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
对我来说，这很有效:
_.map(_.toPairs(data), d => _.fromPairs([d]));
结果
{"a":"b", "c":"d", "e":"f"}
into
[{"a":"b"}, {"c":"d"}, {"e":"f"}]
其他回答
对我来说，这很有效:
_.map(_.toPairs(data), d => _.fromPairs([d]));
结果
{"a":"b", "c":"d", "e":"f"}
into
[{"a":"b"}, {"c":"d"}, {"e":"f"}]
2017年更新:对象。valuevalues, lodash values和toArray。为了保存键映射和展开操作符，请注意:
//从'lodash'导入{toArray, map} Const map = _.map Const input = { 关键:{ 价值:“价值” ｝ ｝ Const输出= map(input， (value, key) => ({ 键, 价值…… })) console.log(输出) // >> [{key: 'key'， value: 'value'}]) < script src = " https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.js " > < /脚本>
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
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
你可以这样做
var arr = _.values(obj);
有关文档请参见这里。
