Compare two values per row on multiple rows

Question

I am stuck with the each function. Could someone please help me getting on the right track? Here is my code so far and an image to visualize what I am trying to achieve.

Image

Thank you very much!

    $('.ui-button').on('mouseenter', function () { // just for testing

        var c = 1; // skip first row

        var eventdate = $('.ui-sortable tr:nth-child(2) > td:nth-child(1) .InputfieldDatetimeDatepicker').attr('value');
        var eventtime = $('.ui-sortable tr:nth-child(2) > td:nth-child(2) .uk-select option:selected').text();


        $('.ui-sortable tr').each(function () {
            c++;

            var eventdate = $('.ui-sortable tr:nth-child(' + [c] + ') > td:nth-child(1) .InputfieldDatetimeDatepicker').attr('value');
            var eventtime = $('.ui-sortable tr:nth-child(' + [c] + ') > td:nth-child(2) .uk-select option:selected').text();

            if (eventdate === eventtime) { // ?
                $(this).addClass('error');
            }

            console.log('eventdate: ' + eventdate + ', eventtime: ' + eventtime);

        });


    });

Answer 1

Fiddle code: When something is changed, then it is checked all rows!

    $(function () {
  
    $('.ui-sortable tr').on('change', function (e) {
    
    $('.ui-sortable tr').each((i, tr)=>{
        $(tr).attr('no', i);
      $(tr).attr('class', '');
    });
    
    $('.ui-sortable tr').each((i, tr)=>{
    
        let foundDuplicates = false;
        let no = $(tr).attr('no');
      let date = $(tr).children('td:nth-child(1)').children('input').val();
      let time = $(tr).children('td:nth-child(2)').children('select').val();
    
      $('.ui-sortable tr').each((i, tr_)=>{
      
        let no_ = $(tr_).attr('no');
        if(no === no_) return false;
        
        let date_ = $(tr_).children('td:nth-child(1)').children('input').val();
        let time_ = $(tr_).children('td:nth-child(2)').children('select').val();
        if((date === date_) && (time === time_)){
          $(tr).attr('class', 'error');
          $(tr_).attr('class', 'error');
          foundDuplicates = true;
        }
      });
      
      if(foundDuplicates){
        $(tr).attr('class', 'error');
      }
      
    });
    
  });
        
});