rusco · November 27, 2023 13:16
diff --git a/normaldist_simulator.js b/normaldist_simulator.js

 //purpose:  use random numbers from 1 to 6 (dice) to simulate normal distribution in js, only for educational purposes
 //author:   jr
 //date:     27.11.2023
 const min = 1, max = 6;

 let getRand = (countRand = 1) => {
    let sumRand = 0;
    for (let i = 0; i < countRand; i++)
        sumRand += Math.floor(Math.random() * (max - min + 1)) + min;
    let rand = Math.round(sumRand / countRand);
    return rand;
 }



 //begin map1
 {
    let map = new Map();
    for (let i = 0; i < 1_000_000; i++) { //oneLoop

        //only 1 random number: 
        let rand = getRand(1);

        let gotVal = map.get(rand) ?? 0;
        let newVal = gotVal + 1;
        map.set(rand, newVal);
    }
    let sum = [...map.values()].reduce((a, b) => a + b);
    let map2 = new Map([...map.entries()].sort());
    for (let [k, v] of map2) {
        console.log("map1: ", k, "  ", (v / sum * 100).toFixed(2))
    }
    console.log("-------------------------------------------------------------------------");
 }


 //begin map2
 {
    let map = new Map();
    for (let i = 0; i < 1_000_000; i++) { 

        let rand = getRand(5); //increment 5 to other values: 8, 12, 15, 20 ...

        let gotVal = map.get(rand) ?? 0;
        let newVal = gotVal + 1;
        map.set(rand, newVal);
    }
    let sum = [...map.values()].reduce((a, b) => a + b);
    let map2 = new Map([...map.entries()].sort());
    for (let [k, v] of map2) {
        console.log("map2: ", k, "  ", (v / sum * 100).toFixed(2))
    }
    console.log("-------------------------------------------------------------------------");
 }

	//purpose: use random numbers from 1 to 6 (dice) to simulate normal distribution in js, only for educational purposes
	//author: jr
	//date: 27.11.2023
	const min = 1, max = 6;

	let getRand = (countRand = 1) => {
	let sumRand = 0;
	for (let i = 0; i < countRand; i++)
	sumRand += Math.floor(Math.random() * (max - min + 1)) + min;
	let rand = Math.round(sumRand / countRand);
	return rand;
	}



	//begin map1
	{
	let map = new Map();
	for (let i = 0; i < 1_000_000; i++) { //oneLoop

	//only 1 random number:
	let rand = getRand(1);

	let gotVal = map.get(rand) ?? 0;
	let newVal = gotVal + 1;
	map.set(rand, newVal);
	}
	let sum = [...map.values()].reduce((a, b) => a + b);
	let map2 = new Map([...map.entries()].sort());
	for (let [k, v] of map2) {
	console.log("map1: ", k, " ", (v / sum * 100).toFixed(2))
	}
	console.log("-------------------------------------------------------------------------");
	}


	//begin map2
	{
	let map = new Map();
	for (let i = 0; i < 1_000_000; i++) {

	let rand = getRand(5); //increment 5 to other values: 8, 12, 15, 20 ...

	let gotVal = map.get(rand) ?? 0;
	let newVal = gotVal + 1;
	map.set(rand, newVal);
	}
	let sum = [...map.values()].reduce((a, b) => a + b);
	let map2 = new Map([...map.entries()].sort());
	for (let [k, v] of map2) {
	console.log("map2: ", k, " ", (v / sum * 100).toFixed(2))
	}
	console.log("-------------------------------------------------------------------------");
	}