diff --git a/6.destructuring Objects.md b/6.destructuring-objects.md
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diff --git a/7.destructuring-array.md b/7.destructuring-array.md
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+# 数组解构
+### 获取对应位置的元素
+```
+const numbers = [1, 2, 3, 4];
+const [, two,] = numbers; // 获取数组的第二个元素
+const [one, ...others] = numbers; // 获取第一个元素以及剩余的数的数组
+```
+### 默认值
+```
+const detail = ['Dp', 'dmtms.com'];
+const [name, website, category = 'php'] = detail;
+```
+
+### 最常见的用法
+* 交换变量的值
+```
+let a = 10;
+let b = 20;
+[a, b] = [b, a];
+
+console.log(a); // 输出：20
+```
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diff --git a/8.for-of-loop.md b/8.for-of-loop.md
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+# for of
+```
+// for循环 可读性差、繁琐
+const fruits = ['apple', 'banana', 'orange', 'mango'];
+for (let i = 0; i < fruits.length; i++) {
+    console.log(fruits[i]);
+}
+
+// forEach 不能终止或者跳过
+fruits.forEach(fruit => console.log(fruit));
+
+// for in 遍历对象上的可枚举属性 如果
+fruits.describe = 'my favourite fruits'；
+// describe的内容也会遍历出来
+for (let index in fruits) {
+    console.log(fruits[index]);
+}
+
+// for of 支持终止打断，fruit直接就是属性值
+for(fruit of fruits){
+	console.log(fruit);
+}
+```
+### 使用实例
+> 可以遍历可迭代对象，可迭代对象就是部署了迭代器接口 `iterable`，很多内置的数据结构提供了内置的遍历器接口。比如 `array` 或者 `map`
+
+```
+for(let [index,fruit] of fruits.entries()){
+	console.log(`${fruit} ranks ${index+1} in my favorite fruits`);
+}
+```
+`for of` 支持循环数组，字符串，`map`，set，arguments等数据结构，但是目前不支持对象
+
+```
+// 数组
+function sum() {
+    let total = 0;
+    for (let num of arguments) {
+        total += num;
+    }
+    console.log(total);
+}
+sum(23, 432, 65, 767, 23);
+
+// 字符串
+let name = 'laravel';
+for (let char of name) {
+    console.log(char);
+}
+
+// nodelist
+const lis = document.querySelectorAll('li');
+for (let li of lis) {
+    li.addEventListener('click', function () {
+        this.classList.toggle('completed');
+    });
+}
+```