Typescript获取对象数组中的列值数组

Question

我必须从一个对象数组中获取数组。

数据

var result1 = [
    {id:1, name:'Sandra', type:'user', username:'sandra'},
    {id:2, name:'John', type:'admin', username:'johnny2'},
    {id:3, name:'Peter', type:'user', username:'pete'},
    {id:4, name:'Bobby', type:'user', username:'be_bob'}

我的守则

var data = result1.filter(x => x.id)

预期的O / P.

var data = [1,2,3,4]

我的代码没有返回预期的结果。 提前致谢

Answer 1

过滤器仅采用匹配值，您需要使用.map

var data = result1.map(x => x.id);

DEMO

 var result1 = [ {id:1, name:'Sandra', type:'user', username:'sandra'}, {id:2, name:'John', type:'admin', username:'johnny2'}, {id:3, name:'Peter', type:'user', username:'pete'}, {id:4, name:'Bobby', type:'user', username:'be_bob'}]; var data = result1.map(t=>t.id); console.log(data); 

Answer 2

你需要使用地图

var data = result1.map(x => x.id)