Json 遍历记录字符，而不是键值

Question

我正在尝试使用以下代码遍历 JSON 对象：

traverse(json, process);
//called with every property and it's value
function process(key, value) {
    console.log(key + " : " + value);
}
function traverse(o, func) {
    for (var i in o) {
        func.apply(this, [i, o[i]]);
        if (o[i] !== null && typeof (o[i]) == "object") {
            //going on step down in the object tree!!
            traverse(o[i], func);
        }
    }
}

下面是 JSON 对象：

{"breakfast_menu":{"food":[{"name":["Belgian Waffles"],"price":["$5.95"],"description":["Two of our famous Belgian Waffles with plenty of real maple syrup"],"calories":["650"]},{"name":["Strawberry Belgian Waffles"],"price":["$7.95"],"description":["Light Belgian waffles covered with strawberries and whipped cream"],"calories":["900"]},{"name":["Berry-Berry Belgian Waffles"],"price":["$8.95"],"description":["Light Belgian waffles covered with an assortment of fresh berries and whipped cream"],"calories":["900"]},{"name":["French Toast"],"price":["$4.50"],"description":["Thick slices made from our homemade sourdough bread"],"calories":["600"]},{"name":[  "Homestyle Breakfast"],"price":["$6.95"],"description":["Two eggs, bacon or sausage, toast, and our ever-popular hash browns"],"calories":["950"]}]}}

它为我打印的结果如下：

> 748 : s 
> 749 : t 
> 750 : , 
> 751 : 
> 752 : a 
> 753 : n 
> 754 : d 
> 755 : 
> 756 : o
> 757 : u 
> 758 : r 
> 759 : 
> 760 : e 
> 761 : v 
> 762 : e 
> 763 : r 
> 764 : - 
> 765 : p

我的预期结果是打印值，例如

> key : value

Answer 1

问题是我的JSON是一个字符串而不是一个对象。以下是解决它的代码：

JSON.parse(jsonString);