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Ruby | Hash has_key?() function

Last Updated : 07 Jan, 2020

Hash#has_key?() is a Hash class method which checks whether the given key is present in hash.

Syntax: Hash.has_key?()

Parameter: Hash values

Return: true – if the key is present otherwise return false

Example #1 :

# Ruby code for Hash.has_key?() 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_key? Value 
puts "Hash a has_key? form : #{a.has_key?("a")}\n\n"
  
puts "Hash b has_key? form : #{b.has_key?("c")}\n\n"
  
puts "Hash c has_key? form : #{c.has_key?("v")}\n\n"

Output :

Hash a has_key? form : false

Hash b has_key? form : false

Hash c has_key? form : false

Example #2 :

# Ruby code for Hash.has_key?() 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_key? Value 
puts "Hash a has_key? form : #{a.has_key?("a")}\n\n"
  
puts "Hash b has_key? form : #{b.has_key?("c")}\n\n"
  
puts "Hash c has_key? form : #{c.has_key?("v")}\n\n"

Output :

Hash a has_key? form : true

Hash b has_key? form : false

Hash c has_key? form : false

Ruby | Array Concatenation using (+) function

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