2018-10-10 22:03:03 +00:00
|
|
|
---
|
|
|
|
id: bd7993c9c69feddfaeb8bdef
|
2021-03-15 03:20:39 +00:00
|
|
|
title: 使用 JavaScript 数组将多个值存储在一个变量中
|
2018-10-10 22:03:03 +00:00
|
|
|
challengeType: 1
|
2020-04-29 10:29:13 +00:00
|
|
|
videoUrl: 'https://scrimba.com/c/crZQWAm'
|
|
|
|
forumTopicId: 18309
|
2021-01-13 02:31:00 +00:00
|
|
|
dashedName: store-multiple-values-in-one-variable-using-javascript-arrays
|
2018-10-10 22:03:03 +00:00
|
|
|
---
|
|
|
|
|
2020-12-16 07:37:30 +00:00
|
|
|
# --description--
|
2018-10-10 22:03:03 +00:00
|
|
|
|
2021-03-15 03:20:39 +00:00
|
|
|
使用数组(`array`),我们可以在一个地方存储多个数据。
|
2018-10-10 22:03:03 +00:00
|
|
|
|
2021-03-15 03:20:39 +00:00
|
|
|
以左方括号开始定义一个数组,以右方括号结束,里面每个元素之间用逗号隔开,例如:
|
2018-10-10 22:03:03 +00:00
|
|
|
|
2021-04-05 15:04:04 +00:00
|
|
|
```js
|
|
|
|
var sandwich = ["peanut butter", "jelly", "bread"]
|
|
|
|
```
|
2018-10-10 22:03:03 +00:00
|
|
|
|
2020-12-16 07:37:30 +00:00
|
|
|
# --instructions--
|
2018-10-10 22:03:03 +00:00
|
|
|
|
2021-04-29 15:43:46 +00:00
|
|
|
创建一个包含字符串(`string`)和数字( `number`)(按照字符串数字的顺序)的数组 `myArray`。
|
2018-10-10 22:03:03 +00:00
|
|
|
|
2020-12-16 07:37:30 +00:00
|
|
|
# --hints--
|
2018-10-10 22:03:03 +00:00
|
|
|
|
2021-04-05 15:04:04 +00:00
|
|
|
`myArray` 应该是一个数组(`array`)。
|
2018-10-10 22:03:03 +00:00
|
|
|
|
|
|
|
```js
|
2020-12-16 07:37:30 +00:00
|
|
|
assert(typeof myArray == 'object');
|
2018-10-10 22:03:03 +00:00
|
|
|
```
|
|
|
|
|
2021-03-15 03:20:39 +00:00
|
|
|
`myArray` 数组的第一个元素应该是一个字符串(`string`)。
|
2018-10-10 22:03:03 +00:00
|
|
|
|
2020-12-16 07:37:30 +00:00
|
|
|
```js
|
|
|
|
assert(typeof myArray[0] !== 'undefined' && typeof myArray[0] == 'string');
|
|
|
|
```
|
2018-10-10 22:03:03 +00:00
|
|
|
|
2021-03-15 03:20:39 +00:00
|
|
|
`myArray` 数组的第二个元素应该是一个数字(`number`)。
|
2020-04-29 10:29:13 +00:00
|
|
|
|
2018-10-10 22:03:03 +00:00
|
|
|
```js
|
2020-12-16 07:37:30 +00:00
|
|
|
assert(typeof myArray[1] !== 'undefined' && typeof myArray[1] == 'number');
|
2018-10-10 22:03:03 +00:00
|
|
|
```
|
2020-04-29 10:29:13 +00:00
|
|
|
|
2021-01-13 02:31:00 +00:00
|
|
|
# --seed--
|
|
|
|
|
|
|
|
## --after-user-code--
|
|
|
|
|
|
|
|
```js
|
|
|
|
(function(z){return z;})(myArray);
|
|
|
|
```
|
|
|
|
|
|
|
|
## --seed-contents--
|
|
|
|
|
|
|
|
```js
|
|
|
|
// Only change code below this line
|
|
|
|
var myArray = [];
|
|
|
|
```
|
|
|
|
|
2020-12-16 07:37:30 +00:00
|
|
|
# --solutions--
|
|
|
|
|
2021-01-13 02:31:00 +00:00
|
|
|
```js
|
|
|
|
var myArray = ["The Answer", 42];
|
|
|
|
```
|