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
}


function pAequorFactory(number, arrayOfDNA){
  return {
    _specimenNum: number,
    _dna: arrayOfDNA,
    get specimenNum(){
      return this._specimenNum
    },
    set specimenNum(num){
      this._specimenNum = num;
    },
    get dna(){
      return this._dna
    },
    set dna(newDNA){
      this._dna = newDNA;
    },
    
    mutate() {
      const pickedIdx = Math.floor(Math.random() * 15);
      const pickedDNA = this.dna[pickedIdx];

      let mutatedDNA = returnRandBase();
      while (mutatedDNA === pickedDNA) {
        // console.log(pickedIdx);
        // console.log(pickedDNA, mutatedDNA);
        mutatedDNA = returnRandBase();
      }
      // console.log(pickedIdx);
      // console.log(pickedDNA, mutatedDNA);
      // console.log(this.dna);
      this.dna[pickedIdx] = mutatedDNA;
      // console.log(this.dna);
      return this.dna;
    },
    compareDNA(pAequor){

      let commonDNACnt = 0;
      for (let i = 0; i < this.dna.length; i ++){
        if (this.dna[i] === pAequor.dna[i]) {
          commonDNACnt += 1;
        }
      }
      const pctDNAInCommon = Math.round(commonDNACnt / 15 * 100);
      const message = `specimen #${this.specimenNum} and specimen #${pAequor.specimenNum} have ${pctDNAInCommon}% DNA in common`;
      console.log(message);
    },
    willLikelySurvive(){
      let countOfCG = 0;
      for (let i = 0; i < this.dna.length; i++){
        if (['C', 'G'].includes(this.dna[i])){
          countOfCG ++;
        }
      }
      const pctCG = countOfCG / this.dna.length;
      // console.log(pctCG)
      return pctCG >= 0.6;
    },
    complementStrand(){
      const complementDNAMapper = {
        A: 'T',
        T: 'A',
        C: 'G',
        G: 'C'
      }
      const complement = this.dna.map(e => {return complementDNAMapper[e]});
      return complement;
    }
  }
}

// console.log(mockUpStrand());

// const pAequor1 = pAequorFactory(1, mockUpStrand());
// const pAequor2 = pAequorFactory(2, mockUpStrand());

// pAequor1.compareDNA(pAequor2);
// console.log(pAequor1.willLikelySurvive());
const pAequorArray = [];
const numSamplesWeNeed = 3;

for (let i = 0; i < numSamplesWeNeed; i ++){
  let newpAequor = pAequorFactory(i, mockUpStrand());
  // while (!newpAequor.willLikelySurvive()){
  //   let newpAequor = pAequorFactory(i, mockUpStrand());
  // }
  pAequorArray.push(newpAequor);
};

// console.log(pAequorArray);
console.log(pAequorArray[0].dna);
console.log(pAequorArray[0].complementStrand());
// console.log(pAequor1.mutate());