Message generator adding

_small_exercices/mysterious_organism.js

@@ -0,0 +1,69 @@
+// 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));