public static async Task <T[]> GetRangeAsync <T>(this BlockSlots <T> blockSlots, int from, int?to)
where T : class
{
if (blockSlots is null)
{
throw new ArgumentNullException(nameof(blockSlots));
}
if (from < 0 || to < 0 || to > blockSlots.Size || from > blockSlots.Size || from > to || blockSlots.Size == 0)
{
throw new ArgumentOutOfRangeException($"to must less {blockSlots.Size}");
}
var t = to ?? (blockSlots.Size - 1);
if (from >= t)
{
#if NET461 || NETSTANDARD2_0
return(Array.Empty <T>());
#else
return(new T[0]);
#endif
}
var rets = new T[t - from + 1];
for (int i = from; i <= t; i++)
{
rets[i] = await blockSlots.GetAsync(i);
}
return(rets);
}
public static Task <T[]> GetAllAsync <T>(this BlockSlots <T> blockSlots)
where T : class
{
if (blockSlots is null)
{
throw new ArgumentNullException(nameof(blockSlots));
}
return(GetRangeAsync(blockSlots, 0, blockSlots.Size - 1));
}
public static bool IsInRange <T>(this BlockSlots <T> blockSlots, int index)
where T : class
{
if (blockSlots is null)
{
throw new ArgumentNullException(nameof(blockSlots));
}
return(index >= 0 && blockSlots.Size != 0 && index < blockSlots.Size);
}
public static IDataCursor <T> ToDataCursor <T>(this BlockSlots <T> blockSlots)
where T : class
{
if (blockSlots is null)
{
throw new ArgumentNullException(nameof(blockSlots));
}
return(new BlockSlotsDataCursor <T>(blockSlots));
}
public static IEnumerable <T> GetCreatedValues <T>(this BlockSlots <T> blockSlots)
where T : class
{
if (blockSlots is null)
{
throw new ArgumentNullException(nameof(blockSlots));
}
for (int i = 0; i < blockSlots.Size; i++)
{
var s = blockSlots[i];
if (!(s is null))
{
yield return(s);
}
}
}
public static IEnumerable <Func <Task <T> > > ToLoadEnumerable <T>(this BlockSlots <T> blockSlots, int start = 0, int?end = null)
where T : class
{
if (blockSlots is null)
{
throw new ArgumentNullException(nameof(blockSlots));
}
if (start < 0 || end > blockSlots.Size || end < 0 || start > blockSlots.Size || start > end || blockSlots.Size == 0)
{
throw new ArgumentOutOfRangeException($"Must [{0},{blockSlots.Size}]");
}
while (start < blockSlots.Size && (end == null || start < end))
{
var i = start;
yield return(() => blockSlots.GetAsync(i));
start++;
}
}
public static IReadOnlyDictionary <int, T> GetCreatedValueMap <T>(this BlockSlots <T> blockSlots)
where T : class
{
if (blockSlots is null)
{
throw new ArgumentNullException(nameof(blockSlots));
}
var dic = new Dictionary <int, T>();
for (int i = 0; i < blockSlots.Size; i++)
{
var s = blockSlots[i];
if (!(s is null))
{
dic.Add(i, s);
}
}
return(dic);
}
public BlockSlotsDataCursor(BlockSlots <TValue> blockSlots)
{
this.blockSlots = blockSlots ?? throw new ArgumentNullException(nameof(blockSlots));
}
