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

package main import ( "regexp" "fmt" ) func main() { var re = regexp.MustCompile(`(?m)^\}$`) var str = `{ "_score": 1.0, "_index": "newsvit", "_source": { "content": " \u0641\u0647\u06cc\u0645\u0647 \u062d\u0633\u0646\u200c\u0645\u06cc\u0631\u06cc: ", "title": "\u06a9\u0627\u0631\u0647\u0627\u06cc \u0642\u0627\u0644\u06cc\u0628\u0627\u0641 ", "lead": "\u062c\u0627\u0645\u0639\u0647&nbsp;&gt;&nbsp;\u0634\u0647\u0631\u06cc - \u0645\u06cc\u0632\u06af\u0631\u062f\u06cc \u062f\u0631\u0628\u0627\u0631\u0647 .", "agency": "13", "date_created": 1494518193, "url": "http://www.khabaronline.ir/(X(1)S(bud4wg3ebzbxv51mj45iwjtp))/detail/663749/society/urban", "image": "uploads/2017/05/11/1589793661.jpg", "category": "15" }, "_type": "news", "_id": "2981643" } { "_score": 1.0, "_index": "newsvit", "_source": { "content": "\u0645/\u0630", "title": "\u0645\u0639\u0646\u0648\u06cc\u062a \u062f\u0631 \u0639\u0635\u0631 ", "lead": "\u0645\u062f\u06cc\u0631 \u0645\u0624\u0633\u0633\u0647 \u0639\u0644\u0645\u06cc \u0648 \u067e\u0698\u0648\u0647\u0634\u06cc \u0627\u0628\u0646\u200c\u0633\u06cc\u0646\u0627 \u062f\u0631 .", "agency": "1", "date_created": 1494521817, "url": "http://www.farsnews.com/13960221001386", "image": "uploads/2017/05/11/1713799235.jpg", "category": "20" }, "_type": "news", "_id": "2981951" } ....` for i, match := range re.FindAllString(str, -1) { fmt.Println(match, "found at index", i) } }

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 Golang, please visit: https://golang.org/pkg/regexp/