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 = (SerialNum, standDna) => {
  return ({
    specimenNum: SerialNum,
    dna: standDna,
    mutate(i){
      let as = returnRandBase();
      while (this.dna[i] == as) {
        as = returnRandBase();
      }
      this.dna[i] = as;
    },
    compareDNA(obj) {
      const specimenOne =this.dna;
      const specimenTwo =obj.dna;
      let coinc = 0;
      for (let i=0; i < 15; i++) {
        if(specimenOne[i] == specimenTwo[i]) {
          coinc ++;
        }
      }
      console.log('specimen #' + this.specimenNum +' and specimen #' + 
                  obj.specimenNum +' have ' + coinc/15*100 + '% DNA in common')
    },
    willLikelySurvive() {
      let counter = 0;
      for (let i=0; i < 15; i++) {
        if(this.dna[i] == 'C' || this.dna[i] == 'G') {
          counter ++;
        }
      }
      let survive = counter/15*100;
      if (survive >= 60) {
        return true;
      } else {return false};
    }
  })
}

let dnaStore = () => {
  let store = [];
  for (let i=1; i < 31; i++) {
    store.push(pAequorFactory(i, mockUpStrand()))
  }
  return store;
}

let paequorStore = dnaStore()