VB.NET ArrayList.BinarySearch方法代码示例

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本文整理汇总了VB.NET中System.Collections.ArrayList.BinarySearch方法的典型用法代码示例。如果您正苦于以下问题：VB.NET ArrayList.BinarySearch方法的具体用法？VB.NET ArrayList.BinarySearch怎么用？VB.NET ArrayList.BinarySearch使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Collections.ArrayList的用法示例。

在下文中一共展示了ArrayList.BinarySearch方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的VB.NET代码示例。

示例1: Main

' 导入命名空间
Imports System.Collections

Public Class SamplesArrayList    
    
    Public Shared Sub Main()
        
        ' Creates and initializes a new ArrayList. BinarySearch requires
        ' a sorted ArrayList.
        Dim myAL As New ArrayList()
        Dim i As Integer
        For i = 0 To 4
            myAL.Add(i * 2)
        Next i 

        ' Displays the ArrayList.
        Console.WriteLine("The Int32 ArrayList contains the following:")
        PrintValues(myAL)
        
        ' Locates a specific object that does not exist in the ArrayList.
        Dim myObjectOdd As Object = 3
        FindMyObject(myAL, myObjectOdd)
        
        ' Locates an object that exists in the ArrayList.
        Dim myObjectEven As Object = 6
        FindMyObject(myAL, myObjectEven)
    End Sub    
    
    Public Shared Sub FindMyObject(myList As ArrayList, myObject As Object)
        Dim myIndex As Integer = myList.BinarySearch(myObject)
        If myIndex < 0 Then
            Console.WriteLine("The object to search for ({0}) is not found. " _
               + "The next larger object is at index {1}.", myObject, _
               Not myIndex)
        Else
            Console.WriteLine("The object to search for ({0}) is at index " _
               + "{1}.", myObject, myIndex)
        End If
    End Sub
     
    Public Shared Sub PrintValues(myList As IEnumerable)
        Dim obj As [Object]
        For Each obj In  myList
            Console.Write("   {0}", obj)
        Next obj
        Console.WriteLine()
    End Sub
    
End Class

开发者ID:VB.NET开发者，项目名称:System.Collections，代码行数:49，代码来源:ArrayList.BinarySearch

输出：

The Int32 ArrayList contains the following:
0    2    4    6    8
The object to search for (3) is not found. The next larger object is at index 2.
The object to search for (6) is at index 3.

示例2: SimpleStringComparer

' 导入命名空间
Imports System.Collections

Public Class SimpleStringComparer
    Implements IComparer

    Function Compare(x As Object, y As Object) As Integer Implements IComparer.Compare
          Dim cmpstr As String = CType(x, String)
          Return cmpstr.CompareTo(CType(y, String))
    End Function
End Class

Public Class MyArrayList
    Inherits ArrayList

    Public Shared Sub Main()
        ' Creates and initializes a new ArrayList.
        Dim coloredAnimals As New MyArrayList()

        coloredAnimals.Add("White Tiger")
        coloredAnimals.Add("Pink Bunny")
        coloredAnimals.Add("Red Dragon")
        coloredAnimals.Add("Green Frog")
        coloredAnimals.Add("Blue Whale")
        coloredAnimals.Add("Black Cat")
        coloredAnimals.Add("Yellow Lion")

        ' BinarySearch requires a sorted ArrayList.
        coloredAnimals.Sort()

        ' Compare results of an iterative search with a binary search
        Dim index As Integer = coloredAnimals.IterativeSearch("White Tiger")
        Console.WriteLine("Iterative search, item found at index: {0}", index)

        index = coloredAnimals.BinarySearch("White Tiger", New SimpleStringComparer())
        Console.WriteLine("Binary search, item found at index:    {0}", index)
    End Sub

    Public Function IterativeSearch(finditem As Object) As Integer
        Dim index As Integer = -1

        For i As Integer = 0 To MyClass.Count - 1
            If finditem.Equals(MyClass.Item(i))
                index = i
                Exit For
            End If
        Next i
        Return index
    End Function
End Class

开发者ID:VB.NET开发者，项目名称:System.Collections，代码行数:50，代码来源:ArrayList.BinarySearch

输出：

Iterative search, item found at index: 5
Binary search, item found at index:    5

注：本文中的System.Collections.ArrayList.BinarySearch方法示例整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。