If you do something and it fails you can do it again, it will work the second time. That's because quite often you are using something underneath whe… - Joe Armstrong

You don't want your fault creep into the system and damage other parts of the system. you need to build firewall between things to stop them from propagating.

The number of states of three variables in javascript could have is greater of the total number of the atoms of the planet.

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).