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

/
/
gmi

Test String

Substitution

Processing...

Code Generator

Language

Generated Code

re = /^.*(([\w\d]{5}-?){3}).*$/mi str = '12 DIG ARTIFEX Bundle 3 9 Clues 2: The Ward STEAM 5MQ7W-N7PAT-V0QQL YES Mark as used 13 DIG ARTIFEX Bundle 3 9 Clues: The Secret of Serpent Creek STEAM PEMFX-48T80-20ANW YES Mark as used 14 DIG Super Bundle 76 HellAngel STEAM FENFR-LQ0N3-TNLR0 YES Mark as used 1 DIG Points Purchase Monsti STEAM BCI7T-Z9P4Q-LGJ9T YES Mark as used 2 DIG Super Bundle 74 Wooden Floor 2 - Resurrection STEAM LPL6L-2LJ74-GWG3W YES 3 DIG Super Bundle 74 Warriors of Vilvatikta STEAM 90LPI-T5KC2-C4W6M YES 4 DIG Super Bundle 74 Final Quest STEAM IJRID-JYGH3-3M5C7 YES 5 DIG Super Bundle 74 Gold Rush! - Anniversary STEAM 6D7DA-8EZZP-DET6A YES 6 DIG Super Bundle 75 Sleeping Valley STEAM 8AFHR-C0X43-DAG74 YES ' subst = '$1' result = str.gsub(re, subst) # Print the result of the substitution puts 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 Ruby, please visit: http://ruby-doc.org/core-2.2.0/Regexp.html