CODE EXAMPLE FOR JAVASCRIPT

Palindrome

// can we generate palindrome string by suffling 
// the character of the string s 
public bool CanBePalindrome(string s)
{
    var dict = new Dictionary<char, int>();
    for (int j =0; j < s.Length; j++)
    {
        var item = s[j];
        if (dict.ContainsKey(item))
        {
            dict[item]++;
            if (dict[item] == 2)
            {
                dict.Remove(item);
            }
        }
        else
        {
            dict.Add(item, 1);
        }
    }
    return dict.Count <= 1;
}