cashAmount

gistfile1.txt

// Problem case with floating-point arithmetic: 0.10 + 0.20 !== 0.30
// But for us, should be: 0.10 + 0.20 === 0.30

function CashAmount (amount) {
  this.amount = amount;
};

CashAmount.prototype.totalInPennies = function() {
  const result = this.amount * 100;
  return result;
};

CashAmount.prototype.addDoubleAmount = function(amount) {
  this.amount += amount;
  return this.amount;
};

CashAmount.prototype.quantityOfEachDenomination = function() {
  var cents = this.amount.toString().split('.');
  if (cents[1].length === 1) {
  	cents = Number(cents[1]) * 10;
  } else {
  	cents = Number(cents[1]);
  }

  var denominations = {
	  'hundreds': Math.floor(this.amount / 100),
	  'fifties': Math.floor(this.amount / 50),
	  'twenties': Math.floor(this.amount / 20),
	  'tens': Math.floor(this.amount / 10),
	  'fives': Math.floor(this.amount / 5),
	  'ones': Math.floor(this.amount / 1),
	  'quarters': Math.floor(Math.floor(this.amount / 1) * 4) + Math.floor(cents / 4),
	  'dimes': Math.floor(Math.floor(this.amount / 1) * 10,
	  'nickels': Math.floor(Math.floor(this.amount / 1) * 20,
	  'pennies': Math.floor(Math.floor(this.amount / 1) * 100
  };
  return denominations;
};

CashAmount.prototype.toDouble = function() {
  return this.amount;
};

CashAmount.prototype.toDouble = function() {
  return this.amount.toString();
};

//EXAMPLE
/*
var cash = new CashAmount(10.50);
cash.totalInPennies(); // -> 1050
*/