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>
72 lines
1.2 KiB
Markdown
72 lines
1.2 KiB
Markdown
---
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id: 56bbb991ad1ed5201cd392cb
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title: 使用 push() 操作数组
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challengeType: 1
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videoUrl: 'https://scrimba.com/c/cnqmVtJ'
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forumTopicId: 18237
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dashedName: manipulate-arrays-with-push
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---
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# --description--
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一个简单的方法将数据添加到一个数组的末尾是通过`push()`函数。
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`.push()`接受一个或多个参数，并把它“推”入到数组的末尾。
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```js
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var arr = [1,2,3];
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arr.push(4);
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// arr is now [1,2,3,4]
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```
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# --instructions--
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把`["dog", 3]`“推”入到`myArray`变量的末尾。
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# --hints--
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`myArray`应该等于`[["John", 23], ["cat", 2], ["dog", 3]]`。
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```js
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assert(
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(function (d) {
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if (
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d[2] != undefined &&
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d[0][0] == 'John' &&
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d[0][1] === 23 &&
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d[2][0] == 'dog' &&
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d[2][1] === 3 &&
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d[2].length == 2
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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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})(myArray)
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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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(function(z){return 'myArray = ' + JSON.stringify(z);})(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 = [["John", 23], ["cat", 2]];
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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 = [["John", 23], ["cat", 2]];
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myArray.push(["dog",3]);
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```
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