hash_largest_value.rb

# return max hash key-value pair
def largest_hash_key(hash)
  hash.max_by{|k,v| v}
end

hash = {"ZZ" => 0, "CA"=>2, "MI"=>1, "NY"=>1}
p largest_hash_key(hash) # return  ["CA", 2]

# return largest hash key pair
p hash.max

# return largest hash key pair
p hash.max_by{|x, v| x}

# return largest hash value pair
p hash.max_by{|x, v| v}