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Mahmoud_Essam
Mahmoud_Essam

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JavaScript ๐Ÿฒ challenges_3 โš”๏ธ

Roman Numerals Encoder

  • Create a function taking a positive integer as its parameter and returning a string containing the Roman Numeral representation of that integer.
  • Modern Roman numerals are written by expressing each digit separately starting with the left most digit and skipping any digit with a value of zero.
  • In Roman numerals 1990 is rendered: 1000=M, 900=CM, 90=XC; resulting in MCMXC.
  • 2008 is written as 2000=MM, 8=VIII; or MMVIII.
  • 1666 uses each Roman symbol in descending order: MDCLXVI.

Example:

  • solution(1000); // should return 'M'

Help:

   Value    Symbol

    1000:   'M',
    900:    'CM',
    500:    'D',
    400:    'CD',
    100:    'C',
    90:     'XC',
    50:     'L',
    40:     'XL',
    10:     'X',
    9:      'IX',
    5:      'V',
    4:      'IV',
    1:      'I'
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Task URL

My solution:

function solution(number) {

    // convert the number to a roman numeral
    let symbol = {

        1: "I",
        4: "IV",
        5: "V",
        9: "IX",
        10: "X",
        40: "XL",
        50: "L",
        90: "XC",
        100: "C",
        400: "CD",
        500: "D",
        900: "CM",
        1000: "M",
    };

    let result = "";
    let numbers = Object.keys(symbol);
    let romanNumber = Object.values(symbol);

    let decimal = numbers.map((num) => {
        return parseInt(num);
    });

    let reverseDecimalNumbers = decimal.reverse();
    let reverseRomanNumbers = romanNumber.reverse();

    for (var i = 0; i < decimal.length; i++) {

        while (reverseDecimalNumbers[i] <= number) {
            result += reverseRomanNumbers[i];
            number -= reverseDecimalNumbers[i];
        }

    }

    return result;
}

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Code Snapshot:

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