Data update

Task/Knuths-algorithm-S/JavaScript/knuths-algorithm-s.js

@@ -0,0 +1,36 @@
+class SOfN {
+    constructor(n) {
+        this.m = this.n = n
+        this.s = []
+    }
+
+    add(item) {
+        if (this.s.length < this.n) {
+            this.s.push(item)
+        } else {
+            const rand = Math.floor(Math.random() * ++this.m)
+            if (rand < this.n) {
+                this.s[rand] = item
+            }
+        }
+    }
+}
+
+function main() {
+    for (const [n, m] of [[3, 3], [3, 10]]) {
+        const freqs = new Array(m).fill(0)
+
+        for (let i = 0; i < 1e5; ++i) {
+            const sOfN = new SOfN(n)
+            for (let x = 0; x < m; ++x) {
+                sOfN.add(x)
+            }
+            for (const d of sOfN.s) {
+                ++freqs[d]
+            }
+        }
+        console.log(`Results for n=${n}, m=${m}: [${freqs.join(', ')}]`)
+    }
+}
+
+main()