Field values not updating immediately, custom calculation script.

Question

I have two fields from which I am trying capture the (numeric) values from. They are named BS BEFORE.x and CARBS.x, with x being a value between 0 and 5, depending upon which record number of the current event. In this code snippet I am merely placing the values into a text field named TEST just for display purposes. Ultimately, these values will be used to calculate a recommend dose of fast acting insulin. The problem is, TEXT.value only updates with the value entered into BS BEFORE.x and CARBS.x AFTER the next entry is made.

HERE IS THE CODE:

// THIS IS A TEST FIELD TO SHOW RESULTS

var TEST = this.getField("TEST"); TEST.value = "";

// CAPTURE RECORD NUMBER FROM THE FIELD NAME AND TRIM BLANKS

var RecordNo = event.target.name.substring(event.target.name.length-1);

RecordNo = RecordNo.trim(RecordNo);

// GET THE VALUE OF CURRENT BS AND CARB FIELDS

var myBS= this.getField("BS BEFORE." + RecordNo);

var myCarbs = this.getField("CARBS." + RecordNo);

// SHOW TEST VALUES

TEST.value = myBS.value + " : " + myCarbs.value;

Incidentally, is there a way to do this using calculation without calculating everything in the form?

Message was edited by: Malcolm Thomson - Removing unnecessary caps in title.

try67 · Accepted Answer

I have a couple of issues. I am still having the calculation updating issue AND my end value is a truncated string and NOT a mathematical value. Please see the image attached.

The toFixed method returns a string. When you combine a string to a number you get a string...

Test Screen Name · Answer

If this is a real application, rather than a student project, I'm sure you know better than me that lives depend on the right answer. While I'd hesitantly accept using Acrobat to calculate my tax, I'm not sure I'd want any lives to depend on it (and your code) working right, even if you test it a hundred or a thousand times. I would not want this job, and I've been a software developer for many decades. I'd recommend that if this is to be directly used by any patient, carer or healthcare professional that you have it fully validated by someone familiar with the subject areas, methodology, making provably correct software, and your development tools; and willing to be professionally liable for their judgement.

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