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
}
//object factory
const pAequorFactory = (specimenNum, dna) => {
  console.log(dna)
  return  {
    specimenNum : specimenNum,
    dna : dna,
// mutate method to change a base
    mutate() {
      const dnaBases = ['A', 'T', 'C', 'G']
      let rand = this.dna[Math.floor(Math.random()*15)] ;
      let base = dnaBases[Math.floor(Math.random() * 4)];
        if ( rand === base) {
          return 'No mutation';
        }else {
          dna.splice(dna.indexOf(rand),1, base);
          return dna;
        }
      },
  // method to compare the mutated dna with another dna passed in
      compareDNA(obj) {
        let counter = 0;
        for(let i = 0; i<dna.length; i++){
            if(dna[i]===obj.dna[i]){
              counter++;
              console.log(counter);
            }
          }
           const percentage = (counter/dna.length)*100;
          console.log(`The correlation between specimen number ${this.specimenNum} and ${obj.specimenNum} showed a ${percentage}% match.`);
        },
//check the viability of samples with 60% C and G as the baseline
      willLikelySurvive() {
        let counter = 0;
        for (let i =0; i<this.dna.length; i++){
        if (this.dna[i]==='C' || this.dna[i] === 'G'){
          counter++;
        }
        }
      let percentage= (counter/this.dna.length)*100;
      if(percentage>=60){
        return true;
      }else{
        return false;
      }
      }

      }
    }
   
let specimenNumber=1;
const ae = pAequorFactory(specimenNumber, mockUpStrand())
//console.log(ae.mutate());
//ae.compareDNA(pAequorFactory(2, mockUpStrand()));

//console.log(ae.willLikelySurvive());

// 30 instances of viable samples
const sampleBatch = () => {
const batch = [];

while(batch.length <=30){
  pAequorFactory(specimenNumber, mockUpStrand());
  if(ae.willLikelySurvive()){
    batch.push(ae);
  }
  specimenNumber++;
}
return batch;
}


console.log(sampleBatch());