如何重新循环setInterval / setTimeout函数

Question

I am trying to re-loop the display of user-inputted string. I am doing this using either setInterval or setTimeout (not sure which one)

So if a user submits 2 entries into a text-box form, those 2 entries will be displayed, one after another, repeatedly.

What follows is my code, taken from: jsfiddle.net/sean1rose/sKadX/4/

frm.submit(function(event) {
    event.preventDefault();
    container.push(txtBox.val());

    var i = 0;

    function myLoop(){
        setInterval(function () {
            output.text(container[i]);
            i++;
            if (i < container.length) {
                myLoop();
            }
        }, 3000)
    }

    myLoop();

    txtBox.val('');
}); 

As my code is now, if you input 2 different strings into the form, one after another, it will display one after the other (w/ a delay), but then it will stop at the last one (it won't re-loop).

How would I fix the code to get it to continuously re-loop the input so that it doesn't stop at the last inputted string, but instead restart at and display the 1st inputted string? (This should hopefully also work for more than 2 inputs. For example, if a user inputs 5 different entries, then it will loop thru and display those 5 over and over again)...

Answer 1

I've modified your fiddle a bit. Now the frm.submit event looks like:

frm.submit(function (event) {
    event.preventDefault();
    container.push(txtBox.val());
    var i = 0; // to initialize the index
    clearInterval(oldHandle); //to make sure only one setInterval is running at any time
    oldHandle = setInterval(function () {
        output.text(container[i]);
        i++;
        if (i == container.length) { //this re-loops your container array once the last element is reached 
            i = 0; //reset the index
        }
    }, 500)

    txtBox.val('');
});

DEMO

Edit: For your follow-up question, I've splice d the container array with the index of the p tag clicked(using jQuery's prevAll )

$(".controlbox").on('dblclick', 'p', function () {
        container.splice($(this).prevAll('p').length, 1);
        $(this).remove();
});

I've also modified the frm.submit event, now it looks like:

oldHandle = setInterval(function () {
    output.text(container[i++%container.length]);
}, 500)

DEMO

Answer 2

frm.submit(function(event) {
  event.preventDefault();
  container.push(txtBox.val());
  console.log(container);
  function myLoop(){
    setInterval(function () {
        var str="";
        for(var i=0;i<container.length;i++){
           str+=container[i]+"<br>";

        }
        output.html(str)
        myLoop();
    }, 3000)
}

myLoop();

txtBox.val('');
});

fiddle: http://jsfiddle.net/tCw8Q/