Xojo Plugin Requires Chilkat v11.1.0+

Regular Expression Replace Full Matches

See more Regular Expressions Examples

Demonstrates replacing the full matches of a regular expression.

Note: Chilkat uses PCRE2. See PCRE2 Regular Expressions
Also see: PCRE2 Performance

Xojo Plugin

Dim success As Boolean
success = False

Dim subject As String
subject = "John Anders, +_+_+ Mary Robins $$$$"
Dim pattern As String
pattern = "\w+\s+\w+"

Dim sb As New Chilkat.StringBuilder
success = sb.Append(subject)

Dim json As New Chilkat.JsonObject
json.EmitCompact = False

Dim timeoutMs As Int32
timeoutMs = 2000
Dim numMatches As Int32
numMatches = sb.RegexMatch(pattern,json,timeoutMs)
If (numMatches < 0) Then
    //  Probably an error in the regular expression.
    //  Suggestion: Use AI to help create and/or diagnose regular expressions.
    System.DebugLog(sb.LastErrorText)
    Return
End If

//  Examine the matches:
System.DebugLog(json.Emit())

//  {
//    "match": [
//      {
//        "group": [
//          {
//            "cap": "John Anders",
//            "idx": 0,
//            "len": 11
//          }
//        ]
//      },
//      {
//        "group": [
//          {
//            "cap": "Mary Robins",
//            "idx": 19,
//            "len": 11
//          }
//        ]
//      }
//    ]
//  }

Dim sbTemp As New Chilkat.StringBuilder

Dim i As Int32
i = 0
numMatches = json.SizeOfArray("match")
While i < numMatches

    json.I = i

    //  The full match is always in group 0.
    sbTemp.Clear 
    success = json.StringOfSb("match[i].group[0].cap",sbTemp)

    //  Indicate that we wish to replace the full match with it's value converted to uppercase.
    success = sbTemp.ToUppercase()
    success = json.UpdateSb("match[i].group[0].rep",sbTemp)

    i = i + 1
Wend

//  The JSON now has replacement strings:
System.DebugLog(json.Emit())

//  {
//    "match": [
//      {
//        "group": [
//          {
//            "cap": "John Anders",
//            "idx": 0,
//            "len": 11,
//            "rep": "JOHN ANDERS"
//          }
//        ]
//      },
//      {
//        "group": [
//          {
//            "cap": "Mary Robins",
//            "idx": 19,
//            "len": 11,
//            "rep": "MARY ROBINS"
//          }
//        ]
//      }
//    ]
//  }

//  Call RegexReplace to update the StringBuilder with the replacements.
success = sb.RegexReplace(json)
If (success = False) Then
    System.DebugLog(sb.LastErrorText)
    Return
End If

System.DebugLog("Result after doing replacements:")
System.DebugLog(sb.GetAsString())

//  Result after doing replacements:
//  JOHN ANDERS, +_+_+ MARY ROBINS $$$$