Regular Expressions 101

Save & Manage Regex

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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
Processing...

Test String

Substitution
Processing...

Code Generator

Language

Generated Code

re = /^(.+)\s+-\s+(.+?) +[fF](t|eat(uring)?)?\.?([^([\])\n]+)(.+)?$/m str = 'Carbin & Sirmark - Sorry featuring Sevener Kristjan Cash Cash - Take Me Home Feat. Bebe Rexha (Revoke Remix) Dj E-nergy C - 21 - My Super-hero track! feat Dj Ass-hole Flight Facilities - Heart Attack Feat. Owl Eyes (Snakehips Remix) Flight Facilities - Heart Attack Feat. Owl Eyes [Snake--hips Remix] Fedde Le Grand - Cinematic Fedde Le Grand Feat. Denny White - Cinematic Artist - Name - Track Name feat someone Artist Name - Track-Name feat someone Dj E- nergy C -21 - My Super-hero track! feat Dj Ass-hole Dj E-nergy C-21 - My Super-hero track!' subst = '$1 Feat.$5 - $2$6' 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