无法使用lodash过滤器过滤非空数组数据 [英] Unable to filter the non empty array data using lodash filter

问题描述

一个数组如下:

    const arr = [ { name: 'Aditya', hobbies: ['Football', 'Basketball'] }, 
                  { name: 'Amitabh', hobbies: [] },
                  { name: 'Akhsara', hobbies: ['Basketball'] },
                  { name: 'Aia', hobbies: [] }
                ];

使用过滤器功能如下:

     public getDatas(hobby) {        
      const data =  _.filter(arr, {hobbies : hobby === 'Unclear' : [] ? [hobby]} );     
    }

我有一些方法将Unclear爱好设置为空数组，当它是Unclear时，它是不用hobbies : []返回我的数据，而是返回了整个 arr .

I have some how set the Unclear hobbies to empty arrays, when it is Unclear then it is NOT returning me the data with hobbies : [] instead it is returning me the whole of arr.

推荐答案

_.filter的谓词(第二个参数)指示要过滤的一个或多个属性.由于hobbies是字符串数组，所以没有hobbies的hobby属性.

The predicate (second argument) of _.filter indicates the property or properties to filter. Since hobbies is a string array, there is no hobby property of hobbies.

您可以使用 Array.prototype.包括，例如:

const data = _.filter(arr, item => item.hobbies.includes('Unclear'));

// If you want to extract just the 'hobbies' object, not the parent
const hobbies = _.map(data, 'hobbies');

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