如何遍历对象属性并返回值？
如有对象
a = {
name:"text",
childrenElm:{
parentID:0,
myName:"john",
aihao:{
web:"html",
code:"js"
}
}
}
我想通过一个方法 getAttrVal(attrName) 直接取得该属性的值
下面是刚才编写的，但是不能达到预期的效果,这写法会输出N次。
alert(getAttrVal("code"))
function getAttrVay(attrName)
{
var obj = a;
for(var i in obj){
if(typeof(obj[i]) == "object" && obj[i] !== null){
getAttrVay(obj[i],attrName)
}else{
if (i == attrName){
return obj[i];
break;
}
}
}
}
a = {
name:"text",
childrenElm:{
parentID:0,
myName:"john",
aihao:{
web:"html",
code:"js"
}
}
}
alert(getAttrVay(a, "code"))
function getAttrVay(obj, attrName)
{
for(var i in obj){
if(typeof(obj[i]) == "object" && obj[i] !== null){
return getAttrVay(obj[i],attrName)
}else{
if (i == attrName){
return obj[i];
}
}
}
}
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title> new document </title>
<style type="text/css">
#aa {
}
</style>
</head>
<body>
<script type="text/javascript">
function Assessment(){
this.sex = null;
this.married = null;
this.age = 20;
this.address = {
provinces:0,
city:0
};
this.houseState = null;
this.houseCosts = null;
this.familyStructure = {
toddlers:0,
elementary:0,
teenager:0,
movedOut:0,
movedBackIn:0
};
this.familyCost = null;
this.payForEducation = null;
this.loans = {
factors:{
auto:0,
personal:0,
education:0,
otherA:0
},
attachedFactors:{
charities:0,
special:0,
elders:0,
otherB:0
},
lowerFactionrs:{
cash:0,
savings:0,
insurance:0,
otherC:0
}
}
}
function getAttrVay(obj, attrName)
{
for(var i in obj){
if(obj[i] instanceof Object){
var s = getAttrVay(obj[i],attrName);
if(s!==undefined) return s;
}else{
if (i == attrName){
return obj[i];
}
}
}
}
var a = new Assessment();
alert(getAttrVay(a, "auto"))