This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.
# Array.union (from ruby core) --- array.union(*other_arrays) -> new_array --- Returns a new Array that is the union of `self` and all given Arrays `other_arrays`; duplicates are removed; order is preserved; items are compared using `eql?`: [0, 1, 2, 3].union([4, 5], [6, 7]) # => [0, 1, 2, 3, 4, 5, 6, 7] [0, 1, 1].union([2, 1], [3, 1]) # => [0, 1, 2, 3] [0, 1, 2, 3].union([3, 2], [1, 0]) # => [0, 1, 2, 3] Returns a copy of `self` if no arguments given. Related: Array#|.
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.