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
A File object is a representation of a file in the underlying platform.| ruby-doc.org
Public Class Methods| ruby-doc.org
Raised when the arguments are wrong and there isn’t a more specific Exception class.| ruby-doc.org
A String object has an arbitrary sequence of bytes, typically representing text or binary data. A String object may be created using String::new or as literals.| ruby-doc.org
Public Instance Methods| ruby-doc.org
A Hash maps each of its unique keys to a specific value.| ruby-doc.org
Public Instance Methods| 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