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Contravariance exercises #4

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ghost opened this issue Jun 7, 2016 · 0 comments

ghost commented Jun 7, 2016

From scala-exercises/scala-exercises#353

We have removed the contravariance related exercises because they were originally expressed with mutability. The exercises need to be reworked to demonstrate how contravariance works in a more principled way than using mutability.

raulraja added the hackathon label

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