An example of bad code to count the number of matching elements on a page.

jquery_bad_counting_matching_elements.js

function countFlaggedQs(){
    var fgC = 0,
        fgT = ' flagged questions';
    $(".q-flag").each(function(){
        if( $(this).children(".icon-flag").length ) {
          fgC++;
        }
    });
    fgT = (fgC === 1) ? ' flagged question' : ' flagged questions';
    $("#q_fg").html( fgC+' <i class="icon-flag" title="'+fgC+fgT+'"></i>' );
}