Ruby | Comparable Module

# Ruby program to illustrate 
# comparable module

class Geeksforgeeks
    
# include comparable module
include Comparable
attr :name
    
    def <=>(other_name)
        name.length <=> other_name.name.length
    end
    
    def initialize(name)
        @name = name
    end
end

# creating objects
a1 = Geeksforgeeks.new("G")
a2 = Geeksforgeeks.new([3, 5])
a3 = Geeksforgeeks.new("geeks")

# using comparable operator
p a1 < a2 

# using between? method
p a2.between?(a1, a3) 
p a3.between?(a1, a2) 

true
true
false

Instance Method

• < : It compares two objects based on the receiver's method and return true if it return -1 otherwise return false.

  obj<other_obj

• <= : It compares two objects based on the receiver's method and return true if it return -1 or 0 otherwise return false.

  obj<=other_obj

• == : It compares two objects based on the receiver's method and return true if it return 0 otherwise return false.

  obj==other_obj

• > : It compares two objects based on the receiver's method and return true if it return 1 otherwise return false.

  obj>other_obj

• >= : It compares two objects based on the receiver's method and return true if it return 1 or 0 otherwise return false.

  obj>=other_obj

Example: Ruby

# Ruby program to illustrate 
# use of comparisons
 
# defining class
class Geeksforgeeks
 
# include comparable module
include Comparable
attr :name
    
    def <=>(other_name)
        name.length <=> other_name.name.length
    end
    
    def initialize(name)
        @name = name
    end
end
 
# creating objects
a1 = Geeksforgeeks.new("G")
a2 = Geeksforgeeks.new("geeks")
 
 
# using < operator
p a1 < a2 

# using <= operator
p a1 <= a2 

# using == operator
p a1 == a2 

# using >= operator
p a1 >= a2 

# using > operator
p a1 > a2 

Output:

true
true
false
false
false

• between? : This method returns false if the obj <=> min is less than or if obj <=> max is greater than zero. Otherwise, it returns true.

  obj.between?(min, max)

  Example: Ruby

  # Ruby program to illustrate 
  # use of between?  method
  
  # using between? method
  p 7.between?(2, 6) 
  p 'geeks'.between?('geeks', 'gfg')
  

  Output:

  false
  true
  

ankita_saini

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Article Tags :

• Ruby
• Ruby-Built-in-Modules