Show HN: Aimless.js – the missing js randomness library(github.com)

  const randIntRange = (i, j, engine = defaultEngine) => {
    const min = Math.ceil(i)
    const max = Math.floor(j)

    return Math.floor(engine() * (max - min + 1)) + min
  }

  function randBelow(n) {
    const nbits = Math.ceil(Math.log2(n));
    while (true) {
       const x = getRandBits(nbits);
       if (x < n) { return x; }
    }
  }

  function randIntHalfOpenRange(min, max) {
    return min + randBelow(max - min);
  }

  function randIntRange(min, max) {
    return randIntHalfOpenRange(min, max + 1);
  }

    const weightedDiceRoll =
    weighted(
        [1,2,3,4,5,6],
        [1,1,1,1,1,10]
    )
    // will return 6 much more often than the other options