edit iterator

ruanyf · ruanyf · commit ba4ea41929d2 · 2015-10-27T17:37:52.000+08:00
diff --git a/docs/iterator.md b/docs/iterator.md
@@ -502,11 +502,11 @@ JavaScript原有的`for...in`循环，只能获得对象的键名，不能直接
 ```javascript
 var arr = ["a", "b", "c", "d"];
 
-for (a in arr) {
+for (let a in arr) {
   console.log(a); // 0 1 2 3
 }
 
-for (a of arr) {
+for (let a of arr) {
   console.log(a); // a b c d
 }
 ```

Original file line number	Diff line number	Diff line change
@@ -502,11 +502,11 @@ JavaScript原有的`for...in`循环，只能获得对象的键名，不能直接
`502`	`502`	```javascript
`503`	`503`	`var arr = ["a", "b", "c", "d"];`
`504`	`504`
`505`		`-for (a in arr) {`
	`505`	`+for (let a in arr) {`
`506`	`506`	`console.log(a); // 0 1 2 3`
`507`	`507`	`}`
`508`	`508`
`509`		`-for (a of arr) {`
	`509`	`+for (let a of arr) {`
`510`	`510`	`console.log(a); // a b c d`
`511`	`511`	`}`
`512`	`512`	```