Ruby | Set compare_by_identity() function

The compare_by_identity() is an inbuilt method in Ruby makes the set compare its elements by their identity and returns self. This method may not be supported by all subclasses of Set.

Syntax: s1.name.compare_by_identity()

Parameters: The function does not takes any parameter.

Return Value: It returns self after comparing its elements.

Example 1:

#Ruby program to illustrate the compare_by_identity() method

#requires the set
require "set"

    s1
    = Set[]

#Add 10 to it
      s1
      << 10

#Returns self after comparing internally
         puts s1.compare_by_identity()

             s1
      << 'a'

#Returns self after comparing internally
         puts s1.compare_by_identity()

Output:

Set: {10}
Set: {10, "a"}

Example 2:

#Ruby program to illustrate the clear method

#requires the set
require "set"

    s1
    = Set[]

#Prints s1
      puts s1

#Add 10 to it
          s1
      << 10

         puts s1

#Clears the set and returns self
#which is printed
             puts s1.clear

Output:

Set: {}
Set: {10}
Set: {}

Reference: https://devdocs.io/ruby~2.5/set#method-i-compare_by_identity