This week's code snippet, Baklava in Mirth, is brought to you by Subete and the Sample Programs repo.
module sample-programs.baklava
import std.prelude
import std.world
import std.list
import std.str
||| stack: n
def abs [Int -- Nat] {
||| if n < 0 then -n else n
dup 0 < if(-1 *, dup drop) Int.>Nat-clamp
}
||| stack: n (count), s (string)
def repeat-string [Nat Str -- Str] {
"" ||| stack: n, s, result = ""
rotl ||| stack: s, result, n
repeat( ||| stack: s, result
||| repeat n times:
over ||| stack: s, result, s
cat ||| stack: s, result = result + s
)
dip(drop) ||| stack: result
}
||| stack: n
def baklava-line [Int -- Str] {
abs ||| stack: num-spaces = abs(n)
dup ||| stack: num-spaces, num-spaces
" " repeat-string ||| stack: num-spaces, spaces = num-spaces " "
swap ||| stack: spaces, num-spaces
Nat.>Int -2 * 21 + Int.>Nat-clamp ||| stack: spaces, num-stars = 21 - 2 * num-spaces
"*" repeat-string ||| stack: spaces, stars = num-stars "*"
cat ||| stack: spaces + stars
}
def main {
||| for n = -10 to 10:
||| print baklava-line(n)
-10 10 range for(baklava-line print)
}
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