如何从一个键获取对象，数组中的值

Question

我有以下代码返回是否在数组对象中找到键和值。

function iterate(array, prop, val) {
    Object.keys(array).forEach((key) => {
        if (key === prop && val === array[key]) {
            console.log(`key: ${key}, value: ${array[key]}`);
        }

        if (typeof array[key] === 'object') {
            iterate(array[key], prop, val);
        }
    });
}

没关系，但现在我想访问找到这些属性和值的特定对象的全部内容。这是我的 JSON：

[
   {
      "page":"main",
      "content":[
         {
            "type":"item",
            "item":[
               {
                  "name":"HAMMER",
                  "price":"1000"
               },
               {
                  "name":"SWORD",
                  "price":"2000"
               }
            ]
         }
      ]
   }
]

这就是我用我的功能寻找/得到的东西：

"name":"HAMMER"

这就是我需要的：

{
   "name":"HAMMER",
   "price":"1000"
},

有什么方法可以实现，还是我从错误的角度解决了这个问题？

Answer 1

您可以使用基本循环，从深层嵌套对象中查找项目...

let data = [{ "page": "main", "content": [{ "type": "item", "item": [{ "name": "HAMMER", "price": "1000" }, { "name": "SWORD", "price": "2000" }] }] }]
let [prop, value] = ["name", "HAMMER"]

loop: for (let page of data) {
    for (let type of page.content) {
        let found = type.item.find(v => v[prop] === value);
        if (found) {
            console.log(found)
            break loop;
        }
    }
}

你想递归查找吗？然后你可以使用生成器...

let data = [{ "page": "main", "content": [{ "type": "item", "item": [{ "name": "HAMMER", "price": "1000" }, { "name": "SWORD", "price": "2000" }] }] }]

function* iterate(arrayLike, prop, value) {
    for (let page of arrayLike) {
        if (page[prop] == value)
            yield page;

        for (let v of Object.values(page)) {
            if (Array.isArray(v))
                yield* iterate(v, prop, value)
        }
    }
}

for (let item of iterate(data, "name", "HAMMER")) {
    console.log(item)
}