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 = /(ENERGIA ELETRICA CONSUMO(.|\n)*?%)/m str = '"5758 6128 370 kWh 1 370 kWh 11,93 kWh 12/07/2019 01/08/2019 Mês kWh Dt.Pgto. Valor 06/2019 355 17/06/2019 343,79 NOTA FISCAL/CONTA DE ENERGIA ELÉTRICA N° 085.976.711 - SÉRIE B Emitida em 03/07/2019 05/2019 332 14/05/2019 306,84 Produto Valor Valor Base Aliq. 04/2019 415 29/05/2019 378,67 Descrição Un. Consumo Unitário Total Cálc. ICMS 03/2019 308 14/05/2019 269,81 ENERGIA ELETRICA CONSUMO kWh 370 0,787324 291,31 291,31 29,00% 02/2019 347 26/04/2019 305,09 ENERGIA CONS. B.AMARELA kWh 0,54 0,54 29,00% 01/2019 341 11/03/2019 324,39 12/2018 301 26/12/2018 287,83"' 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