JS数组的遍历方法有两种：
一：一般的for循环，例如：
|
1
2
3
4
|
var
a =
new
Array(
"first"
,
"second"
,
"third"
)
for
(
var
i = 0;i < a.length; i++) {
document.write(a[i]+
","
);
}
|
输出的结果：fitst,second,third
二：用for...in 这种遍历的方式，例如：
|
1
2
3
4
|
var
arr =
new
Array(
"first"
,
"second"
,
"third"
)
for
(
var
item
in
arr) {
document.write(arr[item]+
","
);
}
|
输出的结果：fitst,second,third
jQuery 遍历json数组的实现代码
一、使用each遍历 var obj = [{ "name": "项海军", "password": "123456"}];
alert(obj); //是个object元素
//下面使用each进行遍历
$.each(obj, function (n, value) {
alert(n + ' ' + value);
var trs = "";
trs += "<tr><td>" + value.name + "</td> <td>" + value.password + "</td></tr>";
tbody += trs;
});
--------------------------------------------------------------------------------
var d1 =[{"text":"王家湾","value":"9"},{"text":"李家湾","value":"10"},{"text":"邵家湾","value":"13"}];
$(d1).each(function(){
alert(this.text+" "+this.value);
});
二、jquery遍历解析json对象：
var json = [{dd:'SB',AA:'东东',re1:123},{cccc:'dd',lk:'1qw'}];
for(var i=0,l=json.length;i<l;i++){
for(var key in json[i]){
alert(key+':'+json[i][key]);
}
}
三、jquery遍历解析json对象:
var obj ={”name”:”冯娟”,”password”:”123456″,”department”:”技术部”,”sex”:” 女”,”old”:30};
for(var p in obj){
str = str+obj[p]+',';
return str;
}
换言之:
通过标准JSON.parse()或jQuery 的 $.parseJSON 将其转换为JavaScript对象。
var
json =
'[{"id":"1","tagName":"apple"},{"id":"2","tagName":"orange"},
{"id":"3","tagName":"banana"},{"id":"4","tagName":"watermelon"},
{"id":"5","tagName":"pineapple"}]'
;
$.each(JSON.parse(json),
function
(idx, obj) {
alert(obj.tagName);
});
//or
$.each($.parseJSON(json),
function
(idx, obj) {
alert(obj.tagName);
});