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Ruby | Hash select!() method

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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 code for Hash.select!() 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}
  
  
# select! Value
puts "Hash a select! form : #{a.select! {|key, value| key < "b"}}\n\n"

                    
Output :
Hash a select! form : {"a"=>100}

Example #2 :
# Ruby code for Hash.select!() method
  
# declaring Hash value
b = {"a" => 100}
  
# declaring Hash value
c = {"a" => 100, "c" => 300, "b" => 200}
  
  
# select! Value
  
puts "Hash b select! form : #{b.select!{|key, value| value < 200}}\n\n"
  
puts "Hash c select! form : #{c.select!{|key, value| key < "b"}}\n\n"

                    
Output :
Hash b select! form : 

Hash c select! form : {"a"=>100}



Last Updated : 07 Jan, 2020
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