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Answers and rating deltas for

Why doesn't this windowed expression result in a divide by zero error?

Author Votes Δ
Damien_The_Unbeliever 6 +1.60
Martin Smith 5 +0.17
Gordon Linoff 1 -1.21
Suraj Kumar 1 -0.11
Last visited: Jun 17, 2019, 2:59:36 PM