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function EventEmitter() {"use strict";
this.listeners = {};
}
EventEmitter.prototype.emit=function(event) {"use strict";
if (!(event in this.listeners)) {
return;
}
this.listeners[event].forEach(function(listener) {
listener.apply(this, arguments);
}.bind(this));
};
EventEmitter.prototype.addListener=function(event, f) {"use strict";
this.listeners[event] = this.listeners[event] || [];
this.listeners[event].push(f);
};
EventEmitter.prototype.removeListener=function(event, f) {"use strict";
if (!(event in this.listeners)) {
return false;
}
var index = this.listeners[event].indexOf(f);
if (index >= 0) {
this.listeners[event].splice(index, 1);
}
};
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