This is a very interesting way to use the concept of an object in JavaScript!

So cool bro

No, it actually calls all 4 operations, due to the fact that the object initialization has to resolve it's properties during runtime

so by calling cases[operation], you're just returning 1 of 4 already calculated operations

impressive

Very clever

yeah

Impressive)))))))))

i saw some folks saying this runs all 4 operations but that isnt true right? the key [operation] is defining the condition for the code block within cases resulting in only the code matching the condition being executed? Essentially replacing switch(operation) if i understand it correctly.

Interesting way.

I was doing 'case' and it was appearing an error curious why this was happening but when puttting 'cases' it appeared correct?

Yeah; in fact, this particular approach relies on that.

it will change the input array :)

Clever, great!

Object Literal?

Edit: Oh wait, it is actually operating the other 3 as well, even if they are not selected? XD JS is weird.