过滤对象键和值答案

【问题标题】：Filtering object keys and values过滤对象键和值
【发布时间】：2019-07-06 23:55:00
【问题描述】：

我有一个看起来像这样的对象：

var myObj = {
    "account id": "123TRANS",
    "account name": "Optimus Prime",
    "creator id": "Prime",
    "contact tel": 08915243209,
    "house no": 209,
    "is registered": true,
    "price": 398.83,
    "first name": "paul",
    "last name": "jones",
    "dob": "27-Jun-1978 00:00:00",
    "previous orders": true,
    "average price": 123.78,
    "lace colour": "blue",
    "first line": "Jupiter Close",
    "city": "New York",
    "alias": "Jupiter",
    "role": "Accountant"
}

在我的 HTML 页面上，我有一个 <input> 字段，用户可以在其中输入文本（至少需要 3 个字符）。我应该能够根据输入的字符串匹配上面的整个对象。

例如，如果 string = "Prime" 响应为：

{
    "account name": "Optimus Prime",
    "creator id": "Prime",
}

例如，string = "acc" 响应为：

{
    "account id": "123TRANS",
    "account name": "Optimus Prime",
    "role": "Accountant"
}

例如，string = "209" 响应为：

{
    "contact tel": 08915243209,
    "house no": 209,
}

我尝试过使用.reduce，但是结果好坏参半：

var myObject = {from above};
var filter = 'prime';

myObject = Object.keys(myObject).reduce((r, e) => {
    // Avoid int/float/bool and check key + value
    if(e !== 'contact tel' &&
       e !== 'house no' &&
       e !== 'previous orders') {

       // Check Key or Value for filter
       if(myObject[e].toLowerCase().includes(filter.toLowerCase) || e.toLowerCase().includes(filter.toLowerCase())) {
           r[e] = myObject[e]
       }
    }

    // Check int/float/bool and check key
    if(e === 'contact tel' ||
       e === 'house no' ||
       e === 'previous orders') {

       // Check Key or Value for filter
       if(e.toLowerCase().includes(filter.toLowerCase())) {
           r[e] = myObject[e]
       }
    }

    return r;  

}, {})

我也可以访问 lodash 但是找不到任何检查键和值的东西，只有键或值。

【问题讨论】：

那些引号不正确——不是 JS 使用的引号——应该是 ' 和 "
我也很好奇——这里[performance]的方面是什么？
等等，这里的问题是什么？我开始阅读示例和代码，但是……没有任何问题。有一些数据，有一些示例响应，但是 - 这是要求吗？这就是现在生产的东西吗？怎么了？什么是正确的？这里需要什么？

标签： javascript performance lodash javascript-objects

【解决方案1】：

您可以获取条目、过滤键和值并构建一个新对象作为结果。

function find(object, search) {
    search = search.toLowerCase();
    return Object.assign(...Object
        .entries(object)
        .filter(a => a.some(s => s.toString().toLowerCase().includes(search)))
        .map(([k, v]) => ({ [k]: v }))
    );
}

var myObj = { "account id": "123TRANS", "account name": "Optimus Prime", "creator id": "Prime", "contact tel": "08915243209", "house no": 209, "is registered": true, price: 398.83, "first name": "paul", "last name": "jones", dob: "27-Jun-1978 00:00:00", "previous orders": true, "average price": 123.78, "lace colour": "blue", "first line": "Jupiter Close", city: "New York", alias: "Jupiter", role: "Accountant" };

console.log(find(myObj, 'ACC'));

【讨论】：

【解决方案2】：

var myObj = {
    "account id": "123TRANS",
    "account name": "Optimus Prime",
    "creator id": "Prime",
    "contact tel": 08915243209,
    "house no": 209,
    "is registered": true,
    "price": 398.83,
    "first name": "paul",
    "last name": "jones",
    "dob": "27-Jun-1978 00:00:00",
    "previous orders": true,
    "average price": 123.78,
    "lace colour": "blue",
    "first line": "Jupiter Close",
    "city": "New York",
    "alias": "Jupiter",
    "role": "Accountant"
},
filterString = 'prime';
Object.entries(myObj)
  .filter((elem) => {
    return (elem.join('').toLowerCase().indexOf(filterString) > -1);
  })
  .reduce((accumulator, [key, value]) => {
    accumulator[key] = value;
    return accumulator;
  }, {});`

【讨论】：

【解决方案3】：

您可以使用_.pickBy() 根据包含文本的键或值获取子对象：

const findInObj = (obj, str) => {
  const pattern = new RegExp(str, 'i')
  return _.pickBy(obj, (v, k) => pattern.test(v) || pattern.test(k))
}

const myObj = {"account id":"123TRANS","account name":"Optimus Prime","creator id":"Prime","contact tel":8915243209,"house no":209,"is registered":true,"price":398.83,"first name":"paul","last name":"jones","dob":"27-Jun-1978 00:00:00","previous orders":true,"average price":123.78,"lace colour":"blue","first line":"Jupiter Close","city":"New York","alias":"Jupiter","role":"Accountant"}

const result = findInObj(myObj, 'acc')

console.log(result)

&lt;script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.min.js"&gt;&lt;/script&gt;

【讨论】：