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Macro for detect palindromes and repeats in letters/numbers string
OK for for palindromes, but the string that you posted
AABBAABB has the repeats AA AAB AABB AB ABB BB not just AA and BB... If that is what you actually want, then I will modify the code to do so. HTH, Bernie MS Excel MVP "Luciano Paulino da Silva" wrote in message ... OK! It is the following: My first problem that was related to palindromes detection your suggestion was absolutely perfect. Now, my second problem is relate to detect repeats (sequences of letters or numbers which are repeating at least twice within a string) in the same sequences. Of course that some repeats are also palindromes. But in this case the listing and counting must be only of repeats consisting of two or more letters. For example, the string that you listed bellow has only one repeat (AA) that should be listed in this case. It appears 2 times in the string. Didi you understand? Thanks in advance, Luciano On 14 abr, 23:34, "Bernie Deitrick" deitbe @ consumer dot org wrote: Luciano, I'm not clear on what you want - only those that appear more than once? What do you want with the ABBA and the AABBAA and the BAAB, all of which only appear once? Bernie "Luciano Paulino da Silva" wrote in ... Bernie, It is possible that I have not explained very well. At this moment, I`m needing a code that detect the repeats for a givem string instead to detect palindromes. For example, the string AABBAABB has two repeats (AA and BB), and they appear 2 times. Do you understand it now? Thanks in advance, Luciano On 14 abr, 21:16, "Bernie Deitrick" deitbe @ consumer dot org wrote: Luciano, Change the code to that given below to include the count of the number of repeats, then select A2:B??? before entering =PALINDROMES(A1) using Ctrl-Shift-Enter. HTH, Bernie MS Excel MVP Function Palindromes(strBig As String) As Variant Dim FoundPals() As String Dim PalCount As Integer Dim i As Integer Dim j As Integer Dim k As Integer Dim PalExists As Boolean PalCount = 1 ReDim FoundPals(1 To 2, 1 To 2) For i = 1 To Len(strBig) - 1 For j = 2 To Len(strBig) - i + 1 If isPal(Mid(strBig, i, j)) Then If PalCount = 1 Then FoundPals(1, 2) = Mid(strBig, i, j) FoundPals(2, 2) = 1 PalCount = 2 Else PalExists = False For k = 2 To UBound(FoundPals, 2) If FoundPals(1, k) = Mid(strBig, i, j) Then PalExists = True FoundPals(2, k) = FoundPals(2, k) + 1 End If Next k If Not PalExists Then ReDim Preserve FoundPals(1 To 2, 1 To PalCount + 1) FoundPals(1, PalCount + 1) = Mid(strBig, i, j) FoundPals(2, PalCount + 1) = 1 PalCount = PalCount + 1 End If End If End If Next j Next i FoundPals(1, 1) = "Palindromes found:" FoundPals(2, 1) = PalCount - 1 Palindromes = Application.Transpose(FoundPals) End Function Function isPal(strPal As String) As Boolean Dim i As Integer Dim strTemp As String isPal = False For i = Len(strPal) To 1 Step -1 strTemp = strTemp & Mid(strPal, i, 1) Next i isPal = (strPal = strTemp) End Function "Luciano Paulino da Silva" wrote in ... Bernie, Yes, it is working fine. Thank you very much. During some situations it is very slow, but I understand that there are a lot of possibilities to test. Do you know how some code could be used to check about repeats using the same strategy? Thanks in advance, Luciano |
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