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

const pAequorFactory = (number, dnaArray) => {
  return {
    specimenNum: number,
    dna: dnaArray,
    mutate() {
      for (let base in this.dna) {
        let mutatedBase = returnRandBase();
        while (dnaArray[base] === mutatedBase) mutatedBase = returnRandBase();
        dnaArray[base] = mutatedBase;
      }
      return this.dna;
    },
    compareDNA(pAequor) {
      let dnaMatch = 0;
      for (let i = 0; i < this.dna.length; i++){
        if (this.dna[i] === pAequor.dna[i]) dnaMatch++;
      }
      const matchPercent = (dnaMatch / this.dna.length) * 100;
      console.log(`Specimen #${pAequor.specimenNum} and Specimen #${this.specimenNum} have ${matchPercent}% DNA in common.`);
    },
    willLikelySurvive() {
      let countCG = 0;
      for (let i = 0; i < this.dna.length; i++) {
        if (this.dna[i] === "C" || this.dna[i] === "G") countCG++;
      }
      const surviveRate = Math.ceil(this.dna.length * 0.60);  
      if (countCG >= surviveRate ) return true;
      else return false
    }
  }
};

const instances = [];
for (let i = 0; i < 30; i++) {
  let sample = pAequorFactory(i, mockUpStrand());
  if (sample.willLikelySurvive()) instances.push(sample);
} 



console.log(instances);
const test = pAequorFactory(4, ['C', 'A', 'C', 'T', 'G', 'T']);
const test1 = pAequorFactory(6, ['A', 'T', 'G', 'G']);
test.compareDNA(test1);
console.log(test.willLikelySurvive());