lior-amsalem · October 17, 2021 18:55
diff --git a/roman-numerals-decoder.js b/roman-numerals-decoder.js
 /**
 solution('XXI'); // should return 21
 **/

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

 function solution(roman){
  return roman.split('').map(a => helper[a]).reduce((a,b) => (a >= b) ? (a + b) : (b - a));
 }
	/**
	solution('XXI'); // should return 21
	**/

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

	function solution(roman){
	return roman.split('').map(a => helper[a]).reduce((a,b) => (a >= b) ? (a + b) : (b - a));
	}