Codecademy export

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 strand of DNA containing 15 bases
const mockUpStrand = () => {
  const newStrand = [];
  for (let i = 0; i < 15; i++) {
    newStrand.push(returnRandBase());
  }
  return newStrand;
}

// Putting survival P Aequors into an array to study them later
const survivalAequors = aequorArrayObjects => {
  let pAequorSurvivals = [];
  aequorArrayObjects.forEach(aequorObject => {
    aequorObject.willLikelySurvive() ? pAequorSurvivals.push(aequorObject.dna) : `\n Will this P. Aequor survive?: ${false} \n ${aequorObject.dna}`;
  })
  return pAequorSurvivals;
}

// Factory function
const pAequorFactory = (number, dnaBases) => {
  return {
    specimenNum: number,
    dna: dnaBases,
    mutate() {
      let chosenIndex = Math.floor(Math.random() * 4);
      let baseToMutate = this.dna[chosenIndex];
      for (const base of this.dna) {
        if (base !== baseToMutate) {
          baseToMutate = base;
          break;
        }
      }
      this.dna[chosenIndex] = baseToMutate;
      return this.dna;
    },
    compareDNA(pAequorNumber, pAequorObject) {
      let baseCounter = 0;
      let indexCounter = -1;
      this.dna.forEach(element => {
        indexCounter++;
        if(element === pAequorObject[indexCounter]) {
          baseCounter++;
        }
      })
      const dnaPercentageInCommon = ((baseCounter / this.dna.length) * 100).toFixed()
      return `Specimen #${this.specimenNum} and Specimen #${pAequorNumber} have ${dnaPercentageInCommon}% DNA in common`;
    },
    willLikelySurvive() {
      let survivalCounter = 0;
      this.dna.forEach(element => {
        if(element === 'C' || element === 'G') {
          survivalCounter++;
        }
      })
      const survivalProbability = ((survivalCounter / this.dna.length) * 100).toFixed()
      return survivalProbability >= 60 ? true : false;
    }
  }
}

let dnaArray = mockUpStrand();
let dnaTwoArray = mockUpStrand();
let dnaThreeArray = mockUpStrand();
let dnaFourArray = mockUpStrand();
let dnaFiveArray = mockUpStrand();
let pAequorCompare = mockUpStrand();


let firstAequorDna = pAequorFactory(1, dnaArray);
let secondAequorDna = pAequorFactory(2, dnaTwoArray);
let thirdAequorDna = pAequorFactory(3, dnaThreeArray);
let fourAequorDna = pAequorFactory(4, dnaFourArray);
let fiveAequorDna = pAequorFactory(5, dnaFiveArray);
firstAequorDna.mutate();

console.log(firstAequorDna.compareDNA(2, pAequorCompare));
console.log(`${dnaArray}`);
console.log(`${pAequorCompare} \n`);


const aequorsArray = [firstAequorDna, secondAequorDna, thirdAequorDna, fourAequorDna, fiveAequorDna]
console.log(survivalAequors(aequorsArray));