Iwu skill test

main.js

function copyObject(objOrig) {
    let objCopy = {};
    let key     = '';

    for(key in objOrig) {
        if (objOrig.hasOwnProperty(key)) {
            objCopy[key] = typeof objOrig[key] === 'object' ? copyObject(objOrig[key]) : objOrig[key];
        }
    }

    return objCopy;
}


function drawRating(vote) {
    if (vote < 21) {
        return '★☆☆☆☆';
    }
    if (vote < 41) {
        return '★★☆☆☆';
    }
    if (vote < 61) {
        return '★★★☆☆';
    }
    if (vote < 81) {
        return '★★★★☆';
    }

    return '★★★★★';
}
// more dinamic variant, but too complex
function drawRating2(vote) {
    let n          = 0;
    let stars      = [];
    let starsCount = parseInt(vote / 20) + ((vote % 20 > 0) ? 1 : 0);

    if (starsCount === 0) {
        starsCount = 1;
    }
    for(n = 0; n < starsCount; n++) {
        stars.push('★');
    }
    while(stars.length < 5) {
        stars.push('☆');
    }

    return stars.join('');
}

function func(s, a, b) {
    if (s.length === 0) {
        return -1;
    }

    let i = s.length -1;
    let aIndex =     -1;
    let bIndex =     -1;

    while ((aIndex == -1) && (bIndex == -1) && (i > 0)) {
        if (s.substring(i, i + 1) == a) {
            aIndex = i;
        }
        if (s.substring(i, i + 1) == b) {
            bIndex = i;
        }
        i--;
    }

    if (aIndex != -1) {
        return bIndex == -1 ? aIndex : Math.max(aIndex, bIndex);
    }

    return bIndex != -1 ? bIndex : -1;
}