Method DistinctUntilChanged
DistinctUntilChanged<TSource>(IAsyncEnumerable<TSource>)
Returns consecutive distinct elements by using the default equality comparer to compare values.
Declaration
public static IAsyncEnumerable<TSource> DistinctUntilChanged<TSource>(this IAsyncEnumerable<TSource> source)Parameters
| Type | Name | Description |
|---|---|---|
| IAsyncEnumerable<TSource> | source | Source sequence. |
Returns
| Type | Description |
|---|---|
| IAsyncEnumerable<TSource> | Sequence without adjacent non-distinct elements. |
Type Parameters
| Name | Description |
|---|---|
| TSource | Source sequence element type. |
Exceptions
| Type | Condition |
|---|---|
| ArgumentNullException |
|
DistinctUntilChanged<TSource>(IAsyncEnumerable<TSource>, IEqualityComparer<TSource>?)
Returns consecutive distinct elements by using the specified equality comparer to compare values.
Declaration
public static IAsyncEnumerable<TSource> DistinctUntilChanged<TSource>(this IAsyncEnumerable<TSource> source, IEqualityComparer<TSource>? comparer)Parameters
| Type | Name | Description |
|---|---|---|
| IAsyncEnumerable<TSource> | source | Source sequence. |
| IEqualityComparer<TSource> | comparer | Comparer used to compare values. |
Returns
| Type | Description |
|---|---|
| IAsyncEnumerable<TSource> | Sequence without adjacent non-distinct elements. |
Type Parameters
| Name | Description |
|---|---|
| TSource | Source sequence element type. |
Exceptions
| Type | Condition |
|---|---|
| ArgumentNullException |
|
DistinctUntilChanged<TSource, TKey>(IAsyncEnumerable<TSource>, Func<TSource, TKey>)
Returns consecutive distinct elements based on a key value by using the specified equality comparer to compare key values.
Declaration
public static IAsyncEnumerable<TSource> DistinctUntilChanged<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, TKey> keySelector)Parameters
| Type | Name | Description |
|---|---|---|
| IAsyncEnumerable<TSource> | source | Source sequence. |
| Func<TSource, TKey> | keySelector | Key selector. |
Returns
| Type | Description |
|---|---|
| IAsyncEnumerable<TSource> | Sequence without adjacent non-distinct elements. |
Type Parameters
| Name | Description |
|---|---|
| TSource | Source sequence element type. |
| TKey | Key type. |
Exceptions
| Type | Condition |
|---|---|
| ArgumentNullException |
|
DistinctUntilChanged<TSource, TKey>(IAsyncEnumerable<TSource>, Func<TSource, ValueTask<TKey>>)
Returns consecutive distinct elements based on a key value by using the specified equality comparer to compare key values.
Declaration
public static IAsyncEnumerable<TSource> DistinctUntilChanged<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector)Parameters
| Type | Name | Description |
|---|---|---|
| IAsyncEnumerable<TSource> | source | Source sequence. |
| Func<TSource, ValueTask<TKey>> | keySelector | Key selector. |
Returns
| Type | Description |
|---|---|
| IAsyncEnumerable<TSource> | Sequence without adjacent non-distinct elements. |
Type Parameters
| Name | Description |
|---|---|
| TSource | Source sequence element type. |
| TKey | Key type. |
Exceptions
| Type | Condition |
|---|---|
| ArgumentNullException |
|
DistinctUntilChanged<TSource, TKey>(IAsyncEnumerable<TSource>, Func<TSource, TKey>, IEqualityComparer<TKey>?)
Returns consecutive distinct elements based on a key value by using the specified equality comparer to compare key values.
Declaration
public static IAsyncEnumerable<TSource> DistinctUntilChanged<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, TKey> keySelector, IEqualityComparer<TKey>? comparer)Parameters
| Type | Name | Description |
|---|---|---|
| IAsyncEnumerable<TSource> | source | Source sequence. |
| Func<TSource, TKey> | keySelector | Key selector. |
| IEqualityComparer<TKey> | comparer | Comparer used to compare key values. |
Returns
| Type | Description |
|---|---|
| IAsyncEnumerable<TSource> | Sequence without adjacent non-distinct elements. |
Type Parameters
| Name | Description |
|---|---|
| TSource | Source sequence element type. |
| TKey | Key type. |
Exceptions
| Type | Condition |
|---|---|
| ArgumentNullException |
|
DistinctUntilChanged<TSource, TKey>(IAsyncEnumerable<TSource>, Func<TSource, ValueTask<TKey>>, IEqualityComparer<TKey>?)
Returns consecutive distinct elements based on a key value by using the specified equality comparer to compare key values.
Declaration
public static IAsyncEnumerable<TSource> DistinctUntilChanged<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, IEqualityComparer<TKey>? comparer)Parameters
| Type | Name | Description |
|---|---|---|
| IAsyncEnumerable<TSource> | source | Source sequence. |
| Func<TSource, ValueTask<TKey>> | keySelector | Key selector. |
| IEqualityComparer<TKey> | comparer | Comparer used to compare key values. |
Returns
| Type | Description |
|---|---|
| IAsyncEnumerable<TSource> | Sequence without adjacent non-distinct elements. |
Type Parameters
| Name | Description |
|---|---|
| TSource | Source sequence element type. |
| TKey | Key type. |
Exceptions
| Type | Condition |
|---|---|
| ArgumentNullException |
|