Disable Select Option if already selected

Question

I have created a table which clones its last row if all the text boxes are filled and select is changed in the previous row. I am trying to add a condition that the newly dropdown options should be disabled if they were already selected in previous rows .

Demo Fillde

disable option code:

$('select').change(function() {

    var value = $(this).val();

    $(this).siblings('select').children('option').each(function() {
        if ( $(this).val() === value ) {
            $(this).attr('disabled', true).siblings().removeAttr('disabled');   
        }
    });

});

Full JS:

$('#results').append('<table width="100%" border="1" cellspacing="0" cellpadding="5" id="productanddates" class="border"> <tr><td> <input type="text" name="to1" id="to1" value="" /> </td> <td> <select class="dd" name="Phonenumberdd1" id="Phonenumberdd1"> <option value="test">test </option><option value="test2">test 2</option></select></td> <td>   <input type="text" name="renewal_by1" id="renewal_by1" />  </td>   <td> <input type="text" name="Renivaul_to1" id="Renivaul_to1" value="" /> </td></TR></TABLE>'
);
$('select').change(function() {

    var value = $(this).val();

    $(this).siblings('select').children('option').each(function() {
        if ( $(this).val() === value ) {
            $(this).attr('disabled', true).siblings().removeAttr('disabled');   
        }
    });

});
    $('#results').on('focus', ':input', function() {
        $(this).closest('tr').filter(function() { 
            return !$(this).data('saved'); 
        })
        .find(':input').each(function() {
            $(this).data('value', this.value);
            $(this).closest('tr').data('saved', true);
        });
    })
    .on('input change', ':input', function() {
        $(this).data('filled', this.value != $(this).data('value'))
        var tr  = $(this).closest('tr');
            all = tr.find(':input'),
            fld = all.filter(function() {
                return $(this).data('filled');
            });
        if( all.length == fld.length ) {
            if( !tr.data('done') ) {
                $('#buttonclck')[0].click();
                tr.data('done', true);
            }
        } else {
            if( tr.data('done') ) {

                tr.data('done', false);
            }
        }
    });

    $('#buttonclck').on('click', function () {
        var lastRow = $('#productanddates').closest('#productanddates').find("tr:last-child");
        var lastRowInputs = lastRow.find('input');
        var isClone = false;
        lastRowInputs.each(function() {
           if($(this).val().length) {
               isClone = true;
           }
        });
        if(!isClone)
            return false;
        var cloned = lastRow.clone();
        cloned.find('input, select').each(function () {
            var id = $(this).attr('id');

            var regIdMatch = /^(.+)(\d+)$/;
            var aIdParts = id.match(regIdMatch);
            var newId = aIdParts[1] + (parseInt(aIdParts[2], 10) + 1);

            $(this).attr('id', newId);
            $(this).attr('name', newId);
        });

        cloned.find("input[type='text']").val('');
        cloned.insertAfter(lastRow);
    });

HTML:

<div id="results"></div>

<input id="buttonclck" type="button" class="hide"  value="button"/>

Answer 1

Your mistake was here:

$(this).siblings('select').children('option').each(function() { ... }

It should be :

$(this).children('option').each(function() { ... }   

Why do you select siblings of the select element? You should directly descend to its options. I do not know if it is intended, but such code will make option disabled in both rows: previous and newly generated.

Here is the fiddle:

http://jsfiddle.net/99pvwypp/19/