Angular2从对象数组中获取值

Question

如何从此数组中获取值？我想从每个Object值中取firstPersonName。

我写了这样的事情

var rest = email.map(a => { 
    a.firstPersonEmail; 
}); 
console.log(rest); 

但我正在逐渐

感谢所有帮助:)

Answer 1

这可以帮助你：

var rest = email.map(a => { 
    return a.firstPersonEmail; 
}); 
console.log(rest); 

或

var rest = email.map(a => a.firstPersonEmail); 
console.log(rest); 

const email = [ 
 
    {id:1, firstPersonEmail: "John@mail.mail"}, 
 
    {id:2, firstPersonEmail: "John2@mail.mail"}, 
 
    {id:3, firstPersonEmail: "John3@mail.mail"} 
 
]; 
 

 
const emptyEmail = []; 
 

 
console.log(`Email length: ${email.length}`); 
 
console.log(`Empty Email length: ${emptyEmail.length}`); 
 

 
const rest = email.map(a => a.firstPersonEmail); 
 
const emptyRest = emptyEmail.map(a => a.firstPersonEmail); 
 

 
console.log(rest); 
 
console.log(emptyRest);