On 2011-02-23 13:57, Andrei Alexandrescu wrote:
On 2/23/11 5:10 AM, Jacob Carlborg wrote:
On 2011-02-23 03:28, bearophile wrote:
This is a Scala implementation of a function that prints the carpet:
def nextCarpet(carpet: List[String]): List[String] = (
carpet.map(x => x + x + x) :::
carpet.map(x => x + x.replace('#', ' ') + x) :::
carpet.map(x => x + x + x))
def sierpinskiCarpets(n: Int) =
(Iterator.iterate(List("#"))(nextCarpet) drop n next) foreach println
Again Scala shines with its beautiful lambdas compared to Ds ugly string
version.
But then
Iterator.iterate(List("#"))(nextCarpet) drop n next) foreach println
a sort of a stuttering Yoda evokes.
Andrei
Ok, I see now that my answer can be misinterpreted. When I wrote the
answer I was actually referring to the lambda syntax used in the "map"
function.
x => x + x + x
--
/Jacob Carlborg
