Arrays visualbasic中的可移植模式函数
我试图让我的Arrays visualbasic中的可移植模式函数,arrays,vb.net,object,analysis,Arrays,Vb.net,Object,Analysis,我试图让我的模式函数接受任何类型的数组,但没有任何进展。这是我现在得到的: Private Function Mode(ByRef list As Object) As Object Dim array() As Object = {} Try array = CType(list, Object()) Catch ex As Exception MessageBox.Show("Failed to
模式
函数接受任何类型的数组,但没有任何进展。这是我现在得到的:
Private Function Mode(ByRef list As Object) As Object
Dim array() As Object = {}
Try
array = CType(list, Object())
Catch ex As Exception
MessageBox.Show("Failed to cast array of Objects in Mode function!")
Return Nothing
End Try
Dim uniqueObjects() As Integer = {array(0)}
Dim frequency() As Integer = {1}
For i As Integer = 0 To array.Length - 1
For j As Integer = 0 To uniqueObjects.Length - 1 'loop through frequency
If array(i) = uniqueObjects(j) Then
frequency(j) += 1
Exit For
ElseIf j = uniqueObjects.Length - 1 Then
ReDim Preserve uniqueObjects(uniqueObjects.Length) 'add to unique objects array
uniqueObjects(uniqueObjects.Length - 1) = array(i)
ReDim Preserve frequency(frequency.Length) 'increment frequency
frequency(frequency.Length - 1) += 1
End If
Next
Next
Return uniqueObjects(System.Array.IndexOf(frequency, frequency.Max))
End Function
我通常会摆脱对CType
的缓慢调用,只向函数传递一个对象数组,但当我向函数传递一个整数数组时,会出现一个奇怪的错误:
错误1“整数的一维数组”类型的值无法转换为“对象的一维数组”,因为“整数”不是引用类型。{filename}.vb{line}{column}{project name}
这比我预想的要复杂得多。有人能提供建议吗?让它成为一个通用函数怎么样
Private Function Mode(Of T)(ByRef array As T()) As Object
'...
End Function
或
然后你会:
Dim obj As Object = Mode(Of Integer)({0, 1, 2, 3})
或:
不,我也试过了。如果数组(i)=uniqueObjects(j),则行
不起作用。它说运算符=不是为T类型的对象定义的。您需要将其更改为“If(Object.Equals(array(i),uniqueObjects(j)),然后”并且您应该将uniqueObjects声明为T的数组。
Dim obj As Object = Mode(Of Integer)({0, 1, 2, 3})
Dim obj As Integer() = Mode(Of Integer)({0, 1, 2, 3})