javascript - 从多维数组中获取值

Question

我有一个数组，我只想从中获取名称。

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

如何使用逗号分隔从每个对象中获取名称？

Answer 1

在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

这肯定会在纯 Javascript 中完成：

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());