Array.FindLastIndex Método

Definición

Espacio de nombres:: System

Ensamblados:: System.Runtime.dll, mscorlib.dll, netstandard.dll

Busca un elemento que cumpla las condiciones definidas por el predicado especificado y devuelve el índice de base cero de la última aparición en un objeto Array o en una parte del mismo.Searches for an element that matches the conditions defined by a specified predicate, and returns the zero-based index of the last occurrence within an Array or a portion of it.

Sobrecargas

FindLastIndex<T>(T[], Predicate<T>)	Busca un elemento que coincida con las condiciones definidas por el predicado especificado y devuelve el índice de base cero de la última aparición en toda la matriz Array.Searches for an element that matches the conditions defined by the specified predicate, and returns the zero-based index of the last occurrence within the entire Array.
FindLastIndex<T>(T[], Int32, Predicate<T>)	Busca un elemento que coincida con las condiciones definidas por el predicado especificado y devuelve el índice de base cero de la última aparición en el intervalo de elementos de la matriz Array que va desde el primer elemento hasta el índice especificado.Searches for an element that matches the conditions defined by the specified predicate, and returns the zero-based index of the last occurrence within the range of elements in the Array that extends from the first element to the specified index.
FindLastIndex<T>(T[], Int32, Int32, Predicate<T>)	Busca un elemento que coincida con las condiciones definidas por el predicado especificado y devuelve el índice de base cero de la última aparición en el intervalo de elementos de la matriz Array que contiene el número especificado de elementos y termina en el índice especificado.Searches for an element that matches the conditions defined by the specified predicate, and returns the zero-based index of the last occurrence within the range of elements in the Array that contains the specified number of elements and ends at the specified index.

FindLastIndex<T>(T[], Predicate<T>)

Busca un elemento que coincida con las condiciones definidas por el predicado especificado y devuelve el índice de base cero de la última aparición en toda la matriz Array.Searches for an element that matches the conditions defined by the specified predicate, and returns the zero-based index of the last occurrence within the entire Array.

public:
generic <typename T>
 static int FindLastIndex(cli::array <T> ^ array, Predicate<T> ^ match);

public static int FindLastIndex<T> (T[] array, Predicate<T> match);

static member FindLastIndex : 'T[] * Predicate<'T> -> int

Public Shared Function FindLastIndex(Of T) (array As T(), match As Predicate(Of T)) As Integer

Parámetros de tipo

T

Tipo de los elementos de la matriz.The type of the elements of the array.

Parámetros

array: T[]

Array unidimensional de base cero en la que se realizará la búsqueda.The one-dimensional, zero-based Array to search.

match: Predicate<T>

Predicate<T> que define las condiciones del elemento que se va a buscar.The Predicate<T> that defines the conditions of the element to search for.

Devoluciones

Int32

Índice de base cero de la última aparición de un elemento que coincide con las condiciones definidas por match, si se encuentra; en caso contrario, -1.The zero-based index of the last occurrence of an element that matches the conditions defined by match, if found; otherwise, -1.

Excepciones

ArgumentNullException

array es null.array is null.

o bien-or- match es null.match is null.

Ejemplos

En el ejemplo de código siguiente se muestran las tres sobrecargas del método genérico FindLastIndex.The following code example demonstrates all three overloads of the FindLastIndex generic method. Se crea una matriz de cadenas que contiene 8 nombres de dinosaurio, dos de los cuales (en las posiciones 1 y 5) terminan con "Saurus".An array of strings is created, containing 8 dinosaur names, two of which (at positions 1 and 5) end with "saurus". En el ejemplo de código también se define un método de predicado de búsqueda denominado EndsWithSaurus, que acepta un parámetro de cadena y devuelve un valor booleano que indica si la cadena de entrada termina en "Saurus".The code example also defines a search predicate method named EndsWithSaurus, which accepts a string parameter and returns a Boolean value indicating whether the input string ends in "saurus".

La sobrecarga del método FindLastIndex<T>(T[], Predicate<T>) recorre la matriz hacia atrás desde el final, pasando cada elemento a su vez al método EndsWithSaurus.The FindLastIndex<T>(T[], Predicate<T>) method overload traverses the array backward from the end, passing each element in turn to the EndsWithSaurus method. La búsqueda se detiene cuando el método EndsWithSaurus devuelve true para el elemento en la posición 5.The search stops when the EndsWithSaurus method returns true for the element at position 5.

Nota

En C# y Visual Basic, no es necesario crear explícitamente el delegado de Predicate<string> (Predicate(Of String) en Visual Basic).In C# and Visual Basic, it is not necessary to create the Predicate<string> delegate (Predicate(Of String) in Visual Basic) explicitly. Estos lenguajes deducen el delegado correcto del contexto y lo crean automáticamente.These languages infer the correct delegate from context and create it automatically.

La sobrecarga del método FindLastIndex<T>(T[], Int32, Predicate<T>) se utiliza para buscar en la matriz a partir de la posición 4 y continuar hacia atrás hasta el principio de la matriz.The FindLastIndex<T>(T[], Int32, Predicate<T>) method overload is used to search the array beginning at position 4 and continuing backward to the beginning of the array. Busca el elemento en la posición 1.It finds the element at position 1. Por último, se utiliza la sobrecarga del método FindLastIndex<T>(T[], Int32, Int32, Predicate<T>) para buscar en el intervalo de tres elementos a partir de la posición 4 y trabajar hacia atrás (es decir, los elementos 4, 3 y 2).Finally, the FindLastIndex<T>(T[], Int32, Int32, Predicate<T>) method overload is used to search the range of three elements beginning at position 4 and working backward (that is, elements 4, 3, and 2). Devuelve-1 porque no hay ningún nombre de dinosaurio en ese intervalo que termine en "Saurus".It returns -1 because there are no dinosaur names in that range that end with "saurus".

using namespace System;

// Search predicate returns true if a string ends in "saurus".
bool EndsWithSaurus(String^ s)
{
    if ((s->Length > 5) && 
        (s->Substring(s->Length - 6)->ToLower() == "saurus"))
    {
        return true;
    }
    else
    {
        return false;
    }
};

void main()
{
    array<String^>^ dinosaurs = { "Compsognathus", 
        "Amargasaurus",   "Oviraptor",      "Velociraptor", 
        "Deinonychus",    "Dilophosaurus",  "Gallimimus", 
        "Triceratops" };

    Console::WriteLine();
    for each(String^ dinosaur in dinosaurs )
    {
        Console::WriteLine(dinosaur);
    }

    Console::WriteLine("\nArray::FindLastIndex(dinosaurs, EndsWithSaurus): {0}", 
        Array::FindLastIndex(dinosaurs, gcnew Predicate<String^>(EndsWithSaurus)));

    Console::WriteLine("\nArray::FindLastIndex(dinosaurs, 4, EndsWithSaurus): {0}",
        Array::FindLastIndex(dinosaurs, 4, gcnew Predicate<String^>(EndsWithSaurus)));

    Console::WriteLine("\nArray::FindLastIndex(dinosaurs, 4, 3, EndsWithSaurus): {0}",
        Array::FindLastIndex(dinosaurs, 4, 3, gcnew Predicate<String^>(EndsWithSaurus)));
}

/* This code example produces the following output:

Compsognathus
Amargasaurus
Oviraptor
Velociraptor
Deinonychus
Dilophosaurus
Gallimimus
Triceratops

Array::FindLastIndex(dinosaurs, EndsWithSaurus): 5

Array::FindLastIndex(dinosaurs, 4, EndsWithSaurus): 1

Array::FindLastIndex(dinosaurs, 4, 3, EndsWithSaurus): -1
 */

using System;

public class Example
{
    public static void Main()
    {
        string[] dinosaurs = { "Compsognathus", 
            "Amargasaurus",   "Oviraptor",      "Velociraptor", 
            "Deinonychus",    "Dilophosaurus",  "Gallimimus", 
            "Triceratops" };

        Console.WriteLine();
        foreach(string dinosaur in dinosaurs)
        {
            Console.WriteLine(dinosaur);
        }

        Console.WriteLine(
            "\nArray.FindLastIndex(dinosaurs, EndsWithSaurus): {0}", 
            Array.FindLastIndex(dinosaurs, EndsWithSaurus));

        Console.WriteLine(
            "\nArray.FindLastIndex(dinosaurs, 4, EndsWithSaurus): {0}",
            Array.FindLastIndex(dinosaurs, 4, EndsWithSaurus));

        Console.WriteLine(
            "\nArray.FindLastIndex(dinosaurs, 4, 3, EndsWithSaurus): {0}",
            Array.FindLastIndex(dinosaurs, 4, 3, EndsWithSaurus));
    }

    // Search predicate returns true if a string ends in "saurus".
    private static bool EndsWithSaurus(String s)
    {
        if ((s.Length > 5) && 
            (s.Substring(s.Length - 6).ToLower() == "saurus"))
        {
            return true;
        }
        else
        {
            return false;
        }
    }
}

/* This code example produces the following output:

Compsognathus
Amargasaurus
Oviraptor
Velociraptor
Deinonychus
Dilophosaurus
Gallimimus
Triceratops

Array.FindLastIndex(dinosaurs, EndsWithSaurus): 5

Array.FindLastIndex(dinosaurs, 4, EndsWithSaurus): 1

Array.FindLastIndex(dinosaurs, 4, 3, EndsWithSaurus): -1
 */

Public Class Example

    Public Shared Sub Main()

        Dim dinosaurs() As String = { "Compsognathus", _
            "Amargasaurus",   "Oviraptor",      "Velociraptor", _
            "Deinonychus",    "Dilophosaurus",  "Gallimimus", _
            "Triceratops" }

        Console.WriteLine()
        For Each dinosaur As String In dinosaurs
            Console.WriteLine(dinosaur)
        Next

        Console.WriteLine(vbLf & _
            "Array.FindLastIndex(dinosaurs, AddressOf EndsWithSaurus): {0}", _
            Array.FindLastIndex(dinosaurs, AddressOf EndsWithSaurus))

        Console.WriteLine(vbLf & _
            "Array.FindLastIndex(dinosaurs, 4, AddressOf EndsWithSaurus): {0}", _
            Array.FindLastIndex(dinosaurs, 4, AddressOf EndsWithSaurus))

        Console.WriteLine(vbLf & _
            "Array.FindLastIndex(dinosaurs, 4, 3, AddressOf EndsWithSaurus): {0}", _
            Array.FindLastIndex(dinosaurs, 4, 3, AddressOf EndsWithSaurus))

    End Sub

    ' Search predicate returns true if a string ends in "saurus".
    Private Shared Function EndsWithSaurus(ByVal s As String) _
        As Boolean

        ' AndAlso prevents evaluation of the second Boolean
        ' expression if the string is so short that an error
        ' would occur.
        If (s.Length > 5) AndAlso _
            (s.Substring(s.Length - 6).ToLower() = "saurus") Then
            Return True
        Else
            Return False
        End If
    End Function
End Class

' This code example produces the following output:
'
'Compsognathus
'Amargasaurus
'Oviraptor
'Velociraptor
'Deinonychus
'Dilophosaurus
'Gallimimus
'Triceratops
'
'Array.FindLastIndex(dinosaurs, AddressOf EndsWithSaurus): 5
'
'Array.FindLastIndex(dinosaurs, 4, AddressOf EndsWithSaurus): 1
'
'Array.FindLastIndex(dinosaurs, 4, 3, AddressOf EndsWithSaurus): -1

Comentarios

El Array se busca hacia atrás empezando en el último elemento y terminando en el primer elemento.The Array is searched backward starting at the last element and ending at the first element.

El Predicate<T> es un delegado de un método que devuelve true si el objeto que se pasa a él coincide con las condiciones definidas en el delegado.The Predicate<T> is a delegate to a method that returns true if the object passed to it matches the conditions defined in the delegate. Los elementos de array se pasan individualmente a la Predicate<T>.The elements of array are individually passed to the Predicate<T>.

Este método es una operación O (n), donde n es el Length de array.This method is an O(n) operation, where n is the Length of array.

Consulte también:

FindLastIndex<T>(T[], Int32, Predicate<T>)

Busca un elemento que coincida con las condiciones definidas por el predicado especificado y devuelve el índice de base cero de la última aparición en el intervalo de elementos de la matriz Array que va desde el primer elemento hasta el índice especificado.Searches for an element that matches the conditions defined by the specified predicate, and returns the zero-based index of the last occurrence within the range of elements in the Array that extends from the first element to the specified index.

public:
generic <typename T>
 static int FindLastIndex(cli::array <T> ^ array, int startIndex, Predicate<T> ^ match);

public static int FindLastIndex<T> (T[] array, int startIndex, Predicate<T> match);

static member FindLastIndex : 'T[] * int * Predicate<'T> -> int

Public Shared Function FindLastIndex(Of T) (array As T(), startIndex As Integer, match As Predicate(Of T)) As Integer

Parámetros de tipo

T

Tipo de los elementos de la matriz.The type of the elements of the array.

Parámetros

array: T[]

Array unidimensional de base cero en la que se realizará la búsqueda.The one-dimensional, zero-based Array to search.

startIndex: Int32

Índice inicial de base cero de la búsqueda hacia atrás.The zero-based starting index of the backward search.

match: Predicate<T>

Predicate<T> que define las condiciones del elemento que se va a buscar.The Predicate<T> that defines the conditions of the element to search for.

Devoluciones

Int32

Excepciones

ArgumentNullException

array es null.array is null.

o bien-or- match es null.match is null.

ArgumentOutOfRangeException

startIndex está fuera del intervalo de índices válidos para la array.startIndex is outside the range of valid indexes for array.

Ejemplos

Nota

using namespace System;

// Search predicate returns true if a string ends in "saurus".
bool EndsWithSaurus(String^ s)
{
    if ((s->Length > 5) && 
        (s->Substring(s->Length - 6)->ToLower() == "saurus"))
    {
        return true;
    }
    else
    {
        return false;
    }
};

void main()
{
    array<String^>^ dinosaurs = { "Compsognathus", 
        "Amargasaurus",   "Oviraptor",      "Velociraptor", 
        "Deinonychus",    "Dilophosaurus",  "Gallimimus", 
        "Triceratops" };

    Console::WriteLine();
    for each(String^ dinosaur in dinosaurs )
    {
        Console::WriteLine(dinosaur);
    }

    Console::WriteLine("\nArray::FindLastIndex(dinosaurs, EndsWithSaurus): {0}", 
        Array::FindLastIndex(dinosaurs, gcnew Predicate<String^>(EndsWithSaurus)));

    Console::WriteLine("\nArray::FindLastIndex(dinosaurs, 4, EndsWithSaurus): {0}",
        Array::FindLastIndex(dinosaurs, 4, gcnew Predicate<String^>(EndsWithSaurus)));

    Console::WriteLine("\nArray::FindLastIndex(dinosaurs, 4, 3, EndsWithSaurus): {0}",
        Array::FindLastIndex(dinosaurs, 4, 3, gcnew Predicate<String^>(EndsWithSaurus)));
}

/* This code example produces the following output:

Compsognathus
Amargasaurus
Oviraptor
Velociraptor
Deinonychus
Dilophosaurus
Gallimimus
Triceratops

Array::FindLastIndex(dinosaurs, EndsWithSaurus): 5

Array::FindLastIndex(dinosaurs, 4, EndsWithSaurus): 1

Array::FindLastIndex(dinosaurs, 4, 3, EndsWithSaurus): -1
 */

using System;

public class Example
{
    public static void Main()
    {
        string[] dinosaurs = { "Compsognathus", 
            "Amargasaurus",   "Oviraptor",      "Velociraptor", 
            "Deinonychus",    "Dilophosaurus",  "Gallimimus", 
            "Triceratops" };

        Console.WriteLine();
        foreach(string dinosaur in dinosaurs)
        {
            Console.WriteLine(dinosaur);
        }

        Console.WriteLine(
            "\nArray.FindLastIndex(dinosaurs, EndsWithSaurus): {0}", 
            Array.FindLastIndex(dinosaurs, EndsWithSaurus));

        Console.WriteLine(
            "\nArray.FindLastIndex(dinosaurs, 4, EndsWithSaurus): {0}",
            Array.FindLastIndex(dinosaurs, 4, EndsWithSaurus));

        Console.WriteLine(
            "\nArray.FindLastIndex(dinosaurs, 4, 3, EndsWithSaurus): {0}",
            Array.FindLastIndex(dinosaurs, 4, 3, EndsWithSaurus));
    }

    // Search predicate returns true if a string ends in "saurus".
    private static bool EndsWithSaurus(String s)
    {
        if ((s.Length > 5) && 
            (s.Substring(s.Length - 6).ToLower() == "saurus"))
        {
            return true;
        }
        else
        {
            return false;
        }
    }
}

/* This code example produces the following output:

Compsognathus
Amargasaurus
Oviraptor
Velociraptor
Deinonychus
Dilophosaurus
Gallimimus
Triceratops

Array.FindLastIndex(dinosaurs, EndsWithSaurus): 5

Array.FindLastIndex(dinosaurs, 4, EndsWithSaurus): 1

Array.FindLastIndex(dinosaurs, 4, 3, EndsWithSaurus): -1
 */

Public Class Example

    Public Shared Sub Main()

        Dim dinosaurs() As String = { "Compsognathus", _
            "Amargasaurus",   "Oviraptor",      "Velociraptor", _
            "Deinonychus",    "Dilophosaurus",  "Gallimimus", _
            "Triceratops" }

        Console.WriteLine()
        For Each dinosaur As String In dinosaurs
            Console.WriteLine(dinosaur)
        Next

        Console.WriteLine(vbLf & _
            "Array.FindLastIndex(dinosaurs, AddressOf EndsWithSaurus): {0}", _
            Array.FindLastIndex(dinosaurs, AddressOf EndsWithSaurus))

        Console.WriteLine(vbLf & _
            "Array.FindLastIndex(dinosaurs, 4, AddressOf EndsWithSaurus): {0}", _
            Array.FindLastIndex(dinosaurs, 4, AddressOf EndsWithSaurus))

        Console.WriteLine(vbLf & _
            "Array.FindLastIndex(dinosaurs, 4, 3, AddressOf EndsWithSaurus): {0}", _
            Array.FindLastIndex(dinosaurs, 4, 3, AddressOf EndsWithSaurus))

    End Sub

    ' Search predicate returns true if a string ends in "saurus".
    Private Shared Function EndsWithSaurus(ByVal s As String) _
        As Boolean

        ' AndAlso prevents evaluation of the second Boolean
        ' expression if the string is so short that an error
        ' would occur.
        If (s.Length > 5) AndAlso _
            (s.Substring(s.Length - 6).ToLower() = "saurus") Then
            Return True
        Else
            Return False
        End If
    End Function
End Class

' This code example produces the following output:
'
'Compsognathus
'Amargasaurus
'Oviraptor
'Velociraptor
'Deinonychus
'Dilophosaurus
'Gallimimus
'Triceratops
'
'Array.FindLastIndex(dinosaurs, AddressOf EndsWithSaurus): 5
'
'Array.FindLastIndex(dinosaurs, 4, AddressOf EndsWithSaurus): 1
'
'Array.FindLastIndex(dinosaurs, 4, 3, AddressOf EndsWithSaurus): -1

Comentarios

El Array se busca hacia atrás empezando en startIndex y terminando en el primer elemento.The Array is searched backward starting at startIndex and ending at the first element.

Este método es una operación O (n), donde n es el número de elementos desde el principio de array a startIndex.This method is an O(n) operation, where n is the number of elements from the beginning of array to startIndex.

Consulte también:

FindLastIndex<T>(T[], Int32, Int32, Predicate<T>)

Busca un elemento que coincida con las condiciones definidas por el predicado especificado y devuelve el índice de base cero de la última aparición en el intervalo de elementos de la matriz Array que contiene el número especificado de elementos y termina en el índice especificado.Searches for an element that matches the conditions defined by the specified predicate, and returns the zero-based index of the last occurrence within the range of elements in the Array that contains the specified number of elements and ends at the specified index.

public:
generic <typename T>
 static int FindLastIndex(cli::array <T> ^ array, int startIndex, int count, Predicate<T> ^ match);

public static int FindLastIndex<T> (T[] array, int startIndex, int count, Predicate<T> match);

static member FindLastIndex : 'T[] * int * int * Predicate<'T> -> int

Public Shared Function FindLastIndex(Of T) (array As T(), startIndex As Integer, count As Integer, match As Predicate(Of T)) As Integer

Parámetros de tipo

T

Tipo de los elementos de la matriz.The type of the elements of the array.

Parámetros

array: T[]

Array unidimensional de base cero en la que se realizará la búsqueda.The one-dimensional, zero-based Array to search.

startIndex: Int32

Índice inicial de base cero de la búsqueda hacia atrás.The zero-based starting index of the backward search.

count: Int32

Número de elementos de la sección en la que se va a realizar la búsqueda.The number of elements in the section to search.

match: Predicate<T>

Predicate<T> que define las condiciones del elemento que se va a buscar.The Predicate<T> that defines the conditions of the element to search for.

Devoluciones

Int32

Excepciones

ArgumentNullException

array es null.array is null.

o bien-or- match es null.match is null.

ArgumentOutOfRangeException

startIndex está fuera del intervalo de índices válidos para la array.startIndex is outside the range of valid indexes for array.

o bien-or- count es menor que cero.count is less than zero.

o bien-or- startIndex y count no especifican una sección válida en array.startIndex and count do not specify a valid section in array.

Ejemplos

Nota

using namespace System;

// Search predicate returns true if a string ends in "saurus".
bool EndsWithSaurus(String^ s)
{
    if ((s->Length > 5) && 
        (s->Substring(s->Length - 6)->ToLower() == "saurus"))
    {
        return true;
    }
    else
    {
        return false;
    }
};

void main()
{
    array<String^>^ dinosaurs = { "Compsognathus", 
        "Amargasaurus",   "Oviraptor",      "Velociraptor", 
        "Deinonychus",    "Dilophosaurus",  "Gallimimus", 
        "Triceratops" };

    Console::WriteLine();
    for each(String^ dinosaur in dinosaurs )
    {
        Console::WriteLine(dinosaur);
    }

    Console::WriteLine("\nArray::FindLastIndex(dinosaurs, EndsWithSaurus): {0}", 
        Array::FindLastIndex(dinosaurs, gcnew Predicate<String^>(EndsWithSaurus)));

    Console::WriteLine("\nArray::FindLastIndex(dinosaurs, 4, EndsWithSaurus): {0}",
        Array::FindLastIndex(dinosaurs, 4, gcnew Predicate<String^>(EndsWithSaurus)));

    Console::WriteLine("\nArray::FindLastIndex(dinosaurs, 4, 3, EndsWithSaurus): {0}",
        Array::FindLastIndex(dinosaurs, 4, 3, gcnew Predicate<String^>(EndsWithSaurus)));
}

/* This code example produces the following output:

Compsognathus
Amargasaurus
Oviraptor
Velociraptor
Deinonychus
Dilophosaurus
Gallimimus
Triceratops

Array::FindLastIndex(dinosaurs, EndsWithSaurus): 5

Array::FindLastIndex(dinosaurs, 4, EndsWithSaurus): 1

Array::FindLastIndex(dinosaurs, 4, 3, EndsWithSaurus): -1
 */

using System;

public class Example
{
    public static void Main()
    {
        string[] dinosaurs = { "Compsognathus", 
            "Amargasaurus",   "Oviraptor",      "Velociraptor", 
            "Deinonychus",    "Dilophosaurus",  "Gallimimus", 
            "Triceratops" };

        Console.WriteLine();
        foreach(string dinosaur in dinosaurs)
        {
            Console.WriteLine(dinosaur);
        }

        Console.WriteLine(
            "\nArray.FindLastIndex(dinosaurs, EndsWithSaurus): {0}", 
            Array.FindLastIndex(dinosaurs, EndsWithSaurus));

        Console.WriteLine(
            "\nArray.FindLastIndex(dinosaurs, 4, EndsWithSaurus): {0}",
            Array.FindLastIndex(dinosaurs, 4, EndsWithSaurus));

        Console.WriteLine(
            "\nArray.FindLastIndex(dinosaurs, 4, 3, EndsWithSaurus): {0}",
            Array.FindLastIndex(dinosaurs, 4, 3, EndsWithSaurus));
    }

    // Search predicate returns true if a string ends in "saurus".
    private static bool EndsWithSaurus(String s)
    {
        if ((s.Length > 5) && 
            (s.Substring(s.Length - 6).ToLower() == "saurus"))
        {
            return true;
        }
        else
        {
            return false;
        }
    }
}

/* This code example produces the following output:

Compsognathus
Amargasaurus
Oviraptor
Velociraptor
Deinonychus
Dilophosaurus
Gallimimus
Triceratops

Array.FindLastIndex(dinosaurs, EndsWithSaurus): 5

Array.FindLastIndex(dinosaurs, 4, EndsWithSaurus): 1

Array.FindLastIndex(dinosaurs, 4, 3, EndsWithSaurus): -1
 */

Public Class Example

    Public Shared Sub Main()

        Dim dinosaurs() As String = { "Compsognathus", _
            "Amargasaurus",   "Oviraptor",      "Velociraptor", _
            "Deinonychus",    "Dilophosaurus",  "Gallimimus", _
            "Triceratops" }

        Console.WriteLine()
        For Each dinosaur As String In dinosaurs
            Console.WriteLine(dinosaur)
        Next

        Console.WriteLine(vbLf & _
            "Array.FindLastIndex(dinosaurs, AddressOf EndsWithSaurus): {0}", _
            Array.FindLastIndex(dinosaurs, AddressOf EndsWithSaurus))

        Console.WriteLine(vbLf & _
            "Array.FindLastIndex(dinosaurs, 4, AddressOf EndsWithSaurus): {0}", _
            Array.FindLastIndex(dinosaurs, 4, AddressOf EndsWithSaurus))

        Console.WriteLine(vbLf & _
            "Array.FindLastIndex(dinosaurs, 4, 3, AddressOf EndsWithSaurus): {0}", _
            Array.FindLastIndex(dinosaurs, 4, 3, AddressOf EndsWithSaurus))

    End Sub

    ' Search predicate returns true if a string ends in "saurus".
    Private Shared Function EndsWithSaurus(ByVal s As String) _
        As Boolean

        ' AndAlso prevents evaluation of the second Boolean
        ' expression if the string is so short that an error
        ' would occur.
        If (s.Length > 5) AndAlso _
            (s.Substring(s.Length - 6).ToLower() = "saurus") Then
            Return True
        Else
            Return False
        End If
    End Function
End Class

' This code example produces the following output:
'
'Compsognathus
'Amargasaurus
'Oviraptor
'Velociraptor
'Deinonychus
'Dilophosaurus
'Gallimimus
'Triceratops
'
'Array.FindLastIndex(dinosaurs, AddressOf EndsWithSaurus): 5
'
'Array.FindLastIndex(dinosaurs, 4, AddressOf EndsWithSaurus): 1
'
'Array.FindLastIndex(dinosaurs, 4, 3, AddressOf EndsWithSaurus): -1

Comentarios

El Array se busca hacia atrás a partir de startIndex y termina en startIndex menos count más 1, si count es mayor que 0.The Array is searched backward starting at startIndex and ending at startIndex minus count plus 1, if count is greater than 0.

Este método es una operación O (n), donde se count``n.This method is an O(n) operation, where n is count.

Array.FindLastIndex Método

Definición

Sobrecargas

FindLastIndex<T>(T[], Predicate<T>)

Parámetros de tipo

Parámetros

Devoluciones

Excepciones

Ejemplos

Comentarios

Consulte también:

FindLastIndex<T>(T[], Int32, Predicate<T>)

Parámetros de tipo

Parámetros

Devoluciones

Excepciones

Ejemplos

Comentarios

Consulte también:

FindLastIndex<T>(T[], Int32, Int32, Predicate<T>)

Parámetros de tipo

Parámetros

Devoluciones

Excepciones

Ejemplos

Comentarios

Consulte también:

Se aplica a

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