How do I return the variables in the last line of this OOP Ruby code?-CodePudding

class Human  # Problem received from Raul Romero
  attr_reader :name 
  
  def initialize(name)
  end
 
end

gilles = Human.new("gilles") 
anna = Human.new("gilles") 

puts anna.equal?(gilles) #should output true # 
puts anna   gilles # should output annagilles

How do I make the last line of code output annagilles?

CodePudding user response：

Alright, there are a couple of things you might need to complete your Human class:

class Human  # Problem received from Raul Romero
  attr_reader :name 
  
  def initialize(name)
    @name = name
  end
end

you need to set the instance variable @name in order to read it.

next your puts anna.equal?(gilles) check wont work because .equal? checks if you are dealing with the same object. likewise "a".equal("a") #=> false, so in your case only anna.equal?(anna) will return true.

then puts anna gilles shouldnt work because you are trying to add two instances together (not their names). so maybe this would work:

gilles = Human.new("gilles") 
anna = Human.new("anna") # note that you have 'gilles' here in your example
puts anna.name   gilles.name #=> 'annagilles'

so in order to get the value you passed to the initialize (which is then set to @name) you need to call that value with .name, ie some_human.name

CodePudding user response：

if you need to get result using then below is the solution

class Human  
  attr_reader :name 
  
  def initialize(name)
      @name = name
  end
  
  def  (other)
    name   other.name
  end  
end

gilles = Human.new("gilles") 
anna = Human.new("anna") 

puts anna.equal?(gilles)  
puts anna   gilles

output

false
annagilles

but i preferred blow solution

class Human  
  attr_reader :name 
  
  def initialize(name)
      @name = name
  end
  
  def  (other)
    Human.new(name   other.name)  
  end
  
  def to_s
    name
  end      
end

gilles = Human.new("gilles") 
anna = Human.new("anna") 

puts anna.equal?(gilles)  
rerult = anna   gilles 
puts rerult.to_s

output

false
annagilles