Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
No Match

/
/
g

Test String

Substitution

Processing...

Code Generator

Language

Generated Code

package main import ( "regexp" "fmt" ) func main() { var re = regexp.MustCompile(`(\/CIP3AdmJobName *\()([^\)]+)(\)[^\n]+)\n([^\(]+\()([^\)]+)`) var str = `%!PS-Adobe-3.0 %%CIP3-File Version 2.1 %-Cip3-PPF-(RD16-2015-11-09) %Mirror:1 Rotation:0 %PPFOnly-Mode %ASCII-HEX-Imagedata %------------------------------------------- % Sheet %------------------------------------------- CIP3BeginSheet /CIP3AdmJobCode (686708) def /CIP3AdmJobName (686708) def /CIP3AdmSheetName (Sig-2) def %No TypeOfScreen /CIP3AdmCreationTime (Tue Feb 07 14:41:38 2017) def /CIP3AdmSheetLay /Left def /CIP3AdmPaperGrammage 56.0 def /CIP3AdmPaperThickness 0.051 mm def %No /CIP3AdmPaperColor <-InData /CIP3TransferFilmCurveData [0.0 0.0 1.0 1.0] def /CIP3TransferPlateCurveData [0.0 0.0 1.0 1.0] def /CIP3AdmPSExtent [2763.77953 1734.80315] def /CIP3AdmPaperExtent [ 2412.00000000 1638.00000000 ] def /CIP3AdmPaperTrf [ 1 0 0 1 -175.88976378 -63.77940283 ] def` var substitution = "$1$2-$5$3\n$4$5" fmt.Println(re.ReplaceAllString(str, substitution)) }

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Golang, please visit: https://golang.org/pkg/regexp/