Question

I want to save an array in an object in runtime through a loop.

For example, I take an input in an array inp=[2, 7, 20, 15, 19] and I want to save it in an obj={0:2, 1:7, 2:20, 3:15, 4:19}. But, at runtime such that I have a

    for(i=0;i<inp.length;i++) 
    { save each element of array into the respective object element } 

The problem is that I have to save arrays of different lengths, these array come from taking an input from user.

I am also sorting the object afterwards and returning the indices in another array in my code. I am stuck only at how to save an array in an object during runtime. I searched a lot for a clue to get started but, I could not find anything.

Answer 1

• Autoassign: (credit: am not i am)

  var obj = inp.slice();
  

• Manual Assignment:

  var obj = {};
  for(var i=0, n=inp.length; i<n; i++) 
     obj[i]=inp[i];
  

---

Though an Array is technically a subclass of an Object in JavaScript, the only thing that is really happening in going from an Array to an Object, is that you’re losing the native methods (indexOf,concat,reverse,etc) that are created during the array’s construction.