jQuery inArray is always returning -1

Question

I cannot figure out why I keep getting -1 for lastProductIndex when clearly the lastProductID is in the array!

var lastProductID = 6758;
var allProductIDs =          


        

Answer 1

Are you using any other JavaScript libraries in your page?

There could be a conflict for the $ shorthand if you are. This can be solved in a number of ways, one of which would be wrapping the code in a self-executing anonymous function

(function($) {
    var lastProductIndex = $.inArray(lastProductID, allProductIDs);
})(jQuery);