Canal

Canal is an utility that builds callable objects out of a chain of method calls. It can be used to write simpler and shorter code that avoids using blocks or lambdas.

Include the canal gem and expose the canal method:

require 'canal'

lambda { |x| x.to_s(2) }
canal.to_s(2)

[1, 2, 3].map { |value| value + 1 }
[1, 2, 3].map(&canal + 1)

[1, 2, 3].select { |value| value > 1 }
[1, 2, 3].select(&canal > 1)

people = [{ name: "Alice" }, { name: "Bob" }]
people.map(&canal[:name])
=> ["Alice", "Bob"]

# Format a 2D array into a grid
rows = [[1, 2], [31, 4]]
puts rows.map(&canal.map(&canal.to_s.ljust(3, ' ')).join).join("\n")
1  2
31 4

Add this line to your application's Gemfile:

gem 'canal'

And then execute:

$ bundle

Or install it yourself as:

$ gem install canal

1. Fork it ( http://github.com/becojo/canal/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request