Replaced loop in render method with dynamic RegExp

- Using a dynamic RegExp to perform the "replace-all" action in the render function.

lib/textlates.js

@@ -1,24 +1,20 @@
 var fs = require('fs');
 
-function render(file, data, cb){
-  var found = {};
+function render(template, vars, cb){
+  fs.readFile(template, 'utf8', function(err, template){
+    if(err) return cb(err);
 
-  fs.readFile(file, 'utf8', function(err, file){
-    if(err)
-      return cb(err);
+    var replacementRegex
+      , identifier
+      ;
 
-    var values = file.match(/#{[^}\r\n]*}/g);
-
-    for(var value in values){
-      value = values[value].substring(2, values[value].length - 1);; 
-
-      if(!found[value]){
-        file = file.replace('#{' + value + '}', data[value]);
-        found[value] = true;
-      }
+    for (identifier in vars) {
+      // Create dynamic regex that will find and replace all instances of the identifier
+      replacementRegex = new RegExp('#{' + identifier + '}', 'g'); 
+      template = template.replace(replacementRegex, vars[identifier]);
     }
 
-    return cb(null, file);
+    return cb(null, template);
   });
 }
 

test/test.txt

@@ -2,7 +2,7 @@ Hello #{name}.
 
 A standard greeting may look like this:
 
-#{greeting}
+#{greeting}, #{name}
 
 How does that look to you?