Why is it that the initial code snippet, which uses decimal numbers as keys and Roman numerals as values, fails the input-output test on freecodecamp.com for converting decimal numbers to Roman numerals? Conversely, the alternate code snippet, where the keys and values are interchanged, successfully passes the test. The only distinction between the two versions lies in the arrangement of keys and values within the romanNumerals object.
What is the reason behind this seemingly minor alteration impacting the test outcomes?
The initial code designed to convert decimal numbers to Roman numerals functions correctly solely for inputs like convertToRoman(2) and convertToRoman(3), but encounters failures with other input values such as 4, 5, 9, 12, 16, and so forth. Despite an apparently sound logic and loop iterations, it generates incorrect outputs for a range of input values.
What could be the root cause behind this specific issue occurring for the mentioned input values, and how might it be rectified?
1.
function convertToRoman(num) {
const romanNumerals = {
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"
};
let roman = "";
let restartLoop = false;
do {
restartLoop = false;
for (let key in romanNumerals) {
if (num >= key) {
roman += romanNumerals[key];
num -= key;
restartLoop = true;
break;
}
}
} while (restartLoop);
return roman;
}
console.log(convertToRoman(3))
console.log(convertToRoman(4))
console.log(convertToRoman(23))2.
function convertToRoman(num) {
const romanNumerals = {
"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
};
let roman = "";
let restartLoop = false;
do {
restartLoop = false;
for (let key in romanNumerals) {
if (num >= romanNumerals[key]) {
roman += key;
num -= romanNumerals[key];
restartLoop = true;
break;
}
}
} while (restartLoop);
return roman;
}
console.log(convertToRoman(3))
console.log(convertToRoman(4))
console.log(convertToRoman(23))