freeCodeCamp/curriculum/challenges/chinese/02-javascript-algorithms-and-data-structures/basic-javascript/manipulate-arrays-with-push.md

id, title, challengeType, videoUrl, forumTopicId, dashedName

id	title	challengeType	videoUrl	forumTopicId	dashedName
56bbb991ad1ed5201cd392cb	使用 push 方法操作数组	1	https://scrimba.com/c/cnqmVtJ	18237	manipulate-arrays-with-push

--description--

An easy way to append data to the end of an array is via the push() method.

The push() method takes one or more arguments and appends them to the end of the array, in the order in which they appear. It returns the new length of the array.

示例：

const arr1 = [1, 2, 3];
arr1.push(4, 5);

const arr2 = ["Stimpson", "J", "cat"];
arr2.push(["happy", "joy"]);

arr1 now has the value [1, 2, 3, 4, 5] and arr2 has the value ["Stimpson", "J", "cat", ["happy", "joy"]].

--instructions--

把["dog", 3] 压入到 myArray 变量的末尾。

--hints--

myArray 现在应该等于 [["John", 23], ["cat", 2], ["dog", 3]]。

assert(
  (function (d) {
    if (
      d[2] != undefined &&
      d[0][0] == 'John' &&
      d[0][1] === 23 &&
      d[2][0] == 'dog' &&
      d[2][1] === 3 &&
      d[2].length == 2
    ) {
      return true;
    } else {
      return false;
    }
  })(myArray)
);

--seed--

--after-user-code--

(function(z){return 'myArray = ' + JSON.stringify(z);})(myArray);

--seed-contents--

// Setup
const myArray = [["John", 23], ["cat", 2]];

// Only change code below this line

--solutions--

const myArray = [["John", 23], ["cat", 2]];
myArray.push(["dog",3]);