Question

我有一个使用stringify转换的javascript对象，看起来像这样..

var myJSON = JSON.stringify(response);

{"0":{"trigger":17},"1":{"trigger":3},"2":{"trigger":40},"3":{"trigger":4},"4":{"trigger":19},"5":{"trigger":70},"6":{"trigger":80},"7":{"trigger":0},"8":{"trigger":0},"9":{"trigger":5},"10":{"trigger":4}}

我正在尝试创建一个数组但只包含trigger的值。

我应该循环通过响应并以这种方式执行，还是有更好的方式来映射？

Answer 1

您可以在map上使用Object.values方法。

＆＃13;

const json = {"0":{"trigger":17},"1":{"trigger":3},"2":{"trigger":40},"3":{"trigger":4},"4":{"trigger":19},"5":{"trigger":70},"6":{"trigger":80},"7":{"trigger":0},"8":{"trigger":0},"9":{"trigger":5},"10":{"trigger":4}}

const arr = Object.values(json).map(({trigger}) => trigger);
console.log(arr)

＆＃13;

Answer 2

您可以使用Object.values从对象获取所有值，然后对集合应用Array.map以仅获取trigger的值：

const obj = {"0":{"trigger":17},"1":{"trigger":3},"2":{"trigger":40},"3":{"trigger":4},"4":{"trigger":19},"5":{"trigger":70},"6":{"trigger":80},"7":{"trigger":0},"8":{"trigger":0},"9":{"trigger":5},"10":{"trigger":4}};

const arr = Object.values(obj).map(item => item.trigger);
console.log(arr);

Answer 3

使用class迭代对象并将值推送到NSNumber到另一个数组

＆＃13;

for..in

＆＃13;

Javascript JSON - 将项目转换为新数组

3 个答案: