Class EnumerableExtensions

Extension methods for .

Inheritance
System.Object
EnumerableExtensions
Namespace: X10D.Collections
Assembly: X10D.dll
Syntax
public static class EnumerableExtensions : object

Methods

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CountWhereNot<TSource>(IEnumerable<TSource>, Func<TSource, Boolean>)

Returns a number that represents how many elements in the specified sequence do not satisfy a condition.

Declaration
public static int CountWhereNot<TSource>(this IEnumerable<TSource> source, Func<TSource, bool> predicate)
Parameters
Type Name Description
IEnumerable<TSource> source

A sequence that contains elements to be tested and counted.
Func<TSource, System.Boolean> predicate

A function to test each element for a condition.
Returns
Type Description
System.Int32

A number that represents how many elements in the sequence do not satisfy the condition in the predicate function.
Type Parameters
Name Description
TSource

The type of the elements of source.
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DisposeAll<T>(IEnumerable<T>)

Calls on all elements of the .

Declaration
public static void DisposeAll<T>(this IEnumerable<T> source)
    where T : IDisposable
Parameters
Type Name Description
IEnumerable<T> source

The enumerable collection whose elements to dispose.
Type Parameters
Name Description
T

The type of the elements in source.
See Also
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DisposeAllAsync<T>(IEnumerable<T>)

Asynchronously calls on all elements of the .

Declaration
public static Task DisposeAllAsync<T>(this IEnumerable<T> source)
    where T : IAsyncDisposable
Parameters
Type Name Description
IEnumerable<T> source

The enumerable collection whose elements to dispose.
Returns
Type Description
Task
Type Parameters
Name Description
T

The type of the elements in source.
See Also
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FirstWhereNot<TSource>(IEnumerable<TSource>, Func<TSource, Boolean>)

Returns the first element in a sequence that does not satisfy a specified condition.

Declaration
public static TSource FirstWhereNot<TSource>(this IEnumerable<TSource> source, Func<TSource, bool> predicate)
Parameters
Type Name Description
IEnumerable<TSource> source

An to return an element from.
Func<TSource, System.Boolean> predicate

A function to test each element for a condition.
Returns
Type Description
TSource

The first element in the sequence that fails the test in the specified predicate function.
Type Parameters
Name Description
TSource

The type of the elements in source
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FirstWhereNotOrDefault<TSource>(IEnumerable<TSource>, Func<TSource, Boolean>)

Returns the first element in a sequence that does not satisfy a specified condition.

Declaration
public static TSource FirstWhereNotOrDefault<TSource>(this IEnumerable<TSource> source, Func<TSource, bool> predicate)
Parameters
Type Name Description
IEnumerable<TSource> source

An to return an element from.
Func<TSource, System.Boolean> predicate

A function to test each element for a condition.
Returns
Type Description
TSource

langword_csharp_default(TSource) if source is empty or if no element passes the test specified by predicate; otherwise, the first element in source that fails the test specified by predicate.
Type Parameters
Name Description
TSource

The type of the elements in source
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For<T>(IEnumerable<T>, Action<Int32, T>)

Performs the specified action on each element of the .

Declaration
public static void For<T>(this IEnumerable<T> source, Action<int, T> action)
Parameters
Type Name Description
IEnumerable<T> source

The whose elements on which to perform action.
Action<System.Int32, T> action

The delegate to perform on each element of the . The argument passed to this delegate represents the index.
Type Parameters
Name Description
T

The type of the elements in source.
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ForEach<T>(IEnumerable<T>, Action<T>)

Performs the specified action on each element of the .

Declaration
public static void ForEach<T>(this IEnumerable<T> source, Action<T> action)
Parameters
Type Name Description
IEnumerable<T> source

The whose elements on which to perform action.
Action<T> action

The delegate to perform on each element of the .
Type Parameters
Name Description
T

The type of the elements in source.
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LastWhereNot<TSource>(IEnumerable<TSource>, Func<TSource, Boolean>)

Returns the last element in a sequence that does not satisfy a specified condition.

Declaration
public static TSource LastWhereNot<TSource>(this IEnumerable<TSource> source, Func<TSource, bool> predicate)
Parameters
Type Name Description
IEnumerable<TSource> source

An to return an element from.
Func<TSource, System.Boolean> predicate

A function to test each element for a condition.
Returns
Type Description
TSource

The last element in the sequence that fails the test in the specified predicate function.
Type Parameters
Name Description
TSource

The type of the elements in source
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LastWhereNotOrDefault<TSource>(IEnumerable<TSource>, Func<TSource, Boolean>)

Returns the last element in a sequence that does not satisfy a specified condition.

Declaration
public static TSource LastWhereNotOrDefault<TSource>(this IEnumerable<TSource> source, Func<TSource, bool> predicate)
Parameters
Type Name Description
IEnumerable<TSource> source

An to return an element from.
Func<TSource, System.Boolean> predicate

A function to test each element for a condition.
Returns
Type Description
TSource

langword_csharp_default(TSource) if source is empty or if no element passes the test specified by predicate; otherwise, the last element in source that fails the test specified by predicate.
Type Parameters
Name Description
TSource

The type of the elements in source
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Shuffled<T>(IEnumerable<T>, Nullable<Random>)

Reorganizes the elements in an enumerable by implementing a Fisher-Yates shuffle, and returns th shuffled result.

Declaration
public static IReadOnlyCollection<T> Shuffled<T>(this IEnumerable<T> source, Random? random = null)
Parameters
Type Name Description
IEnumerable<T> source

The to shuffle.
System.Nullable<Random> random

Optional. The instance to use for the shuffling.
Returns
Type Description
IReadOnlyCollection<T>

The shuffled collection.
Type Parameters
Name Description
T

The element type.
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WhereNot<TSource>(IEnumerable<TSource>, Func<TSource, Boolean>)

Filters a sequence of values based on a predicate, such that all elements in the result do not match the predicate.

Declaration
public static IEnumerable<TSource> WhereNot<TSource>(this IEnumerable<TSource> source, Func<TSource, bool> predicate)
Parameters
Type Name Description
IEnumerable<TSource> source

An to filter.
Func<TSource, System.Boolean> predicate

A function to test each element for a condition.
Returns
Type Description
IEnumerable<TSource>

An that contains elements from the input sequence that do not satisfy the condition.
Type Parameters
Name Description
TSource

The type of the elements of source.
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WhereNotNull<TSource>(IEnumerable<TSource>)

Filters a sequence of values by omitting elements that are null (langword_csharp_Nothing in Visual Basic).

Declaration
public static IEnumerable<TSource> WhereNotNull<TSource>(this IEnumerable<TSource> source)
Parameters
Type Name Description
IEnumerable<TSource> source

An to filter.
Returns
Type Description
IEnumerable<TSource>

An that contains elements from the input sequence that are not null (langword_csharp_Nothing in Visual Basic).
Type Parameters
Name Description
TSource

The type of the elements of source.