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

r"
"
gm

Test String

Code Generator

Language

Generated Code

import Foundation let pattern = #"devSummaryJson={.*(?=}]})"# let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines) let testString = #"{"expand": "names,schema","startAt": 0,"maxResults": 50,"total": 1,"issues": [{"expand": "operations,versionedRepresentations,editmeta,changelog,renderedFields","id": "641955","self": "https://rb-tracker.bosch.com/tracker19/rest/api/latest/issue/641955","key": "EDATOOL-1411","fields": {"created": "2022-12-06T11:14:36.000+0100","customfield_10000": "{summaryBean=com.atlassian.jira.plugin.devstatus.rest.SummaryBean@24a1688f[summary={pullrequest=com.atlassian.jira.plugin.devstatus.rest.SummaryItemBean@23f2f23c[overall=PullRequestOverallBean{stateCount=0, state='OPEN', details=PullRequestOverallDetails{openCount=0, mergedCount=0, declinedCount=0}},byInstanceType={}], build=com.atlassian.jira.plugin.devstatus.rest.SummaryItemBean@321de5ab[overall=com.atlassian.jira.plugin.devstatus.summary.beans.BuildOverallBean@6ca82c6[failedBuildCount=0,successfulBuildCount=0,unknownBuildCount=0,count=0,lastUpdated=<null>,lastUpdatedTimestamp=<null>],byInstanceType={}], review=com.atlassian.jira.plugin.devstatus.rest.SummaryItemBean@5fc3e1e6[overall=com.atlassian.jira.plugin.devstatus.summary.beans.ReviewsOverallBean@7a2d42e3[stateCount=0,state=<null>,dueDate=<null>,overDue=false,count=0,lastUpdated=<null>,lastUpdatedTimestamp=<null>],byInstanceType={}], deployment-environment=com.atlassian.jira.plugin.devstatus.rest.SummaryItemBean@2740d0b0[overall=com.atlassian.jira.plugin.devstatus.summary.beans.DeploymentOverallBean@75ceaa2c[topEnvironments=[],showProjects=false,successfulCount=0,count=0,lastUpdated=<null>,lastUpdatedTimestamp=<null>],byInstanceType={}], repository=com.atlassian.jira.plugin.devstatus.rest.SummaryItemBean@35c2a9a2[overall=com.atlassian.jira.plugin.devstatus.summary.beans.CommitOverallBean@2568cfa3[count=0,lastUpdated=<null>,lastUpdatedTimestamp=<null>],byInstanceType={}], branch=com.atlassian.jira.plugin.devstatus.rest.SummaryItemBean@40c4eee[overall=com.atlassian.jira.plugin.devstatus.summary.beans.BranchOverallBean@4131b89[count=0,lastUpdated=<null>,lastUpdatedTimestamp=<null>],byInstanceType={}]},errors=[],configErrors=[]], devSummaryJson={\"cachedValue\":{\"errors\":[],\"configErrors\":[],\"summary\":{\"pullrequest\":{\"overall\":{\"count\":0,\"lastUpdated\":null,\"stateCount\":0,\"state\":\"OPEN\",\"details\":{\"openCount\":0,\"mergedCount\":0,\"declinedCount\":0,\"total\":0},\"open\":true},\"byInstanceType\":{}},\"build\":{\"overall\":{\"count\":0,\"lastUpdated\":null,\"failedBuildCount\":0,\"successfulBuildCount\":0,\"unknownBuildCount\":0},\"byInstanceType\":{}},\"review\":{\"overall\":{\"count\":0,\"lastUpdated\":null,\"stateCount\":0,\"state\":null,\"dueDate\":null,\"overDue\":false,\"completed\":false},\"byInstanceType\":{}},\"deployment-environment\":{\"overall\":{\"count\":0,\"lastUpdated\":null,\"topEnvironments\":[],\"showProjects\":false,\"successfulCount\":0},\"byInstanceType\":{}},\"repository\":{\"overall\":{\"count\":0,\"lastUpdated\":null},\"byInstanceType\":{}},\"branch\":{\"overall\":{\"count\":0,\"lastUpdated\":null},\"byInstanceType\":{}}}},\"isStale\":true}}"}}]}"# 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