public static int GetCountByPrefix(IReadOnlyList <string> phrases, string prefix)
{
int left = My_LeftBorderTask.GetLeftBorderIndex(phrases, prefix, -1, phrases.Count);
int right = My_RightBorderTask.GetRightBorderIndex(phrases, prefix, -1, phrases.Count);
return(right - left - 1);
}
public static string[] GetTopByPrefix(IReadOnlyList <string> phrases, string prefix, int count)
{
int actualCount = Math.Min(GetCountByPrefix(phrases, prefix), count);
int startIndex = My_LeftBorderTask.GetLeftBorderIndex(phrases, prefix, -1, phrases.Count) + 1;
string[] result = new string[actualCount];
Array.Copy(phrases.ToArray(), startIndex, result, 0, actualCount);
return(result);
}
public static string FindFirstByPrefix(IReadOnlyList <string> phrases, string prefix)
{
var index = My_LeftBorderTask.GetLeftBorderIndex(phrases, prefix, -1, phrases.Count) + 1;
if (index < phrases.Count && phrases[index].StartsWith(prefix, StringComparison.OrdinalIgnoreCase))
{
return(phrases[index]);
}
else
{
return(null);
}
}
