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saddle-points/test: Do not use head on empty list #1138

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merged 1 commit into from
Jan 30, 2023
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saddle-points/test: Do not use head on empty list #1138

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2 changes: 1 addition & 1 deletion exercises/practice/saddle-points/test/Tests.hs
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Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,7 @@ specs = describe "saddlePoints" $ for_ cases test
where
assertion = saddlePoints matrix `shouldBe` expected
rows = length xss
columns = length $ head xss
columns = if null xss then 0 else length $ head xss
matrix = listArray ((1, 1), (rows, columns)) (concat xss)

cases = [ ( "Example from README",
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