Divide a number into parts but no more than x at a time?

Question

JavaScript

There is a certain integer - 70, you need to split it into parts so that each part of the number is not more than 15, it can be less
How to do this using JavaScript?
What is needed in the end? Get an array with the number of received parts and their size. Something like:
[8, 15, 15, 12, ...].length // 4

Answer 1

As an option, you can:

var a = 70;
var b = 15;
var result= [];

num = (a - (a % b)) / b;

for (i=0; i < num; i++) {
  result.push(b);
}

if ((a % b) < b && (a % b) != 0) {
  result.push((a % b));
}

console.log(result);  // (5) [15, 15, 15, 15, 10]

With random numbers:

var a = 70;
var min = 5;
var max = 15;
var result = [];

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

while (a > 0) {
  b = getRandomIntInclusive(min, max);
  a = a - b;

  if (a >= 0 ) {
    result.push(b);
  } 

  if (a < 0) {
    b = b + a;

    if (b < min) {
      _t = min - b;
      b = b + _t;

      result.forEach(function(item, i) {
          if ((item - _t) > min) {
            result[i] = item - _t;          
            _t = 0; 
          }
        });
    }              
    result.push(b);
  }
}

var result_sum = result.reduce(function(sum, current) {
  return sum + current;
}, 0);


console.log('Сумма всех чисел: '+result_sum); // 70
console.log(result); // (7) [15, 6, 10, 7, 5, 15, 12]