freeCodeCamp/curriculum/challenges/chinese/02-javascript-algorithms-and-data-structures/basic-data-structures/generate-an-array-of-all-object-keys-with-object.keys.chinese.md
Kristofer Koishigawa b3213fc892 fix(i18n): chinese test suite (#38220)
* fix: Chinese test suite

Add localeTiltes, descriptions, and adjust test text and testStrings to get the automated test suite working.

* fix: ran script, updated testStrings and solutions
2020-03-03 18:49:47 +05:30

1.9 KiB
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id, title, challengeType, videoUrl, localeTitle
id title challengeType videoUrl localeTitle
587d7b7d367417b2b2512b1e Generate an Array of All Object Keys with Object.keys() 1 使用Object.keys生成所有对象键的数组

Description

我们还可以使用Object.keys()方法生成一个数组,其中包含存储在对象中的所有键,并传入一个对象作为参数。这将返回一个数组,其中的字符串表示对象中的每个属性。同样,数组中的条目没有特定的顺序。

Instructions

完成编写getArrayOfUsers函数,以便它返回一个数组,该数组包含它作为参数接收的对象中的所有属性。

Tests

tests:
  - text: <code>users</code>对象仅包含<code>Alan</code>  <code>Jeff</code>  <code>Sarah</code>和<code>Ryan</code>
    testString: assert('Alan' in users && 'Jeff' in users && 'Sarah' in users && 'Ryan' in users && Object.keys(users).length === 4);
  - text: <code>getArrayOfUsers</code>函数返回一个数组,其中包含<code>users</code>对象中的所有键
    testString: assert((function() { users.Sam = {}; users.Lewis = {}; let R = getArrayOfUsers(users); return (R.indexOf('Alan') !== -1 && R.indexOf('Jeff') !== -1 && R.indexOf('Sarah') !== -1 && R.indexOf('Ryan') !== -1 && R.indexOf('Sam') !== -1 && R.indexOf('Lewis') !== -1); })() === true);

Challenge Seed

let users = {
  Alan: {
    age: 27,
    online: false
  },
  Jeff: {
    age: 32,
    online: true
  },
  Sarah: {
    age: 48,
    online: false
  },
  Ryan: {
    age: 19,
    online: true
  }
};

function getArrayOfUsers(obj) {
  // change code below this line

  // change code above this line
}

console.log(getArrayOfUsers(users));

Solution

// solution required