js---json對象拆分

var a={
"bb":"world",
    "a0":1,
    "a1":2,
    "b0":4,
    "b1":5,
    "aa":"hello"
}

var keyList=Object.keys(a)

var projectList={"self":{}}
var rex=/[0-9]$/g
for(i=0;i<keyList.length;i++){
    latNum=keyList[i].match(rex)

     if(!rex.test(keyList[i])){
        projectList["self"][keyList[i]]=a[keyList[i]]
    }
    if(latNum!==null){
    if(!projectList['list'+latNum[0]]){
        console.log(projectList[latNum[0]])
        projectList["list"+latNum[0]]={}//創建空對象
    }

    projectList["list"+latNum[0]][keyList[i]]=a[keyList[i]]
    }
}
console.log(projectList)