feat: add Series|Expr.cum_prod method, add reverse kw in cum_sum method
#1386
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FBruzzesi
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Nov 16, 2024
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| return ( | ||
| not_na_series.cum_sum() | ||
| if not reverse | ||
| else len(self) - not_na_series.cum_sum() + not_na_series - 1 | ||
| ) |
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Ok maybe this could be faster as it does not reverse the array twice
FBruzzesi
commented
Nov 16, 2024
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| Returns: | ||
| A new expression. | ||
|
|
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Guess who forgot about these returns
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This is 3 folded (I could not resist)
cum_prodreverseincum_sumreverse=False, raise otherwise