我如何转换一个大对象数组与lodash?
var obj = {
22: {name:"John", id:22, friends:[5,31,55], works:{books:[], films:[],}
12: {name:"Ivan", id:12, friends:[2,44,12], works:{books:[], films:[],}
}
// transform to
var arr = [{name:"John", id:22...},{name:"Ivan", id:12...}]
当前回答
你可以这样做
var arr = _.values(obj);
有关文档请参见这里。
其他回答
如果您希望键(在本例中为id)作为每个数组项的属性保留，您可以这样做
const arr = _(obj) //wrap object so that you can chain lodash methods
.mapValues((value, id)=>_.merge({}, value, {id})) //attach id to object
.values() //get the values of the result
.value() //unwrap array of objects
_.toArray(obj);
输出为:
[
{
"name": "Ivan",
"id": 12,
"friends": [
2,
44,
12
],
"works": {
"books": [],
"films": []
}
},
{
"name": "John",
"id": 22,
"friends": [
5,
31,
55
],
"works": {
"books": [],
"films": []
}
}
]"
一个现代的本地解决方案，如果有人感兴趣:
const arr = Object.keys(obj).map(key => ({ key, value: obj[key] }));
或(不是IE):
const arr = Object.entries(obj).map(([key, value]) => ({ key, value }));
将对象转换为数组与纯JavaScript的(ECMAScript-2016)对象。
Var obj = { 22:{名称:“约翰”,id: 22岁的朋友:[55]5日31日,工作原理:{书:[]、电影:[]}}, 12:{名称:“伊万”,id: 12,朋友:[2,44岁,12],工作原理:{书:[]、电影:[]}} ｝ var values = Object.values(obj) console.log(值);
如果你还想保留键，使用Object。entry和array# map像这样:
Var obj = { 22:{名称:“约翰”,id: 22岁的朋友:[55]5日31日,工作原理:{书:[]、电影:[]}}, 12:{名称:“伊万”,id: 12,朋友:[2,44岁,12],工作原理:{书:[]、电影:[]}} ｝ var values = Object.entries(obj)。Map (([k, v]) => ({[k]: v})) console.log(值);
如果你想要一些对象到数组的自定义映射(比如原始的Array.prototype.map)，你可以使用_.forEach:
let myObject = {
key1: "value1",
key2: "value2",
// ...
};
let myNewArray = [];
_.forEach(myObject, (value, key) => {
myNewArray.push({
someNewKey: key,
someNewValue: value.toUpperCase() // just an example of new value based on original value
});
});
// myNewArray => [{ someNewKey: key1, someNewValue: 'VALUE1' }, ... ];
参见lodash doc of _。forEach https://lodash.com/docs/ # forEach
