内部字符串数组过滤器在数组对象与字符串数组

Question

var mainobj=[[{
"title": "Nifty News: Dapper Labs pursuing DAOs, Bundesliga partners with Sorare, and more. ",

"category": [
"Dapper Labs",
" Brud",
" Sorare",
" Bundesliga",
" Etched",
" Hockey Diversity Alliance",
" Archdiocese of Bangkok NFT"
],
"description": "Nifty News: Dapper Labs pursuing DAOs, Bundesliga partners with Sorare, and more. ",

},
{
"title": "Bitcoin returns to $1T asset as BTC price blasts to $55K",

"category": [
"Bitcoin",
" BTC price"
],
"description": "Bitcoin returns to $1T asset as BTC price blasts to $55K",

}]]
var categoryfilterArray=['Bitcoin','Bundesliga','Sorare']

我需要过滤器匹配mainobj中的categoryfilterArray

Answer 1

首先，我假设您实际上没有一个数组包含另一个数组，而是一个对象数组，如:

const mainobj = [
{
title: "Nifty News: Dapper Labs pursuing DAOs, Bundesliga partners with Sorare, and more. ",
category: [
"Dapper Labs",
"Brud",
"Sorare",
"Bundesliga",
"Etched",
"Hockey Diversity Alliance",
"Archdiocese of Bangkok NFT"
],
description: "Nifty News: Dapper Labs pursuing DAOs, Bundesliga partners with Sorare, and more. ",
},
{
title: "Bitcoin returns to $1T asset as BTC price blasts to $55K",
category: [
"Bitcoin",
"BTC price"
],
description: "Bitcoin returns to $1T asset as BTC price blasts to $55K",
}
];

从那里，您可以使用如下函数查看category数组和categoryfilterArray的交集:

const arrayIntersection = (array1, array2) => {
return array1.filter(x => array2.includes(x));
};

然后就看你如何比较交集了。

如果您试图找到categories包含所有categoryfilterArray值的对象，您可以将相交数组作为字符串进行比较:

const matchingObj = mainobj.filter(obj => {
return JSON.stringify(arrayIntersection(obj.category, categoryfilterArray)) === JSON.stringify(categoryfilterArray);
});

如果您只在交集中寻找一个或多个目标类别，您可以使用布尔转换:

const matchingObj = mainobj.filter(obj => {
return Boolean(arrayIntersection(obj.category, categoryfilterArray).length);
});

任何大于0的交集长度将返回true，并返回过滤器中的对象。或者，您可以检查arrayIntersection(obj.category, categoryfilterArray).length > 0。

示例:https://stackblitz.com/edit/angular-ivy-hew9bq?file=src/app/app.component.ts