Contents

module Kernel
  # Composes a list of functions.
  # Functions can be specified as symbols or lambdas.
  #   ["foo bar", "baz qux"].map &fn(:split, :last)
  #   #=> ["bar", "qux"]
  #
  #   (1..3).map &fn(:next, -> x { x * x }, -> x { x.to_f / 2 } )
  #   #=> [2.0, 4.5, 8.0]
  def fn(*funs)
    -> x do
      funs.inject(x) do |v,f|
        Proc === f ? f.call(v) : v.send(f)
      end
    end
  end

  private :fn
end

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
shenanigans-1.0.11	lib/shenanigans/kernel/fn.rb
shenanigans-1.0.10	lib/shenanigans/kernel/fn.rb
shenanigans-1.0.9	lib/shenanigans/kernel/fn.rb