Add removeAllListeners

doc/api.txt

@@ -263,6 +263,9 @@ server.addListener("connection", function (socket) {
 Remove a listener from the listener array for the specified event.
 *Caution*: changes array indices in the listener array behind the listener.
 
++emitter.removeAllListeners(event)+ ::
+Removes all listeners from the listener array for the specified event.
+
 +emitter.listeners(event)+ ::
 Returns an array of listeners for the specified event. This array can be
 manipulated, e.g. to remove listeners.

src/node.js

@@ -186,6 +186,12 @@ var eventsModule = createInternalModule('events', function (exports) {
     return this;
   };
 
+  process.EventEmitter.prototype.removeAllListeners = function (type) {
+    // does not use listeners(), so no side effect of creating _events[type]
+    if (!type || !this._events || !this._events.hasOwnProperty(type)) return this;
+    this._events[type].length = 0;
+  };
+
   process.EventEmitter.prototype.listeners = function (type) {
     if (!this._events) this._events = {};
     if (!this._events.hasOwnProperty(type)) this._events[type] = [];

test/simple/test-event-emitter-modify-in-emit.js

@@ -30,3 +30,9 @@ assert.deepEqual(["callback1", "callback2"], callbacks_called);
 e.emit("foo");
 assert.equal(0, e.listeners("foo").length);
 assert.deepEqual(["callback1", "callback2"], callbacks_called);
+
+e.addListener("foo", callback1);
+e.addListener("foo", callback2);
+assert.equal(2, e.listeners("foo").length)
+e.removeAllListeners("foo")
+assert.equal(0, e.listeners("foo").length)