Composition of Functions creative solution for Max Digit by flpo - python coding challenges

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Composition of Functions solution in Creative category for Max Digit by flpo

from functools import reduce
compose = lambda *funcs: lambda x: reduce(lambda y, f: f(y), reversed(funcs), x)
max_digit = compose(int, max, str)

March 5, 2020

Comments:

viktor.chyrkin on Aug. 15, 2021, 2:22 p.m.
you were probably tired.

mmmazzan on Oct. 5, 2021, 7:41 p.m.
Can you explain this: <pre class='brush: python'>compose = lambda *funcs: lambda x: reduce(lambda y, f: f(y), reversed(funcs), x) </pre> Thanks

lezeroq on Jan. 17, 2023, 2:06 a.m.
This is functions composition. You can rewrite it as: <pre class='brush: python'>def compose(*funcs): """ Return a function that is composition of all functions in funcs. For instance: new_function = compose(int, max, str) if the same as def new_function(x): return int(max(str(x))) """ def _inner(x): # return reduce(lambda y, f: f(y), reversed(funcs), x) result = x for f in reversed(funcs): result = f(result) return result return _inner </pre> And so the entire solution could look like: <pre class='brush: python'>max_digit = lambda s: int(max(str(s))) </pre>

Strings and Integers

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