I'm trying to get each array link on some interval. For example: I get first link, wait for 30 seconds, next link, wait for 30 seconds another link etc. Here is my code:

var urls = [ 'http://mylink1','http://mylink2','http://mylink3','http://mylink4'];

setInterval(function(){
        urls.forEach(function(entry){
            console.log(entry);
            ajaxd(entry);
            console.log("merge pana aici");
        });
    },30000);

function ajaxd(my_url) {
    $.ajax({
        type : "POST",
        url : my_url,
        success : function(msg) {
            console.log(my_url);
        }
    });
}

And the problem is, after 30 seconds I get all the links. Not first value, wait for 30 seconds, next value and so on..

I'm trying to get each array link on some interval. For example: I get first link, wait for 30 seconds, next link, wait for 30 seconds another link etc. Here is my code:

var urls = [ 'http://mylink1','http://mylink2','http://mylink3','http://mylink4'];

setInterval(function(){
        urls.forEach(function(entry){
            console.log(entry);
            ajaxd(entry);
            console.log("merge pana aici");
        });
    },30000);

function ajaxd(my_url) {
    $.ajax({
        type : "POST",
        url : my_url,
        success : function(msg) {
            console.log(my_url);
        }
    });
}

And the problem is, after 30 seconds I get all the links. Not first value, wait for 30 seconds, next value and so on..

• javascript
• php
• jquery
• arrays

7 Answers 7

EDIT Code updated to cause the loop to repeat.

(function() {

  var urls = ['http://mylink1', 'http://mylink2', 
              'http://mylink3', 'http://mylink4'];

  // Start off at the first element.
  var idx = 0;
  var len = urls.length;

  // Do the next link
  function doNext() {
    var entry = urls[idx];

    console.log(idx + ":" + entry);
    //ajaxd(entry);

    idx++;
    console.log([idx, len]);
    if (idx < len) {
      // Don't do anything special
    }  else {
      // Reset the counter
      idx = 0;
    }
    setTimeout(doNext, 300);      }

  // And the code needs kicked off somewhere
  doNext();

}());//end of function 

Making a foreach will iterate through all the values in the array instantly after the interval.

A better solution is not to iterate...

e.g

var counter = 0;

setInterval(function(){
  if(counter < url.length){
    ajaxd(url[counter]);
    counter++;
  }else
    return;
}, 30000);

If you still want to use forEach to loop the array you can use it with setTimeout not with setInterval.

var urls = ['http://mylink1', 'http://mylink2', 'http://mylink3', 'http://mylink4'],
    interval = 2000, //  = 2s
    increment = 1;

urls.forEach(function(url) {
  var runner = setTimeout(function() {
    // Do your stuff.
    console.log(url);

    clearTimeout(runner);
  }, interval * increment);

  increment = increment + 1;
});

In your closure you use a for loop to request all the items at once.

var urls = ['http://mylink1','http://mylink2','http://mylink3','http://mylink4'],

var request = function(index) {
    $.ajax({
        type : "POST",
        url : urls[index],
        success : function(content) {
            console.log(content);
            if (index + 1 < urls.length) {
                setTimeout(function () {
                    request(index + 1);
                }, 30 * 1000); // 30s
            }
        }
    });
}

request(0);

You are doing it wrong try creating a counter every 30 sec. check this code:

$(document).ready(function(){

    var urls = [ 'http://mylink1','http://mylink2','http://mylink3','http://mylink4'],
        counter = 0;

        obj = {}

    obj.ajaxd = function(my_url) {
        $.ajax({
            type : "POST",
            url : my_url,
            success : function(msg) {
                console.log(my_url);
            }
        });
    }

    obj.leftInterval = setInterval(function(){
        if(urls[counter] != undefined){
            obj.ajaxd(urls[counter]);   
            counter++;
        }else{
            counter = 0;
         }

     },30000);

 });

Use this:

var urls = [ 'http://mylink1','http://mylink2','http://mylink3','http://mylink4'];
urls.reverse();
var interval = setInterval(function(){ 
    if(urls.length == 0){
        clearInterval(interval);
        return;
    }
    var entry = urls.pop();
    console.log(entry);
    ajaxd(entry);
    console.log("merge pana aici");
}, 30000);

Note that this will change your array. It will remove elements from them until it is empty.

EDIT: Based on the ment by Andrei, added a return statement after clearInterval :) Thanks.