Created
May 12, 2016 11:29
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function convertToRoman(inputNum) { | |
var letters = ['I', 'V', 'X', 'L', 'C', 'D', 'M']; | |
var digits = String(inputNum).split('').reverse(); | |
var roman = []; | |
for (var i = 0, length = digits.length; i < length; i++) { | |
var value = Number(digits[i]); | |
var splitStart = i * 3 - i; | |
var workingLetters = letters.slice(splitStart, splitStart + 3); | |
switch(value) { | |
case 1: | |
case 2: | |
case 3: | |
roman.push(workingLetters[0].repeat(value)); | |
break; | |
case 4: | |
roman.push(workingLetters[0] + workingLetters[1]); | |
break; | |
case 5: | |
roman.push(workingLetters[1]); | |
break; | |
case 6: | |
case 7: | |
case 8: | |
roman.push(workingLetters[1] + workingLetters[0].repeat(value - 5)); | |
break; | |
case 9: | |
roman.push(workingLetters[0] + workingLetters[2]); | |
break; | |
} | |
} | |
return roman.reverse().join(''); | |
} |
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