/// <inheritdoc />
public IEnumerator <TElement> GetEnumerator()
{
lock (_originSet) {
if (_elementCache != null)
{
return(_elementCache.GetEnumerator());
}
// Copy all matching items into the cache
_elementCache = new LinearList <TElement>();
using (FilterIterator itr = new FilterIterator(_originSet.GetEnumerator(), _wherePredicate)) {
while (itr.MoveNext())
{
_elementCache.Add(itr.Current);
}
}
return(_elementCache.GetEnumerator());
}
}
/// <summary>
/// Returns a newly created array that contains all items of the given sequence <paramref name="sequence"/>.
/// </summary>
/// <param name="sequence">Sequence to process</param>
/// <returns>Array of all sequence items</returns>
public static object[] ToArray(this IEnumerable sequence)
{
// Check if it's already an array
if (sequence is object[] objectArray)
{
return(objectArray);
}
// Check if we need just to perform a copy
if (sequence is ICollection objectCollection)
{
objectArray = new object[objectCollection.Count];
objectCollection.CopyTo(objectArray, 0);
return(objectArray);
}
// Process items
LinearList <object> linkedList = new LinearList <object>();
sequence.ForEach(linkedList.Add);
object[] resultingArray = linkedList.ToArray();
return(resultingArray);
}
/// <summary>
/// Returns a newly created array that contains all items of the given sequence <paramref name="sequence"/>.
/// </summary>
/// <typeparam name="TItem">Type of sequence items</typeparam>
/// <param name="sequence">Sequence to process</param>
/// <returns>Array of all sequence items</returns>
public static TItem[] ToArray <TItem>(this IEnumerable <TItem> sequence)
{
// Check if it's already an array
if (sequence is TItem[] itemArray)
{
return(itemArray);
}
// Check if we need just to perform a copy
if (sequence is ICollection <TItem> itemCollection)
{
itemArray = new TItem[itemCollection.Count];
itemCollection.CopyTo(itemArray, 0);
return(itemArray);
}
// Process items
LinearList <TItem> linkedList = new LinearList <TItem>();
sequence.ForEach(linkedList.Add);
TItem[] resultingArray = linkedList.ToArray();
return(resultingArray);
}