Ruby | Hash keys() function
Hash#keys() is a Hash class method which gives an array with all the keys present in the hash.
Syntax: Hash.keys()
Parameter: Hash values
Return: array with all the keys present in the hash
Example #1 :
a = {a: 100 , b: 200 }
b = {a: 100 , c: 300 , b: 200 }
c = {a: 100 }
puts "Hash a keys form : #{a.keys()}\n\n"
puts "Hash b keys form : #{b.keys()}\n\n"
puts "Hash c keys form : #{c.keys()}\n\n"
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Output :
Hash a keys form : [:a, :b]
Hash b keys form : [:a, :c, :b]
Hash c keys form : [:a]
Example #2 :
a = { "a" => 100 , "b" => 200 }
b = { "a" => 100 }
c = { "a" => 100 , "c" => 300 , "b" => 200 }
puts "Hash a keys form : #{a.keys()}\n\n"
puts "Hash b keys form : #{b.keys()}\n\n"
puts "Hash c keys form : #{c.keys()}\n\n"
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Output :
Hash a keys form : ["a", "b"]
Hash b keys form : ["a"]
Hash c keys form : ["a", "c", "b"]
Last Updated :
07 Jan, 2020
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