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;
}

const pAequorFactory = (specNum, strand) => {
  return {
    specimenNum: specNum,
    dna: strand,
    mutate() {
      let index = Math.floor(Math.random() * this.dna.length);
      let newBase = returnRandBase();
      while (newBase === this.dna[index]) {
        newBase = returnRandBase();
      }
      this.dna.splice(index,1,newBase);
      return this.dna;
    },
    compareDNA(aequor2) {
      let sample1 = this.dna;
      let sample2 = aequor2.dna;
      let identicalCount = 0;
      if (sample1.length === sample2.length) {
        for (let x = 0; x < sample1.length; x++) {
          if (sample1[x] === sample2[x]) {
            identicalCount++;
          }
        }
      } else {
        console.log('DNA strands are not equal length. Please check your data.');
      }
      let percentage = (identicalCount/sample1.length) * 100;
      console.log(`Specimen ${this.specimenNum} and specimen ${aequor2.specimenNum} have ${Math.floor(percentage)}% DNA in common.`);
    },
    willLikelySurvive() {
      let cgBases = 0;
      this.dna.forEach(base => {
        if (base === 'C' || base === 'G') {
          cgBases++;
        }
      });
      let survival = (cgBases/this.dna.length) * 100;
      //console.log(survival);
      if (survival >= 60) {
        return true;
      } else {
        return false;
      }
    }
  };
}

const pAequorArray = [];
for (let x=0; x<30; x++) {
  pAequorArray.push(pAequorFactory(x, mockUpStrand()));
}

console.log(pAequorArray.length);

pAequorArray.forEach(organism => {console.log(`Specimen ${organism.specimenNum} : ${organism.dna}`)});