How do I properly replace identifiers with variables in jQuery

Question

I guess I am to stupid to get this to work.

I have a shoppingcart which can be splitted in multiple carts, if someone buys items from different sellers. So I create for every seller his own form and table, which IDs are extended by $sellerId. Next step is to count how much elements with class 'delete16' are in the given table, for example with id="cartTable_815".

I can get this to work if I code this:

var n = $("#cartTable_815 div[class=delete16]").length;

But if I want to write myself a function to count the elements with class 'delete16' within a variable table-id I tried this:

    $("#cartInner div[class=delete16]").click(function(){
    var id = this.id;
    removeItem(id);
    });

    function removeItem(id)
    {
       var identifiers = id.split("_"); 
       var cartId = identifiers[1];
       var itemId = identifiers[2];
       var tab = "cartTable_" + cartId;
       var n = $("#cartTable_815 div[class=delete16]").length;
       alert(n);
    }

If I replace #cartTable_815 with tab it does not work.

var n = $("#cartTable_" + tab + "div[class=delete16]").length;

Hope someone can explain me how I have to do this the right way.

Thanks for your time and reading

you are missing a space var n = $("#cartTable_" + tab + " div[class=delete16]").length; — Arun P Johny
– Arun P Johny, Commented Aug 31, 2013 at 17:42

Ionică Bizău · Accepted Answer · 2013-08-31 17:42:00Z

1

Because tab already contains a number, it probably has the value cartTable_815. So, you should be able to do:

var n = $("#" + tab + " div[class=delete16]").length;

And the selector will be:

// "#" + tab  +  " div[class=delete16]"
   "#cartTable_815 div[class=delete16]"

answered Aug 31, 2013 at 17:42

Ionică Bizău

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2 Comments

Thomas Tonius Over a year ago

Oh my god... of course. I should go to bed now... thanks a lot!

Thomas Tonius Over a year ago

I'll do so - still have to wait 2 minutes :-) Kind regards from Spain

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