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

import Foundation let pattern = #"(?:\[device name\]:\[?|\[name_of_device\]- |,)([^\],\r\n]*)(?=.*\r?\n(?:[ \t]*\[.*\r?\n)*?[ \t]*\[(?:current software\]: |software_running\]- )(.*))"# let regex = try! NSRegularExpression(pattern: pattern) let testString = ##""" Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. This is a list of all kinds of models, software, and release dates. See below for more details { #device batch 1 info can be found below { [device name]:device_1 [initial software]: SW$1_978qhuhk [current software]: sW98203_973 [date] : 2022-01-05 } { [device name]:[device_2, device_3] [initial software]: sW$3_jghs [current software]: sW$3_jghs2 [date] : 2022-07-03 } #wifi devices can be found here { { "nested children": [device name]:[w_device_1, w_device_pro] [initial software]: 982637012_sw [current software]: 93834932_swp$ [date] : 2024-02-01 } { [name_of_device]- mesh_plus [installation_date]-2023-03-21 [software_running]- mesh_sw_old } } } """## let stringRange = NSRange(location: 0, length: testString.utf16.count) let substitutionString = #""# let result = regex.stringByReplacingMatches(in: testString, range: stringRange, withTemplate: substitutionString) 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