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
}

// Answer starts here
const pAequorFactory = (specimenNum, dna) => {
  return {
    specimenNum,
    dna,
    mutate() {
      const x = Math.floor(Math.random() * this.dna.length)
      let y = this.dna[x]
      let z;
      do {
        z = returnRandBase()
      } while (y == z);
      this.dna[x] = z

      return this.dna
    },
    compareDNA(pAequor) {
      let commonDNA = []

      this.dna.forEach((element, i) => {
        if (element === pAequor[i]) {
          commonDNA.push(element)
        }
      })

      console.log(`specimen #1 and specimen #2 have ${Math.floor((commonDNA.length / this.dna.length * 100))}% in common`)
    },
    willLikelySurvive() {
      let bases = []
      let survivalRate = bases.length/this.dna.length

      this.dna.forEach(element => {
        if (element === 'C' || element === 'G') {
          bases.push(element)
        }
      })
      if (bases.length/this.dna.length >= 0.6) {
        return true
      } else {
        return false
      }

    }
  }
}

const teamRequest = () => {
  let thirty = []
  let i = 1
  let pAequor;
  while (thirty.length != 30) {
    pAequor = pAequorFactory(i, mockUpStrand())
    if (pAequor.willLikelySurvive() === true) {
      thirty.push(pAequor)
      i++
    }
  }
  return thirty
}

console.log(teamRequest())

// console.log(pAequorFactory(1, mockUpStrand()).mutate())
// pAequorFactory(1, mockUpStrand()).compareDNA(['A', 'C', 'T', 'G', 'C', 'A', 'T', 'T', 'C', 'A', 'T', 'T', 'C', 'A', 'T'])
// console.log(pAequorFactory(1, mockUpStrand()).willLikelySurvive())