Ruby | Hash merge! function Last Updated : 07 Jan, 2020 Summarize Comments Improve Suggest changes Share Like Article Like Report Hash#merge!() : merge!() is a Hash class method which can add the content the given hash array to the other. Entries with duplicate keys are overwritten with the values from each other_hash successively if no block is given. Syntax: Hash.merge!() Parameter: Hash values Return: add the content the given hash array to the other Example #1 : Ruby # Ruby code for Hash.merge!() 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} # merge! Value puts "Hash a merge! form : #{a.merge!(b)}\n\n" puts "Hash b merge! form : #{b.merge!(c)}\n\n" puts "Hash c merge! form : #{c.merge!(a)}\n\n" Output : Hash a merge! form : {:a=>100, :b=>200, :c=>300} Hash b merge! form : {:a=>100, :c=>300, :b=>200} Hash c merge! form : {:a=>100, :b=>200, :c=>300} Example #2 : Ruby # Ruby code for Hash.merge!() 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} # merge! Value puts "Hash a merge! form : #{a.merge!(b)}\n\n" puts "Hash b merge! form : #{b.merge!(c)}\n\n" puts "Hash c merge! form : #{c.merge!(a)}\n\n" Output : Hash a merge! form : {"a"=>100, "b"=>200} Hash b merge! form : {"a"=>100, "c"=>300, "b"=>200} Hash c merge! form : {"a"=>100, "c"=>300, "b"=>200} Comment More infoAdvertise with us Next Article Ruby | Regexp hash() function K Kirti_Mangal Follow Improve Article Tags : Ruby Ruby-Methods Ruby Hash-class Similar Reads Ruby | Hash merge function Hash#merge() is a Hash class method which combines two hash arrays and their content. Syntax: Hash.merge() Parameter: Hash values Return: combine two hash arrays Example #1 : Ruby # Ruby code for Hash.merge() method # declaring Hash value a = {a:100, b:200} # declaring Hash value b = {a:100, c:300, 2 min read Ruby | Range hash() function The hash() is an inbuilt method in Ruby returns a hash-code for the given range. The hash-value will vary for every execution. Syntax: range1.hash() Parameters: The function accepts no parameter. Return Value: It returns a hash-code for the given range. Example 1: Ruby # Ruby program for hash() # me 1 min read Ruby | Hash member? function Hash#member?() is a Hash class method which checks whether the given key is present in hash is not. Syntax: Hash.member?() Parameter: Hash values Return: true - if given key is present in hash otherwise return false Example #1 : Ruby # Ruby code for Hash.member?() method # declaring Hash value a = { 2 min read Ruby | Regexp hash() function Regexp#force_encoding?() : force_encoding?() is a Regexp class method which returns the hash based on the text and options of this regular expression. Syntax: Regexp.hash() Parameter: Regexp values Return: the hash based on the text and options of this regular expression. Example #1 : Ruby # Ruby co 1 min read Ruby | Hash key() function Hash#key() is a Hash class method which gives the key value corresponding to the value. If value doesn't exist then return nil. Syntax: Hash.key() Parameter: Hash values Return: key corresponding to the value nil - If value doesn't exist Example #1 : Ruby # Ruby code for Hash.key() method # declarin 2 min read Ruby | Hash key?() function Hash#key?() is a Hash class method which checks whether the key corresponding to the value is present or not. Syntax: Hash.key?() Parameter: Hash values Return: true - if key corresponding to the value is present otherwise return false Example #1 : Ruby # Ruby code for Hash.key?() method # declaring 2 min read Like