從多維數組中獲取值

Question

我有一個數組，我只想從中獲取名稱。

var peoples = [ 
    { "name": "dod", "class": "a", "age": 12 }, 
    { "name": "john", "class": "b", "age": 14 }, 
    { "name": "henry", "class": "c", "age": 23 } 
]; 

如何從逗號分隔的每個對象中獲取名稱？

Answer 1

jQuery中，

var peoples = [ 
    { "name": "dod", "class": "a", "age": 12 }, 
    { "name": "john", "class": "b", "age": 14 }, 
    { "name": "henry", "class": "c", "age": 23 } 
]; 

var names = new Array(); 
$.each(peoples,function(key,value){ 
    names[key] = value.name; 
}); 
namelist = names.join(","); 
console.log(namelist); 

http://jsfiddle.net/9344Q/

Answer 2

這絕對會做到在普通的JavaScript：

var peoples = [ 
    { "name": "dod", "class": "a", "age": 12 }, 
    { "name": "john", "class": "b", "age": 14 }, 
    { "name": "henry", "class": "c", "age": 23 } 
]; 

var arr = []; 
peoples.forEach(function(name) { 
    arr.push(name['name']); 
}); 

console.log(arr.join(',')); 

Answer 3

var peoples = [ 
    { "name": "dod", "class": "a", "age": 12 }, 
    { "name": "john", "class": "b", "age": 14 }, 
    { "name": "henry", "class": "c", "age": 23 } 
]; 
alert(peoples.map(function(v){ return v.name; }).join());