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
}

//factory function to create a specimen
const pAequorFactory = (specimenNum, dna) => {
  return {
    specimenNum,
    dna,
    mutate() {
      const randNum = Math.floor(Math.random()*this.dna.length);
      let giveNewBase = letter => {
        let newBase;
         do {
              newBase = returnRandBase();
              //console.log(newBase);
           } while (newBase === letter);
           //console.log(letter, newBase);
           return newBase;
          }; 
      this.dna[randNum] = giveNewBase(this.dna[randNum]);
    },
    compareDNA(anotherObj) {
      let haveInCommon = 0;
      for (let i = 0; i < this.dna.length; i++) {
        if (this.dna[i] === anotherObj.dna[i]) {
          haveInCommon += 1;
          //console.log(i, this.dna[i], haveInCommon);
        }
      }
      console.log(`specimen #${this.specimenNum} and specimen #${anotherObj.specimenNum} have ${(haveInCommon/15*100).toFixed()}% DNA in common.`);
      },
    willLikelySurvive() {
      let baseCorG = 0;
      for (let element of this.dna) {
        if (element === 'C' || element === 'G') {
          baseCorG++;
        } 
      }
      //console.log(baseCorG);
      return (baseCorG/15*100).toFixed() > 60;   
    }
  }
}

//test the function factory
//const testObject1 = pAequorFactory(0,mockUpStrand());
//const testObject2 = pAequorFactory(1,mockUpStrand());
//console.log(testObject1);
//testObject.mutate();
//console.log(testObject2);
//testObject1.compareDNA(testObject2);
//console.log(testObject1.willLikelySurvive());

const superpAequor = [];
let i = 0;
while (i < 30) {
  const tryObj = pAequorFactory(i, mockUpStrand());
  if (tryObj.willLikelySurvive()) {
    superpAequor.push(tryObj);
    i++;
  }
}
//console.log(superpAequor);