implement-queue

class Queue {
  constructor() {
    this.body = {};
    this.minimum;
  }
  
  enqueue(val) {
    const recurse = function recurse(obj) {
      if (obj.above === undefined) {
        obj.val = val;
        obj.above = {}
      } else {
        recurse(obj.above)
      }
    }
    
    recurse(this.body)
    
    if (this.minimum===undefined || val<this.minimum) this.minimum = val;
    return this.count();
  }
  
  dequeue() {
    const bottom = this.body.val;
    this.body = this.body.above || {};
    return bottom;
  }
  
  count() {
    const recurse = function recurse(obj) {
      if (obj.val === undefined) return 0;
      return 1 + recurse(obj.above);
    }
      
    return recurse(this.body);
  }
  
  min() {
    return this.minimum;
  }
}

const myQueue = new Queue();

myQueue.enqueue(12);
myQueue.enqueue(15);
myQueue.enqueue(17);
myQueue.dequeue()
myQueue.dequeue()


myQueue.min();   // 12