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

/
/
gm

Test String

Code Generator

Generated Code

#include <StringConstants.au3> ; to declare the Constants of StringRegExp #include <Array.au3> ; UDF needed for _ArrayDisplay and _ArrayConcatenate Local $sRegex = "(?m)^[\p{Pd}\xAD\x{2212}]+" Local $sString = "-s < intorstring >" & @CRLF & _ "-t < string >" & @CRLF & _ "(GTF.featureType)" & @CRLF & _ "Specify the feature type. Only rows which have the matched" & @CRLF & _ "feature type in the provided GTF annotation file will be included for read counting. ‘exon’ by default." & @CRLF & _ "-T < int >" & @CRLF & _ "(nthreads)" & @CRLF & _ "Number of the threads. The value should be between 1 and" & @CRLF & _ "32. 1 by default." & @CRLF & _ "-v Output version of the program." & @CRLF & _ "−−byReadGroup" & @CRLF & _ "(byReadGroup)" & @CRLF & _ "Count reads by read group. Read group information is identified from the header of BAM/SAM input files and the generated count table will include counts for each group in each" & @CRLF & _ "library." & @CRLF & _ "−−donotsort" & @CRLF & _ "(autosort)" & @CRLF & _ "If specified, paired end reads will not be re-ordered even if" & @CRLF & _ "reads from the same pair were found not to be next to each" & @CRLF & _ "other in the input." & @CRLF & _ "−−extraAttributes" & @CRLF & _ "< string >" & @CRLF & _ "(GTF.attrType.extra)" & @CRLF & _ "Extract extra attribute types from the provided GTF annotation and include them in the counting output. These attribute" & @CRLF & _ "types will not be used to group features. If more than one attribute type is provided they should be separated by comma" & @CRLF & _ "(in Rsubread featureCounts its value is a character vector)." & @CRLF & _ "−−fraction" & @CRLF & _ "(fraction)" & @CRLF & _ "Assign fractional counts to features. This option must be used" & @CRLF & _ "together with ‘-M’ or ‘-O’ or both. When ‘-M’ is specified," & @CRLF & _ "each reported alignment from a multi-mapping read (identified via ‘NH’ tag) will carry a count of 1/x, instead of 1 (one)," & @CRLF & _ "where x is the total number of alignments reported for the" & @CRLF & _ "same read. When ‘-O’ is specified, each overlapping feature" & @CRLF & _ "will receive a count of 1/y, where y is the total number of" & @CRLF & _ "features overlapping with the read. When both ‘-M’ and ‘-O’" & @CRLF & _ "are specified, each alignment will carry a count of 1/(x*y)" Local $aArray = StringRegExp($sString, $sRegex, $STR_REGEXPARRAYGLOBALFULLMATCH) Local $aFullArray[0] For $i = 0 To UBound($aArray) -1 _ArrayConcatenate($aFullArray, $aArray[$i]) Next $aArray = $aFullArray ; Present the entire match result _ArrayDisplay($aArray, "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 AutoIt, please visit: https://www.autoitscript.com/autoit3/docs/functions/StringRegExp.htm