Testing out simple probability stuff

random-playground.js

// Playground for testing simple probability

// more cycles more consistent the output
let cycles = 1000;

// how often do you want value to return true
// 0 === never, 1 === always
let truthAmount = 0.7;

// run the test
let output = [];
while (cycles > 0) {
  output.push(Math.random() < truthAmount);
  cycles = cycles - 1;
}

// log how often it was true
console.log(
  output.reduce((acc, val) => {
    acc = val ? acc + 1 : acc;
    return acc;
  }, 0) / output.length
);


// example of flipping a coin
const flipCoin = (Math.random() < 0.5) ? 'heads' : 'tails'

// example of a dice rolling a 6
const roll = (Math.random() < 0.16) ? '6' : 'not a 6'