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@@ -294,7 +294,7 @@ class _WSModule extends CoreClass {
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return new Promise(resolve => {
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// create room if it doesn't exist, and add socketId to array
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if (WSModule.rooms[room]) {
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- if (!(socketId in WSModule.rooms[room])) WSModule.rooms[room].push(socketId);
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+ if (WSModule.rooms[room].indexOf(socketId) === -1) WSModule.rooms[room].push(socketId);
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} else WSModule.rooms[room] = [socketId];
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return resolve();
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