如何遍历对象属性并返回值？

Posted 2023-04-13

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]; 参考技术A 为什么我换了个对象就不行了呢 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(typeof(obj[i]) == "object" && obj[i] !== null) return getAttrVay(obj[i],attrName) else if (i == attrName) return obj[i]; var a = new Assessment(); alert(getAttrVay(a, "auto")) 参考技术B for(var i in obj) alert(i);

JS遍历类json对象属性值,方便统一赋值

JS遍历类、json对象属性、值，
我们在页面，经常会接收后面或json返回的数据，要一个一个赋值，遍历json属性，可以方便给界面的控件赋值。

代码：
遍历js类

    <script type="text/javascript">
        //定义一个普通的js类，包含方法
        var p= function ()
        this.Id= 1;
        this.Name= 'test1';
        
        var pp= new p(); 
        for(var item in pp)
        if(typeof(pp[item])== "function")
        continue;
        console.log("p对象中"+item+"的属性="+pp[item]);
        
    </script>

遍历Json对象

//遍历Json对象属性、值
    <script type="text/javascript">
        //定义一个jsonArray对象
        var json = [ a: '121', b: 222, bb: 'vvv' ,  a: '122', b: 223, bb: 'ccc' ];
        for (var i=0;i<json.length;i++) 
            console.log(json[i]);
            var jsonItem = json[i];
            for (var item in jsonItem) 
                //遍历pp对象中的属性，只显示出 非函数的 属性，注意不能 遍历 p这个类
                if (typeof (jsonItem[item]) == "function")
                    continue;
                console.log("p对象中" + item + "的属性=" + jsonItem[item]);
            
        
    </script>