Random.js

const secureRandom = require("secure-random");

const maxNum = 2 ** (8 * 6) - 1;

module.exports = class Random {

	static randFloat() {
		var num = secureRandom(6, { type: "Buffer" }).readUIntBE(0, 6);
		return num / maxNum;
	}

	static randInt(min, max) {
		return Math.floor(this.randFloat() * (max - min + 1) + min);
	}

	static randArrayVal(arr, splice) {
		if (arr.length == 0)
			return;

		const index = this.randInt(0, arr.length - 1);
		const res = arr[index];

		if (splice)
			arr.splice(index, 1);

		return res;
	}

	static randomizeArray(arr) {
		arr = arr.slice();

		var i, temp;
		var m = arr.length - 1;

		while (m > 0) {
			i = Math.floor(this.randFloat() * (m + 1));
			temp = arr[m];
			arr[m] = arr[i];
			arr[i] = temp;
			m--;
		}

		return arr;
	}

}