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Refactoring the code using ternary conditioning operator.

Code
Diff
  • var solution = (s) => {
        let total = 0;
        for(let index = 0; index < s.length; index++){
          ((s.length >= index+1) && (romanMap[s[index]] < romanMap[s[index+1]])) 
            ? (total +=romanMap[s[index+1]] - romanMap[s[index]]) && index++ 
            : total += romanMap[s[index]];
        }
        return total;
    };
    
    const romanMap = {
        'I': 1,
        'V': 5,
        'X': 10,
        'L': 50,
        'C': 100,
        'D': 500,
        'M': 1000
    };
    
    • var solution = (s) => {
    • let total = 0;
    • for(let index = 0; index < s.length; index++){
    • if((s.length >= index + 1) && (romanMap[s[index]] < romanMap[s[index + 1]])){
    • total += romanMap[s[index + 1]] - romanMap[s[index]];
    • index ++;
    • } else {
    • total += romanMap[s[index]];
    • }
    • ((s.length >= index+1) && (romanMap[s[index]] < romanMap[s[index+1]]))
    • ? (total +=romanMap[s[index+1]] - romanMap[s[index]]) && index++
    • : total += romanMap[s[index]];
    • }
    • return total;
    • };
    • const romanMap = {
    • 'I': 1,
    • 'V': 5,
    • 'X': 10,
    • 'L': 50,
    • 'C': 100,
    • 'D': 500,
    • 'M': 1000
    • };