/// <summary>
/// Presorts the provided enumeration in batches and then performs an optimized insert on the resulting set(s).
/// </summary>
/// <param name="unorderedItems">The items to insert</param>
/// <param name="allowUpdates">True to overwrite any existing records</param>
/// <returns>The total number of records inserted or updated</returns>
public int AddRange(IEnumerable <KeyValuePair <TKey, TValue> > unorderedItems, bool allowUpdates)
{
int total = 0;
int count = 0;
KeyValuePair <TKey, TValue>[] items = new KeyValuePair <TKey, TValue> [2048];
KeyValueComparer <TKey, TValue> kvcomparer = new KeyValueComparer <TKey, TValue>(_keyComparer);
foreach (KeyValuePair <TKey, TValue> item in unorderedItems)
{
if (count == 0x010000)
{
MergeSort.Sort(items, kvcomparer);
total += AddRangeSorted(items, allowUpdates);
Array.Clear(items, 0, items.Length);
count = 0;
}
if (count == items.Length)
{
Array.Resize(ref items, items.Length * 2);
}
items[count++] = item;
}
if (count > 0)
{
if (count != items.Length)
{
Array.Resize(ref items, count);
}
MergeSort.Sort(items, kvcomparer);
total += AddRangeSorted(items, allowUpdates);
}
return(total);
}
/// <summary>
/// Merges n-number of ordered enumerations based on the comparer provided.
/// </summary>
public static IEnumerable <KeyValuePair <TKey, TValue> > Merge(IComparer <TKey> comparer, DuplicateHandling duplicateHandling, params IEnumerable <KeyValuePair <TKey, TValue> >[] enums)
{
KeyValueComparer <TKey, TValue> kvcompare = new KeyValueComparer <TKey, TValue>(comparer);
return(WithDuplicateHandling(Merge(kvcompare, enums), kvcompare, duplicateHandling));
}