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kunigami/typed_reduce.py

Last active December 26, 2019 17:18
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typed_reduce.py
def typed_reduce(xs: List[str], f: Callable[[str, str], str], x0: str) -> str:
r = x0
for x in xs:
r = f(r, x)
return r
print(typed_reduce(['a', 'b', 'c'], lambda x, y: x + y, ''))
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