Angular2從對象數組中獲取值

Question

如何從此數組中獲取值？我想從每個Object值中取firstPersonName。

我寫了這樣的事情

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

但我正在逐漸

感謝所有幫助:)

Answer 1

這可以幫助你：

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);