }
+        });
+        alert('ary1 和ary2 相等!');
+    }
+
+    compare([1,2,3],[1,2,4]);   // throw new Error ( 'ary1 和ary2 不相等' );
+
+    var Iterator = function(obj){
+        var current = 0;
+        var next = function(){
+            current += 1;
+        };
+        var isDone = function(){
+            return current >= obj.length;
+        };
+        var getCurrItem = function(){
+            return obj[current];
+        };
+        return {
+            next:next,
+            isDone:isDone,
+            getCurrItem:getCurrItem
+        }
+    };
+
+    //再看看如何改写compare 函数：
+    var compare1 = function(iterator1,iterator2){
+        while(iterator1.isDone() && iterator2.isDone()){
+            if(iterator1.getCurrItem() !== iterator2.getCurrItem()){
+                throw new Error('ary1 和ary2 不相等');
+            }
+            iterator1.next();
+            iterator2.next();
+        }
+        alert('iterator1 和iterator2 相等.');
+    }
+    var iterator1 = Iterator([1,2,3]);
+    var iterator2 = Iterator([1,2,3]);
+    compare1(iterator1,iterator2);           // 输出：iterator1 和iterator2 相等
+
+    $.each = function(obj,callback){
+        var value,
+            i = 0,
+            length = obj.length,
+            isArray = isArraylike(obj);
+        if(isArray){                     // 迭代类数组
+            for(;i<length;i++){
+                value = callback.call(obj[i],i,obj[i]);
+                if(value === false){
+                    break;
+                }
+            }
+        }else{
+            for(i in obj){                // 迭代object 对象
+                value = callback.call(obj[i],i,obj[i]);
+                if(value === false){
+                    break;
+                }
+            }
+        }
+        return obj;
+    };
+
+    var reverseEach = function(ary,callback){
+        for(var l = ary.length-1;l>=0;l--){
+            callback(l,ary[l]);
+        }
+    };
+
+    reverseEach([0,1,2],function(i,n){
+        console.log(n);               // 分别输出：2, 1 ,0
+    });
+
+    var each1 = function(ary,callback){
+        for(var i = 0,l = ary.length;i<l;i++){
+            if(callback(i,ary[i]) === false){        // callback 的执行结果返回false，提前终止迭代
+                break;
+            }
+        }
+    };
+
+    each1([1,2,3,4,5],function(i,n){
+        if(n>3){                        // n 大于3 的时候终止循环
+            return false;
+        }
+        console.log(n);               // 分别输出：1, 2, 3
+    });
+</script>