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
  • Match everything enclosed
    (?:...)
  • Capture everything enclosed
    (...)
  • 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

/
/
i

Test String

Code Generator

Language

Generated Code

import Foundation let pattern = #"^[\s]*@wb_export[\s]+def ([\w]+)\(jsonstr\):[\s\S]*?"""({"in":.*)"""([\s\S]*?)((@|$)[\s\S]*)$"# let regex = try! NSRegularExpression(pattern: pattern, options: .caseInsensitive) let testString = ##""" @wb_export def SimpleFunction(jsonstr): #global fd #os.write(fd, "wb_pre\n") # Definition of Input and Output Parameters (name and type) """{"in": {"param":"string"}, "out": {"return":"string"}}""" # /!\ Do not edit here ! # Edit function SimpleFunctionImpl() in "common" part import json,os,sys,datetime inputData = json.loads(jsonstr) try: outputData = SimpleFunctionImpl(inputData["param"]) fd = os.open("../log/custom_success.log", os.O_APPEND|os.O_CREAT|os.O_RDWR) os.write(fd, "%s In : %s / Out : %s\n" % (datetime.datetime.now().strftime("[%Y-%m-%d %H:%M:%S.%f]"), jsonstr, json.dumps(outputData))) os.close(fd) return json.dumps(outputData) except Exception as e: fd = os.open("../log/custom_error.log", os.O_APPEND|os.O_CREAT|os.O_RDWR) os.write(fd, "%s INTERNAL ERROR: Custom code uncatched exception in VCO::SimpleFunction().\n\tIn : %s\n\tMessage: %s\n" % (datetime.datetime.now().strftime("[%Y-%m-%d %H:%M:%S.%f]"), jsonstr, str(e))) os.close(fd) return json.dumps({"error":"INTERNAL ERROR: Custom code uncatched exception in VCO::SimpleFunction.\n\tMessage: %s" % str(e)}) except: fd = os.open("../log/custom_error.log", os.O_APPEND|os.O_CREAT|os.O_RDWR) os.write(fd, "%s INTERNAL ERROR: Custom code uncatched system exception in VCO::SimpleFunction().\n" % (datetime.datetime.now().strftime("[%Y-%m-%d %H:%M:%S.%f]"))) os.close(fd) return json.dumps({"error":"INTERNAL ERROR: Custom code uncatched system exception in VCO::SimpleFunction()."}) # End of SimpleFunction - VCO WB Custom Code Editor @wb_export def SimpleFunction2(jsonstr): #global fd #os.write(fd, "wb_pre\n") # Definition of Input and Output Parameters (name and type) """{"in": {"param":"string"}, "out": {"return":"string"}}""" # /!\ Do not edit here ! # Edit function SimpleFunctionImpl() in "common" part return {"return": "OK2"} """## let stringRange = NSRange(location: 0, length: testString.utf16.count) if let firstMatch = regex.firstMatch(in: testString, range: stringRange) { let result: [String] = (1 ..< firstMatch.numberOfRanges).map { (testString as NSString).substring(with: firstMatch.range(at: $0)) } print(result) } else { print("No matches were found.") }

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 Swift 5.2, please visit: https://developer.apple.com/documentation/foundation/nsregularexpression