CODEWITHSUNDEEP
regexvbaexceldirectory
gaussblurinc
gaussblurinc

Reputation: 3682

VBA: Regex and Dir() function questions

I wrote a simple script, using VBA. (I need to optimize some work with excel).

First question about Regex:

As I said before, I used VBA.

Simple task: get a match of pattern and capture the submatches.

my code is: 

Dim ResStr as Object
Dim LastStr as Object
Dim RE as Object


Set RE = CreateObject("vbscript.regexp") 'create a regex
With RE
    .MultiLine = False  'm-key
    .Global = False     'g-key
    .IgnoreCase = False 'i-key
    .Pattern = "[<]TD\s+class=gm[>](\d+\.\d+)[<][/]TD[>]" 'tag
End With

Set ResStr = RE.Execute(StrDollar)  'use regex  
Set LastStr = ResStr(0).SubMatches  'get submatch

How do I get the LAST match and LAST submatch? (length-property?)

Second question about Dir function:

How do I filter the files?

I saw this code on msdn: 

   ' Display the names in C:\ that represent directories.
   MyPath = "c:\"   ' Set the path.
   MyName = Dir(MyPath, vbDirectory)   ' Retrieve the first entry.
   Do While MyName <> ""   ' Start the loop.
     ' Use bitwise comparison to make sure MyName is a directory.
     If (GetAttr(MyPath & MyName) And vbDirectory) = vbDirectory Then
       ' Display entry only if it's a directory.
       Debug.WriteLine(MyName)
     End If   
     MyName = Dir()   ' Get next entry.
  Loop

If (GetAttr(MyPath & MyName) And vbDirectory) = vbDirectory Then - stop 'msdn-guy'! are you kidding? is it ONLY one method?

Is there any possible way to make normal filter, not this tremendous-line method?

Upvotes: 1

Views: 2585

Answers (2)

Cylian
Cylian

Reputation: 11182

Question 1

You could try this: 

Sub Test(StrDollar)
Dim LastStr As Object
Dim RE As New RegExp
Dim mt As Match


With RE
    .MultiLine = False  'm-key
    .Global = True     'g-key
    .IgnoreCase = False 'i-key
    .Pattern = "<TD\s+class=gm>(\d+\.\d+)</TD>" 'tag
    For Each mt In .Execute(StrDollar)
         Set LastStr = mt.SubMatches  'get submatch
    Next mt
End With

MsgBox LastStr(0)

End Sub

Quetion 2

Perhaps dir() function is not able to make a list of files based of a extension.

[EDIT]

Sub Test2(StrDollar)
Dim LastStr As Object
Dim RE As New RegExp
Dim mt As Match
Dim dic As New Scripting.Dictionary 'scripting runtime
Dim pos&

With RE
    .MultiLine = False  'm-key
    .Global = True     'g-key
    .IgnoreCase = False 'i-key
    .Pattern = "<TD\s+class=gm>(\d+\.\d+)</TD>" 'tag
    For Each mt In .Execute(StrDollar)
        pos = pos + 1
        dic.Add CStr(pos), mt.FirstIndex & "||" & mt.Value & "||" & mt.SubMatches(0)
    Next mt
End With

MsgBox dic.item(CStr(pos))

End Sub

[/EDIT]

Upvotes: 1

brettdj
brettdj

Reputation: 55682

To get all matches, submatches, length etc you would use something like this - I have added a working example with a simpler pattern to demonstrate (ie match a sequences of numbers with then a non-number)

You should Test your regexp before presuming a match has been found to avoid erros

Sub Test()
Dim RE As Object
Dim strSample As String
Dim ResStr As Object
Dim LastStr As Object
strSample = "123dd6789a"
Set RE = CreateObject("vbscript.regexp")    'create a regex
With RE
    .MultiLine = False  'm-key
    .Global = True     'g-key
    .IgnoreCase = False    'i-key
    .Pattern = "\d+([^\d])"
End With
If RE.Test(strSample) Then
    Set ResStr = RE.Execute(strSample)
    For Each LastStr In ResStr
        MsgBox "Match: " & LastStr & vbNewLine & "SubMatch: " & LastStr.submatches(0) & vbNewLine & "Position: " & LastStr.firstindex + 1 & vbNewLine & "Length: " & LastStr.Length
    Next
End If
End Sub

Upvotes: 3

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