Tuples - syntax
Pattern Matching
immutability/side effects
state identity lifetime
memoization
lazy sequences
recursion
recursive list processing
trampolining
currying / pfa
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