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Answers and rating deltas for

How do I reduce a spark dataframe to a maximum amount of rows for each value in a column?

Author Votes Δ
lvnt 2 +4.08
LaSul 0 -0.95
ggeop 0 -1.18
Foxan Ng 0 -0.24
Last visited: May 14, 2020, 3:16:00 AM