如何过滤对象javascript中的数组值？答案

【问题标题】：How to filter array value in object javascript?如何过滤对象javascript中的数组值？
【发布时间】：2021-01-30 04:04:48
【问题描述】：

我有一个包含数组的对象，我想根据数组值过滤对象。

例如：

    {
       "sun":["sleep","walk"],
       "mon":["read","dance","ride"],
       "tue":["work","dance","sleep"],
    }

如果我输入关键字“睡眠”，那么结果应该如下

    {
      "sun":["sleep"],
      "tue":["sleep"],
    }

任何建议都会有所帮助

【问题讨论】：

你试过明显的吗：Object.entries -> Array.filter -> Object.fromEntries？
@Wyck 我对此不太了解，请您详细说明

标签： javascript object lodash

【解决方案1】：

只需遍历对象并进行操作，请在下面找到工作代码：

const obj = {
  "sun": ["sleep", 'walk'],
  "mon": ["read", "dance", "ride"],
  "tue": ["work", "dance", "sleep"],
}

function filterIt(filterString) {
  const result = {};
  for (const prop in obj) {
    if (obj[prop].includes(filterString)) {
      result[prop] = [filterString];
    }
  }
  return result;
}

const finalResult = filterIt('sleep');
console.log(finalResult);

【讨论】：

【解决方案2】：

解决这个问题的有用工具：

let obj =
{
  "sun": ["sleep", "walk"],
  "mon": ["read", "dance", "ride"],
  "tue": ["work", "dance", "sleep"],
};

let result = Object.fromEntries(
  Object.entries(obj)
    .filter(kvp => kvp[1].includes('sleep'))
    .map(([k, v]) => [k, v.filter(o => o === 'sleep')])
  )

console.log(result)

【讨论】：

【解决方案3】：

使用Object.keys、map、includes。

let obj ={
       "sun":["sleep","walk"],
       "mon":["read","dance","ride"],
       "tue":["work","dance","sleep"],
    }

let new_obj = {}
let search = 'sleep'

Object.keys(obj).map(key => {
     obj[key].includes(search) ? new_obj[key]=[search] : ''
})

console.log(new_obj)

【讨论】：

【解决方案4】：

您可以使用_.transform() 创建一个新对象。检查值数组 (v) 是否包含 str，以及它是否使用包含 str 的新数组分配键：

const fn = (obj, str) => _.transform(obj, (o, v, k) => {
  if(v.includes(str)) o[k] = [str]
})

const obj = {
  "sun":["sleep","walk"],
  "mon":["read","dance","ride"],
  "tue":["work","dance","sleep"],
}

const result = fn(obj, 'sleep')

console.log(result)

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【讨论】：