redux-chat项目 重复发送消息的问题

[lcoder]

聊天项目中，服务启动的时候。当发送newMessage的时候 在redux-chat/src/server/io.js中

socket.rooms.forEach( ( room , index )=>{
        console.log( 'should leave room , skip first one' ) ;
        if( index > 0 ){
            socket.leave( room ) ;
        }
    } ) ;

控制台报错了

/zexeo_tutorials/redux-chat/src/server/io.js:50
	socket.rooms.forEach(function (room, index) {
	             ^
TypeError: socket.rooms.forEach is not a function
    at switchRoom (/Users/maotingfeng/demo/zexeo_tutorials/redux-chat/src/server/io.js:45:15)
    at Socket.<anonymous> (/Users/maotingfeng/demo/zexeo_tutorials/redux-chat/src/server/io.js:15:13)
    at emitOne (events.js:96:13)
    at Socket.emit (events.js:188:7)
    at /Users/maotingfeng/demo/zexeo_tutorials/redux-chat/node_modules/socket.io/lib/socket.js:503:12
    at _combinedTickCallback (internal/process/next_tick.js:67:7)
    at process._tickDomainCallback (internal/process/next_tick.js:122:9)

返回的socket.rooms类型为Object了，不是Array类型了，不知道怎么处理？