From 0fc76fec74da81292b31d1fa17af260ab4cac66a Mon Sep 17 00:00:00 2001
From: ruanyf <yifeng.ruan@gmail.com>
Date: Thu, 12 Nov 2015 22:52:27 +0800
Subject: [PATCH] edit array/hole

---
 docs/array.md | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/docs/array.md b/docs/array.md
index 569d835..473266e 100644
--- a/docs/array.md
+++ b/docs/array.md
@@ -461,6 +461,19 @@ Array.from(['a',,'b'])
 new Array(3).fill('a') // ["a","a","a"]
 ```
 
+`for...of`循环也会遍历空位。
+
+```javascript
+let arr = [, ,];
+for (let i of arr) {
+  console.log(1);
+}
+// 1
+// 1
+```
+
+上面代码中，数组`arr`有两个空位，`for...of`并没有忽略它们。如果改成`map`方法遍历，空位是会跳过的。
+
 `entries()`、`keys()`、`values()`、`find()`和`findIndex()`会将空位处理成`undefined`。
 
 ```javascript