Find N partitions of number M with min and max partition size

partitions.js

// Currently, there's a bug when numbers which are too large are used...

function getRandomPartitionsFromNumber(number, parts, min, max) {
  var result = [];

  for (var i = 0; i < parts; i++) {
    var part = randomIntFromInterval(min, max);
    result.push(part);
  }
  
  var sum = result.reduce(add, 0);

  while (sum !== number) {
    for (i = 0; i < result.length; i++) {
      if (sum > number) {
        if (result[i] > min) {
          result[i]--;
          sum--;
        }
      } else if (sum < number) {
        if (result[i] < max) {
          result[i]++;
          sum++;
        }
      }
    }
  }

  return result;
}

function randomIntFromInterval(min, max) {
    return Math.floor(Math.random() * (max - min + 1) + min);
}

function add(a, b) {
  return a + b;
}