Test asserts - Message, bool, etc.
Tuples - syntax
Pattern Matching
Functions returning functions
Functions taking functions
if expressions
for comprehensions
immutability/side effects
state identity lifetime
collections array, list
map, reduce, filter
classes
lists / cons
memoization
lazy sequences
recursion
traits / mixins
recrusive list processing
lambda
currying / pfa
null option types
mutation
type signatures
reflection
scala properties - set date / use earlier date