function rand(min, max) {
    return Math.floor(randf(min, max));
  }
  
  function randf(min, max) {
    if (max == null) {
      max = min || 1;
      min = 0;
    }
    return Math.random() * (max - min) + min;
  }
  
  function randOneFrom(items) {
    return items[rand(items.length)];
  }
  
  function randOneIn(max = 2) {
    return rand(0, max) === 0;
  }
  
  export default {
    rand,
    randf,
    randOneFrom,
    randOneIn
  };