Editing Mutator method (section)

===Ruby===
In [[Ruby (programming language)|Ruby]], individual accessor and mutator methods may be defined, or the metaprogramming constructs <code>attr_reader</code> or <code>attr_accessor</code> may be used both to declare a private variable in a class and to provide either read-only or read-write public access to it respectively.

Defining individual accessor and mutator methods creates space for pre-processing or validation of the data
<syntaxhighlight lang="ruby">
class Student
  def name
    @name
  end

  def name=(value)
    @name=value
  end
end
</syntaxhighlight>

Read-only simple public access to implied <code>@name</code> variable
<syntaxhighlight lang="ruby">
class Student
  attr_reader :name
end
</syntaxhighlight>

Read-write simple public access to implied <code>@name</code> variable
<syntaxhighlight lang="ruby">
class Student
  attr_accessor :name
end
</syntaxhighlight>