Looking for a code example using Python’s PyDash module of reduce with the accumulator arg, and how to output that with previous and current.
1 Answers
pydash.reduce_ is not very different from the built-in functools.reduce.
A good example for using the accumulator (or the initial parameter in functools' case) is to use it as a "neutral element":
def factorial(n):
return pydash.reduce_(range(1, n), lambda total, x: total*x, accumulator=1)
In this case, 1 is used as the initial value and doesn't affect the result (since 1*x=x), but more importantly: It will be used as the return value if there are no elements in range(1, n).
And indeed, factorial(0) == factorial(1) == 1 is the required result.
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