Simple example of dynamically defining rake tasks

Rakefile

# Put this in a file called Rakefile
# To see all tasks:
# rake -T 
# To run a task:
# rake task_a
my_tasks = [ "a", "b", "c" ]
my_tasks.each do |task|
  desc "task a"
  task "task_#{task}".intern do
    puts task
  end
end