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
Processing...

Test String

Substitution
Processing...

Code Generator

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"(?:(?=(?&V_Obj)){(?=(?:(?&V_KeyVal)(?&Sep_Obj))*?\s*(""jobID""\s*:\s*(?&V_Value)))(?=(?:(?&V_KeyVal)(?&Sep_Obj))*?\s*(""exec""\s*:\s*(?&V_Value)))(?:(?&V_KeyVal)(?&Sep_Obj))+})(?(DEFINE)(?<Sep_Ary>\s*(?:,(?!\s*[}\]])|(?=\])))(?<Sep_Obj>\s*(?:,(?!\s*[}\]])|(?=})))(?<Str>(?>""[^\\""]*(?:\\[\s\S][^\\""]*)*""))(?<Numb>(?>[+-]?(?:\d+(?:\.\d*)?|\.\d+)(?:[eE][+-]?\d+)?|(?:[eE][+-]?\d+)))(?<V_KeyVal>(?>\s*(?&Str)\s*:\s*(?&V_Value)\s*))(?<V_Value>(?>(?&Numb)|(?>true|false|null)|(?&Str)|(?&V_Obj)|(?&V_Ary)))(?<V_Ary>\[(?>\s*(?&V_Value)(?&Sep_Ary))*\s*\])(?<V_Obj>{(?>(?&V_KeyVal)(?&Sep_Obj))*\s*}))"; string substitution = @"{ $1, $2 }"; string input = @"{ ""2597401"": [ { ""jobID"": ""2597401"", ""account"": ""TG-CCR120014"", ""user"": ""charngda"", ""pkgT"": { ""pgi/7.2- 5"": { ""libA"": [ ""libpgc.so"" ], ""flavor"": [ ""default"" ] } }, ""startEpoch"": ""1338497979"", ""runTime"": ""1022"", ""execType"": ""user:binary"", ""exec"": ""ft.D.64"", ""numNodes"": ""4"", ""sha1"": ""5a79879235aa31b6a46e73b43879428e2a175db5"", ""execEpoch"": 1336766742, ""execModify"": ""Fri May 11 15:05:42 2012"", ""startTime"": ""Thu May 31 15:59:39 2012"", ""numCores"": ""64"", ""sizeT"": { ""bss"": ""1881400168"", ""text"": ""239574"", ""data"": ""22504"" } }, { ""jobID"": ""2597401"", ""account"": ""TG-CCR120014"", ""user"": ""charngda"", ""pkgT"": { ""pgi/7.2-5"": { ""libA"": [ ""libpgc.so"" ], ""flavor"": [ ""default"" ] } }, ""startEpoch"": ""1338497946"", ""runTime"": ""33"", ""execType"": ""user:binary"", ""exec"": ""cg.C.64"", ""numNodes"": ""4"", ""sha1"": ""caf415e011e28b7e4e5b050fb61cbf71a62a9789"", ""execEpoch"": 1336766735, ""execModify"": ""Fri May 11 15:05:35 2012"", ""startTime"": ""Thu May 31 15:59:06 2012"", ""numCores"": ""64"", ""sizeT"": { ""bss"": ""29630984"", ""text"": ""225749"", ""data"": ""20360"" } }, { ""jobID"": ""2597401"", ""account"": ""TG-CCR120014"", ""user"": ""charngda"", ""pkgT"": { ""pgi/7.2-5"": { ""libA"": [ ""libpgc.so"" ], ""flavor"": [ ""default"" ] } }, ""startEpoch"": ""1338500447"", ""runTime"": ""145"", ""execType"": ""user:binary"", ""exec"": ""mg.D.64"", ""numNodes"": ""4"", ""sha1"": ""173de32e1514ad097b1c051ec49c4eb240f2001f"", ""execEpoch"": 1336766756, ""execModify"": ""Fri May 11 15:05:56 2012"", ""startTime"": ""Thu May 31 16:40:47 2012"", ""numCores"": ""64"", ""sizeT"": { ""bss"": ""456954120"", ""text"": ""426186"", ""data"": ""22184"" } }, { ""jobID"": ""2597401"", ""account"": ""TG-CCR120014"", ""user"": ""charngda"", ""pkgT"": { ""pgi/7.2-5"": { ""libA"": [ ""libpgc.so"" ], ""flavor"": [ ""default"" ] } }, ""startEpoch"": ""1338499002"", ""runTime"": ""1444"", ""execType"": ""user:binary"", ""exec"": ""lu.D.64"", ""numNodes"": ""4"", ""sha1"": ""c6dc16d25c2f23d2a3321d4feed16ab7e10c2cc1"", ""execEpoch"": 1336766748, ""execModify"": ""Fri May 11 15:05:48 2012"", ""startTime"": ""Thu May 31 16:16:42 2012"", ""numCores"": ""64"", ""sizeT"": { ""bss"": ""199850984"", ""text"": ""474218"", ""data"": ""27064"" } } ] }"; RegexOptions options = RegexOptions.Multiline; Regex regex = new Regex(pattern, options); string result = regex.Replace(input, substitution); } }

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 C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx