Task84 of UniLecs Telegram

Task84.js

function get_factorial(num){
    res = 1;
    for (i = 1; i <= num; i++){
        res *= i;
    }
    return res;
}

function task84 (word){
    res = get_factorial(word.length);
    chars = {};
    for (i = 0; i < word.length; i++){
        if (chars[word[i]] == undefined){
            chars[word[i]] = 1;
        }else{
            chars[word[i]] += 1;
        }
    }
    for (i = 0; i < word.length; i++){
        if (chars[word[i]]>1){
            res/=get_factorial(chars[word[i]])
            chars[word[i]] = 0
        }
    }
    return res;
}

console.log(
    task84(
        "solo"
    )
)