jquery - Select specific radio buttons in all groups with no selected checkboxes -

i need to:

1. get radio groups no option selected
2. from groups inputs "data-correctanswer"

is there better way of doing 1 have? (it's working)

jsfiddle

(need select a , h only)

html:

<form class="multiform truefalse">     <ul>         <li>             <input data-correctanswer="correct" name="question1" type="radio"><span>a</span>          </li>         <li>             <input name="question1" type="radio"><span>b</span>          </li>     </ul>     <ul>         <li>             <input name="question2" type="radio" checked="checked"><span>c</span>          </li>         <li>             <input data-correctanswer="correct" name="question2" type="radio"><span>d</span>          </li>     </ul>     <ul>         <li>             <input name="question3" type="radio"><span>e</span>          </li>         <li>             <input data-correctanswer="correct" name="question3" type="radio" checked="checked"><span>f</span>          </li>     </ul>     <ul>         <li>             <input name="question4" type="radio"><span>g</span>          </li>         <li>             <input data-correctanswer="correct" name="question4" type="radio"><span>h</span>          </li>     </ul> </form> 

js:

$(document).ready(function () {      var radio_buttons = $('.multiform input[name*="question"]').not(':checked');     var arr = [];     $('.multiform ul').each(function () {         notselectedradiogroup = $(this).find('input[name*="question"]');         if (notselectedradiogroup.filter(':checked').length == 0) {             arr.push($(this));         }     });      $(arr).each(function () {         $(this).find('input:radio[data-correctanswer]').not(':checked').addclass('selected');     }); }); 

try,

    $(document).ready(function () {       var arr = [];       $('.multiform ul').each(function () {         var x = $(":radio", this);         var cond = x.filter(":not(:checked)").length === x.length;         if(cond)          arr.push(x.filter("[data-correctanswer]").data("correctanswer"));                });       alert(json.stringify(arr));     }); 

demo

$(document).ready(function () {     $('.multiform ul').each(function () {         var x = $(":radio", this);         var cond = x.filter(":not(:checked)").length === x.length;         if (cond)           x.filter("[data-correctanswer]").closest("li").css("color","red");     });      }); 

demo ii