,System.Func{--0,--1})} ,System.Func{--0,--1},System.Collections.Generic.IEqualityComparer{--1})} ,System.Func{--0,--1},System.Func{--0,--2})} ,System.Func{--0,--1},System.Func{--0,--2},System.Collections.Generic.IEqualityComparer{--1})}
Observable.ToLookup(IObservable, Func) method¶
Defined in
Type: Observable
Namespace: System.Reactive.Linq
Assembly: System.Reactive.dll
Applies to
net8.0, net8.0-windows10.0.19041, net8.0-ios17.5, net8.0-maccatalyst17.5, net8.0-macos14.2, net8.0-macos14.5, net8.0-tvos17.2, netstandard2.0
Overloads¶
- 1.
public static IObservable<ILookup<TKey, TSource>> ToLookup<TSource, TKey>(this IObservable<TSource> source, Func<TSource, TKey> keySelector) - 2.
public static IObservable<ILookup<TKey, TSource>> ToLookup<TSource, TKey>(this IObservable<TSource> source, Func<TSource, TKey> keySelector, IEqualityComparer<TKey> comparer) - 3.
public static IObservable<ILookup<TKey, TElement>> ToLookup<TSource, TKey, TElement>(this IObservable<TSource> source, Func<TSource, TKey> keySelector, Func<TSource, TElement> elementSelector) - 4.
public static IObservable<ILookup<TKey, TElement>> ToLookup<TSource, TKey, TElement>(this IObservable<TSource> source, Func<TSource, TKey> keySelector, Func<TSource, TElement> elementSelector, IEqualityComparer<TKey> comparer)
1. Overload¶
public static IObservable<ILookup<TKey, TSource>> ToLookup<TSource, TKey>(this IObservable<TSource> source, Func<TSource, TKey> keySelector)
Type parameters
| Name | Description |
|---|---|
TSource | -- |
TKey | -- |
Parameters
| Name | Type | Description |
|---|---|---|
source | IObservable | -- |
keySelector | Func | -- |
Returns: IObservable
2. Overload¶
public static IObservable<ILookup<TKey, TSource>> ToLookup<TSource, TKey>(this IObservable<TSource> source, Func<TSource, TKey> keySelector, IEqualityComparer<TKey> comparer)
Type parameters
| Name | Description |
|---|---|
TSource | -- |
TKey | -- |
Parameters
| Name | Type | Description |
|---|---|---|
source | IObservable | -- |
keySelector | Func | -- |
comparer | IEqualityComparer | -- |
Returns: IObservable
3. Overload¶
public static IObservable<ILookup<TKey, TElement>> ToLookup<TSource, TKey, TElement>(this IObservable<TSource> source, Func<TSource, TKey> keySelector, Func<TSource, TElement> elementSelector)
Type parameters
| Name | Description |
|---|---|
TSource | -- |
TKey | -- |
TElement | -- |
Parameters
| Name | Type | Description |
|---|---|---|
source | IObservable | -- |
keySelector | Func | -- |
elementSelector | Func | -- |
Returns: IObservable
4. Overload¶
public static IObservable<ILookup<TKey, TElement>> ToLookup<TSource, TKey, TElement>(this IObservable<TSource> source, Func<TSource, TKey> keySelector, Func<TSource, TElement> elementSelector, IEqualityComparer<TKey> comparer)
Type parameters
| Name | Description |
|---|---|
TSource | -- |
TKey | -- |
TElement | -- |
Parameters
| Name | Type | Description |
|---|---|---|
source | IObservable | -- |
keySelector | Func | -- |
elementSelector | Func | -- |
comparer | IEqualityComparer | -- |
Returns: IObservable