// 9.8 Genetic Algorithm -- Improved Pool Selection

​

const fruits = [

  { name: 'mango', score: 5 },

  { name: 'blueberry', score: 3 },

  { name: 'cherry', score: 1 },

  { name: 'melon', score: 7 },

  { name: 'apple', score: 1 }

];

​

function setup() {

  createCanvas(400, 300);

  background(0);

  let sum = 0;

  for (let i = 0; i < fruits.length; i++) {

    sum += fruits[i].score;

  }

  for (let i = 0; i < fruits.length; i++) {

    fruits[i].prob = fruits[i].score / sum;

    fruits[i].count = 0;

  }

​

  let melonCount = 0;

  for (let i = 0; i < 100000; i++) {

    let fruit = pickOne(fruits);

    fruit.count++;

  }

  //console.log(fruits);

}

​

function pickOne(list) {

  let index = 0;

  let r = random(1);

​

  while (r > 0) {

    r = r - list[index].prob;

    index++;

  }

  index--;

  return list[index];

}