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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
scala.collection.immutable.StringOps, conversions inscala.Predef.Was not aware filter can be applied on String in Scala because getClass() only returns java.lang.String. There is filter() method in java.lang.String class. What is the class to look for the documentaion scala string (if there is something like that)?
val s = "hello"
println(s.getClass())