javascript - 深度过滤 JavaScript 数组中的对象

Question

在下面的代码中，我只需要返回其中包含 meta.menu 的对象，同时保留结构。

因此，在下面的情况下，只有带有“panel.users.view”的对象才会被删除。我尝试过创建一个递归函数来遍历它，但我不知道如何无限遍历它，因为可能有更多的对象。我不知道路线对象可以达到多少层深度。

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。

非常感谢您的帮助，非常感谢!

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: {},
                    },
                ],
            }
        ],
    }
];

Answer 1

你可以想象一个看起来像这样的递归函数。

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))