我有一个projects
列表,如下所示:
projects = [{name: '1',
agencies: ['USA', 'China']},
{name: '2',
agencies: ['Japan', 'Russia']}]
我想得到结果
['USA', 'China', 'Japan', 'Russia']
,当前我使用以下代码,但是我想知道是否有使用map函数的更好的解决方案(一行代码):const agencies = [];
projects.forEach((project) =>
project.agencies.forEach((agency) => {
agencies.push(agency);
})
);
最佳答案
这是完成此操作的简单方法:
const projects = [{
name: '1',
agencies: ['USA', 'China']
}, {
name: '2',
agencies: ['Japan', 'Russia']
}]
const agencies = [].concat(...projects.map(x => x.agencies));
console.log(agencies)
关于javascript - 使用映射从数组的数组创建新数组的更好方法,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/48451621/