lib/scope.rb in expressive-0.0.16 vs lib/scope.rb in expressive-0.0.17

@@ -76,10 +76,20 @@
 
       syntax('set') do |scope, cells|
         scope[cells.first.text_value] = cells[1].eval(scope)
       end
 
+      syntax('$append') do |scope, cells|
+        scope[cells.first.text_value] = [] if scope[cells.first.text_value].nil?
+        addition = cells[1].eval(scope)
+        if addition.is_a?(Array)
+          scope[cells.first.text_value] = scope[cells.first.text_value] | addition
+        else
+          scope[cells.first.text_value] << addition
+        end
+      end
+
       syntax('lookup') do |scope, cells|
         lookup_result = scope.lookups[cells.first.text_value]
         if lookup_result
           key = cells[1].text_value[1..-2]
           if lookup_result.is_a?(Hash)
@@ -112,9 +122,10 @@
           values = date.split('/').map(&:to_i).reverse
           Date.new(values[0], values[1], values[2]).to_time.utc
         end
       end
 
+      define('$id') {|*args| args.first.id }
       define('+') {|a,b| a.to_f + b.to_f }
       define('-') {|a,b| a.to_f - b.to_f }
       define('*') {|a,b| a.to_f * b.to_f }
       define('/') {|a,b| a.to_f / b.to_f }
       define('=') {|a,b| a == b }