Android Question How to fix error with 2D-array ?

Volga_ · Jul 22, 2023

Hello,
I have problem with 2D-array in B4A when I compile this code:

2D-Array::

Dim s(,) As String
s=Array As String(Array As String("1","2","3"), Array As String("3","4","5"))

Compiler shows error:

Error::

Error description: Cannot cast type: {Type=String,Rank=1, RemoteObject=True} to: {Type=String,Rank=2, RemoteObject=True}

How to fix this? Thanks.

Erel · Jul 23, 2023

You cannot use Array keyword to directly create 2d arrays.

You can do something like this:

B4X:

Sub AppStart (Args() As String)
    Dim mat(0, 0) As String = Create2DArrayOfStrings(Array( _
        Array As String("a", "b", "c", "d"), _
        Array As String("aa", "bb", "cc", "dd"), _
        Array As String("aaa", "bbb", "ccc", "ddd")))
    Log(mat(0, 2))
    Log(mat(1, 3))
End Sub


Private Sub Create2DArrayOfStrings (Rows() As Object) As String(,)
    Dim FirstRow() As String = Rows(0)
    Dim result(Rows.Length, FirstRow.Length) As String
    For r = 0 To Rows.Length - 1
        Dim row() As String = Rows(r)
        For c = 0 To FirstRow.Length - 1
            result(r, c) = row(c)
        Next
    Next
    Return result
End Sub

Android Question How to fix error with 2D-array ?

Volga_

Member

Erel

B4X founder

Android Question How to fix error with 2D-array ?

Volga_

Member

Erel

B4X founder

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