JavaScript中的合并和分组对象属性
假设我们有一个像这样的对象数组-
const arr = [
{name: 'lorem', age: 20, color:'red'},
{name: 'lorem', weight: 1, height:5} ,
{name: 'hello', ipsum : 'dolor'}
];我们需要编写一个JavaScript函数，该函数接受一个这样的对象数组。该函数应将具有“name”属性值的那些对象的所有属性分组。
例如-
对于上面的数组，输出应类似于-
const output = [
{name: 'lorem', age : 20, color: 'red', weight : 1, height : 5},
{name: 'hello', ipsum : 'dolor'}
];示例
为此的代码将是-
const arr = [
{name: 'lorem', age: 20, color:'red'},
{name: 'lorem', weight: 1, height:5} ,
{name: 'hello', ipsum : 'dolor'}
];
const mergeList = (arr = []) => {
const temp = {};
arr.forEach(elem => {
let name = elem.name;
delete elem.name;
temp[name] = { ...temp[name], ...elem };
});
const res = [];
Object.keys(temp).forEach(key => {
let object = temp[key];
object.name = key;
res.push(object);
});
return res;
};
console.log(mergeList(arr));输出结果
控制台中的输出将是-
[
{ age: 20, color: 'red', weight: 1, height: 5, name: 'lorem' },
{ ipsum: 'dolor', name: 'hello' }
]