Script variables fail to update dynamically

[RoarkCats]

Issue type:

• 🐛 Bug

---

Short description:

Script references fail to update until removed and re-added to the system manually or using automation

Steps to reproduce the problem:

Simple example:

let x = 0;
function test() {return ++x;}

A variable card is referencing the test function, another applies it and is placed within the redstone writer and display panel. While I'm not sure of the display panel's refresh rate, the redstone writer should be updating once a tick, yet the number only increases when the variable is removed and placed back (and skipping multiple times at that!). It does also update when a cable is added to the system, however, as I'm using transient storage it also resets x to 0 (expected)

Complex Example:

let p_buttons = Array(12).fill(false);
let code = Array(6).fill(0);
let out = false;

function code_out(buttons) {
// check button updates
 for (let i=0; i<12; i++) {
  const b = buttons[i];
  if (!p_buttons[i] && b) {
   button(i);  
  }
 }
 p_buttons = buttons
 return out;
}

let ofs = 0;
function button(i) {
// handle button pressed
 let pos = code.indexOf(0); 
 if (i===11) {verify();}
 if (i===10) {
  if (pos>0) {code[pos-1] = 0;}
  else {code[5] = 0; ofs = 0;}
 }
 if (i<=9) {
  if (pos===-1) {pos=ofs++;}
  code[pos] = i+1;
 }
}

function verify() {
// verify code entered
 out = ''+code === '10,1,2,3,4,5';
 code = Array(6).fill(0);
}

function get_code() {
 return code;
}

I'll refrain from getting into the details here, but the gist is that code_out(buttons) is run every tick by a redstone writer, taking input from a number of redstone readers, this works fine, it also updates the code transient variable as it runs, however, when I then make a variable card referencing code directly or the get_code() function and apply it, it fails to update when placed in a display, delayor, proxy, or used otherwise for ouput (such as getting individual numbers from the list and redstone writing them)

I have found a work-around for myself for this issue, by proxying the variable to be used for output and to be passed in and out of a size 1 delayer via automation (hopper upgrade barrel) as the act of adding and removing it from a machine/display/writer seems to update the reference/output

Expected behaviour:

Variables update dynamically like they do everywhere else

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Versions:

• ID: 1.27.3
• Scripting: 1.0.14
• Minecraft: 1.20.1
• Mod loader version: Forge 47.4.0

[rubensworks]

Thanks for reporting!

[rubensworks]

This is actually working as intended.

Values will be calculated in a lazy manner for performance reasons.
So if none of the inputs change, the output will not be recalculated.

Workarounds are possible for this of course as you discovered. Some clock value as input to the applied function should also work.