Conway's game of life

[bearophile via Digitalmars-d-learn]

Paul:

> Regarding the immutable loop variable, I've conditioned myself 
> never to interfere with loop control values

But adding "immutable" you don't risk modifying the variable by 
mistake.

It's another design mistake of D. Variables (like foreach loop 
indexes) must be immutable by default because otherwise 
programmers often don't bother making them immutable. It's a lost 
war.

Bye,
bearophile