按属性排序对象的JavaScript数组时，数字出了什么问题

Question

以下是按某些属性对对象数组进行排序的函数。

function createCompareFunc(propertyName){ 
    return function(obj1, obj2){  
    var val1=obj1[propertyName]; 
    var val2=obj1[propertyName]; 
    return val1-val2;  
    } 
} 

var data=[{name:'a', age:12},{name:'b',age:5}];  
console.log(typeof data[0]['age']); //number  
console.log(data.sort(createCompareFunc('name')));  
//[Object{name="a", age=12},Object{name="b",age=5}] 
console.log(data.sort(createCompareFunc('age')));  
//[Object{name="a", age=12},Object{name="b",age=5}], but I want to get '[Object{name="b",age=5},Object{name="a", age=12}]' 

数字有什么问题？

Answer 1

错字OBJ1而不是OBJ2在第6行

Answer 2

下面是代码和它的工作为了什么，你问：

function createCompareFunc(propertyName){ 
    return function(obj1, obj2){ 
    val1=obj1[propertyName]; 
    val2=obj2[propertyName];  
    return val1-val2;  
    } 
} 

var data=[{name:'a', age:12},{name:'b',age:5}];  
console.log(typeof data[0]['age']); 
console.log(data.sort(createCompareFunc('age'))); 
console.log(typeof data[0]['name']); 
console.log(data.sort(createCompareFunc('name'))); 

有一个逻辑上的错误，我想你没有带人注目它。您无法将字符串与javascript中的 - 运算符进行比较，因此请将属性类型作为参数传递以创建CompareFunc（propertyName，type），并根据它进行排序。例如：

createCompareFunc(propertyName,type) 
{ 
//function 
//sorting based on type of element 
} 
createCompareFunc('age',typeof data[0]['age']);