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

Language

Generated Code

re = /\s*\b\d+\b\s*/m str = '0 I64 EB MM 93 1519 KINGSCROSS RD 28 VA288 298 JOHN RANDOLPH RD 4700 WALMSLEY BL BOWLING GREEN RD / BOB WHITE RD BRUCE CT /FLORIDA AV BUCK RD AND WHITEHALL RD DOWNTOWN EWRESSWY EB 2ND ST HYHLAND VISTA / GEORGE WASHINGTON BL HYHLAND VISTA / GEORGE WASHINGTON BL HYHLAND VISTA DR / GEORGE WASHINGTON BL I95 25 43 LAUARL RIDGE MILL RD /CLARENCE RD LAUARL RIDGE MILL RD /CLARENCE RD NOVAH HOWARD ST /SEMINARY RD OLD COUVAHOUSE RD R COUVAHOUSE RD OLD COUVAHOUSE RD R COUVAHOUSE RD WOODLAND AND ROANOKE 1501 SAMS CR1 15281 WHITEHEAD RD 1532 MARLBORO ST 16907 BRANDERS BRIDGE RD 1750 WILLIAM ST' subst = '' 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