It seems to me like you should associate the array IDs with the link's IDs
jQuery("a.event_delete").each( function(index, value){
jQuery(this).attr('id', event_id[index]);
console.log(this);
});
jQuery('.event_delete').click(function(){
var index = jQuery('.event_delete').index(this);
console.log(jQuery(this).attr('id'));
});
But you could just have the IDs in the HTML originally, unless you are getting them from another source later.