From: Nathan Beyer <nbeyer@...>
Date: 2010-03-12T08:55:25+09:00
Subject: result of assignment is not the return value

Given a simple class like this

class MyClass
  attr_reader :value
  def value=(val)
    @value = val.to_s
  end
end

Why the the following code return the value passed and not the value
assigned?

c = MyClass.new
result = c.value = 2
puts result
puts c.value

This is currently outputing

2
"2"

The results are the same when MyClass is modified to be this.

class MyClass
  attr_reader :value
  def value=(val)
    @value = val.to_s
    return @value
  end
end

Shouldn't the result of the 'value=' method be the return value?