Jquery Read Array of Select Dropdowns in Numbered Group

Question

I have an array of select dropdowns as such:

<select name="item[1]">
    <option value="No">No</option>
    <option value="Yes">Yes</option>
</select>
<select name="item[2]">
    <option value="No">No</option>
    <option value="Yes">Yes</option>
</select>
<select name="item[3]">
    <option value="No">No</option>
    <option value="Yes">Yes</option>
</select>
<select name="item[4]">
    <option value="No">No</option>
    <option value="Yes">Yes</option>
</select>

I am trying to parse through them using Jquery. The number in the name is populated by the ID number of the item in my database. I basically want to parse through each one, if it is a yes, then use the ID to get the price of the item from the database to calculate a total. Is this even possible with Jquery? I can do the rest of the code no problem, I just need help with parsing through all of the item and return the value and ID for each one.

$("select").each(function() { if (this.value == "Yes") //do stuff }) — tymeJV
– tymeJV, Commented Apr 6, 2015 at 17:30

Dave · Accepted Answer · 2015-04-06 17:38:41Z

I'd use the jQuery attribute starts with selector, and combine with .map() to get the list of your selected items.

Here's a runnable snippet that returns an array of selected items after clicking the button. It's up to you to take the item ids and generate your price.

$("button").on("click", function() {
  var ids = $('select[name^="item"]').map(function() {
    if ($(this).val() === "Yes")
      return this.name.replace(/\D/g,'');
    else 
      return null;
  }).toArray();
  
  alert(ids);
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<select name="item[1]">
    <option value="No">No</option>
    <option value="Yes">Yes</option>
</select>
<select name="item[2]">
    <option value="No">No</option>
    <option value="Yes">Yes</option>
</select>
<select name="item[3]">
    <option value="No">No</option>
    <option value="Yes">Yes</option>
</select>
<select name="item[4]">
    <option value="No">No</option>
    <option value="Yes">Yes</option>
</select>
<button>Get Price</button>

Gabriele Petrioli · Accepted Answer · 2015-04-06 17:35:41Z

Here is a full example (the getIds method is the part you want)

function getIds(){
  var selected = $('select[name^="item["]').filter(function(){
    return this.value == 'Yes';
  }).map(function(){
    return this.name.match(/\d+/);
  });
  return selected.get();
}

// just for display purposes
// you should call the getIds() method when you need to..
$('select').change(function(){
  var ids = getIds();
  $('.results').text( ids );
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<select name="item[1]">
    <option value="No">No</option>
    <option value="Yes">Yes</option>
</select>
<select name="item[2]">
    <option value="No">No</option>
    <option value="Yes">Yes</option>
</select>
<select name="item[3]">
    <option value="No">No</option>
    <option value="Yes">Yes</option>
</select>
<select name="item[4]">
    <option value="No">No</option>
    <option value="Yes">Yes</option>
</select>

<div class="results"></div>

IronFlare · Accepted Answer · 2015-04-06 17:34:20Z

0

I haven't tested it, but you could try something like this:

$("select[name^='item']").each(function(){
console.log($(this).attr("name") + ": " + $(this).find(":selected").attr("value"));
});

With a slight tweak, you could turn that into key value pairs, and then, if I understand the question correctly, potentially use eval() to get the desired value.

answered Apr 6, 2015 at 17:34

IronFlare

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