public T this[int index]
{
get
{
FrameRow row = new FrameRow(this.frame, index);
return(function(row));
}
}
/// <summary>
/// Selects rows matching the given criteria.
/// </summary>
/// <param name="selector">A function which accepts or rejects rows.</param>
/// <returns>A new view, containing only those rows which were accepted by the <paramref name="selector"/> function.</returns>
/// <exception cref="ArgumentNullException"><paramref name="selector"/> is <see langword="null"/>.</exception>
public FrameView Where(Func <FrameRow, bool> selector)
{
if (selector == null)
{
throw new ArgumentNullException(nameof(selector));
}
List <int> newMap = new List <int>();
for (int i = 0; i < map.Count; i++)
{
FrameRow row = new FrameRow(this, i);
bool include = selector(row);
if (include)
{
newMap.Add(map[i]);
}
}
return(new FrameView(this.columns, newMap));
}
