September Morn Update

Task/Sierpinski-triangle/Python/sierpinski-triangle-3.py

@@ -1,4 +1,22 @@
-x = 1
-while True:
-	print(bin(x)[2:].replace('0', ' '))
-	x ^= x<<1
+from functools import (reduce)
+from operator import (add)
+
+
+# sierpinski :: Int -> String
+def sierpinski(n):
+    def go(xs, i):
+        s = ' ' * (2 ** i)
+        return concatMap(lambda x: [s + x + s])(xs) + (
+            concatMap(lambda x: [x + ' ' + x])(xs)
+        )
+    return '\n'.join(reduce(go, range(n), '*'))
+
+
+# concatMap :: (a -> [b]) -> [a] -> [b]
+def concatMap(f):
+    return lambda xs: (
+        reduce(add, map(f, xs), [])
+    )
+
+
+print(sierpinski(4))

Task/Sierpinski-triangle/Python/sierpinski-triangle-4.py

@@ -0,0 +1,4 @@
+x = 1
+while True:
+	print(bin(x)[2:].replace('0', ' '))
+	x ^= x<<1