marking3/knight1_test4.scala
author Christian Urban <urbanc@in.tum.de>
Sun, 09 Dec 2018 01:36:49 +0000
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val f = (x:(Int, Int)) => if (x._1 > 3) Some(List(x)) else None
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assert(CW7b.first(List((1,0),(2,0),(3,0),(4,0)), f) == Some(List((4,0))))
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assert(CW7b.first(List((1,0),(2,0),(3,0)), f) == None)