CODEWITHSUNDEEP
rubyobjectmethods
user3163916
user3163916

Reputation: 328

Ruby Get Caller Object's Name Inside Method Using Default Library

I have the following problem. I would like to have a method, let's call it method_A that check the object name that call method_A.

This is a simple reference, but what I'd be doing would be much more complicated than this, I understand that there's an alternative that can solve what I need in a much better way, but alas the code almost done, and I don't have enough time to tweak around much. Anyway, here it goes:

class Picture
  attr_accessor :size

  def resize
    name = self.get_object_name_here
    case name
    when Big #Can be string or variable, I don't mind
      self.size *= .5
    when Medium
    when Small
      self.size *= 2
    else
    end

  def get_object_name_here
    object_name
  end
end

Big = Picture.new
Medium = Picture.new
Small = Picture.new
Big.size = 10
Medium.size = 10
Small.size = 10
Big.resize       => 5
Medium.resize    => 10
Small.resize     => 20

If there's a way to just do

name = object_name

That would be very HELPFUL

Greatly Appreciated!

Edit: Sorry for the capitalized Big, Medium, Small. They are typos.

Upvotes: 0

Views: 132

Answers (1)

Ju Liu
Ju Liu

Reputation: 3999

You'll have to change the definition of your class

class Picture
  attr_accessor :size, :name

  def initialize(name)
    @name = name
    @size = 10
  end

  def resize
    case name
    when "Big"
      self.size *= 0.5
    when "Medium"
    when "Small"
      self.size *= 2
    else
    end
  end
end

The initialize method will be called by Ruby when you use new passing along all the arguments. You can use this class like this:

big = Picture.new("Big")
medium = Picture.new("Medium")
small = Picture.new("Small")

puts "before resize"

puts big.size
puts medium.size
puts small.size

big.resize
medium.resize
small.resize

puts "after resize"

puts big.size
puts medium.size
puts small.size

results in

before resize
10
10
10
after resize
5.0
10
20

Upvotes: 1

Related Questions