Re: Fibonacci Generator

[ariels]

All you need in order to generate the next Fibonacci number is the last two; why are you storing all of them? (Also, why not use strict?)

Here's one way; I presented something similar in Fibonacci numbers with lvalues. I give this one as I think it presents an interesting reminder of how "parallel assignment" is useful.

The modification to use Math::BigInt would be easy but obfuscatory for this example.

my ($a,$b)=(1,2);       # Start sequence at 1,2 like in code
print "$a\n$b\n";
for(1..$n-2) {
  ($a,$b) = ($b,$a+$b);
  print "$b\n"
}

Save memory, easier to read, etc.

[sifukurt]

The reason I was storing all of the number was that originally I thought that I might want to do things with them. Then I decided to scrap that idea and just go with a plain ol' generator. It was a remnant from a previous incarnation. With regard to strict, I always use it if I'm either writing a production script or a script that is going to be more than a few lines long. With something that is really short and isn't ever going to be in serious production use, I only use it about half the time.

I'm posting the modified code as I type this.
___________________
Kurt

[ozone]

mrmick might disagree - have you seen his argument against one-off scripts
Quite good reading... ;-)