Agree. Add the blank space and replace with the position could be in a single function

Your decision is very cool!

"Better" as in better for code golf, but not necessarily for production code.

i have one line for first time ^^. Im so proud :D

Beautiful.

How is this clever at all? I must be a genius, then.

The is what psychopathy looks like.

My solution was to actually compute the lookup table and cache it.
I was about to ask on a forumn if what I did was cheating, until I saw this.

Your code has actually 4 lines. Not that it matters, though.

same, i used recursion. 3 lines. I like mine better than top as well

How can two persons think of the exact same solution.

function isDefined(value) {
  return !isUndefined(value)
}

That is just beautiful. It inspired me to write this program:

function isNumberOne(number) {
  return isAnInteger(number)
    && isSmallerThanNumberTwo(number)
    && isBiggerThanNumberZero(number);
}

dat cool

Saying "this is how you'd want to write" is like apologizing for bad/long code. This is a coding competition, afterall.
Check out my solution and see how it's done.