/// <summary>
/// Gets shortest words recursively starting from given TrieNode.
/// </summary>
private void GetShortestWords(TrieNode trieNode,
ICollection <string> shortestWords, StringBuilder buffer, Wrapped <int> length)
{
if (trieNode.IsWord)
{
if (buffer.Length < length.Value)
{
shortestWords.Clear();
length.Value = buffer.Length;
}
if (buffer.Length == length.Value)
{
shortestWords.Add(buffer.ToString());
}
}
foreach (var child in trieNode.GetChildren())
{
buffer.Append(child.Character);
GetShortestWords(child, shortestWords, buffer, length);
buffer.Length--;
}
}