How to create JS class object in a loop

Question

I am have a class in JS job ,now I want a simple way to create its object in a for loop, the way I trying to do this is:

 for(var i=1;i<=jobsCount;i++)
         {
          var eval("job"+i)=new job();

         }

But this syntax gives me an error as illegal life hand side assignment ,is there a simple way do this,?

Denys Séguret · Accepted Answer · 2012-12-14 09:09:35Z

4

If you want to dynamically create variables in the global context, you may do this :

window['job'+i]=new job();

But I'd suggest the use of an array to avoid cluttering the global context :

var jobs = [];
for(var i=1; i<jobsCount; i++){ // why starting at 1 ? shouldn't it be <= ?
      jobs[i] = new job();
}

answered Dec 14, 2012 at 9:09

Denys Séguret

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4 Comments

Snedden27 Over a year ago

Over here aren't we creating a array of objects?, I don't want an array I want individual object names like job1,job2,job3,job4 and so on....

elclanrs Over a year ago

What's the problem with the array? It's even better because you only need one variable. What you want to do is not a good idea but the window solution should work.

Snedden27 Over a year ago

I have already written the code using this objects at first the number of object to be created were limited,so I manually created them like var job1=new job() and so on but now I require them to be dynamic ,if I create array I would have to modify and correct to much code

Denys Séguret Over a year ago

@Snedden27 The first solution ( window['job'+i]=new job();) builds individual variables job1, job2, etc.

Mikhail Payson · Accepted Answer · 2012-12-14 09:09:57Z

0

var jobs = [];
for(var i=1;i<jobsCount;i++)
{
    jobs[i]=new job();

}

answered Dec 14, 2012 at 9:09

Mikhail Payson

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