diff --git a/src/js/parser/javascript/match.js b/src/js/parser/javascript/match.js
index 58de80c..f3f8925 100644
--- a/src/js/parser/javascript/match.js
+++ b/src/js/parser/javascript/match.js
@@ -47,22 +47,16 @@ export default _.extend({}, Base, {
 
   parts() {
     return _.reduce(this._parts.elements, function(result, node) {
-      var last = result.pop();
+      var last = _.last(result);
 
-      if (last) {
-        if (node.elements[0].type === 'literal' && node.elements[1].textValue === '' && last.elements[0].type === 'literal' && last.elements[1].textValue === '') {
-          last = _.clone(last, true);
-          last.textValue += node.textValue;
-          last.elements[0].textValue += node.elements[0].textValue;
-          last.elements[0].literal.textValue += node.elements[0].literal.textValue;
-          last.elements[1] = node.elements[1];
-          node = last;
-        } else {
-          result.push(last);
-        }
+      if (last && node.elements[0].type === 'literal' && node.elements[1].textValue === '' && last.elements[0].type === 'literal' && last.elements[1].textValue === '') {
+        last.textValue += node.textValue;
+        last.elements[0].textValue += node.elements[0].textValue;
+        last.elements[0].literal.textValue += node.elements[0].literal.textValue;
+      } else {
+        result.push(node);
       }
 
-      result.push(node);
       return result;
     }, []);
   }