Question

I want to print a key from a given hash key but I can’t find a simple solution:

myhash = Hash.new
myhash["a"] = "bar"

# not working
myhash.fetch("a"){|k|  puts k } 

# working, but ugly
if myhash.has_key("a")?
    puts "a"
end

Is there any other way?

Answer 1

I don’t quite understand. If you already know you want to puts the value "a", then you only need to puts "a".

What would make sense would be to search for the key of a given value, like so:

puts myhash.key 'bar'
=> "a"

Or, if it’s unknown whether the key exists in the hash or not, and you want to print it only if it exists:

puts "a" if myhash.has_key? "a"