$ is not a function jQuery

$ is not a function jQuery

If you are trying to add your own jQuery code to WordPress
and seeing an error “$ is not a function” in Firebug,

If you code is looking like this:

$(document).ready(function(){
    $("#list").dataTable({
    "bJQueryUI": true,
    "sPaginationType": "full_numbers"
    });
});

Then you need to change all '$' sign to jQuery.
Then add line

jquery.noConflict();

before your normal code

jQuery.noConflict();
jQuery(document).ready(function() {
jQuery('#list').dataTable({
"bJQueryUI": true,
"sPaginationType": "full_numbers",
});
});

Here you can find the complete documentation about jquery.noConflict();