Tuples - syntax
Pattern Matching
immutability/side effects
state identity lifetime
memoization
lazy sequences
recursive list processing
trampolining
reflection
Destructuring
Metadata
Java interop
Protocols
Datatypes
Records
Types
Macros
Refs
Agents
Atoms
Vars
Pre and Post conditions of functions

vector-of
case
flatten
frequencies
group-by
keep
keep-indexed
map-indexed
partition-all
partition-by
rand-nth
range
reductions
repeatedly
shuffle