基于另一个对象数组创建对象数组 JavaScript
javascriptweb developmentfront end technologyobject oriented programming
假设，我们有一个对象数组，其中包含有关某些用户的喜好的数据，例如 −
const arr = [
{"user":"dan","liked":"yes","age":"22"},
{"user":"sarah","liked":"no","age":"21"},
{"user":"john","liked":"yes","age":"23"},
];
我们需要编写一个 JavaScript 函数来接收一个这样的数组。该函数应该基于此数组构造另一个数组，如下所示 −
const output = [
{"dan":"yes"},
{"sarah":"no"},
{"john":"yes"},
];
示例
const arr = [
{"user":"dan","liked":"yes","age":"22"},
{"user":"sarah","liked":"no","age":"21"},
{"user":"john","liked":"yes","age":"23"},
];
const mapToPair = (arr = []) => {
const result = arr.map(obj => {
const res = {};
res[obj['user']] = obj['liked'];
return res;
});
return result;
};
console.log(mapToPair(arr));
输出
控制台中的输出将是 −
[ { dan: 'yes' }, { sarah: 'no' }, { john: 'yes' } ]
