Comments on: Day 17: Making Snowmen

By: Mandelbrot « Just Rakudo It

Mandelbrot « Just Rakudo It — Mon, 19 Apr 2010 00:29:19 +0000

[...] By colomon I’ve dragged the Mandelbrot script from day 17 of the Advent calendar kicking and screaming to the current version of Rakudo. The big hurdle turned out to be an [...]

By: colomon

colomon — Thu, 17 Dec 2009 19:12:51 +0000

Ah, yes, thanks! I must admit I still haven’t wrapped my head around what all you can do with Roles…

By: Dave Whipp

Dave Whipp — Thu, 17 Dec 2009 17:42:01 +0000

Instead of augmenting the class, presumably we could also have composed the result of subdivide with a Role that does the mandel:

Role Mandel { method mandel { … } };

sub subdivide($low, $high, $count) {
(^$count).map: {
($low + ($^value / ($count – 1)) * ($high – $low)) with Mandel
}
}

Or perhaps:

my @line = subdivide($re + ($upper-right.im)i, $re + 0i, ($width + 1) / 2).map({ $_ with Mandel })>>.mandel;

Still feels a but ugly

By: illviljan

illviljan — Thu, 17 Dec 2009 16:44:46 +0000

The idiom of using

(^$count)

made my day :-). Nice and compact way of generating numbers 0 up to $count (minus 1)!