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 :
a = {a:100, b:200}
b = {a:100, c:300, b:200}
c = {a:100}
puts "Hash a key form : #{a.key(200)}\n\n"
puts "Hash b key form : #{b.key(100)}\n\n"
puts "Hash c key form : #{c.key(200)}\n\n"
|
Output :
Hash a key form : b
Hash b key form : a
Hash c key form :
Example #2 :
a = { "a" => 100, "b" => 200 }
b = {"a" => 100}
c = {"a" => 100, "c" => 300, "b" => 200}
puts "Hash a key form : #{a.key(200)}\n\n"
puts "Hash b key form : #{b.key(100)}\n\n"
puts "Hash c key form : #{c.key(200)}\n\n"
|
Output :
Hash a key form : b
Hash b key form : a
Hash c key form : b
Whether you're preparing for your first job interview or aiming to upskill in this ever-evolving tech landscape,
GeeksforGeeks Courses are your key to success. We provide top-quality content at affordable prices, all geared towards accelerating your growth in a time-bound manner. Join the millions we've already empowered, and we're here to do the same for you. Don't miss out -
check it out now!
Last Updated :
07 Jan, 2020
Like Article
Save Article