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Ruby | Hash merge! function
  • Last Updated : 07 Jan, 2020

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 :



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# 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"

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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 :

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# 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"

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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}





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