events: use null assignment instead of deleting property

12 years ago · 0397223ab4
1 changed files with 2 additions and 2 deletions
--- a/lib/events.js
+++ b/lib/events.js
@ -226,7 +226,7 @@ EventEmitter.prototype.removeListener = function(type, listener) {
    if (position < 0) return this;
    list.splice(position, 1);
    if (list.length == 0)
-      delete this._events[type];
+      this._events[type] = null;

    if (this._events.removeListener) {
      this.emit('removeListener', type, listener);
@ -234,7 +234,7 @@ EventEmitter.prototype.removeListener = function(type, listener) {
  } else if (list === listener ||
             (list.listener && list.listener === listener))
  {
-    delete this._events[type];
+    this._events[type] = null;

    if (this._events.removeListener) {
      this.emit('removeListener', type, listener);