Question

How do I store data in array within a loop?

    var images;
    var i = 0;

    $('#cover div').each(function()
    {
        alert($(this).attr('id'));
        //I should store id in an array
    });


    <div id="cover">
        <div id="slider_1"><p class="content">SLIDER ONE</p></div>
        <div id="slider_2"><p class="content">SLIDER TWO</p></div>
        <div id="slider_3"><p class="content">SLIDER THREE</p></div>
    </div>

Answer 1

Try this,

var arr = [];
i = 0;
$('#cover div').each(function()
{
        alert($(this).attr('id'));
        arr[i++] = $(this).attr('id');
        //I should store id in an array
});

other Way for getting id using javascript object instead of jquery for increasing performance.

var arr = [];
i = 0;
$('#cover div').each(function()
{
      arr[i++] = this.id;
});

Edit You can also use jQuery map()

Live Demo

arr = $('#cover div').map(function(){
    return this.id;
});