How can I choose an object key at random?

Question

I have the following code;

namedarray[\'India\']=\'New Delhi\';
namedarray[\'Australia\']=\'Canberra\';
namedarray[\'Indonasia\']=\'Jakarta\';
namedarray[\'I         


        

Answer 1

If you are capable of using libraries, you may find that Lo-Dash JS library has lots of very useful methods for such cases. In this case, go ahead and check sample().

(Note Lo-Dash convention is naming the library object _. Don't forget to check installation in the same page to set it up for your project.)

_.sample([1, 2, 3, 4]);
// → 2

In you case, go ahead and use:

_.sample(namedarray)

and in context:

document.getElementById('question').innerHTML="Q." +_.sample(namedarray)+"  is capital for which country";

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On a side note, you could use a simpler notation for populating the array.

namedarray = {
    India : 'New Delhi',
    Australia : 'Canberra',
    Indonasia : 'Jakarta',
    Iran : 'Tehrani',
    Iraq : 'Bhagdad',
    Nijeria : 'Abuja'
}