21 lines
570 B
Markdown
21 lines
570 B
Markdown
|
---
|
|||
|
|
title: Remove Items from an Array with pop() and shift()
|
|||
|
|
localeTitle: 使用pop（）和shift（）从数组中删除项
|
|||
|
|
---
|
|||
|
|
## 使用pop（）和shift（）从数组中删除项
|
|||
|
|
|
|||
|
|
* 必须使用`popped`和`shifted`变量调用和初始化`.pop()`方法和`.shift()`方法，以从函数返回正确的答案。
|
|||
|
|
|
|||
|
|
## 解：
|
|||
|
|
|
|||
|
|
```javascript
|
|||
|
|
function popShift(arr) {
|
|||
|
|
let popped = arr.pop();
|
|||
|
|
let shifted = arr.shift();
|
|||
|
|
return [shifted, popped];
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// do not change code below this line
|
|||
|
|
console.log(popShift(['challenge', 'is', 'not', 'complete']));
|
|||
|
|
|
|||
|
|
```
|