如何在JS实现多串过滤？

How to Filter on multiple strings in JS?(如何在JS实现多串过滤？)

问题描述

我希望能够在一个数组中的多个字符串(类型)上过滤。例如，我想在过滤下面的数据结构中键入肉类和水果。 我要实现的是经过筛选的数据对象。

const data = [{type: "meat", food: "hamburger"}, {type:"fruit", food:"banana"}, {type:"fish", food: "red snapper"}, {type:"vegetables", food:"fungi"}]

let filter1 = 'meat'
let filter2 = 'fruit'

const filteredData = data.filter( post => post.type.includes(filter1, filter2) ? post:'');

// My expected result after filtering: [{type: "meat", food: "hamburger"}, {type:"fruit", food:"banana"}]

很遗憾，它返回%4个结果，而不是上面预期的%2。

我知道如何在_underscore.js这样的库中处理此问题，但我希望在现代ECMAScript中实现它。

推荐答案

创建要首先包括的type数组，然后可以对该数组使用.includes测试。(当前，您的post.type.includes(filter1, filter2)不起作用，因为includes只接受一个参数)

const data = [{type: "meat", food: "hamburger"}, {type:"fruit", food:"banana"}, {type:"fish", food: "red snapper"}, {type:"vegetables", food:"fungi"}]

let filter1 = 'meat'
let filter2 = 'fruit'

const filters = [filter1, filter2];

const filteredData = data.filter(({ type }) => filters.includes(type));
console.log(filteredData);

您还可以使用Set来降低运行时复杂性

const data = [{type: "meat", food: "hamburger"}, {type:"fruit", food:"banana"}, {type:"fish", food: "red snapper"}, {type:"vegetables", food:"fungi"}]

let filter1 = 'meat'
let filter2 = 'fruit'

const filters = new Set([filter1, filter2]);

const filteredData = data.filter(({ type }) => filters.has(type));
console.log(filteredData);

这篇关于如何在JS实现多串过滤？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持编程学习网！