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  <meta charset="utf-8">
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  <title>JS Bin</title>
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<script id="jsbin-javascript">
"use strict";

var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

Elevator:
// There is an elevator in a building with M floors.
// This elevator can take a max of X people at a time or max of total weight Y.
// Given that a set of people and their weight and the floor they need to stop,
// how many stops has the elevator taken to serve all the people?
//Consider the elevator serves in "first come first serve" basis and the order for the queue can not be changed.
//
// Example:
// Let Array A be the weight of each person A = [60, 80, 40].
// Let Array B be the floors where each person needs to be dropped off B = [2, 3, 5].
//
// The building has 5 floors, maximum of 2 persons are allowed in the elevator
// at a time with max weight capacity being 200. For this example, the elevator would take total
// of 5 stops in floors: 2, 3, G, 5 and finally G.
"use strict";

var A = [50, 80, 40, 120];
var B = [2, 3, 5, 1];
var maxWeight = 200;
var maxCapacity = 2;

var journeys = undefined;

// are there more people
// if yes, add first person to lift

// up to maxCapacity
// if there are still more people, add next person IF maxWeight is not met

// if lift is empty go back to ground floor
// repeat
var Persons = [{ weight: 50, target: 2 }, { weight: 80, target: 3 }, { weight: 40, target: 5 }, { weight: 120, target: 1 }];

var Lift = (function () {
  function Lift() {
    _classCallCheck(this, Lift);

    this.maxWeight = 200;
    this.maxCapacity = 2;
    this.currentCapacity = 0;
    this.currentWeight = 0;
    this.totalMoves = 0;
    this.currentFloor = 0;
    this.peopleInTheLift = [];
  }

  _createClass(Lift, [{
    key: "onBoardPerson",
    value: function onBoardPerson(person) {
      if (person.weight + this.currentWeight <= this.maxWeight) {
        this.peopleInTheLift.push(person);
        this.currentCapacity += 1;
        this.currentWeight += person.weight;
      }
    }
  }, {
    key: "dropOffPeople",
    value: function dropOffPeople() {
      var _this = this;

      this.peopleInTheLift.forEach(function (person) {
        if (_this.currentFloor !== person.target) {
          _this.totalMoves++;
          _this.currentFloor = person.target;
          _this.currentWeight = _this.currentWeight - person.weight;
          _this.currentCapacity = _this.currentCapacity - 1;
          _this.peopleInTheLift = _this.peopleInTheLift.slice(1, _this.peopleInTheLift.length);
        } else {
          _this.currentWeight = _this.currentWeight - person.weight;
          _this.currentCapacity = _this.currentCapacity - 1;
          _this.peopleInTheLift = _this.peopleInTheLift.slice(1, _this.peopleInTheLift.length);
        }
      });

      this.currentFloor = 0;
      this.totalMoves++;
    }
  }, {
    key: "countMove",
    value: function countMove() {
      return this.totalMoves;
    }
  }]);

  return Lift;
})();
</script>


<script id="jsbin-source-javascript" type="text/javascript">Elevator:
// There is an elevator in a building with M floors.
// This elevator can take a max of X people at a time or max of total weight Y.
// Given that a set of people and their weight and the floor they need to stop,
// how many stops has the elevator taken to serve all the people?
//Consider the elevator serves in "first come first serve" basis and the order for the queue can not be changed.
//
// Example:
// Let Array A be the weight of each person A = [60, 80, 40].
// Let Array B be the floors where each person needs to be dropped off B = [2, 3, 5].
//
// The building has 5 floors, maximum of 2 persons are allowed in the elevator
// at a time with max weight capacity being 200. For this example, the elevator would take total
// of 5 stops in floors: 2, 3, G, 5 and finally G.
"use strict";

const A = [50, 80, 40, 120];
const B = [2, 3, 5, 1];
const maxWeight = 200;
const maxCapacity = 2;


let journeys;


// are there more people
// if yes, add first person to lift

// up to maxCapacity
// if there are still more people, add next person IF maxWeight is not met

// if lift is empty go back to ground floor
// repeat
const Persons = [
  {weight: 50, target: 2},
  {weight: 80, target: 3},
  {weight: 40, target: 5},
  {weight: 120, target: 1},
];


class Lift {
  constructor() {
    this.maxWeight = 200;
    this.maxCapacity = 2;
    this.currentCapacity = 0;
    this.currentWeight = 0;
    this.totalMoves = 0;
    this.currentFloor = 0;
    this.peopleInTheLift = [];
  }

  onBoardPerson(person) {
    if ((person.weight + this.currentWeight) <= this.maxWeight ) {
      this.peopleInTheLift.push(person);
      this.currentCapacity += 1;
      this.currentWeight += person.weight;
    }
  }

  dropOffPeople() {

    this.peopleInTheLift.forEach(person => {
      if (this.currentFloor !== person.target) {
        this.totalMoves ++;
        this.currentFloor = person.target;
        this.currentWeight = this.currentWeight - person.weight;
        this.currentCapacity = this.currentCapacity - 1;
        this.peopleInTheLift = this.peopleInTheLift.slice(1, this.peopleInTheLift.length);
      } else {
        this.currentWeight = this.currentWeight - person.weight;
        this.currentCapacity = this.currentCapacity - 1;
        this.peopleInTheLift = this.peopleInTheLift.slice(1, this.peopleInTheLift.length);
      }
    });

    this.currentFloor = 0;
    this.totalMoves ++;

  }

  countMove() {
    return this.totalMoves;
  }

}


</script></body>
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