I challenge any moral (fast/loose) reasoner to give a #scala impl of [A](List[A] => Int) that is not a constant, nor a function of length.
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@dibblego I copied and pasted it from an Eclipse Scala worksheet where it compiled and ran. http://pastebin.com/M0t05vmX
@wbillingsley You used equals which violates parametricity and so is immoral.
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@dibblego pedantically only != on Ints. “Immortality” is in List.indexOf. And essentially in Scala spec (equals:Any=>Boolean defined on Any) -
@dibblego (blast my Mac’s autocorrect, that should read “immorality”. Though these things do seem to live on once they’re around…)
End of conversation
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