math: ruby wants leading 0s to floating points numbers

1 files changed, 5 insertions, 0 deletions

diff --git a/data/rbot/plugins/math.rb b/data/rbot/plugins/math.rb
index 081c9c04..a6baa709 100644
--- a/data/rbot/plugins/math.rb
+++ b/data/rbot/plugins/math.rb
@@ -39,6 +39,11 @@ class MathPlugin < Plugin
       expr.gsub!(/\b#{k}\b/, v)
     }
 
+    # ruby doesn't like floating-point values without a 0
+    # in front of them, so find any non-digit followed by
+    # a .<digits> and insert a 0 before the .
+    expr.gsub!(/(\D|^)(\.\d+)/,'\10\2')
+
     while expr =~ /(exp ([\w\d]+))/
       exp = $1
       val = Math.exp($2).to_s