Module: Selector

Defined in:
lib/selector.rb,
lib/selector/or.rb,
lib/selector/and.rb,
lib/selector/not.rb,
lib/selector/array.rb,
lib/selector/regexp.rb,
lib/selector/nothing.rb,
lib/selector/anything.rb,
lib/selector/function.rb,
lib/selector/condition.rb,
lib/selector/collection.rb

Overview

Composable filters for lists of values

Defined Under Namespace

Classes: And, Anything, Array, Collection, Condition, Function, Not, Nothing, Or, Regexp

Class Method Summary collapse

Class Method Details

.build(clause) ⇒ Selector::Condition

Factory method that builds a condition instance depending on argument type

Parameters:

  • clause (Object)

Returns:



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# File 'lib/selector.rb', line 41

def self.build(clause)
  return clause                 if [ANYTHING, NOTHING].include? clause
  return Regexp.new(clause)     if clause.instance_of? ::Regexp
  return Array.new(clause)      if [::Array, Set].include? clause.class
  return Collection.new(clause) if clause.is_a? Enumerable
  return Function.new(clause)   if clause.respond_to? :call
  Array.new [clause]
end

.new(options) ⇒ Selector::Condition

Creates a condition from options

Parameters:

  • options (Hash)

Returns:



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# File 'lib/selector.rb', line 29

def self.new(options)
  white = options.fetch(:only)   { ANYTHING }
  black = options.fetch(:except) { NOTHING  }
  build(white) - build(black)
end