Ruby | Hash size() method Last Updated : 07 Jan, 2020 Summarize Comments Improve Suggest changes Share Like Article Like Report Hash#size() is a Hash class method which returns the count of key-value pair in the hash. Syntax: Hash.size() Parameter: Hash values Return: count of key-value pair in the hash. Example #1 : Ruby # Ruby code for Hash.size() method # declaring Hash value a = {a:100, b:200} # declaring Hash value b = {a:100, c:300, b:200} # declaring Hash value c = {a:100} # size Value puts "Hash a size form : #{a.size}\n\n" puts "Hash b size form : #{b.size}\n\n" puts "Hash c size form : #{c.size}\n\n" Output : Hash a size form : 2 Hash b size form : 3 Hash c size form : 1 Example #2 : Ruby # Ruby code for Hash.size() method # declaring Hash value a = { "a" => 100, "b" => 200 } # declaring Hash value b = {"a" => 100} # declaring Hash value c = {"a" => 100, "c" => 300, "b" => 200} # size Value puts "Hash a size form : #{a.size}\n\n" puts "Hash b size form : #{b.size}\n\n" puts "Hash c size form : #{c.size}\n\n" Output : Hash a size form : 2 Hash b size form : 1 Hash c size form : 3 Comment More infoAdvertise with us Next Article Ruby | Hash to_s method K Kirti_Mangal Follow Improve Article Tags : Ruby Ruby-Methods Ruby Hash-class Similar Reads Ruby | Hash store() method Hash#store() is a Hash class method that returns an add-on value with the key given by the key-value argument. Syntax: Hash.store()Parameter: Hash values key valueReturn: add on value with the key given by the key-value argument. Example #1 : Ruby # Ruby code for Hash.store() method # declaring H 2 min read Ruby | Hash shift() method Hash#shift() is a Hash class method which removes a key-value pair from hash and then it returns these value as two-item array. Syntax: Hash.shift() Parameter: Hash values Return: two-item [key-value] array Example #1 : Ruby # Ruby code for Hash.shift() method # declaring Hash value a = {a:455, b:20 2 min read Ruby | String hash method hash is a String class method in Ruby which is used to return a hash based on the string's length, content and encoding. Syntax: str.hash Parameters: Here, str is the given string. Returns: A hash based on the string's length, content and encoding. Example 1: Ruby # Ruby program to demonstrate # the 1 min read Ruby | Hash to_s method Hash#to_s() is a Hash class method which gives the string representation of the hash. Syntax: Hash.to_s() Parameter: Hash values Return: string representation of the hash. Example #1 : Ruby # Ruby code for Hash.to_s() method # declaring Hash value a = {a:100, b:200} # declaring Hash value b = {a:100 1 min read Ruby | Hash select() method Hash#select() : select() is a Hash class method which finds the array from the hash based on the block condition. Syntax: Hash.select() Parameter: Hash values block condition Return: array from the hash based on the block condition. Example #1 : Ruby # Ruby code for Hash.select() method # declaring 1 min read Ruby | Hash select!() method Hash#select!() is a Hash class method which checks whether the array from the hash ius present based on the block condition. Syntax: Hash.select!() Parameter: Hash values block condition Return: array from the hash is present based on the block condition otherwise return false Example #1 : Ruby # Ru 1 min read Like