在对象中查找特定名称中的值

Question

如何从对象中获取特定值，这是我的示例对象和伪代码来获得我的预期结果：items = [    {code: "1", fruits: "APPLE", color: "red"},    {code: "2", fruits: "BANANA", color: "dummy"},    {code: "3", fruits: "BANANA", color: "anotherDummy"},    {code: "4", fruits: "ORANGE", color: "orange"}]items.find("BANANA")我应该循环它还是有一个可以轻松找到值的函数。预期结果：2,"BANANA","yellow"3,"BANANA","anotherDummy"

Answer 1

你可以你filter的数组

const items = [

  {code: "1", fruits: "APPLE", color: "red"},

  {code: "2", fruits: "BANANA", color: "dummy"},

  {code: "3", fruits: "BANANA", color: "anotherDummy"},

  {code: "4", fruits: "ORANGE", color: "orange"}

];

const keyword = 'BANANA';

const filter = items.filter(item => (item.code === keyword || item.fruits === keyword ||item.color === keyword));

console.log(filter);

也适用于多个过滤器/搜索

const items = [

  {code: "1", fruits: "APPLE", color: "red"},

  {code: "2", fruits: "BANANA", color: "dummy"},

  {code: "3", fruits: "BANANA", color: "anotherDummy"},

  {code: "4", fruits: "ORANGE", color: "orange"}

];

const keyword = ['APPLE', 'BANANA'];

const filter = items.filter(item => (

  keyword.includes(item.code)

  || keyword.includes(item.fruits)

  || keyword.includes(item.color)

));

console.log(filter);

Answer 2

希望这可以帮助 -

• 此代码将返回包含找到的项目的数组

• 这将比较每个项目的所有属性/键给出的值。

• 此外，最好创建自定义（创建 findCustom() 函数）而不是覆盖内置的 find() 方法。

   var items = [{code: "1", fruits: "APPLE", color: "red"},

    {code: "2", fruits: "BANANA", color: "dummy"},

    {code: "3", fruits: "BANANA", color: "anotherDummy"},

    {code: "4", fruits: "ORANGE", color: "orange"}]

    

    items.findCustom = (value) =>{

      let results = [];

      items.find((item) => {

      var listKeys = Object.keys(item);

      listKeys.forEach((keyName) => {

        if(item[keyName] == value) 

          results.push(item);

        

    })

    })

    return results;

    }

    console.log(items.findCustom("BANANA")) 

Answer 3

你可以使用filter方法

let filteredArray = items.filter(item => item.fruits ==='BANANA');

console.log(filteredArray);

更新

对于更多动态过滤器，您可以创建要查找的字符串列表让我们说：

let fruitsToFilter = ['BANANA', 'APPLE',...]

然后就可以使用像这样的过滤方法来实现动态过滤

let filteredArray = items.filter(item => fruitsToFilter.includes(item.fruits));

console.log(filteredArray);