do:			each
select:			select
reject:			reject
collect:		collect
inject:into:		inject
anySatisfy: aBlock	any?
contains: aBlock	
includes: anObject	include
detect: aBlock		detect
==			equal? (identity)
=			== (value. Numerics specialize to coerce.)
			eql? (value. Numerics don't coerce.)
			=== (value. specialized for case equality)