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
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
Don't. Dynamically generating variables is never a good idea. Use an object or an array instead. They are designed to structure groups of related data.
function createObjects(length) {
var count, people = [];
for(count=0; count<length; count++;) {
people.push('something');
}
return people;
}
Why not use an array for this instead?
if needs must, you can alwvays add a named property to the window object:
function createObjects(int length) {
var count;
for(count=0; count<length; count++;) {
window[personObj + "" + count] = new SomeObject();
}
}
Create the objects, add properties to objects and store the objects in an array.
var al = new Array();
function createObjects(int length) {
var o = new Object();
for(var count=0; count<length; count++;) {
o.count = 'some value';
}
al.push(o);
}
