algs4js/dist/misc/DecimalToRomanNumeral.js

Basic algorithms and data structures implemented with es6

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

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"); } }

/**
 * Class DecimalToRomanNumerals
 *
 * Provides simple string algorithm functionality.
 */
var DecimalToRomanNumerals = function () {
  function DecimalToRomanNumerals() {
    _classCallCheck(this, DecimalToRomanNumerals);
  }

  _createClass(DecimalToRomanNumerals, null, [{
    key: 'convert',
    value: function convert(num) {
      var decimals = num.toString().split('').reverse();
      var roman = [];
      for (var i = 0; i < decimals.length; i++) {
        roman.unshift(this.numberMap[decimals[i] * Math.pow(10, i)]);
      }
      return roman.join('');
    }
  }]);

  return DecimalToRomanNumerals;
}();

DecimalToRomanNumerals.numberMap = {
  1: 'I',
  2: 'II',
  3: 'III',
  4: 'IV',
  5: 'V',
  6: 'VI',
  7: 'VII',
  8: 'VIII',
  9: 'IX',
  10: 'X',
  20: 'XX',
  30: 'XXX',
  40: 'XL',
  50: 'L',
  60: 'LX',
  70: 'LXX',
  80: 'LXXX',
  90: 'XC',
  100: 'C',
  200: 'CC',
  300: 'CCC',
  400: 'CD',
  500: 'D',
  600: 'DC',
  700: 'DCC',
  800: 'DCCC',
  900: 'CM',
  1000: 'M',
  2000: 'MM',
  3000: 'MMM'
};

exports.default = DecimalToRomanNumerals;