lib/scope.rb in expressive-0.0.14 vs lib/scope.rb in expressive-0.0.15

@@ -126,9 +126,12 @@
       define('and') {|a,b| !!a && !!b }
       define('or') {|a,b| !!a || !!b }
       define('sum') { |*args| args.flatten.map(&:to_f).reduce(:+) || 0 }
       define('if') { |*args| args.compact!; args[0] ? args[1] : args[2] }
       define('round'){|*args| args[0].to_f.round(args[1]) }
+      define('$days_ago'){|*args| Time.now - args[0].to_i * 86400 }
+      define('$hours_ago'){|*args| Time.now - args[0].to_i * 3600 }
+      define('$minutes_ago'){|*args| Time.now - args[0].to_i * 60 }
     end
 
     def to_hash
       h = self.retrieve_scope.dup
       h.delete_if{|k, v| v.kind_of?(Expressive::Function) || v.kind_of?(Expressive::ExtendedValue)}