This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.
# Array.intersection (from ruby core) --- array.intersection(*other_arrays) -> new_array --- Returns a new Array containing each element found both in `self` and in all of the given Arrays `other_arrays`; duplicates are omitted; items are compared using `eql?`: [0, 1, 2, 3].intersection([0, 1, 2], [0, 1, 3]) # => [0, 1] [0, 0, 1, 1, 2, 3].intersection([0, 1, 2], [0, 1, 3]) # => [0, 1] Preserves order from `self`: [0, 1, 2].intersection([2, 1, 0]) # => [0, 1, 2] 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.