class Range: A \Range object represents a collection of values that are between given begin and end values. literals.| docs.ruby-lang.org
class MatchData: MatchData encapsulates the result of matching a Regexp against string. It is returned by Regexp#match and String#match, and also stored in a global va| docs.ruby-lang.org
class IndexError: Raised when the given index is invalid. bar] a.| docs.ruby-lang.org
class Encoding: An \Encoding instance represents a character encoding usable in Ruby. It is defined as a constant under the \Encoding namespace.| docs.ruby-lang.org
literals: Literals Literals create objects you can use in your program. Backtick Literals}[#label-25x-3A+Backtick+Literals] == Boolean and Nil Literals +nil+| docs.ruby-lang.org
module Comparable: The Comparable mixin is used by classes whose objects may be ordered. code> operator, which compares the receiver against another object, returning a| docs.ruby-lang.org
class Symbol: A +Symbol+ object represents a named identifier inside the Ruby interpreter. literals.| docs.ruby-lang.org
class String: A +String+ object has an arbitrary sequence of bytes, typically representing text or binary data. new or as literals.| docs.ruby-lang.org
class Regexp: en. wikipedia.| docs.ruby-lang.org
class Object: Object is the default root of all Ruby objects. Object inherits from BasicObject which allows creating alternate object hierarchies.| docs.ruby-lang.org
class Hash: A +Hash+ maps each of its unique keys to a specific value. An Array index is always an Integer.| docs.ruby-lang.org
module Kernel: The Kernel module is included by class Object, so its methods are available in every Ruby object. The Kernel instance methods are documented in class| docs.ruby-lang.org