Finally after hours of googling, I can write my program. That what's I call research. The research takes 3 hours, writing the program takes 2 minutes… - Joe Armstrong

Object Oriented Programming, this is the art of hiding side effects. If you can do it successfully you can write this in program. If you do it unsuccessfully, you get in a sucking mess.

Instead of handy compose, we'll keep compose exactly the same and will write a little function which takes a function that does not have debugging and return the function that does debugging. And we have a function that accept only one argument, the un-debugging version, we'll add another little function that automatically add an argument to it. When we done that, we can bind call compose on it and everything will work and will be nice. And will be peace on the earth and everybody will have a good time.

I thought if you multiply two integers together, you get an integer. But apparently you don't in PHP. You get a floating point number, which gets bigger and bigger and that's okay. Until you get to factorial(171), and then you get "INF". I don't know what "INF" is. I think it's infinity actually. But in that case, it's probably wrong, because infinity is awfully big. Bigger than factorial(171).