本文整理匯總了VB.NET中System.Array.FindAll<T>方法的典型用法代碼示例。如果您正苦於以下問題:VB.NET Array.FindAll<T>方法的具體用法?VB.NET Array.FindAll<T>怎麽用?VB.NET Array.FindAll<T>使用的例子?那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類System.Array
的用法示例。
在下文中一共展示了Array.FindAll<T>方法的2個代碼示例,這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚,您的評價將有助於係統推薦出更棒的VB.NET代碼示例。
示例1: Example
' 導入命名空間
Imports System.Collections.Generic
Module Example
Public Sub Main()
' Get an array of n random integers.
Dim values() As Integer = GetArray(50, 0, 1000)
Dim lBound As Integer = 300
Dim uBound As Integer = 600
Dim matchedItems() As Integer = Array.FindAll(values,
Function(x) x >= lBound And x <= uBound)
For ctr As Integer = 0 To matchedItems.Length - 1
Console.Write("{0} ", matchedItems(ctr))
If (ctr + 1) Mod 12 = 0 Then Console.WriteLine()
Next
End Sub
Private Function GetArray(n As Integer, lower As Integer,
upper As Integer) As Integer()
Dim rnd As New Random()
Dim list As New List(Of Integer)
For ctr As Integer = 1 To n
list.Add(rnd.Next(lower, upper + 1))
Next
Return list.ToArray()
End Function
End Module
輸出:
542 398 356 351 348 301 562 599 575 400 569 306 535 416 393 385
示例2: DinoDiscoverySet
Public Class DinoDiscoverySet
Public Shared Sub Main()
Dim dinosaurs() As String = { "Compsognathus", _
"Amargasaurus", "Oviraptor", "Velociraptor", _
"Deinonychus", "Dilophosaurus", "Gallimimus", _
"Triceratops" }
Dim GoMesozoic As New DinoDiscoverySet(dinosaurs)
GoMesozoic.DiscoverAll()
GoMesozoic.DiscoverByEnding("saurus")
End Sub
Private dinosaurs As String()
Public Sub New(items() As String)
dinosaurs = items
End Sub
Public Sub DiscoverAll()
Console.WriteLine()
For Each dinosaur As String In dinosaurs
Console.WriteLine(dinosaur)
Next dinosaur
End Sub
Public Sub DiscoverByEnding(Ending As String)
Dim dinoType As Predicate(Of String)
Select Case Ending.ToLower()
Case "raptor"
dinoType = AddressOf EndsWithRaptor
Case "tops"
dinoType = AddressOf EndsWithTops
Case "saurus"
dinoType = AddressOf EndsWithSaurus
Case Else
dinoType = AddressOf EndsWithSaurus
End Select
Console.WriteLine(vbNewLine + _
"Array.Exists(dinosaurs, ""{0}""): {1}", _
Ending, _
Array.Exists(dinosaurs, dinoType))
Console.WriteLine(vbNewLine + _
"Array.TrueForAll(dinosaurs, ""{0}""): {1}", _
Ending, _
Array.TrueForAll(dinosaurs, dinoType))
Console.WriteLine(vbNewLine + _
"Array.Find(dinosaurs, ""{0}""): {1}", _
Ending, _
Array.Find(dinosaurs, dinoType))
Console.WriteLine(vbNewLine + _
"Array.FindLast(dinosaurs, ""{0}""): {1}", _
Ending, _
Array.FindLast(dinosaurs, dinoType))
Console.WriteLine(vbNewLine + _
"Array.FindAll(dinosaurs, ""{0}""):", Ending)
Dim subArray() As String = _
Array.FindAll(dinosaurs, dinoType)
For Each dinosaur As String In subArray
Console.WriteLine(dinosaur)
Next dinosaur
End Sub
' Search predicate returns true if a string ends in "saurus".
Private Function EndsWithSaurus(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.ToLower().EndsWith("saurus")) Then
Return True
Else
Return False
End If
End Function
' Search predicate returns true if a string ends in "raptor".
Private Function EndsWithRaptor(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.ToLower().EndsWith("raptor")) Then
Return True
Else
Return False
End If
End Function
' Search predicate returns true if a string ends in "tops".
Private Function EndsWithTops(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 > 3) AndAlso _
(s.ToLower().EndsWith("tops")) Then
Return True
Else
Return False
End If
End Function
End Class
輸出:
Compsognathus Amargasaurus Oviraptor Velociraptor Deinonychus Dilophosaurus Gallimimus Triceratops Array.Exists(dinosaurs, "saurus"): True Array.TrueForAll(dinosaurs, "saurus"): False Array.Find(dinosaurs, "saurus"): Amargasaurus Array.FindLast(dinosaurs, "saurus"): Dilophosaurus Array.FindAll(dinosaurs, "saurus"): Amargasaurus Dilophosaurus