什么';按属性对对象的JavaScript数组排序时,数字有误
下面是按某些属性对对象数组进行排序的函数什么';按属性对对象的JavaScript数组排序时,数字有误,javascript,string,numbers,sorting,Javascript,String,Numbers,Sorting,下面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}];
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?在第6行中键入obj1而不是obj2。以下是代码及其“适用于您要求的内容:
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')));
有一个逻辑错误,我想你没有注意到。在javascript中不能将字符串与-operator进行比较,因此将属性类型作为参数传递给createCompareFunc(propertyName,type),并基于该参数对其进行排序。例如:
createCompareFunc(propertyName,type)
{
//function
//sorting based on type of element
}
createCompareFunc('age',typeof data[0]['age']);
在比较函数中,是键入错误还是代码中的错误?您必须检查: