basic-node-tcp-chat-server.js

( function () {
  var
    net,
    sockets
  ;

  net = this.require( "net" );
  sockets = [];

  net
    .createServer( function ( socket ) {
      sockets.push( socket );
      socket.on( "data", function ( data ) {
        for (
          var
            a = 0,
            b = sockets.length
          ; a < b; a++
        ) {
          if ( sockets[ a ] !== socket ) {
            sockets[ a ].write( data );
          }
        }
      } );
      socket.on( "end", function () {
        var
          socket_index
        ;

        socket_index = sockets.indexOf( socket );

        sockets.splice( socket_index, 1 );
      } );
    } )
    .listen( 8000 )
  ;
} ).call( this );