Last night I dreamt I found a class with equals—but not hashCode—overridden. Now I'm paranoid that code is real and in production somewhere.
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Scalastyle have a rule for this!
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It would be better if java.lang.Object (or Any for that matter) defines hashCode = 1
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you might have missed some occurrences of `override val hashCode = 0`
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Yep! There were 7 (all in Scalac and associated libraries, incidentally).
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I wish I had not looked at that right before I go to bed.
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