This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.
# Hash.key (from ruby core) --- hash.key(value) -> key or nil --- Returns the key for the first-found entry with the given `value` (see [Entry Order](#class-Hash-label-Entry+Order)): h = {foo: 0, bar: 2, baz: 2} h.key(0) # => :foo h.key(2) # => :bar Returns `nil` if so such value is found.
This is MURDOC! A Ruby documentation browser inspired by Smalltalk-80. It allows you to learn about Ruby by browsing through its class hierarchies, and see any of its methods.