如何重命名 javascript 中的多维数组键？

Question

我正在尝试重命名此数组的键：

'oldname': [
       {"name": "cat", "category": "animal"}
       ,{"name": "dog", "category": "animal"}
       ,{"name": "pig", "category": "animal"}
           ],
 'oldname1': [
       {"name": "pikachu", "category": "pokemon"}
       ,{"name": "Arbok", "category": "pokemon"}
       ,{"name": "Eevee", "category": "pokemon"}
             ]

我试过这个代码：

        const obj = {oldKey: Object.values(result)};

        delete Object.assign(results, {newname: obj.oldKey})['oldname'];

        console.log(result);

但我做错了，因为我们不需要影响价值，它应该是这样的：

  'newname': [
       {"name": "cat", "category": "animal"}
       ,{"name": "dog", "category": "animal"}
       ,{"name": "pig", "category": "animal"}
           ],
  'newname1': [
       {"name": "pikachu", "category": "pokemon"}
       ,{"name": "Arbok", "category": "pokemon"}
       ,{"name": "Eevee", "category": "pokemon"}
             ]

使用 javascript 有更好的方法吗？

Answer 1

您可以使用 Object.entries 和 Object.fromEntries 来做到这一点

const replaceKeys = (data, mapping) =>
  Object.fromEntries(
    Object.entries(data).map(([k, v]) => [mapping[k] || k, v])
  )
  
const data1 = {
 oldName1: 1,
 oldName2: 2,
 anotherKey: 3
}

const mapping = {
  oldName1: 'newName1',
  oldName2: 'newName2'
}

console.log(replaceKeys(data1, mapping))

Answer 2

如果您不想创建新的 variable/array，您可以使用 for..of 循环和 Object.entries()，如下所示：

const
input = { 'oldname': [ {"name": "cat", "category": "animal"} ,{"name": "dog", "category": "animal"} ,{"name": "pig", "category": "animal"} ], 'oldname1': [ {"name": "pikachu", "category": "pokemon"} ,{"name": "Arbok", "category": "pokemon"} ,{"name": "Eevee", "category": "pokemon"} ] },
mapping = {'oldname':'newname','oldname1':'newname1'};

for(let [key,value] of Object.entries(input)) {
    input[mapping[key]] = value;
    delete input[key];
}

console.log( input );

否则你可以按如下方式进行：

const
input = { 'oldname': [ {"name": "cat", "category": "animal"} ,{"name": "dog", "category": "animal"} ,{"name": "pig", "category": "animal"} ], 'oldname1': [ {"name": "pikachu", "category": "pokemon"} ,{"name": "Arbok", "category": "pokemon"} ,{"name": "Eevee", "category": "pokemon"} ] },
mapping = {'oldname':'newname','oldname1':'newname1','oldname2':'newname2','oldnamen':'newnamen'},

output = Object.fromEntries(
    Object.entries(mapping).map(([oldname,newname]) => [newname, input[oldname]])
    .filter(([,value]) => value)
);

console.log( input );

如何重命名 javascript 中的多维数组键？

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