Data commit

Task/Anonymous-recursion/Python/anonymous-recursion-1.py

@@ -0,0 +1,4 @@
+>>> Y = lambda f: (lambda x: x(x))(lambda y: f(lambda *args: y(y)(*args)))
+>>> fib = lambda f: lambda n: None if n < 0 else (0 if n == 0 else (1 if n == 1 else f(n-1) + f(n-2)))
+>>> [ Y(fib)(i) for i in range(-2, 10) ]
+[None, None, 0, 1, 1, 2, 3, 5, 8, 13, 21, 34]

Task/Anonymous-recursion/Python/anonymous-recursion-2.py

@@ -0,0 +1,5 @@
+>>>from functools import partial
+>>> Y = lambda f: (lambda x: x(x))(lambda y: partial(f, lambda *args: y(y)(*args)))
+>>> fib = lambda f, n: None if n < 0 else (0 if n == 0 else (1 if n == 1 else f(n-1) + f(n-2)))
+>>> [ Y(fib)(i) for i in range(-2, 10) ]
+[None, None, 0, 1, 1, 2, 3, 5, 8, 13, 21, 34]

Task/Anonymous-recursion/Python/anonymous-recursion-3.py

@@ -0,0 +1,5 @@
+>>> from functools import partial
+>>> Y = lambda f: partial(f, f)
+>>> fib = lambda f, n: None if n < 0 else (0 if n == 0 else (1 if n == 1 else f(f, n-1) + f(f, n-2)))
+>>> [ Y(fib)(i) for i in range(-2, 10) ]
+[None, None, 0, 1, 1, 2, 3, 5, 8, 13, 21, 34]

Task/Anonymous-recursion/Python/anonymous-recursion-4.py

@@ -0,0 +1,9 @@
+>>> from inspect import currentframe
+>>> from types import FunctionType
+>>> def myself (*args, **kw):
+...    caller_frame = currentframe(1)
+...    code = caller_frame.f_code
+...    return FunctionType(code, caller_frame.f_globals)(*args, **kw)
+...
+>>> print "factorial(5) =",
+>>> print (lambda n:1 if n<=1 else n*myself(n-1)) ( 5 )

Task/Anonymous-recursion/Python/anonymous-recursion-5.py

@@ -0,0 +1,4 @@
+>>> Y = lambda f: lambda n: f(f,n)
+>>> fib = lambda f, n: None if n < 0 else (0 if n == 0 else (1 if n == 1 else f(f,n-1) + f(f,n-2))) #same as the first three implementations
+>>> [ Y(fib)(i) for i in range(-2, 10) ]
+[None, None, 0, 1, 1, 2, 3, 5, 8, 13, 21, 34]

Task/Anonymous-recursion/Python/anonymous-recursion-6.py

@@ -0,0 +1,3 @@
+>>> fib_func = (lambda f: lambda n: f(f,n))(lambda f, n: None if n < 0 else (0 if n == 0 else (1 if n == 1 else f(f,n-1) + f(f,n-2))))
+>>> [ fib_func(i) for i in range(-2, 10) ]
+[None, None, 0, 1, 1, 2, 3, 5, 8, 13, 21, 34]