Javascript/Lodash/Redux-从对象返回具有特定ID的对象 [英] Javascript/Lodash/Redux - return object with specific id from an object

问题描述

所以可以说我们有一个对象:

So lets say we have an object:

names:
    {
     0: {"id": 30, name: "Adam"},
     1: {"id": 1, name: "Ben"},
     2: {"id": 15, name: "John"},
     ...
    }

并使用lodash get函数将特定名称保存为常量.

and using lodash get function I want to save specific name into constant.

const name = _.get(state, ['names', nameId]);

我知道这将不起作用，因为我正在选择对象的键而不是ID.知道如何解决吗?请注意，我无法像使用id作为对象的键那样规范化数据，因为它破坏了那些数据来自BE的顺序.是否可以遍历对象并查找特定的id?

I know this will not work because I'm selecting the key of the object not the id. Any idea how to fix it ? Note that I can't normalize the data like use the id as a key of the object because it ruins the order in which those data come from BE. Is it possible to loop through the object and look for the specific id ?

我正确地从其他功能获得了nameId

I'm getting the nameId correctely from other function

推荐答案

无需Lodash.只需遍历对象的属性，以查找id上的匹配项:

No need for Lodash. Just loop through the object's properties looking for a match on id:

const names = {
 0: {"id": 30, name: "Adam"},
 1: {"id": 1, name: "Ben"},
 2: {"id": 15, name: "John"}
};
const nameId = 1;
let obj;
for (const name in names) {
  if (names[name].id == nameId) {
    obj = names[name];
    break;
  }
}
console.log(obj);

或者使用Object.keys和some，但是除了跳过继承的属性外，它实际上并不会给您带来其他好处:

Or using Object.keys and some, but it doesn't really buy you anything other than skipping inherited properties:

const names = {
 0: {"id": 30, name: "Adam"},
 1: {"id": 1, name: "Ben"},
 2: {"id": 15, name: "John"}
};
const nameId = 1;
let obj;
Object.keys(names).some(name => {
  if (names[name].id == nameId) {
    obj = names[name];
    return true;
  }
});
console.log(obj);

或使用ES2017的 Object.values (对于较旧的环境很容易填充)和find:

Or using ES2017's Object.values (which is easily polyfilled for older environments) and find:

const names = {
 0: {"id": 30, name: "Adam"},
 1: {"id": 1, name: "Ben"},
 2: {"id": 15, name: "John"}
};
const nameId = 1;
const obj = Object.values(names).find(entry => entry.id == nameId);
console.log(obj);

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