Mysterious Organism

mysteriousOrganism.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
};

//Simulate a P. Aequor specimen
function pAequorFactory(num, array) {
  return {
    specimenNum: num,
    dna: array,
    mutate() {
      let i = Math.floor(Math.random() * this.dna.length);
      let original = this.dna[i];
      let bases = ['A', 'T', 'C', 'G'];
      bases.splice(bases.indexOf(original), 1);
      let mutator = bases[Math.floor(Math.random() * 3)];
      return this.dna.splice(i, 1, mutator);
    },
    //Compare DNA strands.
    compareDNA(pAequor) {
      let sameBases = 0;
      let totalBases = this.dna.length + pAequor.dna.length;
      console.log(this.dna);
      console.log(pAequor.dna);
      for (let i = this.dna.length - 1; i > 0; i--) {
        if (this.dna[i] === pAequor.dna[i]) {
          sameBases += 1;
        }
      }
      let percentage = ((sameBases / totalBases) * 100).toFixed();
      console.log(`Specimen ${this.specimenNum} and specimen ${pAequor.specimenNum} have ${percentage}% DNA in common.`);
    },
    //Determine if the specimen is likely to survive
    willLikelySurvive() {
      let cgBases = 0;
      for (let i = 0; i < this.dna.length; i++) {
        if (this.dna[i] === 'C' || this.dna[i] === 'G') {
          cgBases++;
        }
      }
      let percent = ((cgBases / 15) * 100);
      if (percent >= 60) {
        return true;
      } else {
        return false;
      }
    },
    //Retrun a DNA strand exactly opposite to the current one
    complementStrand() {
      let strand1 = this.dna;
      console.log(strand1);
      let strand2 = [];
      for (let i = 0; i < strand1.length; i++) {
        if (strand1[i] === 'A') {
          strand2.push('T');
        } else if (strand1[i] === 'T') {
          strand2.push('A');
        } else if (strand1[i] === 'G') {
          strand2.push('C');
        } else if (strand1[i] === 'C') {
          strand2.push('G');
        }
      }
      console.log(strand2);
    }
  }
}
pAequorFactory(1, mockUpStrand()).complementStrand();

//Create batch of 30 viable specimens
const viableBatch = [];
let specimenCounter = 1;

while (viableBatch.length < 30) {
  let newPaequor = pAequorFactory(specimenCounter, mockUpStrand());
  if (newPaequor.willLikelySurvive()) {
    viableBatch.push(newPaequor);
  }
  specimenCounter++;
}
//console.log(viableBatch);