Ruby | Hash include?() function Last Updated : 07 Jan, 2020 Summarize Comments Improve Suggest changes Share Like Article Like Report Hash#include?() is a Hash class method which checks whether the given key is present in hash. Syntax: Hash.include?() Parameter: Hash values Return: true - if given key"" is present in hash otherwise return false Example #1 : Ruby # Ruby code for Hash.has_value?() 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} # has_value? Value puts "Hash a has_value? form : #{a.include?("a")}\n\n" puts "Hash b has_value? form : #{b.has_value?("c")}\n\n" puts "Hash c has_value? form : #{c.has_value?("c")}\n\n" Output : Hash a has_value? form : false Hash b has_value? form : false Hash c has_value? form : false Example #2 : Ruby # Ruby code for Hash.has_value?() 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} # has_value? Value puts "Hash a has_value? form : #{a.include?("a")}\n\n" puts "Hash b has_value? form : #{b.has_value?("c")}\n\n" puts "Hash c has_value? form : #{c.has_value?("c")}\n\n" Output : Hash a has_value? form : true Hash b has_value? form : false Hash c has_value? form : false Comment More infoAdvertise with us Next Article Ruby | Hash include?() function K Kirti_Mangal Follow Improve Article Tags : Ruby Ruby-Methods Ruby Hash-class Similar Reads Ruby | Hash invert() function Hash#invert() is a Hash class method which gives the hash by reverting keys to values and values to key. Syntax: Hash.invert() Parameter: Hash values Return: hash by reverting keys to values and values to key Example #1 : Ruby # Ruby code for Hash.invert() method # declaring Hash value a = {a:100, b 2 min read Ruby | Hash inspect() function Hash#inspect() is a Hash class method which gives the string representation of hash. Syntax: Hash.inspect()Parameter: Hash valuesReturn: string representation of the hash Example #1 :Â Ruby # Ruby code for Hash.inspect() method # declaring Hash value a = {a:100, b:200} # declaring Hash value b = {a: 1 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 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 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 Like