roman numeral solution

soution.js

const romanNumeralKey = [
  ["I", 1],
  ["V", 5],
];

const romanNumeralLookup = {
  I: 1,
  V: 5,
  X: 10,
  L: 50,
  C: 100,
  D: 500,
  M: 1000,
};

function romanToInt(input) {
  const inputAsArray = input.split("");
  let total = 0;
  let lastChar = "";

  for (let i = 0; i < inputAsArray.length(); i++) {
    let cur = inputAsArray[i];
    let j = i + 1;
    let next = "";
    if (j < inputAsArray.length()) {
      next = inputAsArray[j];
    }

    if (cur === "I" && (next === "X" || next === "V")) {
      if (next === "X") {
        total += 9;
        i++;
      } else {
        total += 4;
        i++
      }
    }
  }

  // inputAsArray.map((char) => {
  //   let number = romanNumeralLookup[char];
  //   if (lastChar === "I" && (char === "X" || char === "V")) {
  //     total = number - total;
  //   } else {
  //     total = total + number;
  //   }
  //   lastChar = char;
  // });

  return total;
}

module.exports = romanToInt;