小编hey*_*den的帖子

版本列表？

?
  "react": "16.3.1",
  "react-native": "0.55.4"
  "socket.io-client": "^2.1.1"
?

客户端中app.js中的代码？

.....
import io from 'socket.io-client/dist/socket.io';
const server = "https://xxx.xxx.xxx.xxx/";
let socket = io(server, {
  'reconnection'        : true,
  'reconnectionDelay'   : 500,
  'reconnectionAttempts': Infinity,
  'transports'          : ['websocket']
});

socket.on('connect', () => {
  console.log("connect");
});
......

nodeJS服务器代码

....
const io  = require('socket.io')(httpsServer);
....
let clients = {};
let count = 0;

io.on('connection', function (socket) {
  clients[socket.id] = socket;

  socket.emit("all message", 'data'); //send successfully

  socket.on("disconnect",() => {
    console.log("disconnect"); // Disconnect after 30 seconds
    delete …

当函数返回Multidimensional Arrays(数组全部是num)时,结果是num？

function show(){
    return [1,2][1,2];
}
function show1(){
    return [0,1,2][1,2];
}
function show2(){
    return [0,1,2,3,4,5,6,7,8,9,10,11,12][[0,1,2,[5,9,8,6][2,1,5,0],4,6][1,2,3]];
}
console.log(show());//undefined
console.log(show1());//2
console.log(show2());//5