我正在尝试按年龄对员工对象数组进行排序,我得到以下输出:
[object Object],[object Object],[object Object],[object Object]
但是,当我用一组数字替换employees数组时,代码工作正常,如: var points = [2,10,7,8]
有人可以告诉我我哪里出错了吗?谢谢。
以下是我的代码:
<script type="text/javascript">
function sortFunc(){
var employees=[]
employees[0]={name:"George", age:32, retiredate:"March 12, 2014"}
employees[1]={name:"Edward", age:17, retiredate:"June 2, 2023"}
employees[2]={name:"Christine", age:58, retiredate:"December 20, 2036"}
employees[3]={name:"Sarah", age:62, retiredate:"April 30, 2020"}
employees.sort(function(a, b){
return a.age-b.age
// return a-b;
})
document.getElementById("disp").innerHTML=employees;
}
</script>
</head>
<body>
<div id="disp">Click the button below to sort.</div>
<button onclick="sortFunc()">Sort Now</button>
</body>
答案 0 :(得分:1)
你的问题不在于排序,这是因为员工是一个对象数组,所以,无论是否排序,如果你把它变成一个字符串表示,以便将它添加到你将要获得的文档
[object Object],[object Object],[object Object],[object Object]
要显示您的数据,您需要在将其转换为文本方面更加结构化。例如:
var html = "";
for(var i = 0; i < employees.length; i++) {
var employee = employees[i];
html = html + employee.name + " " + employee.age + "<br/>";
}
document.getElementById("disp").innerHTML=employees;
或者您可以使用众多javascript模板库中的一个来轻松将复杂的javascript结构转换为text / html。
答案 1 :(得分:1)
排序工作正常。 你输出它的方式是不正确的。
尝试使用循环而不是innerHTML将其添加到页面中。
var out="";
for(var i=0;i<employees.length;i++){
out+="<p>"+employees[i]['age']+", "+employees[i]['name']+"</p>\n";
}
document.getElementById("disp").innerHTML=out;
您也可以像这样定义对象:
var employees=[
{name:"George", age:32, retiredate:"March 12, 2014"},
{name:"Edward", age:17, retiredate:"June 2, 2023"},
{name:"Christine", age:58, retiredate:"December 20, 2036"},
{name:"Sarah", age:62, retiredate:"April 30, 2020"}
]
干杯
-G。
答案 2 :(得分:0)
你的方法是正确的。
然而,您的JavaScript缺少所有分号。另外,您应该使用push()
而不是直接分配。
var employees = [];
employees.push( {name:"George", age:32, retiredate:"March 12, 2014"} );
employees.push( {name:"Edward", age:17, retiredate:"June 2, 2023"} );
employees.push( {name:"Christine", age:58, retiredate:"December 20, 2036"} );
employees.push( {name:"Sarah", age:62, retiredate:"April 30, 2020"} );
employees.sort(function(a, b){
return a.age - b.age;
});
要输出可读的内容,首先将数据结构转换为字符串:
document.getElementById("disp").innerHTML = JSON.stringify(employees);
答案 3 :(得分:0)
您的排序功能确实有效。要查看输出,请尝试以下操作:
document.getElementById("disp").innerHTML='';
for(i=0; i<employees.length; i++) {
document.getElementById("disp").innerHTML+=employees[i].age+'<br>';
}
而不是
document.getElementById("disp").innerHTML=employees;
答案 4 :(得分:0)
问题是document.getElementById("disp").innerHTML=employees;
- 您将employees数组填入HTML中,而无需手动将其转换为有效的HTML,因此您可以获得JavaScript的默认文本表示形式,恰好是[object Object],[object Object],[object Object],[object Object]
。
请改为尝试:
function prepForHTML(emp) {
var html='';
for (var i=0;i<emp.length;i++) {
for (var j in emp[i]) html+=j+"="+emp[i][j]+", ";
}
html+="<br>";
return html;
}
和
document.getElementById("disp").innerHTML=prepForHTML(employees);
答案 5 :(得分:0)
您需要覆盖toString()
方法,默认情况下会显示[object Object]
。
的 Example: 强> 的
function Employee(name, age, retiredate) {
this.name = name;
this.age = age;
this.retiredate = retiredate;
}
Employee.prototype.toString = function() {
return "Name:"+this.name+" Age:"+this.age+" Retiredate:"+this.retiredate;
};
var employees=[];
employees.push(new Employee("George", 32, "March 12, 2014"));
employees.push(new Employee("Edward", 17, "June 2, 2023"));
employees.push(new Employee("Christine", 58, "December 20, 2036"));
employees.push(new Employee("Sarah", 62, "April 30, 2020"));
employees.sort(function(a, b){
return a.age-b.age;
});
document.getElementById("disp").innerHTML=employees;