Mf

Modifier functions. More of an experiment for now with syntactic sugar operators after an idea occurred:

Can Ruby define self infix operators and curry / procify them?

Turns out the answer is yes, yes it can:

[1,2,3,4,5].map(&Mf + 5)
# => [6, 7, 8, 9, 10]

(I should probably put down the Scala book now)

Just a quick rundown of the methods for now

numbers = [1, 2, 3, 4, 5]
# => [1, 2, 3, 4, 5]

numbers.map(&Mf + 5)
# => [6, 7, 8, 9, 10]

numbers.map(&Mf - 5)
# => [-4, -3, -2, -1, 0]

numbers.map(&Mf * 5)
# => [5, 10, 15, 20, 25]

numbers.map(&Mf / 5.0)
# => [0.2, 0.4, 0.6, 0.8, 1.0]

numbers.map(&Mf % 5)
# => [1, 2, 3, 4, 0]

numbers.map(&Mf ** 5)
# => [1, 32, 243, 1024, 3125]

numbers.select(&Mf > 3)
# => [4, 5]

numbers.select(&Mf >= 3)
# => [3, 4, 5]

numbers.select(&Mf < 3)
# => [1, 2]

numbers.select(&Mf <= 3)
# => [1, 2, 3]

numbers.map(&Mf <=> 3)
#=> [-1, -1, 0, 1, 1]

numbers.select(&Mf == 3)
#=> [3]

numbers.select(&Mf === 1..10)
#=> [1, 2, 3, 4, 5]

numbers.map(&Mf >> 3)
#=> [0, 0, 0, 0, 0]

numbers.map(&Mf << 3)
#=> [8, 16, 24, 32, 40]

numbers.map(&Mf | 3)
#=> [3, 3, 3, 7, 7]

numbers.map(&Mf & 3)
#=> [1, 2, 3, 0, 1]

%w(foo bar baz).map(&Mf[0..1])
=> ["fo", "ba", "ba"]

Add this line to your application's Gemfile:

gem 'mf'

And then execute:

$ bundle

Or install it yourself as:

$ gem install mf

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/baweaver/mf. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

The gem is available as open source under the terms of the MIT License.

Everyone interacting in the Mf project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.