Codecademy export

main.js

//Follow me on GitHub: https://github.com/khoiuna

// 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;
};

const pAequorFactory = (num, array) => {
  let obj = {
    specimenNum: num,
    dna: array,
    //
    mutate() {
      while(this.dna[Math.floor(Math.random() * this.dna.length)] === this.dna[Math.floor(Math.random() * this.dna.length)]) {
        this.dna[Math.floor(Math.random() * this.dna.length)] = returnRandBase();
      }
      return this.dna;
    },
    //
    compareDNA(pAequor) {
      let count = 0;
      for(let i in this.dna) {
        if(this.dna[i] === pAequor[i]) count++;
      }
      console.log(`specimen #1 and specimen #2 have ${count / this.dna.length * 100} DNA in common`);
    },
    //
    willLikelySurvive() {
      let count = 0;
      this.dna.forEach(el => {
        if(el === 'C' || el === 'G') count++;        
      })
      return count / this.dna.length >= .6;
    }
  };
  //
  return obj;
};

let pAequorArr = [];
for(let i = 1; i < 31; i++) {
  if(!pAequorFactory(i, mockUpStrand()).willLikelySurvive()) continue;
  pAequorArr.push(pAequorFactory(i, mockUpStrand()))
}

console.log(pAequorArr);