Hash > Operator in Ruby

By IncludeHelp Last updated : December 01, 2024

In the last article, we have seen how we can carry out a comparison between two hash objects with the help of "==" operator? "==" method is a public instance method defined in Ruby’s library.

In this article, we will see the implementation of the ">" operator. The working is pretty clear with the help of its name. It is not as simple as it seems. We will figure it out in the content of this article. We will understand it with the help of syntaxes and demonstrating program codes.

Description and Usage

This method is a public instance method that is defined in Ruby's library especially for Hash class. This method works in a way that it carries out a comparison between two different hashes and returns a Boolean value. The method returns true when the second hash is a subset of first hash and returns false if it is not the subset of the first Hash instance. Being a subset simply means to have all those elements which are present in another Hash object.

Syntax

Hash > Hash_object -> true or false

Parameters

This method does not require any argument.

Example 1

=begin
  Ruby program to demonstrate > operator
=end  

hash1={"color"=>"Black","object"=>"phone","love"=>"mom","fruit"=>"Kiwi","vege"=>"potato","place"=>"null"}

hash2= {"color"=> "Black", "object"=>"phone", "love"=>"mom","fruit"=>"Kiwi","vege"=>"potato"}

if(hash1>hash2)
  puts "hash2 is a subset of hash1"
else
  puts "hash2 is not a subset of hash1"
end

Output

hash2 is a subset of hash1

Explanation

In the above code, you can simply observe that the method has returned true inside the if condition that is because the message is printed as "hash2 is the subset of hash1". This happened because hash2 has all the elements which are present in hash1. This is the simple meaning of subset.

Example 2

=begin
  Ruby program to demonstrate > operator
=end  

hash1= {"color"=> "Black", "object"=>"phone", "love"=>"mom","fruit"=>"Kiwi","vege"=>"potato"}

hash2={"color"=>"Black","object"=>"phone","love"=>"mom","fruit"=>"Kiwi","vege"=>"potato","place"=>"null"}

if(hash1>hash2)
  puts "hash2 is a subset of hash1"
else
  puts "hash2 is not a subset of hash1"
end

Output

hash2 is not a subset of hash1

Explanation

In the above code, you can simply observe that the method has returned false inside the if condition that is because the message is printed as "hash2 is not a subset of hash1". This happened because hash2 is not having all the elements which are present in hash1. This is the simple meaning of subset.

Ruby Hash == Operator

Ruby Hash >= Operator

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