在JavaScripts中从另一个数组创建对象的新数组

Question

从一个对象数组中，我需要创建另一个带有一些字段的对象数组。

在我的organicResults数组中，我有以下几项

我只需要标题和新数组中的url。我尝试了以下几种方法

​

 const organicResults = [ {
      title: '21 Excel Tips and Tricks to Boost Business | Process Street ...',
      url: 'https://www.process.st/excel-tips-and-tricks/',
      displayedUrl: 'www.process.st › excel-tips-and-tricks',
      description: 'Mar 10, 2017 — 90% of businesses use Excel in their operations. Learn these Excel tips and tricks to maximize your efficiency and automate your processes!',
      siteLinks: [],
      productInfo: {}
    },
    {
      title: 'Microsoft Excel Tips & Tricks | The Training Lady',
      url: 'https://www.thetraininglady.com/microsoft-excel/',
      displayedUrl: 'www.thetraininglady.com › microsoft-excel',
      description: 'When you are entering data in Excel you may want to ensure your data is entered in a consistent way. Maybe you have multiple people working on the same file ...',
      siteLinks: [],
      productInfo: {}
    },
    {
      title: 'What are the best Microsoft Excel tips according to you? - Quora',
      url: 'https://www.quora.com/What-are-the-best-Microsoft-Excel-tips-according-to-you',
      displayedUrl: 'www.quora.com › What-are-the-best-Microsoft-Excel-tips...',
      description: 'Originally Answered: What is the best microsoft excel tip according to you? Below is a listing of all the major shortcut keys usable in Microsoft Excel.64 answers',
      siteLinks: [],
      productInfo: {}
    },
]

    let sitesInfo = organicResults.map(result => ({
        title: result.title,
        url : result.url,
        description: result.description
        
    }))
    console.log(sitesInfo)

​

输出为空。

我哪里做错了？

Answer 1

您需要使用return

在sitesInfo部件上插入此内容

var sitesInfo = organicResults.map(results => {
var object = {
        title: result.title,
        url : result.url,
        description: result.description
    }
    return object;
});
console.log(sitesInfo)

告诉我这对你是否有效！：)

Answer 2

检查您的括号中的map方法..

let sitesInfo = organicResults.map(result => {
  return {
    title: result.title,
    url : result.url,
    description: result.description
  }
})

Answer 3

使用常规函数仍然更安全。

let sitesInfo = organicResults.map(function(el) {
  return {title: el.title, url: el.url, description: el.description}
})