javascript - 按属性对 JavaScript 对象数组进行排序时数字有什么问题

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}]'

数字有什么问题吗？

Answer 1

第 6 行输入错误 obj1 而不是 obj2。