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

/
/
gm

Test String

Code Generator

Language

Generated Code

package main import ( "regexp" "fmt" ) func main() { var re = regexp.MustCompile(`(?m)^(?<FlightDesignator>([A-Z0-9]{2}[A-Z]?)([0-9]{3,4}))(?<OperationalSuffix>[A-Z])?(?<FlightIdentifierDate>\/(\d{2})([A-Z]{3})?(\d{2})?)?(\s(?<FlightLegsChangeIdentifier>(\/?[A-Z]{3})+)(?=(\s|$)))?(\s1(?<JointOperationAirlineDesignators>(\/.{2}[A-Z]?)+))?(\s3\/(?<AircraftOwner>([A-Z]{2}|.)))?(\s4\/(?<CockpitCrewEmployer>(.+?)(?=(?: \d\/|$))))?(\s5\/(?<CabinCrewEmployer>([A-Z]{2}|.)))?(?<OnwardFlight>\s6\/(([A-Z0-9]{2}[A-Z]?)([0-9]{3,4}))([A-Z])?(\/(\d{2})([A-Z]{3})?(\d{2})?)?)?(\s7\/(?<MealServiceNote>(\/?[A-Z]{0,3})+))?(\s9\/(?<OperatingAirlineDisclosure>(.{2}[A-Z]?)))?`) var str = `BNE1010/1000 HKG1955/2005 7/PLD/CLD/YLD RG878A/21AUG15 GIG/BOG 1/RG/AV 3/AV 4/AV 5/RG 6/AV081C/22 7/CDC/YD 9/TP` for i, match := range re.FindAllString(str, -1) { fmt.Println(match, "found at index", i) } }

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/