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piroyoung/sample_reduce.py

Last active October 27, 2017 00:33
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sample_reduce.py
from typing import List, Callable, TypeVar
from functools import reduce, lru_cache
T = TypeVar('T')
class MyCollection(List[T]):
def reduce(self, f: Callable[[T, T], T]):
return reduce(f, self)
# example usage
obj = MyCollection(range(5))
obj.reduce(lambda x, y: x + y)
# example usage
obj = MyCollection('hello')
obj.reduce(lambda x, y: x + '-' + y)
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