Contents

module Traitorous
  module StandardProcs
    class << self
      NOOP = proc { |data| data }

      # a proc that simply passes through it's input as output
      def noop
        NOOP
      end

      # a proc that simply passes through it's input if the input is truthy,
      #   otherwise it returns it's default value
      # @param default_value [Object] the default value to use with data is
      #   falsey
      # @return [Object] returns data || default_value
      def default(default_value)
        proc { |data| data || default_value }
      end

      # This proc calls method_name on data.
      # @param method_name [Symbol, String] method to send data
      # @return [Object] result of calling method_name on data
      def call_on_self(method_name)
        proc { |data| data.send(method_name) }
      end

      # This proc calls klass with :with and passes data as params
      # @param klass [Class, Module, Object] obj to call
      # @param with_method: [Symbol, String] method to send klass with data as params
      def call_on(klass, with_method: :new)
        proc {|data| klass.send(with_method, data)}
      end
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
traitorous-0.6.1	lib/traitorous/standard_procs.rb