从http://www.w3schools.com复制和粘贴，不需要JQuery开销。

var person = {fname:"John", lname:"Doe", age:25};

var text = "";
var x;
for (x in person) {
    text += person[x];
}

结果:无名氏25人

取自jQuery文档:

var arr = [ "one", "two", "three", "four", "five" ];
var obj = { one:1, two:2, three:3, four:4, five:5 };

jQuery.each(arr, function() {
  $("#" + this).text("My id is " + this + ".");
  return (this != "four"); // will stop running to skip "five"
});

jQuery.each(obj, function(i, val) {
  $("#" + i).append(document.createTextNode(" - " + val));
});

mootools的例子:

var ret = JSON.decode(jsonstr);

ret.each(function(item){
    alert(item.id+'_'+item.classd);
});

var arr = [{" id ":“10”,“类”:" child-of-9 "}, {" id ":“11”,“类”:“child-of-10”}); For (var I = 0;I < arrr .length;我+ +){ 文档。写("<br><br>数组索引:" + i); Var obj = arr[i]; For (var key in obj){ Var值= obj[key]; 文档。Write ("<br> - " + key + ": " + value "); ｝ ｝

注意:for-in方法对于简单对象很酷。与DOM对象一起使用不是很明智。

从http://www.w3schools.com复制和粘贴，不需要JQuery开销。

var person = {fname:"John", lname:"Doe", age:25};

var text = "";
var x;
for (x in person) {
    text += person[x];
}

结果:无名氏25人

对于嵌套对象，可以通过递归函数检索:

function inside(events)
  {
    for (i in events) {
      if (typeof events[i] === 'object')
        inside(events[i]);
      else
      alert(events[i]);
    }
  }
  inside(events);

其中as events是json object。