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

Substitution

Processing...

Code Generator

Generated Code

#include <MsgBoxConstants.au3> ; to declare the Constants of MsgBox Local $sRegex = "(?m)^@(.*?){(.*?),((.|\n)*?)+(}}|\n})+$" Local $sString = "@inproceedings{martens2010deep," & @CRLF & _ "title={Deep learning via Hessian-free optimization}," & @CRLF & _ "author={Martens, James}," & @CRLF & _ "booktitle={Proceedings of the 27th International Conference on Machine Learning (ICML-10)}," & @CRLF & _ "pages={735--742}," & @CRLF & _ "year={2010}" & @CRLF & _ "}" & @CRLF & _ "@article-journal{AAA," & @CRLF & _ " url = {http://www.example.com}," & @CRLF & _ " year = {2016}," & @CRLF & _ " month = {}," & @CRLF & _ " publisher = {Elsevier}," & @CRLF & _ " journal = {{AAA Journal}}," & @CRLF & _ " author = {Austin Anderson and Austin Arnold}," & @CRLF & _ " title = {{Nothing To See Here}}," & @CRLF & _ "}" & @CRLF & _ "@article-journal{ZZZ," & @CRLF & _ " url = {http://www.example.com}," & @CRLF & _ " year = {2016}," & @CRLF & _ " month = {}," & @CRLF & _ " publisher = {Elsevier}," & @CRLF & _ " journal = {{ZZZ Journal}}," & @CRLF & _ " author = {Austin Zyzygy}," & @CRLF & _ " title = {{Moving On Up}}," & @CRLF & _ "}" & @CRLF & _ "@article-journal{InstMed2001," & @CRLF & _ " url = {http://www.ncbi.nlm.nih.gov/pubmed/25057539}," & @CRLF & _ " year = {2001}," & @CRLF & _ " month = {}," & @CRLF & _ " publisher = {{National Academy of Sciences}}," & @CRLF & _ " doi = {10.17226/10027}," & @CRLF & _ " volume = {}," & @CRLF & _ " number = {}," & @CRLF & _ " pages = {}," & @CRLF & _ " pmid = {25057539}," & @CRLF & _ " pmcid = {}," & @CRLF & _ " journal = {{}}," & @CRLF & _ " author = {{National Academy of Sciences}}," & @CRLF & _ " title = {{Crossing the Quality Chasm: A New Health System for the 21st Century}}," & @CRLF & _ "}" & @CRLF & _ "@article-journal{Wallace2013," & @CRLF & _ " url = {http://apt.rcpsych.org/content/19/4/250}," & @CRLF & _ " year = {2013}," & @CRLF & _ " month = {July}," & @CRLF & _ " publisher = {{Royal College of Psychiatrists}}," & @CRLF & _ " doi = {10.1192/apt.bp.112.010389}," & @CRLF & _ " volume = {19}," & @CRLF & _ " number = {4}," & @CRLF & _ " pages = {250-258}," & @CRLF & _ " journal = {{BJPsych Advances}}," & @CRLF & _ " author = {John Wallace}," & @CRLF & _ " title = {{Lost in translation: transferring knowledge from research to clinical practice}}," & @CRLF & _ "}" & @CRLF & _ "@article-journal{Glasziou2005," & @CRLF & _ " url = {http://ebn.bmj.com/content/8/2/36.full}," & @CRLF & _ " year = {2005}," & @CRLF & _ " month = {}," & @CRLF & _ " publisher = {{British Medical Journal}}," & @CRLF & _ " doi = {10.1136/ebn.8.2.36}," & @CRLF & _ " volume = {8}," & @CRLF & _ " number = {}," & @CRLF & _ " pages = {36-38}," & @CRLF & _ " journal = {{Evidence Based Nursing}}," & @CRLF & _ " author = {Paul Glasziou and Brian Haynes}," & @CRLF & _ " title = {{The paths from research to improved health outcomes}}," & @CRLF & _ "}" & @CRLF & _ "@article-journal{Glasziou2011," & @CRLF & _ " url = {http://pmj.bmj.com/content/early/2011/06/29/pgmj.2010.116012.full.html}," & @CRLF & _ " year = {2011}," & @CRLF & _ " month = {June}," & @CRLF & _ " publisher = {{British Medical Journal}}," & @CRLF & _ " doi = {10.1136/pgmj.2010.116012}," & @CRLF & _ " volume = {}," & @CRLF & _ " number = {}," & @CRLF & _ " pages = {}," & @CRLF & _ " pmid = {}," & @CRLF & _ " pmcid = {}," & @CRLF & _ " journal = {{Postgraduate Medicine Journal}}," & @CRLF & _ " author = {Sharon Mickan and Amanda Burls and Paul Glasziou}," & @CRLF & _ " title = {{Patterns of 'leakage' in the utilisation of clinical guidelines: a systematic review}}," & @CRLF & _ "}" & @CRLF & _ "" Local $sSubst = "{\"id\":\"${2}\",\"type\":${1},\"content\":[{${3}]}}" Local $sResult = StringRegExpReplace($sString, $sRegex, $sSubst) MsgBox($MB_SYSTEMMODAL, "Result", $sResult)

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 AutoIt, please visit: https://www.autoitscript.com/autoit3/docs/functions/StringRegExp.htm