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hyphenrf/pyfun.py

Created April 20, 2021 11:52
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pyfun.py
import functools
c = lambda f: lambda g: lambda x: f (g (x))
add = lambda x: lambda y: x + y
const = lambda x: lambda y: x
uncurry = lambda f: lambda x, y: f (x) (y)
succ = add (1)
fold = lambda f: lambda z: lambda xs: functools.reduce(uncurry(f), xs, z)
len = fold (c (const) (succ)) (0)
print (len (range (100))) # stdout: 100
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