I am programming in JavaScript and I created an array called users and a constructor for the user object. Everytime a new object is created I want to add it to the array.
var users = [];
function user(username, password){
this.username = username;
this.password = password;
users[users.length-1] = this;
};
var joe = new user('Joe', "joe100");
The way above doesn't seem to work. How can I add an object to an array in the constructor?
"users" is an empty array which means its length is 0 when you hit the constructor. So assigning "this" to length-1 would mean assigning "this" to the "-1" index...thats why it is not working....get rid of the -1, or...
Use the javascript array.push() function instead to add to your array perhaps
Check out the example on W3Schools site... Array#push
Just remove -1 from your code and it will look like bellow one
var users = [];
function user(username, password){
this.username = username;
this.password = password;
users[users.length] = this;
};
var joe = new user('Joe', "joe100");
An HTML Demo code example for you
<!DOCTYPE html>
<html>
<body>
<p id="demo"></p>
<script>
var users = [];
function user(username, password){
this.username = username;
this.password = password;
users[users.length] = this;
};
var joe = new user('Joe', "joe100"),l = new user('ll', "ll99");
document.getElementById("demo").innerHTML = users[0].username+" --- "+users[0].password+"<br/>"+users[1].username+" --- "+users[1].password;
</script>
</body>
</html>
I think this will help you.
-1