Question

170

Count elements by id

rated 0 times [ 172] [ 2] / answers: 1 / hits: 16041 / 10 Years ago, tue, may 20, 2014, 12:00:00

I need to be able to set a var with the number of open orders on a website I use.

Warning:
This site, for some reason, uses the same ids over and over again per order, but as this is not my site, I can not change that.

code of my current orderlist:

<div id=orderlist>

<label id=l61>05/19/2014 08:57:34</label>

<label id=l62>0.00066000</label>

<label id=l63>Buy</label>

<label id=l64>6</label>

<label id=l64>6</label>

<label id=l62>0.00396000</label>

<label id=l65 onclick=cancelOrder(346046);>Cancel</label>

<div id=b1></div>

<label id=l61>05/19/2014 03:08:35</label>

<label id=l62>0.00078000</label>

<label id=l63>Sell</label>

<label id=l64>2</label>

<label id=l64>1</label>

<label id=l62>0.00078000</label>

<label id=l65 onclick=cancelOrder(38493);>Cancel</label>

<div id=b1></div>

<label id=l61>05/19/2014 03:12:08</label>

<label id=l62>0.00076000</label>

<label id=l63>Sell</label>

<label id=l64>14</label>

<label id=l64>14</label>

<label id=l62>0.01064000</label>

<label id=l65 onclick=cancelOrder(38495);>Cancel</label>

<div id=b1></div>

<label id=l61>05/19/2014 03:13:49</label>

<label id=l62>0.00077000</label>

<label id=l63>Sell</label>

<label id=l64>15</label>

<label id=l64>15</label>

<label id=l62>0.01155000</label>

<label id=l65 onclick=cancelOrder(38497);>Cancel</label>

<div id=b1></div> </div>

</div>

What I'd need to do basically, is count the number of ids l65. Or another id, it doesn't matter, they are all used each time a new order is added.

What would be the easiest way to do this? I'd need this number in a var, so that I can perform functions based on that number.

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jameson

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answered 10 Years ago mitchell · Accepted Answer

Simplest trick :

   $(label[id^=l65]).length  // will directly give you the count

Traditional :

 $(label).each(function() {

       var totalId = countId(this.id);

       console.log(this.id +  : +totalId); // this will alert l65 : count of 165

    });

Reusable function: pass id which is 165

function countId(id) {

   var counter = 0;

   $(label).each(function() {

     if(this.id==id) {

        counter+=1;

      } 

   });

}