jellyfin/MediaBrowser.Common/Extensions/CollectionExtensions.cs
Bond-009 ee637e8fec Fix warnings, improve performance (#1665)
* Fix warnings, improve performance

`QueryResult.Items` is now a `IReadOnlyList` so we don't need to
allocate a new `Array` when we have a `List` (and `Items` shouldn't need to
be mutable anyway)

* Update Providers .csproj to latest C#

* Remove extra newline from DtoService.cs

* Remove extra newline from UserLibraryService.cs
2019-09-02 02:19:29 -04:00

32 lines
1.3 KiB
C#

using System.Collections.Generic;
namespace MediaBrowser.Common.Extensions
{
// The MS CollectionExtensions are only available in netcoreapp
public static class CollectionExtensions
{
public static TValue GetValueOrDefault<TKey, TValue> (this IReadOnlyDictionary<TKey, TValue> dictionary, TKey key)
{
dictionary.TryGetValue(key, out var ret);
return ret;
}
// REVIEW: Inline?
/// <summary>
/// Copies all the elements of the current collection to the specified list
/// starting at the specified destination array index. The index is specified as a 32-bit integer.
/// </summary>
/// <param name="source">The current collection that is the source of the elements.</param>
/// <param name="destination">The list that is the destination of the elements copied from the current collection.</param>
/// <param name="index">A 32-bit integer that represents the index in <c>destination</c> at which copying begins.</param>
/// <typeparam name="T"></typeparam>
public static void CopyTo<T>(this IReadOnlyCollection<T> source, IList<T> destination, int index = 0)
{
foreach (T item in source)
{
destination[index++] = item;
}
}
}
}