A File object is a representation of a file in the underlying platform.| ruby-doc.org
Public Class 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 Time object represents a date and time:| ruby-doc.org