Question

Say I already have many objects, like obj1, obj2, …..obj30…..

Now I am trying to write a function like this:

function blar(N){
 do something to objN
} 
blar('4');

So far it seems that the only way to do it is

function blar(thisObj){
 do something to thisObj
}
blar(obj4);

I wonder what is the right way to pass the N such that the function can use that N value to process objN.

Hope I make myself clear.

PS: I even try something like blar(obj+N) but apparently it’s wrong too, as the system tries to find obj, which doesn’t exist.

Answer 1

Use square bracket notation.

window['obj' + N];

This depends on them dangling off the window object and not being nicely scoped though.

… but if you have a bunch of objects, which are identified by being the same except for a number, then you should probably be storing them in an array in the first place. Then you would just:

myArray[N];