lib/scope.rb in expressive-0.0.1 vs lib/scope.rb in expressive-0.0.2

@@ -41,13 +41,13 @@
 
     syntax('set') do |scope, cells|
       scope[cells.first.text_value] = cells[1].eval(scope)
     end
 
-    define('+') {|a,b| a + b }
-    define('-') {|a,b| a - b }
-    define('*') {|a,b| a * b }
-    define('/') {|a,b| a / b }
+    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 }
-    define('sum') {|*args| args.flatten.reduce(:+) }
+    define('sum') {|*args| args.flatten.map(&:to_f).reduce(:+) }
   end
 end