是否有一个聪明的(即优化)方法重命名一个关键在javascript对象?
一种非优化的方式是:
o[ new_key ] = o[ old_key ];
delete o[ old_key ];
是否有一个聪明的(即优化)方法重命名一个关键在javascript对象?
一种非优化的方式是:
o[ new_key ] = o[ old_key ];
delete o[ old_key ];
当前回答
重命名对象键的另一种方法:
让我们考虑这个对象:
let obj = {"name": "John", "id": 1, "last_name": "Doe"}
让我们重命名name key为first_name:
let { name: first_name, ...rest } = obj;
obj = { first_name, ...rest }
现在对象是:
{"first_name": "John", "id": 1, "last_name": "Doe"}
其他回答
这是我对pomber函数做的一个小修改; 为了能够获取一个对象数组而不是单独的对象,你也可以激活索引。此外,“键”也可以由数组分配
function renameKeys(arrayObject, newKeys, index = false) {
let newArray = [];
arrayObject.forEach((obj,item)=>{
const keyValues = Object.keys(obj).map((key,i) => {
return {[newKeys[i] || key]:obj[key]}
});
let id = (index) ? {'ID':item} : {};
newArray.push(Object.assign(id, ...keyValues));
});
return newArray;
}
test
const obj = [{ a: "1", b: "2" }, { a: "5", b: "4" } ,{ a: "3", b: "0" }];
const newKeys = ["A","C"];
const renamedObj = renameKeys(obj, newKeys);
console.log(renamedObj);
尝试使用lodash transform。
var _ = require('lodash');
obj = {
"name": "abc",
"add": "xyz"
};
var newObject = _.transform(obj, function(result, val, key) {
if (key === "add") {
result["address"] = val
} else {
result[key] = val
}
});
console.log(obj);
console.log(newObject);
function iterate(instance) {
for (let child of instance.tree_down) iterate(child);
instance.children = instance.tree_down;
delete instance.tree_down;
}
iterate(link_hierarchy);
console.log(link_hierarchy);
const data = res
const lista = []
let newElement: any
if (data && data.length > 0) {
data.forEach(element => {
newElement = element
Object.entries(newElement).map(([key, value]) =>
Object.assign(newElement, {
[key.toLowerCase()]: value
}, delete newElement[key], delete newElement['_id'])
)
lista.push(newElement)
})
}
return lista
您可以使用实用程序来处理这个问题。
npm i paix
import { paix } from 'paix';
const source_object = { FirstName: "Jhon", LastName: "Doe", Ignored: true };
const replacement = { FirstName: 'first_name', LastName: 'last_name' };
const modified_object = paix(source_object, replacement);
console.log(modified_object);
// { Ignored: true, first_name: 'Jhon', last_name: 'Doe' };