keys_with_values.rb

myhash = {:blake => 10, :katie => 10, :steven => 11}
container = []
myhash.each do |name, value|
  container << name if value == 10
end
container

# in a method

def find_keys_with_value(value_to_find)
  myhash = {:blake => 10, :katie => 10, :steven => 11}
  container = []
  myhash.each do |name, value|
    container << name if value == value_to_find
  end
  container
end

find_keys_with_value(10)