Challenge Project: Mysterious Organism - CodingCyrus

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

// Factory function that returns an object containing the properites specimenNum and dna in addition to mutate() and compareDNA() methods
const pAequorFactory = (specimenNum, dna) => {
  return {
    specimenNum: specimenNum,
    dna: dna,
    mutate() {
      const dnaBases = ['A', 'T', 'C', 'G']
      let bases = Math.floor(Math.random() * 4)
      let base = Math.floor(Math.random() * 15)
      if (dna[base] != dnaBases[bases]) {
        dna[base] = dnaBases[bases]
        return dna;
      } else {
        let index = dnaBases.indexOf(dna[base]);
        dnaBases.splice(index, 1);
        dna[base] = dnaBases[Math.floor(Math.random() * 3)];
        return dna;
      }
    },
    compareDNA(pAequor) {
      let identical = 0;
      for (let i = 0; i < dna.length; i++) {
        if(dna[i] === pAequor.dna[i]) {
          identical++;
        } else {
          continue;
        }
      }
      const percentage = (identical/15) * 100;
      console.log(`specimen #1 and speciment #2 have ${percentage.toFixed(2)}% DNA in common.`); 
    },
    willLikelySurvive() {
      let count = 0;
      for (let i = 0; i < dna.length; i++) {
        if (dna[i] == 'C' || dna[i] == 'G') {
          count++;
        }
      }
      if((count/15)*100 >= 60) {
        return true;
      } else {
        return false;
      }
    }
  }
}

//Array of 30 pAequor instances that can survive in their natural environment
let samples = [];
while (samples.length < 30){
  let obj = pAequorFactory(1, mockUpStrand());
  if (obj.willLikelySurvive()) {
    samples.push(obj);
  } else {
    continue;
  }
}

//Test Cases
// let obj = pAequorFactory(1, mockUpStrand())
// console.log(obj.dna);
// // console.log(obj.mutate())
// let obj2 =pAequorFactory(1, mockUpStrand())
// console.log(obj2.dna);
// obj2.compareDNA(obj);
// console.log(obj2.willLikelySurvive());
// console.log(samples);