Random number generator avoiding duplicates. - SL3

Aug 16, 2023

I realize SL360 may be easier to complete this project. Alas, I cannot upgrade currently. I do, however, need help with the random number generator I am using to create a set of flash cards. One slide with 50 layers.

I created a variable randum and used the following js to generate a random number and linked it to specific slides with triggers. Altho tedious, that was easy.

var randomnumber = Math.floor((Math.random()*50)+1);
var player = GetPlayer();
player.SetVar("randnum",randomnumber);

(2) Questions:

1. How do I avoid duplicate numbers appearing regularly when I run the app?

2. How do I end the app when all cards have been used.

Any suggestion would be helpful. I am a js newbie.

Jürgen Schoenemeyer

9 months ago08/16/23 at 7:04 pm (UTC)

here is a small example, how it could work

idea

in the storyline variable "max" you can set the number of tries (=> 50)
create a array (list) of number: 1 .. max
on click take a number with a random position out of the array
window.[...] is a global storage, so different local scripts can use global js variables

on timeline start init the array

var player = GetPlayer();
var max = player.GetVar( "max" );

var numbers = [];
for( var i=1; i<=max; i++ ){
  numbers.push(i);
}
window.numbers = numbers;

player.SetVar( "debug", window.numbers.toString() );

on button click

var randomIndex, ready, ret;
var player = GetPlayer();

var currLength = window.numbers.length;
if (currLength === 0){
  GetPlayer().SetVar( "debug", "window.numbers.length empty" );
}
else {
  ready = false;
  if (currLength > 1){
    randomIndex = Math.floor( Math.random() * currLength );
  }
  else {
    randomIndex = 0;
    ready = true;
  }

  ret = window.numbers.splice( randomIndex, 1 );

  player.SetVar( "randnum", ret );
  player.SetVar( "ready", ready );
  player.SetVar( "debug", window.numbers.toString() );
}

https://360.articulate.com/review/content/76c46afa-6543-47f7-8c64-3d040fea47a0/review

random.story

Random number generator avoiding duplicates. - SL3

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