I would follow Rake::Task's API, so instead of Rake::NameSpace::get, Rake::NameSpace::[] to look up a namespace:

Rake::NameSpace['namespace_name'].clear

… so I'm for it. Also, there's only one method in Rake that has get in it, which is why I prefer [].

I wrote get because NameSpace already have [] method that finds tasks in namespace. Changing it's functionality could break API for some people.

That one is on a Rake::Namespace instance, the one I propose would be on the Rake::Namespace class. For example:

namespace :n do
  task :t do
    puts 'work'
  end
end

my_namespace = Rake::Namespace['n'] # namespace "n"
my_task = my_namespace['t'] # task "n:t"

This would match Rake::Task['some_task'] (implemented here inside class << self)

Great. Looks perfect!

hey is this already in progress? I just ran into the need for this functionality myself and would be glad to implement it quickly and send a PR if nobody else is working on it