main.js

// Returns a random DNA base
const returnRandBase = () => {
  const dnaBases = ["A", "T", "C", "G"];
  return dnaBases[Math.floor(Math.random() * 4)];
};

// Returns a random single stand of DNA containing 15 bases
const mockUpStrand = () => {
  const newStrand = [];
  for (let i = 0; i < 15; i++) {
    newStrand.push(returnRandBase());
  }
  return newStrand;
};

function pAequorFactory(number, array) {
  return {
    specimenNum: number,
    dna: array,
    mutate() {
      let i = 0;
      for (let i = 0; i < array.length; ) {
        let temp = array[i];
        array[i] = returnRandBase();
        if (array[i] !== temp) {
          i++;
        }
      }
    },
    compareDNA(pAequor) {
      let sum = 0;
      for (let i = 0; i < array.length; i++) {
        if (array[i] === pAequor.dna[i]) {
          sum++;
        }
      }
      return `specimen #1 and specimen #2 have ${
        (sum * 100) / 15
      }% DNA in common`;
    },
    willLikelySurvive() {
      let sum = 0;
      for (let i = 0; i < array.length; i++) {
        if (array[i] === "C" || array[i] === "G") {
          sum++;
          console.log(sum);
        }
      }
      if (sum > 8) {
        return true;
      } else {
        return false;
      }
    },
  };
}

let theFirstOne = pAequorFactory(1, mockUpStrand());
let theFirstSecond = pAequorFactory(2, mockUpStrand());
console.log(theFirstOne);
theFirstOne.mutate();
console.log(theFirstOne);
console.log(theFirstSecond.compareDNA(theFirstOne));
console.log(theFirstOne.willLikelySurvive());

const obj = {
  name: "Dawid",
};

let arrayWithpAequor = [];
for (let i = 0; arrayWithpAequor.length < 30; i++) {
  let temp;
  temp = pAequorFactory(i, mockUpStrand());
  if (temp.willLikelySurvive()) {
    arrayWithpAequor.push(temp);
  }
}

console.log(arrayWithpAequor);