functions

Functional

This library facilitates writing code in a more functional style inside Ruby.

Installation

Add this line to your application's Gemfile:

gem 'functional'

And then execute:

$ bundle

Or install it yourself as:

$ gem install functional

Usage

The lambda style allows you to write functions like this

require 'functions'

module PreludeLambdaUsage

  include Functions::Prelude

  Power = ->(p,x) { x**p }.curry
  Square = Power.(2)
  Squares = Map.(Square)
  Sum_Of_Squares2 = Sum < Squares

  Average = After.( [Sum,Length] ).( Divide )

  Gcd = ->(a,b) { (Divisors.(a) & Divisors.(b)).max }  # literal translation of the definition, just as an example

  # Gcd of an array
  GcdA1 = Max < Intersect < Map.(Divisors) # literal translation of the definition
  GcdA2 = ReduceLeft.(Gcd) # faster

  # Lcm of an array in function of Lcm of a pair
  LcmA = ReduceLeft.(Lcm) # the same but without arguments

end

License

This code is currently copyrighted under the AGPL license. See http://www.gnu.org/licenses/agpl.html for more information.

Contributing

• Fork it
• Create your feature branch (git checkout -b my-new-feature)
• Commit your changes (git commit -am 'Add some feature')
• Push to the branch (git push origin my-new-feature)
• Create new Pull Request