How to place array elements that have position and value in their specific positions in the string

Question

hi. The output of the function is expected to be like this:

Dim Result as String="AAAAA(Word1)BBBBB(Word2)CCCCC(Word3)DDDDD"

Q&A Assist did not have the expected result

   Structure ResultItem
        Public Value As String
        Public Position As Integer
    End Structure

  Sub Test()
       Dim lisResult As New List(Of ResultItem)
        lisResult.Add(New ResultItem With {.Value = "(Word1)", .Position = 5})
        lisResult.Add(New ResultItem With {.Value = "(Word2)", .Position = 10})
        lisResult.Add(New ResultItem With {.Value = "(Word3)", .Position = 15})
  dim MyString as String="AAAAABBBBBCCCCCDDDDD"

  'Need a function with this achievement:
  Dim Result as String="AAAAA(Word1)BBBBB(Word2)CCCCC(Word3)DDDDD"
  End Sub

Answer 1

Try an adjusted function:

Function Insert(s As String, results As IReadOnlyList(Of ResultItem)) As String

    For Each r In results.OrderByDescending(Function(t) t.Position)
        s = s.Insert(r.Position, r.Value)
    Next

    Return s

End Function

Answer 2

To achieve the desired result of inserting elements from an array into specific positions within a string in Visual Basic, you can create a function that constructs the new string based on the positions specified in your ResultItem structure. Here’s an example of how you can implement this:

Structure ResultItem
    Public Value As String
    Public Position As Integer
End Structure

Function InsertItems(originalString As String, items As List(Of ResultItem)) As String
    Dim result As New System.Text.StringBuilder(originalString)

    ' Sort items by position to avoid issues with shifting indices
    items = items.OrderBy(Function(item) item.Position).ToList()

    ' Insert each item at its specified position
    For Each item In items
        result.Insert(item.Position, item.Value)
    Next

    Return result.ToString()
End Function

Sub Test()
    Dim lisResult As New List(Of ResultItem)
    lisResult.Add(New ResultItem With {.Value = "(Word1)", .Position = 5})
    lisResult.Add(New ResultItem With {.Value = "(Word2)", .Position = 10})
    lisResult.Add(New ResultItem With {.Value = "(Word3)", .Position = 15})

    Dim MyString As String = "AAAAABBBBBCCCCCDDDDD"
    Dim Result As String = InsertItems(MyString, lisResult)

    ' Result will be "AAAAA(Word1)BBBBB(Word2)CCCCC(Word3)DDDDD"
End Sub

In this code:

• The InsertItems function takes the original string and a list of ResultItem structures.
• It uses a StringBuilder to efficiently manipulate the string.
• The items are sorted by their position to ensure that inserting them does not affect the positions of subsequent items.
• Finally, it returns the modified string with the inserted values.

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References:

• Arrays in Visual Basic
• How to: Convert a String to an Array of Characters in Visual Basic
• String Basics in Visual Basic