I’m doing the Mysterious Organism challenge whereby at the end I must populate an array with randomly generated DNA suquences.
I’ve succesfully completed the requirements however each time I run the program it generates a new array of randomly generated DNA. I’m wondering if it’s possible to permenantly store the same values of the array even after re-running the program? I hope this makes sense.
let uniqueId = () => {
return Math.floor(Math.random() * 10000);
};
// 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;
};
function pAequorFactory(specID, sequence) {
this.specimenNum = specID;
this.dna = sequence;
this.willLikelySurvive = function () {
let subArr = this.dna.filter((base) => base == "C" || base == "G").length;
let survivability = Math.floor((subArr / 15) * 100);
return survivability >= 60;
};
this.mutate = function () {
let dnaBases = ["A", "T", "C", "G"];
let randomBaseIndex = Math.floor(Math.random() * 15);
altDnaBases = dnaBases.filter((base) => base !== this.dna[randomBaseIndex]);
this.dna[randomBaseIndex] = `*${
altDnaBases[Math.floor(Math.random() * 3)]
}`;
return this.dna;
};
}
pAequorFactory.prototype.compareDNA = function (obj) {
let commonDna = 0;
for (let i = 0; i < this.dna.length; i++) {
if (this.dna[i] === obj.dna[i]) {
commonDna++;
}
}
commonDna = Math.floor((commonDna / 15) * 100);
console.log(
`Specimen #1 and specimen #2 share ${commonDna}% of DNA in common.`
);
};
function collection() {
let dnaCollection = [];
let idCounter = 1;
while (dnaCollection.length < 30) {
let newDna = new pAequorFactory(uniqueId(), mockUpStrand());
if (newDna.willLikelySurvive()) {
dnaCollection.push(newDna);
}
idCounter++;
}
return dnaCollection;
}
const sampleCollection = collection();
console.log(sampleCollection);