Text Processing 06. Pascal-Case Splitter

function solve(string) {

    let pascalArray = [];
    let regex = /[A-Z]/g;
    let found = string.match(regex);
    let currentWord = '';
    //found = [ 'S', 'M', 'I', 'Y', 'C', 'H', 'H', 'Y', 'C', 'O', 'Y', 'C' ]
    for (let i = 0; i < found.length; i++) {
        let firstIndex = string.indexOf(found[i]);

        let lastIndex = string.indexOf(found[i + 1], firstIndex + 1);
        if (lastIndex !== -1) {
            currentWord = string.substring(firstIndex, lastIndex);
        } else {
            currentWord = string.substring(firstIndex);
        }
        pascalArray.push(currentWord);
        string = string.substring(lastIndex);
    }
    pascalArray = pascalArray.filter(e => e);
    console.log(pascalArray.join(', '));
}

/*function solve(string) {
    const isUpperCase = (symbol) => {
        return symbol === symbol.toUpperCase();
    };
    let pascalArray = [];
    let currentWord = string[0];
    for (let i = 1; i < string.length; i++) {
        if (isUpperCase(string[i])) {
            pascalArray.push(currentWord);
            currentWord = string[i];
        } else {
            currentWord += string[i];
        }

    }
    pascalArray.push(currentWord);
    console.log(pascalArray.join(', '));
}*/