[removed] setTimeout doesn't pause the loop

Question

I need to make some delays in my loop, every time after some amount of data (after a few cycles/iterations through my loop) is sent to the server.

Sending data and recei

Answer 1

when you run your code, while loop won't wait for setTimeout because it is async.

but you can do following to make your code work.

var p = 0;
var k = 0;
var now = new Date();
var code = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20];
for (var index = 0; index < code.length; index++) {
    (function(idx, timeout){
        setTimeout(function(i) {
            //write your code herei
            console.log("printed after", (new Date() - now)/1000, " Seconds");

        }, timeout, idx);
        p++;
        if(p==5){
            p = 0;
            k += 5000;
        }
    })(index, k);
}

Following is the output

printed after 0.006  Seconds
printed after 0.008  Seconds
printed after 0.008  Seconds
printed after 0.008  Seconds
printed after 0.008  Seconds
printed after 5.008  Seconds
printed after 5.008  Seconds
printed after 5.008  Seconds
printed after 5.008  Seconds
printed after 5.008  Seconds
printed after 10.007  Seconds
printed after 10.007  Seconds
printed after 10.007  Seconds
printed after 10.007  Seconds
printed after 10.007  Seconds
printed after 15.008  Seconds
printed after 15.008  Seconds
printed after 15.008  Seconds
printed after 15.008  Seconds
printed after 15.008  Seconds

Answer 2

You are continuously spawning multiple calls to process() immediately in the while and then telling process to wait 5 seconds before that callback happens.

// Run this loop over and over again
while (true) {
    // Create a function called process that process data
    var process = (function () {
        // Do something with data
        console.log("Something");
        // Wait a few seconds and do it again
        setTimeout(process, 5000);
    // This () right here says call process right now
    }());
}