mirror of https://github.com/Radarr/Radarr
41 lines
1.1 KiB
C#
41 lines
1.1 KiB
C#
using System;
|
|
using System.Collections.Generic;
|
|
using System.Linq;
|
|
|
|
namespace NzbDrone.Common.Extensions
|
|
{
|
|
public static class EnumerableExtensions
|
|
{
|
|
public static IEnumerable<TSource> DistinctBy<TSource, TKey>(this IEnumerable<TSource> source, Func<TSource, TKey> keySelector)
|
|
{
|
|
var knownKeys = new HashSet<TKey>();
|
|
|
|
return source.Where(element => knownKeys.Add(keySelector(element)));
|
|
}
|
|
|
|
public static void AddIfNotNull<TSource>(this List<TSource> source, TSource item)
|
|
{
|
|
if (item == null)
|
|
{
|
|
return;
|
|
}
|
|
|
|
source.Add(item);
|
|
}
|
|
|
|
public static bool Empty<TSource>(this IEnumerable<TSource> source)
|
|
{
|
|
return !source.Any();
|
|
}
|
|
|
|
public static bool None<TSource>(this IEnumerable<TSource> source, Func<TSource, bool> predicate)
|
|
{
|
|
return !source.Any(predicate);
|
|
}
|
|
|
|
public static bool NotAll<TSource>(this IEnumerable<TSource> source, Func<TSource, bool> predicate)
|
|
{
|
|
return !source.All(predicate);
|
|
}
|
|
}
|
|
} |