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

import Foundation let pattern = #"(\[[\s\n\r]*\{|\},[\s\n\r]+\{|\}[\s\n\r]*\])"# let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines) let testString = #""" [ { "Assigned to": "Jones, Francis", "Cost": 3, "Created date": "2024-02-28 12:52:18", "Extraction date": "2024-03-02 13:51:00", "ID": 12345, "Initial Cost": 3, "Location": "Sites", "Path": "Sites\\FY1\\S3", "Priority": 1, "State": "In Progress", "Status Change date": "2024-03-05 16:33:23", "Tags": "Europe; Finance", "Title": "Ensure correct routing of orders", "Updated date": "2024-03-05 16:33:23", "Warranty": false, "Wave Quarter": "Q2 22", "Work Item Type": "Request" }, { "Assigned to": "Jones, Francis", "Cost": 3, "Created date": "2024-02-28 18:59:18", "Extraction date": "2024-03-05 16:31:00", "ID": 12345, "Initial Cost": 3, "Location": "Sites", "Path": "Sites\\FY1\\S3", "Priority": 1, "State": "In Progress", "Status Change date": "2024-03-05 16:33:23", "Tags": "Europe; Finance", "Title": "Ensure correct routing of orders", "Updated date": "2024-03-05 16:33:23", "Warranty": false, "Wave Quarter": "Q2 22", "Work Item Type": "Request" }, { "Assigned to": "Jones, Francis", "Cost": 3, "Created date": "2023-01-28 18:59:18", "Extraction date": "2023-02-05 16:31:00", "ID": 12345, "Initial Cost": 3, "Location": "Sites", "Path": "Sites\\FY1\\S3", "Priority": 1, "State": "In Progress", "Status Change date": "2023-02-05 16:33:23", "Tags": "Europe; Finance", "Title": "Ensure correct routing of orders", "Updated date": "2024-03-05 16:33:23", "Warranty": false, "Wave Quarter": "Q2 22", "Work Item Type": "Request" } ] """# let stringRange = NSRange(location: 0, length: testString.utf16.count) let matches = regex.matches(in: testString, range: stringRange) var result: [[String]] = [] for match in matches { var groups: [String] = [] for rangeIndex in 1 ..< match.numberOfRanges { let nsRange = match.range(at: rangeIndex) guard !NSEqualRanges(nsRange, NSMakeRange(NSNotFound, 0)) else { continue } let string = (testString as NSString).substring(with: nsRange) groups.append(string) } if !groups.isEmpty { result.append(groups) } } print(result)

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