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Raw Blame History

id	title	challengeType	forumTopicId	dashedName
a7f4d8f2483413a6ce226cac	Roman Numeral Converter	5	16044	roman-numeral-converter

--description--

Convert the given number into a roman numeral.

All roman numerals answers should be provided in upper-case.

--hints--

convertToRoman(2) should return "II".

assert.deepEqual(convertToRoman(2), 'II');

convertToRoman(3) should return "III".

assert.deepEqual(convertToRoman(3), 'III');

convertToRoman(4) should return "IV".

assert.deepEqual(convertToRoman(4), 'IV');

convertToRoman(5) should return "V".

assert.deepEqual(convertToRoman(5), 'V');

convertToRoman(9) should return "IX".

assert.deepEqual(convertToRoman(9), 'IX');

convertToRoman(12) should return "XII".

assert.deepEqual(convertToRoman(12), 'XII');

convertToRoman(16) should return "XVI".

assert.deepEqual(convertToRoman(16), 'XVI');

convertToRoman(29) should return "XXIX".

assert.deepEqual(convertToRoman(29), 'XXIX');

convertToRoman(44) should return "XLIV".

assert.deepEqual(convertToRoman(44), 'XLIV');

convertToRoman(45) should return "XLV"

assert.deepEqual(convertToRoman(45), 'XLV');

convertToRoman(68) should return "LXVIII"

assert.deepEqual(convertToRoman(68), 'LXVIII');

convertToRoman(83) should return "LXXXIII"

assert.deepEqual(convertToRoman(83), 'LXXXIII');

convertToRoman(97) should return "XCVII"

assert.deepEqual(convertToRoman(97), 'XCVII');

convertToRoman(99) should return "XCIX"

assert.deepEqual(convertToRoman(99), 'XCIX');

convertToRoman(400) should return "CD"

assert.deepEqual(convertToRoman(400), 'CD');

convertToRoman(500) should return "D"

assert.deepEqual(convertToRoman(500), 'D');

convertToRoman(501) should return "DI"

assert.deepEqual(convertToRoman(501), 'DI');

convertToRoman(649) should return "DCXLIX"

assert.deepEqual(convertToRoman(649), 'DCXLIX');

convertToRoman(798) should return "DCCXCVIII"

assert.deepEqual(convertToRoman(798), 'DCCXCVIII');

convertToRoman(891) should return "DCCCXCI"

assert.deepEqual(convertToRoman(891), 'DCCCXCI');

convertToRoman(1000) should return "M"

assert.deepEqual(convertToRoman(1000), 'M');

convertToRoman(1004) should return "MIV"

assert.deepEqual(convertToRoman(1004), 'MIV');

convertToRoman(1006) should return "MVI"

assert.deepEqual(convertToRoman(1006), 'MVI');

convertToRoman(1023) should return "MXXIII"

assert.deepEqual(convertToRoman(1023), 'MXXIII');

convertToRoman(2014) should return "MMXIV"

assert.deepEqual(convertToRoman(2014), 'MMXIV');

convertToRoman(3999) should return "MMMCMXCIX"

assert.deepEqual(convertToRoman(3999), 'MMMCMXCIX');

--seed--

--seed-contents--

function convertToRoman(num) {
 return num;
}

convertToRoman(36);

--solutions--

function convertToRoman(num) {
  var ref = [['M', 1000], ['CM', 900], ['D', 500], ['CD', 400], ['C', 100], ['XC', 90], ['L', 50], ['XL', 40], ['X', 10], ['IX', 9], ['V', 5], ['IV', 4], ['I', 1]];
  var res = [];
  ref.forEach(function(p) {
    while (num >= p[1]) {
      res.push(p[0]);
      num -= p[1];
    }
  });
  return res.join('');
}

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