## mark a section (Learn more)

# In reference to http://www.devchix.com/2007/05/25/ruby-dry-up-your-enumerations/ # Examples by Susan Potter [http://susanpotter.net] # Framework code... class ProxyBase attr_accessor :collection def initialize(collection) @collection = collection end end class AnyProxy < ProxyBase def method_missing(sym, *args) @collection.each do |item| return true if item.send(sym, *args) end end end class AllProxy < ProxyBase def method_missing(sym, *args) @collection.each do |item| return false unless item.send(sym, *args) end end end module LinkingVerbMixin def self.included(base) base.extend(ClassMethods) end module ClassMethods def any(collection) AnyProxy.new(collection) end def all(collection) AllProxy.new(collection) end end end class Are include LinkingVerbMixin end class Do include LinkingVerbMixin end # Application code... class Stooge attr_accessor :name, :bald def initialize(name, bald) @name = name @bald = bald end def bald? @bald end end mo = Stooge.new("Mo", true) larry = Stooge.new("Larry", false) curly = Stooge.new("Curly", false) stooges = [mo, larry, curly] Are.all(stooges).bald? Are.any(stooges).bald? # This can be extended further to do stuff like Do.all(stooges).have(:name, :eql?, "Mo"), etc.

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