Lianja

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

Lianja

llSuccess = .F.

llSuccess = .F.

lcSubject = "John Anders, +_+_+ Mary Robins $$$$"
lcPattern = "\\w+\\s+\\w+"

loSb = createobject("CkStringBuilder")
loSb.Append(lcSubject)

loJson = createobject("CkJsonObject")
loJson.EmitCompact = .F.

lnTimeoutMs = 2000
lnNumMatches = loSb.RegexMatch(lcPattern,loJson,lnTimeoutMs)
if (lnNumMatches < 0) then
    // Probably an error in the regular expression.
    // Suggestion: Use AI to help create and/or diagnose regular expressions.
    ? loSb.LastErrorText
    release loSb
    release loJson
    return
endif

// Examine the matches:
? loJson.Emit()

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

loSbTemp = createobject("CkStringBuilder")

i = 0
lnNumMatches = loJson.SizeOfArray("match")
do while i < lnNumMatches

    loJson.I = i

    // The full match is always in group 0.
    loSbTemp.Clear()
    loJson.StringOfSb("match[i].group[0].cap",loSbTemp)

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

    i = i + 1
enddo

// The JSON now has replacement strings:
? loJson.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.
llSuccess = loSb.RegexReplace(loJson)
if (llSuccess = .F.) then
    ? loSb.LastErrorText
    release loSb
    release loJson
    release loSbTemp
    return
endif

? "Result after doing replacements:"
? loSb.GetAsString()

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


release loSb
release loJson
release loSbTemp