Ruby

=begin
On Sat, Oct 2, 2010 at 09:41, Semyon Perepelitsa [email protected] wrote:

Feature #3897: Pathname sub_ext! method
http://redmine.ruby-lang.org/issues/show/3897

Author: Semyon Perepelitsa
Status: Open, Priority: Low
Category: lib

There is already sub_ext method for Pathname, but there is no sub_ext! to modify the object itself instead of returning a new one.

Pathname is a value object so having methods that modify it is, well,
rather a big no-no.

http://c2.com/cgi/wiki?ValueObject

(Note how the article uses strings as an example, which sadly aren’t
immutable in Ruby.)

=end