69 lines
1.8 KiB
JavaScript
69 lines
1.8 KiB
JavaScript
// Returns a random DNA base
|
|
function returnRandBase() {
|
|
const dnaBases = ['A', 'T', 'C', 'G'];
|
|
return dnaBases[Math.floor(Math.random() * 4)];
|
|
}
|
|
|
|
// Returns a random single strand of DNA containing 15 bases
|
|
function mockUpStrand() {
|
|
const newStrand = [];
|
|
for (let i = 0; i < 15; i++) {
|
|
newStrand.push(returnRandBase());
|
|
}
|
|
return newStrand;
|
|
}
|
|
|
|
// Factory function to create a DNA specimen object
|
|
function pAequorFactory(specimenNumber, dnaArray) {
|
|
return {
|
|
_specimenNum: specimenNumber,
|
|
_dna: dnaArray,
|
|
|
|
get dna() {
|
|
return this._dna;
|
|
},
|
|
|
|
get specimenNum() {
|
|
return this._specimenNum;
|
|
},
|
|
|
|
mutate() {
|
|
const dnaBases = ['A', 'T', 'C', 'G'];
|
|
let indexToMutate = Math.floor(Math.random() * this._dna.length);
|
|
const currentBase = this._dna[indexToMutate];
|
|
|
|
// Filter out the current base to select a different one
|
|
const otherBases = dnaBases.filter(base => base !== currentBase);
|
|
const newBase = otherBases[Math.floor(Math.random() * otherBases.length)];
|
|
|
|
// Update DNA at the selected index
|
|
this._dna[indexToMutate] = newBase;
|
|
|
|
return this._dna;
|
|
},
|
|
|
|
compareDNA(secondDNA) {
|
|
let DNAsimilarities = 0;
|
|
for (let i = 0; i < this._dna.length; i++) {
|
|
if (this._dna[i] === secondDNA[i]) {
|
|
DNAsimilarities++;
|
|
}
|
|
}
|
|
const commonDNA = DNAsimilarities / 16 * 100; // the *100 is to calculate %age
|
|
return(`The two DNA threads are ${commonDNA.toFixed(2)}% similar.`);
|
|
}
|
|
|
|
};
|
|
}
|
|
|
|
const pAequor1DNA = mockUpStrand();
|
|
const pAequor2DNA = mockUpStrand();
|
|
const pAequor1 = pAequorFactory(1, pAequor1DNA);
|
|
const pAequor2 = pAequorFactory(2, pAequor2DNA);
|
|
|
|
|
|
console.log(`
|
|
${pAequor1.dna}
|
|
${pAequor2.dna}`);
|
|
|
|
console.log(pAequor1.compareDNA(pAequor2.dna)); |