Question

我需要在socket.io事件中使用从前端传递的不同变量创建同一函数的多个实例。我还需要这些变量对另一个socket.io事件可见，以便我可以从前端单击停止该功能。我的一切都很好，但我只能用一个带变量的实例＆＃39; bigLoop＆＃39;并需要它为多个实例工作。我需要所有的循环能够运行并且彼此独立。

套接字事件：

＆＃13;

    //this is what I have so far and it works great, I can start and stop at any time. And I know bigLoop is global
    io.on('connection', function(connect) {
        //create new loop
       connect.on('createLoop', function(data) {
           bigLoop = new syncLoop(data.total, function(){}, function(){});
       });
        //end loop
       connect.on('endLoop', function(data) {
           bigLoop.break(true);
       });
    });



  //this is what I would like passing an array of multiple variables from the front end and creating a new syncLoop for each variable
        //create new loop
        connect.on('createLoop', function(data) {
           //save array to variable
           var newNames = data.array;
           //for each variable create new syncLoop
           newNames.forEach(function(newLoops) {
               newloops = new syncLoop(data.total, function(){}, function()  {});
           });
        });
           
        //end loop
       connect.on('endLoop', function(data) {
           //save array to variable
           var endNames = data.array;
           //for each variable end loop
           endNames.forEach(function(endLoops){
               endLoops.break(true);
           });
          
       });




//syncLoop function, for process and exit I have a lot more going on but did not want to write it
function syncLoop(iterations, process, exit){  
	var	index = 0,
	    done = false,
	    shouldExit = false;

    loop = {
        next:function(){
            if(done){
                if(shouldExit && exit){
                    return exit(); // Exit if we're done
                }
            }
            // If we're not finished
            if(index < iterations){
                index++; // Increment our index
                process(loop); // Run our process, pass in the loop
            // Otherwise we're done
            } else {
                done = true; // Make sure we say we're done
                if(exit) exit(); // Call the callback on exit
            }
        },
        iteration:function(){
            return index - 1; // Return the loop number we're on
        },
        break:function(end){
            done = true; // End the loop
            shouldExit = end; // Passing end as true means we still call the exit callback
        }
    };
    loop.next();
    return loop;
};

＆＃13;

我尝试了很多不同的东西，但是我无法让它发挥作用。我感谢任何帮助。谢谢。

Answer 1

如果我理解你的问题：

尝试创建所有正在运行的循环的全局映射：

// global variable
var loops = {};

function createLoop(name, data) {
  stopLoop(name);
  loops[name] = new syncloop(/*...*/);
}

function stopLoop(name) {
  if (loops[name]) {
    loops[name].break(true);
    delete loops[name]; // remove entry from map
  }
}

变量loops将按名称包含所有当前运行的循环。

在Socket.io事件中，每次使用不同的变量创建同一函数的多个实例

1 个答案: