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
为每个键添加前缀:
const obj = {foo: 'bar'}
const altObj = Object.fromEntries(
Object.entries(obj).map(([key, value]) =>
// Modify key here
[`x-${key}`, value]
)
)
// altObj = {'x-foo': 'bar'}
其他回答
简单地这么做会有什么问题吗?
someObject = {...someObject, [newKey]: someObject.oldKey}
delete someObject.oldKey
如果愿意,可以将其包装在函数中:
const renameObjectKey = (object, oldKey, newKey) => {
// if keys are the same, do nothing
if (oldKey === newKey) return;
// if old key doesn't exist, do nothing (alternatively, throw an error)
if (!object.oldKey) return;
// if new key already exists on object, do nothing (again - alternatively, throw an error)
if (object.newKey !== undefined) return;
object = { ...object, [newKey]: object[oldKey] };
delete object[oldKey];
return { ...object };
};
// in use
let myObject = {
keyOne: 'abc',
keyTwo: 123
};
// avoids mutating original
let renamed = renameObjectKey(myObject, 'keyTwo', 'renamedKey');
console.log(myObject, renamed);
// myObject
/* {
"keyOne": "abc",
"keyTwo": 123,
} */
// renamed
/* {
"keyOne": "abc",
"renamedKey": 123,
} */
还有一种最强大的REDUCE方法。
数据= {\ key1:“value1”,key2:“value2”,key3:“value3”}; 键文件夹= {\ key1:“firstkey”,key2:“secondkey”,key3:“thirdkey” mappedData = Object.keys . .还原((obj,k) =>对象。assign(obj, {\ [keyMap]]:数据[k]},{\}; 控制台日志(mappedData); 第一个“value1”、“secondkey”、“value2”、“thirdkey”、“value3”……
如果有人需要重命名属性列表:
function renameKeys(obj, newKeys) {
const keyValues = Object.keys(obj).map(key => {
const newKey = newKeys[key] || key;
return { [newKey]: obj[key] };
});
return Object.assign({}, ...keyValues);
}
用法:
const obj = { a: "1", b: "2" };
const newKeys = { a: "A", c: "C" };
const renamedObj = renameKeys(obj, newKeys);
console.log(renamedObj);
// {A:"1", b:"2"}
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
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);