repos/CPP-Signal-Bus/CPP-Signal-Bus/myHelper.cpp

#pragma once

#include <cstdlib>
#include <random>
#include <cmath>
#include <math.h>
#include <iostream>
#include <ctime>
#include <string>
#include <vector>

#define M_PI 3.1413927

using namespace std;

class myHelper {
public:

	template <typename T>
	static T uniformDistribution(T a, T b) {
		T max, min;
		if (a > b) {
			max = a; min = b;
		}
		else {
			max = b; min = a;
		}
		random_device rd;
		mt19937 gen(rd());
		uniform_real_distribution<double> distr(min, max);

		return (T)distr(gen);
	}
	template <typename T>
	static T normalDistribution(T u, T o) {
		srand(time(0));
		double u1 = uniformDistribution<double>(0.0, 1.0);
		double u2 = uniformDistribution<double>(0.0, 1.0);

		double z0 = sqrt(-2.0 * log(u1)) * cos(2.0 * M_PI * u2);
		double z1 = sqrt(-2.0 * log(u1)) * sin(2.0 * M_PI * u2);

		double res = z0 * o + u;

		return (T)res;

	}

	static int randomInt(int a, int b) {
		if (a > b) {
			int temp = a;
			a = b;
			b = temp;
		}
		return (int)uniformDistribution<int>(a, b);
	}
	static int getRandomInt(int a, int b) {
		return randomInt(a, b);
	}
	template <typename T>
	static T getRandomItemFrom(vector<T> arr) {
		int index = randomInt(0, arr.size());

		return arr[index];
	}
	static double randomDouble(double a, double b) {
		if (a > b) {
			double temp = a;
			a = b;
			b = temp;
		}
		return (double)uniformDistribution<double>(a, b);
	}
	static string randomString(int len = 9) {
		const char alphanum[] =
			"0123456789"
			"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
			"abcdefghijklmnopqrstuvwxyz";
		int stringLen = sizeof(alphanum) - 1;

		string str;
		for (int i = 0; i < len; i++) {
			int rnd = randomInt(0, stringLen);
			str += alphanum[rnd % stringLen];
		}
		return str;
	}

	static int coinFlip() {
		return randomInt(0, 2);
	}
	static int diceRoll() {
		return randomInt(1, 7);
	}
	static int diceRoll(int size) {
		return randomInt(1, size + 1);
	}

};