I have 60+ checkboxes all with unique names, how can I get a count of how many are checked?

Question

The checkboxes are named 1a, 1b, 1c, 2a, 2b, 2c, etc.. up to 27a, 27b... I could add the word "bed" to the beginning of each name if it helps.
I want to create a text field that will update the count every time a box is checked or unchecked.
Thanks

Answer 1

It would be better to add "bed." instead, so that the field names are "bed.1a", "bed.1b", ..."bed.27b". You can then easily get an array of all of the "bed" fields, check each one, and increment a counter. The custom calculate script for the text field could be something like:
// Custom calculate script
(function () {
    // Get an array of the bed fields
    var fa = getField("bed").getArray();
    // Initialize counter
    var sum = 0;
    // Loop through the fields and update counter
    for (var i = 0; i < fa.length; i += 1) {
        sum += fa[i].value !== "Off" ? 1 : 0;
    // Set this field's value to the sum
    event.value = sum;