var users = [
{name: "張含韻", "email": "zhang@email.com"},
{name: "江一燕",? "email": "jiang@email.com"},
{name: "李小璐",? "email": "li@email.com"}
];
var emails = users.map(function (item) { return item.email; });
var users = [
{name: "張含韻", "email": "zhang@email.com"},
{name: "江一燕",? "email": "jiang@email.com"},
{name: "李小璐",? "email": "li@email.com"}
];
var emails = users.map(function (item) { return item.email; });