如何从这个 json 数组中获取包含 "eJx2" 的标题中的 user_name？

Question

我想从其中一个包含“eJx2”的文件中获取 user_name。我有这段代码，但这段代码打印了所有“user_name”。我只想获取其中包含“eJx2”的那些 user_name。

var titles = arry.data.map(el => el.title);
for (var k in titles) {
    var never = titles[k].includes('eJx2');
    if (never) {
        var names = arry.data.map(el => el.user_name);
        console.log(names);
    }
}

这是 json :

   {
  data: [
    {
      id: '46475273517',
      user_name: 'testtwo',
      title: 'Hello this is my test for the eJx2',
      is_set: true
    },
    {
      id: '46471542013',
      user_name: 'testone',
      title: 'Hello this is my test for the eJx3',
      is_set: false
    },
    {
      id: '46474254233',
      user_name: 'testthree',
      title: 'Hello this is my test for the eJx7',
      is_set: false
    }
  ],
  pagination: {
    cursor: 'eyJiIjp7IkN1cnNvciI6ImV5SnpJam80TXpBeExqSTBNemcwTVRnME56WTVOQ3dpWkNJNlptRnNjMlVzSW5RaU9uUnlkV1Y5In0sImEiOnsiQ3Vyc29yIjoiZXlKeklqbzFOREV1T1RnMk56STNNall5TkRReE5Dd2laQ0k2Wm1Gc2MyVXNJblFpT25SeWRXVjkifX0'
  }
}

Answer 1

使用数组filter

array.data.filter(item => item.title.includes("eJx2"))

var array = {
  data: [
    {
      id: '46475273517',
      user_name: 'testtwo',
      title: 'Hello this is my test for the eJx2',
      is_set: true
    },
    {
      id: '46471542013',
      user_name: 'testone',
      title: 'Hello this is my test for the eJx3',
      is_set: false
    },
    {
      id: '46474254233',
      user_name: 'testthree',
      title: 'Hello this is my test for the eJx7',
      is_set: false
    }
  ],
  pagination: {
    cursor: 'eyJiIjp7IkN1cnNvciI6ImV5SnpJam80TXpBeExqSTBNemcwTVRnME56WTVOQ3dpWkNJNlptRnNjMlVzSW5RaU9uUnlkV1Y5In0sImEiOnsiQ3Vyc29yIjoiZXlKeklqbzFOREV1T1RnMk56STNNall5TkRReE5Dd2laQ0k2Wm1Gc2MyVXNJblFpT25SeWRXVjkifX0'
  }
}

var filteredData = array.data.filter(item => item.title.includes("eJx2"))

console.log(filteredData)

Answer 2

使用filter()过滤标题有'eJx2'和map()只得到user_name:

 const arry = {
  data: [
    {
      id: '46475273517',
      user_name: 'testtwo',
      title: 'Hello this is my test for the eJx2',
      is_set: true
    },
    {
      id: '46471542013',
      user_name: 'testone',
      title: 'Hello this is my test for the eJx3',
      is_set: false
    },
    {
      id: '46474254233',
      user_name: 'testthree',
      title: 'Hello this is my test for the eJx7',
      is_set: false
    }
  ],
  pagination: {
    cursor: 'eyJiIjp7IkN1cnNvciI6ImV5SnpJam80TXpBeExqSTBNemcwTVRnME56WTVOQ3dpWkNJNlptRnNjMlVzSW5RaU9uUnlkV1Y5In0sImEiOnsiQ3Vyc29yIjoiZXlKeklqbzFOREV1T1RnMk56STNNall5TkRReE5Dd2laQ0k2Wm1Gc2MyVXNJblFpT25SeWRXVjkifX0'
  }
}

const result = arry.data.filter(({title}) => title.includes("eJx2")).map(el => el.user_name)
console.log(result)

如何从这个 json 数组中获取包含 "eJx2" 的标题中的 user_name？

how to get user_name from the title that has "eJx2" in it from this json array?

javascript

arrays

json

for-loop