Perfect numbers: Difference between revisions
m
→Python Functional
(→Functional (faster version): Updated primitives, tidied.) |
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Line 2,344:
# p :: Int -> Bool
def p(x):
'Factor of n
return 0 == (n % x)
Line 2,377:
'''Concatenated list over which a function has been mapped.
The list monad can be derived by using a function f which
wraps its output a in list,
(using an empty list to represent computational failure).'''
return lambda xs: list(
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