emitter.removeListener(event, listener)

var callback = function(stream) {   console.log('someone connected!'); }; server.on('connection', callback); // ... server.removeListener('connection', callback);

// emits a 'removeListener' event iff the listener was removed EventEmitter.prototype.removeListener = function(type, listener) {   var list, position, length, i;   if (!util.isFunction(listener))     throw TypeError('listener must be a function');   if (!this._events || !this._events[type])     return this;   list = this._events[type];   length = list.length;   position = -1;   if (list === listener ||       (util.isFunction(list.listener) && list.listener === listener)) {     delete this._events[type];     if (this._events.removeListener)       this.emit('removeListener', type, listener);   } else if (util.isObject(list)) {     for (i = length; i-- > 0;) {       if (list[i] === listener ||           (list[i].listener && list[i].listener === listener)) {         position = i;         break;       }     }     if (position < 0)       return this;     if (list.length === 1) {       list.length = 0;       delete this._events[type];     } else {       list.splice(position, 1);     }     if (this._events.removeListener)       this.emit('removeListener', type, listener);   }   return this; };