The Scala code in this exercise does not compile:   https://www.cloudera.com/developers/get-started-with-hadoop-tutorial/exercise-3.html   I get the error:   <console>:30: error: not found: value sc           return sc.newAPIHadoopRDD(job.getConfiguration,   Where is the variable 'sc' initialized? There are many errors in these tutorials which is a bit frustrating, I hope someone can tell me how to overcome it, thanks.   I am running the latest CDH Quickstart docker image. ... View more