Question

I’m new enough to Javascript, and I have a small query about formulating variable names :

function createObjects(int length) {
  var count;
  for(count=0; count<length; count++;) {
    var personObj + "" + count;
  }  
}

here I want to formulate a different personObj for each iteration of the for loop, is this the correct procedure? will this give me :
var personObj1
var personObj2
etc

Thanks!
Matt

Answer 1

If you want to have several instances of the same underlying data structure / logic you could use an approach like this:

Create a constructor function that generates an Object with the properties (also methods) that you need. For example:

function PersonObj(name, age) {
    this.name = name;
    this.age = age;
}

This enables you to create a new instance of PersonObj by using var n = new PersonObj('Fred',32);. Now you can use an Array to store multiple instancesof these objects:

var persons = []; // creates a new Array

for (var i = 1; i < 13; i++){
    persons.push(new PersonObj('Alfred', i));
}

persons will now contain twelve Alfreds of age 1 to 12.

If you want to alter Alfred No. 3’s age you could do:

persons[2].age = 99;

See a live demo