从未知的json获得价值

Question

我只需要值.how从这些json中获取值

-wafer,
-Compound Chocolate,
-Praline Chcolate
etc.....

在这个主要问题是＆＃34;子类别＆＃34;它的值取自数据库，根据数据库的变化

[{"subcategory":"Wafer"},{"subcategory":"Compound Chocolate"},{"subcategory":"Praline Chcolate"},{"subcategory":"Cookies"},{"subcategory":"Toffee"},{"subcategory":"Eclair"},{"subcategory":"Fruit Chews"}] 

每个json都有一个像子类别

的值

Answer 1

小提琴：http://jsfiddle.net/KGms7/

var str = '[{"subcategory":"Wafer"},{"subcategory":"Compound Chocolate"},{"subcategory":"Praline Chcolate"},{"subcategory":"Cookies"},{"subcategory":"Toffee"},{"subcategory":"Eclair"},{"subcategory":"Fruit Chews"}]';
var jsn = JSON.parse(str);

var arr = [];
for(var i in jsn) {
    arr.push(jsn[i].subcategory);
}
alert(arr);