/// <summary>
/// 安全的转换成字典集
/// </summary>
/// <typeparam name="TSource"></typeparam>
/// <typeparam name="TKey"></typeparam>
/// <typeparam name="TElement"></typeparam>
/// <param name="source"></param>
/// <param name="keySelector">键选择器</param>
/// <param name="elementSelector">值选择器</param>
/// <returns></returns>
public static async Task <DisposableConcurrentDictionary <TKey, TElement> > ToDisposableConcurrentDictionaryAsync <TSource, TKey, TElement>(this IEnumerable <TSource> source, Func <TSource, TKey> keySelector, Func <TSource, Task <TElement> > elementSelector) where TElement : IDisposable
{
var dic = new DisposableConcurrentDictionary <TKey, TElement>();
await source.ForeachAsync(async item => dic[keySelector(item)] = await elementSelector(item));
return(dic);
}
/// <summary>
/// 安全的转换成字典集
/// </summary>
/// <typeparam name="TSource"></typeparam>
/// <typeparam name="TKey"></typeparam>
/// <typeparam name="TElement"></typeparam>
/// <param name="source"></param>
/// <param name="keySelector">键选择器</param>
/// <param name="elementSelector">值选择器</param>
/// <returns></returns>
public static DisposableConcurrentDictionary <TKey, TElement> ToDisposableConcurrentDictionary <TSource, TKey, TElement>(this IEnumerable <TSource> source, Func <TSource, TKey> keySelector, Func <TSource, TElement> elementSelector) where TElement : IDisposable
{
var dic = new DisposableConcurrentDictionary <TKey, TElement>();
foreach (var item in source)
{
dic[keySelector(item)] = elementSelector(item);
}
return(dic);
}
/// <summary>
/// 安全的转换成字典集
/// </summary>
/// <typeparam name="TSource"></typeparam>
/// <typeparam name="TKey"></typeparam>
/// <param name="source"></param>
/// <param name="keySelector">键选择器</param>
/// <param name="defaultValue">键未找到时的默认值</param>
/// <returns></returns>
public static DisposableConcurrentDictionary <TKey, TSource> ToDisposableConcurrentDictionary <TSource, TKey>(this IEnumerable <TSource> source, Func <TSource, TKey> keySelector, TSource defaultValue) where TSource : IDisposable
{
var dic = new DisposableConcurrentDictionary <TKey, TSource>()
{
FallbackValue = defaultValue
};
foreach (var item in source)
{
dic[keySelector(item)] = item;
}
return(dic);
}
