Data update

Task/Pseudo-random-numbers-Splitmix64/JavaScript/pseudo-random-numbers-splitmix64.js

@@ -0,0 +1,31 @@
+class Splitmix64 {
+  constructor(seed) {
+    this.state = BigInt(seed);
+    this.mask64 = (1n << 64n) - 1n;
+  }
+
+  next_int() {
+    this.state = (this.state + 0x9e3779b97f4a7c15n) & this.mask64;
+    let z = this.state;
+    z = (z ^ (z >> 30n)) * 0xbf58476d1ce4e5b9n & this.mask64;
+    z = (z ^ (z >> 27n)) * 0x94d049bb133111ebn & this.mask64;
+    return z ^ (z >> 31n) & this.mask64;
+  }
+
+  next_float() {
+    return Number(this.next_int()) / (2 ** 64);
+  }
+}
+
+const random_gen = new Splitmix64(1234567);
+for (let i = 0; i < 5; i++) {
+  console.log(random_gen.next_int());
+}
+
+const random_gen2 = new Splitmix64(987654321);
+let counts = Array(5).fill(0);
+for (let i = 0; i < 100000; i++) {
+	const res = Math.floor(random_gen2.next_float() * 5);
+	counts[res]++;
+}
+console.log(counts);