This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.
# Array.all? (from ruby core) --- array.all? -> true or false array.all? {|element| ... } -> true or false array.all?(obj) -> true or false --- Returns `true` if all elements of `self` meet a given criterion. With no block given and no argument, returns `true` if `self` contains only truthy elements, `false` otherwise: [0, 1, :foo].all? # => true [0, nil, 2].all? # => false [].all? # => true With a block given and no argument, calls the block with each element in `self`; returns `true` if the block returns only truthy values, `false` otherwise: [0, 1, 2].all? { |element| element < 3 } # => true [0, 1, 2].all? { |element| element < 2 } # => false If argument `obj` is given, returns `true` if `obj.===` every element, `false` otherwise: ['food', 'fool', 'foot'].all?(/foo/) # => true ['food', 'drink'].all?(/bar/) # => false [].all?(/foo/) # => true [0, 0, 0].all?(0) # => true [0, 1, 2].all?(1) # => false Related: Enumerable#all?
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.