An instance of class IO (commonly called a stream) represents an input/output stream in the underlying operating system. Class IO is the basis for input and output in Ruby.| ruby-doc.org
Public Instance Methods| ruby-doc.org
Public Instance Methods| ruby-doc.org
A Range object represents a collection of values that are between given begin and end values.| ruby-doc.org
An Array is an ordered, integer-indexed collection of objects, called elements. Any object (even another array) may be an array element, and an array can contain objects of different types.| ruby-doc.org
A Hash maps each of its unique keys to a specific value.| ruby-doc.org
What’s Here¶ ↑| ruby-doc.org
A solid grasp of the tools Ruby provides for inheritance, like include and extend, helps write better code. But the concepts are often learned hastily—this post revisits them in depth.| blog.jez.io