var cseB = ['Leandro', 'Dylan', 'Hugo', 'Bosco', 'Ana'];

​

// --- Last Pairs

​

var activity1 = [

  ['Sarah', 'Bosco'],

  ['Jake', 'Ana'],

  ['Ka Hou', 'Dylan'],

  ['Michael', 'Hugo'],

  ['Kenny', 'Leandro'],

];

​

var activity2 = [

  ['Sarah', 'Dylan'],

  ['Jake', 'Bosco'],

  ['Ka Hou', 'Ana'],

  ['Michael', 'Leandro'],

  ['Kenny', 'Hugo'],

];

​

// ---------------

​

var button;

var lineHeight = 45;

var randomized = false;

​

function setup() {

  createCanvas(400, 400);

  button = createButton('Randomize');

  button.position((width/2)-50, 20);

  button.mousePressed(randomize);

}

​

function draw() {

  background(174, 224, 132);

  // Draw a header

  textSize(18);

  textStyle(BOLD);

  text("CSE-A", 80, 90);

  text("CSE-B", 240, 90);

  line(80, 100, 310, 100);

  // List the names

  if (randomized) {

    textStyle(NORMAL);

    for (var i = 0; i < cseA.length; i++) {

      text(cseA[i], 80, 140 + (i * lineHeight));

      text('⇄', 185, 140 + (i * lineHeight));

      text(cseB[i], 240, 140 + (i * lineHeight));

    }

  }

}

​

function randomize()

{

  cseA = shuffle(cseA);

  cseB = shuffle(cseB);

  // Prevent the same groups as last time

  var alreadyDone = false;

  for (var i = 0; i < cseA.length; i++) {

    for (var k = 0; k < activity1.length; k++) {

      if (cseA[i] == activity1[k][0] && cseB[i] == activity1[k][1]) {

        alreadyDone = true;

      }

    }

  }

  if (alreadyDone) {

    randomize();  

  }

  randomized = true;

}