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

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"([^\|\s]\s*\[x\]\s*\K[^!|\n]*|(?:\G(?!\A)\||(?<=\[x]\s)\s*\|)\K[^|\n]*(?=\|))|([^\|\s]\s*\[x\]\s*\!\s*\K[^|\n]*|(?:\G(?!\A)\||(?<=\[x]\s)\s*\!\s*\|)\K[^|\n]*(?=\|))"; string input = @"Text for testing: - [x] Example task. | Task ends. [x] Another task. - [x] ! Example task. | This ends. [x] ! Another task. This is a sentence. [x] Task is here. Other text. Another [x] ! Task is here. | | Task name | Plan | Actual | File | | :---- | :-------------| :---------: | :---------: | :------------: | | [x] | Task example. | 08:00-08:45 | 08:00-09:00 | [[task-one]] | | [x] ! | Task example. | 08:00-08:45 | 08:00-09:00 | [[task-one]] | Description: - $1: - outside the table: capture everything after `[x]` (i.e., not followed by `!`) until a `|` - inside the table: capture everything after `[x]` (i.e., not followed by `!`) excluding the `|` symbols - $2: - outside the table: capture everything after `[x] !` until a `|` - inside the table: capture everything after `[x] !` excluding the `|` symbols Expressions for each group: - $1: - outside the table: [^\|\s]\s*\[x\]\s*\K[^!|\n]* - inside the table: (?:\G(?!\A)\||(?<=\[x]\s)\s*\|)\K[^|\n]*(?=\|) - $2: - outside the table: [^\|\s]\s*\[x\]\s*\!\s*\K[^|\n]* - inside the table: (?:\G(?!\A)\||(?<=\[x]\s)\s*\!\s*\|)\K[^|\n]*(?=\|) Combined expression: ([^\|\s]\s*\[x\]\s*\K[^!|\n]*|(?:\G(?!\A)\||(?<=\[x]\s)\s*\|)\K[^|\n]*(?=\|))|([^\|\s]\s*\[x\]\s*\!\s*\K[^|\n]*|(?:\G(?!\A)\||(?<=\[x]\s)\s*\!\s*\|)\K[^|\n]*(?=\|)) "; RegexOptions options = RegexOptions.Multiline; foreach (Match m in Regex.Matches(input, pattern, options)) { Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index); } } }

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