private TResult[] LazyToArray()
{
Debug.Assert(_source.GetCount(onlyIfCheap: true) == -1);
var builder = new LargeArrayBuilder <TResult>(initialize: true);
foreach (TSource input in _source)
{
builder.Add(_selector(input));
}
return(builder.ToArray());
}
public TResult[] ToArray()
{
int count = _source.GetCount(onlyIfCheap: true);
switch (count)
{
case -1:
return(EnumerableHelpers.ToArray(this));
case 0:
return(Array.Empty <TResult>());
default:
TResult[] array = new TResult[count];
int index = 0;
foreach (TSource input in _source)
{
array[index] = _selector(input);
++index;
}
return(array);
}
}