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509bba0_unpacked_with_node_modules/~/events/events.js
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310
509bba0_unpacked_with_node_modules/~/events/events.js
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// Copyright Joyent, Inc. and other Node contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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function EventEmitter() {
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this._events = this._events || {};
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this._maxListeners = this._maxListeners || undefined;
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}
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module.exports = EventEmitter;
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// Backwards-compat with node 0.10.x
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EventEmitter.EventEmitter = EventEmitter;
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EventEmitter.prototype._events = undefined;
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EventEmitter.prototype._maxListeners = undefined;
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// By default EventEmitters will print a warning if more than 10 listeners are
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// added to it. This is a useful default which helps finding memory leaks.
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EventEmitter.defaultMaxListeners = 10;
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// Obviously not all Emitters should be limited to 10. This function allows
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// that to be increased. Set to zero for unlimited.
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EventEmitter.prototype.setMaxListeners = function(n) {
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if (!isNumber(n) || n < 0 || isNaN(n))
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throw TypeError('n must be a positive number');
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this._maxListeners = n;
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return this;
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};
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EventEmitter.prototype.emit = function(type) {
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var er, handler, len, args, i, listeners;
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if (!this._events)
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this._events = {};
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// If there is no 'error' event listener then throw.
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if (type === 'error') {
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if (!this._events.error ||
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(isObject(this._events.error) && !this._events.error.length)) {
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er = arguments[1];
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if (er instanceof Error) {
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throw er; // Unhandled 'error' event
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} else {
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// At least give some kind of context to the user
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var err = new Error('Uncaught, unspecified "error" event. (' + er + ')');
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err.context = er;
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throw err;
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}
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}
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}
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handler = this._events[type];
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if (isUndefined(handler))
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return false;
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if (isFunction(handler)) {
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switch (arguments.length) {
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// fast cases
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case 1:
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handler.call(this);
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break;
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case 2:
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handler.call(this, arguments[1]);
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break;
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case 3:
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handler.call(this, arguments[1], arguments[2]);
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break;
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// slower
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default:
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args = Array.prototype.slice.call(arguments, 1);
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handler.apply(this, args);
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}
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} else if (isObject(handler)) {
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args = Array.prototype.slice.call(arguments, 1);
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listeners = handler.slice();
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len = listeners.length;
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for (i = 0; i < len; i++)
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listeners[i].apply(this, args);
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}
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return true;
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};
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EventEmitter.prototype.addListener = function(type, listener) {
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var m;
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if (!isFunction(listener))
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throw TypeError('listener must be a function');
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if (!this._events)
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this._events = {};
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// To avoid recursion in the case that type === "newListener"! Before
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// adding it to the listeners, first emit "newListener".
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if (this._events.newListener)
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this.emit('newListener', type,
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isFunction(listener.listener) ?
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listener.listener : listener);
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if (!this._events[type])
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// Optimize the case of one listener. Don't need the extra array object.
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this._events[type] = listener;
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else if (isObject(this._events[type]))
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// If we've already got an array, just append.
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this._events[type].push(listener);
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else
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// Adding the second element, need to change to array.
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this._events[type] = [this._events[type], listener];
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// Check for listener leak
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if (isObject(this._events[type]) && !this._events[type].warned) {
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if (!isUndefined(this._maxListeners)) {
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m = this._maxListeners;
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} else {
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m = EventEmitter.defaultMaxListeners;
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}
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if (m && m > 0 && this._events[type].length > m) {
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this._events[type].warned = true;
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console.error('(node) warning: possible EventEmitter memory ' +
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'leak detected. %d listeners added. ' +
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'Use emitter.setMaxListeners() to increase limit.',
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this._events[type].length);
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if (typeof console.trace === 'function') {
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// not supported in IE 10
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console.trace();
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}
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}
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}
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return this;
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};
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EventEmitter.prototype.on = EventEmitter.prototype.addListener;
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EventEmitter.prototype.once = function(type, listener) {
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if (!isFunction(listener))
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throw TypeError('listener must be a function');
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var fired = false;
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function g() {
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this.removeListener(type, g);
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if (!fired) {
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fired = true;
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listener.apply(this, arguments);
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}
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}
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g.listener = listener;
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this.on(type, g);
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return this;
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};
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// emits a 'removeListener' event iff the listener was removed
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EventEmitter.prototype.removeListener = function(type, listener) {
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var list, position, length, i;
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if (!isFunction(listener))
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throw TypeError('listener must be a function');
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if (!this._events || !this._events[type])
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return this;
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list = this._events[type];
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length = list.length;
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position = -1;
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if (list === listener ||
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(isFunction(list.listener) && list.listener === listener)) {
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delete this._events[type];
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if (this._events.removeListener)
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this.emit('removeListener', type, listener);
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} else if (isObject(list)) {
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for (i = length; i-- > 0;) {
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if (list[i] === listener ||
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(list[i].listener && list[i].listener === listener)) {
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position = i;
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break;
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}
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}
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if (position < 0)
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return this;
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if (list.length === 1) {
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list.length = 0;
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delete this._events[type];
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} else {
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list.splice(position, 1);
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}
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if (this._events.removeListener)
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this.emit('removeListener', type, listener);
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}
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return this;
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};
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EventEmitter.prototype.removeAllListeners = function(type) {
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var key, listeners;
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if (!this._events)
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return this;
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// not listening for removeListener, no need to emit
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if (!this._events.removeListener) {
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if (arguments.length === 0)
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this._events = {};
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else if (this._events[type])
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delete this._events[type];
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return this;
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}
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// emit removeListener for all listeners on all events
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if (arguments.length === 0) {
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for (key in this._events) {
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if (key === 'removeListener') continue;
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this.removeAllListeners(key);
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}
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this.removeAllListeners('removeListener');
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this._events = {};
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return this;
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}
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listeners = this._events[type];
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if (isFunction(listeners)) {
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this.removeListener(type, listeners);
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} else if (listeners) {
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// LIFO order
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while (listeners.length)
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this.removeListener(type, listeners[listeners.length - 1]);
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}
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delete this._events[type];
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return this;
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};
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EventEmitter.prototype.listeners = function(type) {
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var ret;
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if (!this._events || !this._events[type])
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ret = [];
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else if (isFunction(this._events[type]))
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ret = [this._events[type]];
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else
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ret = this._events[type].slice();
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return ret;
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};
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EventEmitter.prototype.listenerCount = function(type) {
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if (this._events) {
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var evlistener = this._events[type];
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if (isFunction(evlistener))
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return 1;
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else if (evlistener)
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return evlistener.length;
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}
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return 0;
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};
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EventEmitter.listenerCount = function(emitter, type) {
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return emitter.listenerCount(type);
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};
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function isFunction(arg) {
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return typeof arg === 'function';
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}
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function isNumber(arg) {
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return typeof arg === 'number';
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}
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function isObject(arg) {
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return typeof arg === 'object' && arg !== null;
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}
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function isUndefined(arg) {
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return arg === void 0;
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}
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//////////////////
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// WEBPACK FOOTER
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// ./~/events/events.js
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// module id = 74
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// module chunks = 4
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