Any way to determine which object called a method?

Question

I\'m hoping that Ruby\'s message-passing infrastructure means there might be some clever trick for this.

How do I determine the calling object -- which object called

Answer 1

Technology at its finest:

 1  # phone.rb
 2  class Phone
 3    def caller_id
 4      caller
 5    end
 6  end
 7  
 8  class RecklessDriver
 9    def initialize
10      @phone = Phone.new
11    end
12    def dial
13      @phone.caller_id
14    end
15  end
16  
17  p = Phone.new
18  p.caller_id.inspect   # => ["phone.rb:18:in `
'"]
19  
20  macek = RecklessDriver.new
22  macek.dial.inspect    # => ["phone.rb:13:in `dial'", "phone.rb:22:in `
'"]

Note: Line number for demonstrative purposes. phone.rb:X refers to Line X of the script.

Look at phone.rb:13! This dial method is what sent the call! And phone.rb:22 refers to the reckless driver that used the dial method!