random.js

readme.md

$ node test.js

random.js

const os = require('os');

module.exports = function random() {
   return +(process.hrtime()[1] * os.freemem() % 1000 / 1000).toFixed(2);
}

test.js

const rand = require('./random');
const map = {};
const mapLang = {};

for (let i =0; i < 2000; i++) {
  incr(Math.floor(rand() * 10), map);
  incr(Math.floor(Math.random() * 10), mapLang);
}

console.log(JSON.stringify(map, null, 2));
console.log(JSON.stringify(mapLang, null, 2));

function incr(k, data) {
  if(data[k]) {
    data[k] += 1;
  } else {
    data[k] = 1;
  }
}