lib/ms/in_silico/spectrum.rb in ms-in_silico-0.3.0 vs lib/ms/in_silico/spectrum.rb in ms-in_silico-0.4.0

@@ -147,11 +147,11 @@
           end
 
           hash = {}
           0.upto(residues_to_locate.length-1) do |index|
             letter = residues_to_locate[index, 1]
-            byte = letter[0]
+            byte = letter[0,1].ord
             hash[letter] = locations[byte]
           end
 
           [ladder, hash]
         end
@@ -452,6 +452,6 @@
       def handle_unknown_series(s)
         raise ArgumentError, "unknown series: #{s}"
       end
     end
   end
-end
\ No newline at end of file
+end