sonic-pi

https://github.com/sonic-pi-net/sonic-pi

C++

Code. Music. Live.

Hash#slice

Slice a hash to include only the given keys. This is useful for
limiting an options hash to valid keys before passing to a method:

  def search(criteria = {})
    criteria.assert_valid_keys(:mass, :velocity, :time)
  end

  search(options.slice(:mass, :velocity, :time))

If you have an array of keys you want to limit to, you should splat them:

  valid_keys = [:mass, :velocity, :time]
  search(options.slice(*valid_keys))

Source | Google | Stack overflow

Edit

git clone [email protected]:sonic-pi-net/sonic-pi.git

cd sonic-pi

open app/server/ruby/vendor/activesupport/lib/active_support/core_ext/hash/slice.rb

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-Hash-slice-for-pr

# Commit to git

git add app/server/ruby/vendor/activesupport/lib/active_support/core_ext/hash/slice.rbgit commit -m "better docs for Hash#slice"

# Open pull request

gem install hub # on a mac you can `brew install hub`

hub fork

git push <your name> -your-name--update-docs-Hash-slice-for-pr

hub pull-request

# Celebrate!