javascript数组中的深层过滤对象 [英] Deep filter objects in javascript array

问题描述

从下面的代码中，我只需要返回包含 meta.menu 的对象，同时保留结构.

From the following code below I need to return only the objects that have meta.menu in them while preserving the structure.

所以在下面的例子中，只有带有 "panel.users.view" 的对象会被删除.我已经尝试制作一个递归函数来遍历它，但我无法弄清楚如何无限地遍历它，因为可能有更多的对象.我不知道一个路由对象可以达到多少层.

So in the case below, only the object with "panel.users.view" would get removed. I've tried making a recursive function to traverse it but I can't figure out how to infinitely traverse it because there could be more objects. I don't know how many levels deep a routes object can get.

我还查看了 lodash 和 collect.js 以查看是否有可用于此目的的函数，但我无法找到解决方案我自己的.

I've also looked through lodash and collect.js to see if there were functions that could be used for this but I'm unable to find a solution on my own.

非常感谢您的帮助，非常感谢！

Would greatly appreciate the help, many thanks!

const routes = [
    {
        path: "/panel",
        name: "panel",
        redirect: { name: "panel.dashboard" },
        component: {},
        children: [
            {
                path: "/dashboard",
                name: "panel.dashboard",
                component: {},
                meta: {
                    menu: "main"
                },
            },
            {
                path: "/users",
                name: "panel.users",
                redirect: { name: "panel.dashboard" },
                component: {},
                children: [
                    {
                        path: "list",
                        name: "panel.users.list",
                        component: {},
                        meta: {
                            menu: "main"
                        },
                    },
                    {
                        path: "view/:user_id",
                        name: "panel.users.view",
                        component: {},
                    },
                ],
            }
        ],
    }
];

推荐答案

你可以想象一个递归函数，看起来像这样.

You could imagine a recursive function which would look something like.

const res = [];
function findMeta(rs) {
  rs.forEach(r => {
      for (let [key, value] of Object.entries(r)) {
        //console.log(`${key}`, value);
                if(key === "children") findMeta(value);
                if(key === "meta") res.push(r);
      }
  })
  return res;
}

const routes = [
    {
        path: "/panel",
        name: "panel",
        redirect: { name: "panel.dashboard" },
        component: {},
        children: [
            {
                path: "/dashboard",
                name: "panel.dashboard",
                component: {},
                meta: {
                    menu: "main"
                },
            },
            {
                path: "/users",
                name: "panel.users",
                redirect: { name: "panel.dashboard" },
                component: {},
                children: [
                    {
                        path: "list",
                        name: "panel.users.list",
                        component: {},
                        meta: {
                            menu: "main"
                        },
                    },
                    {
                        path: "view/:user_id",
                        name: "panel.users.view",
                        component: {},
                    },
                ],
            }
        ],
    }
];

const res = [];
function findMeta(rs) {
  rs.forEach(r => {
      for (let [key, value] of Object.entries(r)) {
        //console.log(`${key}`, value);
				if(key === "children") findMeta(value);
				if(key === "meta") res.push(r);
      }
  })
  return res;
}

console.log(findMeta(routes))

这篇关于javascript数组中的深层过滤对象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IT屋！