ee1e8abd87
* feat(tools): add seed/solution restore script * chore(curriculum): remove empty sections' markers * chore(curriculum): add seed + solution to Chinese * chore: remove old formatter * fix: update getChallenges parse translated challenges separately, without reference to the source * chore(curriculum): add dashedName to English * chore(curriculum): add dashedName to Chinese * refactor: remove unused challenge property 'name' * fix: relax dashedName requirement * fix: stray tag Remove stray `pre` tag from challenge file. Signed-off-by: nhcarrigan <nhcarrigan@gmail.com> Co-authored-by: nhcarrigan <nhcarrigan@gmail.com>
86 lines
1.4 KiB
Markdown
86 lines
1.4 KiB
Markdown
---
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id: cf1111c1c11feddfaeb8bdef
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title: 通过索引修改数组中的数据
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challengeType: 1
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videoUrl: 'https://scrimba.com/c/czQM4A8'
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forumTopicId: 18241
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dashedName: modify-array-data-with-indexes
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---
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# --description--
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与字符串的数据不可变不同，数组的数据是可变的，并且可以自由地改变。
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**示例**
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```js
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var ourArray = [50,40,30];
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ourArray[0] = 15; // equals [15,40,30]
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```
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**提示**
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数组名称和方括号之间不应有任何空格，如`array [0]`尽管 JavaScript 能够正确处理，但可能会让看你代码的其他程序员感到困惑。
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# --instructions--
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修改数组`myArray`中索引0上的值为`45`。
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# --hints--
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`myArray`的值应该 [45,64,99]。
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```js
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assert(
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(function () {
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if (
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typeof myArray != 'undefined' &&
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myArray[0] == 45 &&
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myArray[1] == 64 &&
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myArray[2] == 99
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) {
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return true;
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} else {
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return false;
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}
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})()
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);
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```
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你应该使用正确的索引修改`myArray`的值。
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```js
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assert(
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(function () {
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if (code.match(/myArray\[0\]\s*=\s*/g)) {
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return true;
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} else {
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return false;
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}
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})()
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);
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```
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# --seed--
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## --after-user-code--
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```js
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if(typeof myArray !== "undefined"){(function(){return myArray;})();}
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```
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## --seed-contents--
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```js
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// Setup
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var myArray = [18,64,99];
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// Only change code below this line
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```
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# --solutions--
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```js
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var myArray = [18,64,99];
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myArray[0] = 45;
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```
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