Loading collection data...
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.
I finally got it down. You need to be very careful with the methods on the EmptyList type
Does anybody know what the exact test is for
"Removing 'a' from '(a)' -> l1.remove(first) is empty"
This is one of 2 tests that are failing me and I don't know what it expects me to return.
I tried returning this.next (which is an EmptyList() in that case)...
Also
" Removing 'b' from '(c a b a)' -> l4.remove l4.head() is l4.tail()"
is failing me and I don't know why... it actually tries to remove a "b" from "(c a a)" ...