Question

美好的一天，我的问题可能有点'新手'，但我是！我有一个像这样的对象：

var person = {
   firstName: null, 
   lastName: null, 
   age: null, 
   eyeColor: null
};

所以，当我点击一个按钮来“添加”一个新人（一个新对象）时，我希望有这样的东西......

$("p").click(function(){
    var newPerson = new Person("John", "Doe", "50", "blue");
    console.log("A new person has been created!");
});

但是这个场景对一个对象有好处......如何创建具有不同参数的“多个”新人，特别是不同的对象名称（var newPerson）？我知道我可以有一个带参数的函数，但是对象的名称保持不变，所以对象被新的替换... 我希望我很清楚......或者至少有人会理解我！谢谢！：）

Answer 1

当您使用具有相同标签的var关键字时，它会切换您所引用的对象，因此问题是找到存储People类实例的位置而不是创建不同的变量名。这样的事情可以奏效：

var people = [];

$("p").click(function(){
    var newPerson = new Person("John", "Doe", "50", "blue");
    people.push(newPerson);
    console.log("A new person has been created!");
});

通过这种方式，您可以使用其people数组中存储的索引来引用不同的人。

console.log(people[0]) //-> {firstName: "John", lastName: "Doe", age: 50, eyeColor: "blue"}

希望这有帮助！

Answer 2

我想这可以帮助您解决问题：

HTML PART：

<form method="POST" id="form">
<input id="name" placeholder="First name"></input><br>
<input id="lname" placeholder="Last name"></input><br>
<input id="age" placeholder="Age"></input><br>
<input id="eye" placeholder="Eye Color"></input><br>
<button type="submit" id="btn">CREATE</button>
</form>

JS PART：

function person(f_name, l_name, age, eye_c) {
  this.fname = f_name;
  this.lname = l_name;
  this.age = age;
  this.eyec = eye_c; 
}  // Defining the object, consider it like a object template.
person.prototype.notif = function () {
    alert("The user with name " + this.fname + " logged in!");
    }  // Here is a function added outside the object, does not need to be done this way...It pops an alert box.

var id = 0; // ...so we can track the id/number of submits.
var list = []; // Here we will put all the entries, objects.
document.getElementById("form").onsubmit = function(event) {
  event.preventDefault();
  var name_value = document.getElementById("name").value; // Taking the value from the input field.
  var lname_value = document.getElementById("lname").value; // Taking the value from the input field.
  var age_value = document.getElementById("age").value; // Taking the value from the input field.
  var eye_value = document.getElementById("eye").value; // Taking the value from the input field.
  list[id] = new person(name_value, lname_value, age_value, eye_value); // Making the new object of name list with an ID ( list0, list1... )
  list[id].notif();  // Giving the notification...
  id++;  // Increasing the ID afther every submit, so we can track the list.
  console.log(list);
};  // Creating the new object (could be new acc for example), with the entered parameters.

单击创建一个新对象

2 个答案: