Class Predicates

Namespace

Garyon.Functions

Assembly

Garyon.dll

Contains functions that can be used as predicates in functions that filter collections. Using these functions is advised over lambdas, as lambdas create a new delegate instance, effectively reducing performance.

public static class Predicates

Inheritance

object

Predicates

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Methods

DoesNotHaveValue<T>(T?)

Determines whether the provided nullable struct object does not have a value.

public static bool DoesNotHaveValue<T>(T? element) where T : struct

Parameters

element T?

The nullable struct object.

Returns

bool

The value opposite to HasValue for the provided object.

Type Parameters

T

The type of the struct.

False<T>(T)

Always returns false.

public static bool False<T>(T _)

Parameters

_ T

The element.

Returns

bool

Always false.

Type Parameters

T

The type of the element.

HasValue<T>(T?)

Determines whether the provided nullable struct object has a value.

public static bool HasValue<T>(T? element) where T : struct

Parameters

element T?

The nullable struct object.

Returns

bool

The value equal to HasValue for the provided object.

Type Parameters

T

The type of the struct.

NotEmpty(string?)

Determines whether the provided string is neither null nor empty.

public static bool NotEmpty(string? s)

Parameters

s string

The string.

Returns

bool

true when s is not null and has a non-zero length; otherwise false.

Remarks

Equivalent to !string.IsNullOrEmpty(s).

NotEmptyOrWhitespace(string?)

Determines whether the provided string is neither null, empty, nor consists exclusively of whitespace.

public static bool NotEmptyOrWhitespace(string? s)

Parameters

s string

The string.

Returns

bool

true when s is not null, not empty, and contains at least one non-whitespace character; otherwise false.

Remarks

Equivalent to !string.IsNullOrWhiteSpace(s).

NotNull<T>(T)

Determines whether the provided element is not null.

public static bool NotNull<T>(T element)

Parameters

element T

The element.

Returns

bool

true if the element is not null, otherwise false.

Type Parameters

T

The type of the element.

Remarks

For nullable structs, consider using HasValue<T>(T?).

Null<T>(T)

Determines whether the provided element is null.

public static bool Null<T>(T element)

Parameters

element T

The element.

Returns

bool

true if the element is null, otherwise false.

Type Parameters

T

The type of the element.

Remarks

For nullable structs, consider using DoesNotHaveValue<T>(T?).

True<T>(T)

Always returns true.

public static bool True<T>(T _)

Parameters

_ T

The element.

Returns

bool

Always true.

Type Parameters

T

The type of the element.