样例数据：var jsonData = [{"id":"1","pid":"0","name":"家用电器"}, {"id":"4","pid":"1","name":"大家电"}, {"id":"5","pid":"1","name":"生活电器"}, {"id":"2","pid":"0","name":"服饰"}, {"id":"3","pid":"0","name":"化妆"}, {"id":"7","pid":"4","name":"空调"}, {"id":"8","pid":"4","name":"冰箱"}, {"id":"9","pid":"4","name":"洗衣机"}, {"id":"10","pid":"4","name":"热水器"}, {"id":"11","pid":"3","name":"面部护理"}, {"id":"12","pid":"3","name":"口腔护理"}, {"id":"13","pid":"2","name":"男装"}, {"id":"14","pid":"2","name":"女装"}, {"id":"15","pid":"7","name":"海尔空调"}, {"id":"16","pid":"7","name":"美的空调"}, {"id":"19","pid":"5","name":"加湿器"}, {"id":"20","pid":"5","name":"电熨斗"}]
2、实现方法：
function creatTreeData(list){
var clonelist = JSON.parse(JSON.stringify(list))
var result =clonelist.filter(function(father){
var childlist = clonelist.filter(function(child){
return father.id= child.pid
})
if(childlist.length>0){
father.children=childlist
}
return father.pid ==0
})
return result
}
3、方法封装
function treeData(list,id,pid,children){
var clone = JSON.parse(JSON.stringify(list))
return clone.filter(function(father){
var childlist =clone.filter(function(child){
return father[id]==child[pid]
})
if(childlist.length>0){
father[children]=childlist
}
return father[pid]==0
})
}
<!DOCTYPE HTML><html>
<head>
<meta charset="UTF-8" />
<title>JS的TAB切换</title>
<style type="text/css">
</style>
<script type="text/javascript">
var oldArr = [
{
"date" : "20140929",
"value" : "value1"
},
{
"date" : "20140929",
"value" : "value2"
},
{
"date" : "20140929",
"value" : "value3"
},
{
"date" : "20140930",
"value" : "value4"
},
{
"date" : "20140930",
"value" : "value5"
}
]
var convert = function (oldArr)
{
var newJson = {}
for ( var i = 0 i < oldArr.length i++)
{
if (!newJson[oldArr[i].date])
{
newJson[oldArr[i].date] =
{
"date" : oldArr[i].date
}
}
if (!!newJson[oldArr[i].date]["data"])
{
newJson[oldArr[i].date]["data"].push (oldArr[i])
}
else
{
newJson[oldArr[i].date]["data"] = [oldArr[i]]
}
}
return newJson
}
var newJson = convert (oldArr)
console.log (newJson)
</script>
</head>
<body>
</body>
</html>
1、javascript里面的数组都是关联数组吧？js对象的本质就是关联数组。索引数组也就是常说的数组，数组是对象，所以数组的本质也是关联数组，但通常没人这么说。2、唯一区别就是：索引数组的索引只能是0和正整数，但它是有序的。关联数组的索引很宽松，但关联数组是无序的，就这个。3、json对象是严格版本的关联数组。4、至少在chrome下，索引数组和关联数组的速度是一样的。5、索引数组的好处就是格式简单，关联数组的好处是键可以任意定义。现代浏览器中提供了JSON.stringify()方法将数组，对象转成json。JSON.stringify把一个对象转换成json字符串，JSON.parse把一个json字符串解析成对象。不支持的可以引入json2.js$.fn.stringifyArray=function(array){returnJSON.stringify(array)}$.fn.parseArray=function(array){returnJSON.parse(array)}然后调用：$("").stringifyArray(array)
