From 0dda99a04cd39f6f648b9673e1be956d0e95aef8 Mon Sep 17 00:00:00 2001
From: ruanyf <yifeng.ruan@gmail.com>
Date: Sat, 22 Nov 2014 21:59:24 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E6=94=B9array/array.from?=
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---
 docs/array.md | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/docs/array.md b/docs/array.md
index 9c68fb8..23bac7a 100644
--- a/docs/array.md
+++ b/docs/array.md
@@ -26,6 +26,16 @@ Array.from(arrayLike).map(x => x * x);
 
 ```
 
+Array.from()的一个应用是，将字符串转为数组，然后返回字符串的长度。这样可以避免JavaScript将大于\uFFFF的Unicode字符，算作两个字符的bug。
+
+```javascript
+
+function countSymbols(string) {
+  return Array.from(string).length;
+}
+
+```
+
 ## Array.of()
 
 Array.of()方法用于将一组值，转换为数组。