public static ILookup <TKey, TElement> ToLookup <TSource, TKey, TElement>(this IEnumerable <TSource> source, Func <TSource, TKey> keySelector, Func <TSource, TElement> elementSelector, IEqualityComparer <TKey> comparer)
{
return(Lookup <TKey, TElement> .Create(source, keySelector, elementSelector, comparer));
}
public static ILookup <TKey, TSource> ToLookup <TSource, TKey>(this IEnumerable <TSource> source, Func <TSource, TKey> keySelector, IEqualityComparer <TKey> comparer)
{
return(Lookup <TKey, TSource> .Create(source, keySelector, FuncHelper.GetIdentityFunc <TSource>(), comparer));
}
public static ILookup <TKey, TElement> ToLookup <TSource, TKey, TElement>(this IEnumerable <TSource> source, Func <TSource, TKey> keySelector, Func <TSource, TElement> elementSelector)
{
return(Lookup <TKey, TElement> .Create(source, keySelector, elementSelector, null));
}
public static ILookup <TKey, TSource> ToLookup <TSource, TKey>(this IEnumerable <TSource> source, Func <TSource, TKey> keySelector)
{
return(Lookup <TKey, TSource> .Create(source, keySelector, FuncHelper.GetIdentityFunc <TSource>(), null));
}
