Class Enumerable::Enumerator
In: enumerator.c
Parent: Object

A class which provides a method `each’ to be used as an Enumerable object.

Methods

each   each_with_index   new   next   rewind   with_index  

Included Modules

Enumerable

Public Class methods

Enumerable::Enumerator.new(obj, method = :each, *args)

Creates a new Enumerable::Enumerator object, which is to be used as an Enumerable object using the given object‘s given method with the given arguments.

Use of this method is not discouraged. Use Kernel#enum_for() instead.

Public Instance methods

enum.each {...}

Iterates the given block using the object and the method specified in the first place. If no block is given, returns self.

e.with_index {|(*args), idx| ... }
e.with_index

Iterates the given block for each elements with an index, which start from 0. If no block is given, returns an enumerator.

e.next => object

Returns the next object in the enumerator, and move the internal position forward. When the position reached at the end, internal position is rewinded then StopIteration is raised.

Note that enumeration sequence by next method does not affect other non-external enumeration methods, unless underlying iteration methods itself has side-effect, e.g. IO#each_line.

e.rewind => e

Rewinds the enumeration sequence by the next method.

e.with_index {|(*args), idx| ... }
e.with_index

Iterates the given block for each elements with an index, which start from 0. If no block is given, returns an enumerator.

[Validate]

ruby-doc.org is hosted and run by James Britt and Happy Camper Studios, a Ruby application development company in Phoenix, Arizona. Ruby-doc.org was created in 2002 to promote the Ruby language and to help other Ruby hackers.

Documentation content on ruby-doc.org is provided by remarkable members of the Ruby community.

For more information on the Ruby programming language, visit ruby-lang.org.

Want to help improve Ruby's API docs? See Ruby Documentation Guidelines.