Class ExtensionMethodsSet

Namespace

NDepend.Helpers

Assembly

NDepend.API.dll

Provides a set of extension methods to optimize enumerables operations on set.

public static class ExtensionMethodsSet

Inheritance

object

ExtensionMethodsSet

Inherited Members

object.ToString()

object.Equals(object)

object.Equals(object, object)

object.ReferenceEquals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

Methods (11)

Except<T>(IEnumerable<T>, HashSet<T>)

Produces the set difference of this seq and hashset. This method is an optimized version of Enumerable.Except<T>.

public static IEnumerable<T> Except<T>(this IEnumerable<T> seq, HashSet<T> hashset) where T : class

Parameters

seq IEnumerable<T>

A sequence of elements whose elements that are not also in hashset will be returned.

hashset HashSet<T>

An hashset of elements whose elements that also occur in seq will cause those elements to be removed from the returned sequence.

Returns

IEnumerable<T>

A sequence that contains the set difference of the elements of seq and hashset.

Type Parameters

T

The element type of the elements of the hashset and the sequence.

Remarks

This extension method has a O(seq.Count) time complexity.

Intersect<T>(HashSet<T>, HashSet<T>)

Produces the set of elements, intersection of this hashset and otherHashset. This method is an optimized version of Enumerable.Intersect<T>.

public static IEnumerable<T> Intersect<T>(this HashSet<T> hashset, HashSet<T> otherHashset)

Parameters

hashset HashSet<T>

An hashset of elements whose distinct elements that also appear in otherHashset will be returned.

otherHashset HashSet<T>

An hashset of elements whose distinct elements that also appear in hashset will be returned.

Returns

IEnumerable<T>

A sequence that contains the elements that form the set intersection of both hashsets.

Type Parameters

T

The code element type of the elements of the hashset and the sequence.

Remarks

This extension method has a O(otherHashset.Count) time complexity.

Intersect<T>(HashSet<T>, IEnumerable<T>)

Produces the set of elements, intersection of this hashset and seq. This method is an optimized version of Enumerable.Intersect<T>.

public static IEnumerable<T> Intersect<T>(this HashSet<T> hashset, IEnumerable<T> seq)

Parameters

hashset HashSet<T>

An hashset of elements whose distinct elements that also appear in seq will be returned.

seq IEnumerable<T>

A sequence of elements whose distinct elements that also appear in hashset will be returned.

Returns

IEnumerable<T>

A sequence that contains the elements that form the set intersection of the hashset and the sequence.

Type Parameters

T

The code element type of the elements of the hashset and the sequence.

Remarks

This extension method has a O(seq.Count) time complexity.

Intersect<T>(IEnumerable<T>, HashSet<T>)

Produces the set of elements, intersection of this seq and hashset. This method is an optimized version of Enumerable.Intersect<T>.

public static IEnumerable<T> Intersect<T>(this IEnumerable<T> seq, HashSet<T> hashset)

Parameters

seq IEnumerable<T>

A sequence of elements whose distinct elements that also appear in hashset will be returned.

hashset HashSet<T>

An hashset of elements whose distinct elements that also appear in seq will be returned.

Returns

IEnumerable<T>

A sequence that contains the elements that form the set intersection of the hashset and the sequence.

Type Parameters

T

The code element type of the elements of the hashset and the sequence.

Remarks

This extension method has a O(seq.Count) time complexity.

ToHashSetEx<T>(IEnumerable<T>)

Creates an hashset from a IEnumerable<T>.

public static HashSet<T> ToHashSetEx<T>(this IEnumerable<T> seq)

Parameters

seq IEnumerable<T>

An IEnumerable<T> to create an hashset from.

Returns

HashSet<T>

An hashset that contains the elements from the input sequence.

Type Parameters

T

The type of the elements of seq.

Remarks

This method exists since NDepend v2018.1.1 because the .NET Fx v4.7.2 introduces a ToHashSet() extension method with the same signature as the one in the NDepend.API. As a consequence ambiguous call errors are emitted by the compiler when using ToHashSet() in a .NET fx v4.7.2 (or upper) environment. ToHashSet() can still be used as a static method ExtensionMethodsSet.ToHashSet(...). To avoid any problem, a straightforward solution is to replace "ToHashSet()" with "ToHashSetEx()" in all your .ndproj and .ndrules textual files that contain your code queries and rules.

ToHashSetEx<T>(IEnumerable<T>, IEqualityComparer<T>)

Creates an hashset from a IEnumerable<T>.

public static HashSet<T> ToHashSetEx<T>(this IEnumerable<T> seq, IEqualityComparer<T> equalityComparer)

Parameters

seq IEnumerable<T>

An IEnumerable<T> to create an hashset from.

equalityComparer IEqualityComparer<T>

The equality comparer on elements.

Returns

HashSet<T>

An hashset that contains the elements from the input sequence.

Type Parameters

T

The type of the elements of seq.

Remarks

This method exists since NDepend v2018.1.1 because the .NET Fx v4.7.2 introduces a ToHashSet() extension method with the same signature as the one in the NDepend.API. As a consequence ambiguous call errors are emitted by the compiler when using ToHashSet() in a .NET fx v4.7.2 (or upper) environment. ToHashSet() can still be used as a static method ExtensionMethodsSet.ToHashSet(...). To avoid any problem, a straightforward solution is to replace "ToHashSet()" with "ToHashSetEx()" in all your .ndproj and .ndrules textual files that contain your code queries and rules.

ToHashSet<T>(IEnumerable<T>)

Creates an hashset from a IEnumerable<T>.

[Obsolete("Use ToHashSetEx() extension method instead to avoid conflict with the .NET Fx v4.7.2 ToHashSet() extension method with same signature")]
public static HashSet<T> ToHashSet<T>(this IEnumerable<T> seq)

Parameters

seq IEnumerable<T>

An IEnumerable<T> to create an hashset from.

Returns

HashSet<T>

An hashset that contains the elements from the input sequence.

Type Parameters

T

The type of the elements of seq.

Remarks

The .NET Fx v4.7.2 introduces a ToHashSet() extension method with the same signature. As a consequence this method has been marked as obsolete since NDepend v2018.1.1 and it is advised to use ToHashSetEx<T>(IEnumerable<T>) instead, to avoid ambiguous call error emitted by the compiler.

ToHashSet<T>(IEnumerable<T>, IEqualityComparer<T>)

Creates an hashset from a IEnumerable<T>.

[Obsolete("Use ToHashSetEx() extension method instead to avoid conflict with the .NET Fx v4.7.2 ToHashSet() extension method with same signature")]
public static HashSet<T> ToHashSet<T>(this IEnumerable<T> seq, IEqualityComparer<T> equalityComparer)

Parameters

seq IEnumerable<T>

An IEnumerable<T> to create an hashset from.

equalityComparer IEqualityComparer<T>

The equality comparer on elements.

Returns

HashSet<T>

An hashset that contains the elements from the input sequence.

Type Parameters

T

The type of the elements of seq.

Remarks

The .NET Fx v4.7.2 introduces a ToHashSet() extension method with the same signature. As a consequence this method has been marked as obsolete since NDepend v2018.1.1 and it is advised to use ToHashSetEx<T>(IEnumerable<T>, IEqualityComparer<T>) instead, to avoid ambiguous call error emitted by the compiler.

Union<T>(HashSet<T>, HashSet<T>)

Produces the set of elements, union of this thisHashset and otherHashset. This method is an optimized version of Enumerable.Union<T>.

public static IEnumerable<T> Union<T>(this HashSet<T> thisHashset, HashSet<T> otherHashset)

Parameters

thisHashset HashSet<T>

A sequence of elements whose distinct elements form the first set for the union.

otherHashset HashSet<T>

An hashset of elements whose distinct elements form the second set for the union.

Returns

IEnumerable<T>

A sequence that contains the elements that form the set union of both hashsets, excluding duplicates.

Type Parameters

T

The code element type of the elements of the hashset and the sequence.

Remarks

This extension method has a O(otherHashset.Count) time complexity.

Union<T>(HashSet<T>, IEnumerable<T>)

Produces the set of elements, union of this hashset and seq. This method is an optimized version of Enumerable.Union<T>.

public static IEnumerable<T> Union<T>(this HashSet<T> hashset, IEnumerable<T> seq)

Parameters

hashset HashSet<T>

An hashset of elements whose distinct elements form the first set for the union.

seq IEnumerable<T>

A sequence of elements whose distinct elements form the second set for the union.

Returns

IEnumerable<T>

A sequence that contains the elements that form the set union of the hashset and the sequence, excluding duplicates.

Type Parameters

T

The code element type of the elements of the hashset and the sequence.

Remarks

This extension method has a O(seq.Count) time complexity.

Union<T>(IEnumerable<T>, HashSet<T>)

Produces the set of elements, union of this seq and hashset. This method is an optimized version of Enumerable.Union<T>.

public static IEnumerable<T> Union<T>(this IEnumerable<T> seq, HashSet<T> hashset)

Parameters

seq IEnumerable<T>

A sequence of elements whose distinct elements form the second set for the union.

hashset HashSet<T>

An hashset of elements whose distinct elements form the first set for the union.

Returns

IEnumerable<T>

A sequence that contains the elements that form the set union of the sequence and the hashset, excluding duplicates.

Type Parameters

T

The code element type of the elements of the hashset and the sequence.

Remarks

This extension method has a O(seq.Count) time complexity.