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

/
/
g

Test String

Substitution

Processing...

Code Generator

Language

Generated Code

re = /(\d),(\d)(?!(([^"]+"){2})*[^"]+$)/ str = '1,Hershey\'s,10268,1305178,Reese_Core_THC_FY_Brand_Campaign_2023,video,in-app,Mobile In-App Video,3,RELATED_PINS,"32,860",98.40%,0,0,0.00%,0,0.00%,0,0.00%,0,0.00%,533,1.60%,1.60%,"32,860","33,393",0.70%,"4,710,648",99.30%,"4,744,041","4,744,041" 2,Hipp GmbH & Co. Vertrieb KG,16800,1546599,ES151635_HiPP_FoMi Flight 2 2023_CPCV,video,in-app,Mobile In-App Video,3,RELATED_PINS,"29,758",98.12%,0,0,0.00%,0,0.00%,0,0.00%,0,0.00%,569,1.88%,1.88%,"29,758","30,327",3.08%,"954,365",96.92%,"984,692","984,692" 3,Kimberly Clark,3751,1554555,KK_KHW_226_KOT_RCH-ST_Q3 23_HWL_P2DNXD0_P18-39_OFH,video,in-app,Mobile In-App Video,3,RELATED_PINS,"24,727",98.28%,0,0,0.00%,0,0.00%,0,0.00%,0,0.00%,433,1.72%,1.72%,"24,727","25,160",0.64%,"3,898,750",99.36%,"3,923,910","3,923,910" 4,Kimberly Clark,3751,1554527,KK_CFT _303_HUG_RCH_Q3 23_CFT _P2DNR3G_AB_EST,display,in-app,Mobile App,3,RELATED_PINS,"23,963",98.78%,0,0,0.00%,0,0.00%,0,0.00%,0,0.00%,295,1.22%,1.22%,"23,963","24,258",0.57%,"4,229,318",99.43%,"4,253,576","4,253,576" 5,Kimberly Clark,3751,1554527,KK_CFT _303_HUG_RCH_Q3 23_CFT _P2DNR3G_AB_EST,display,in-app,Mobile In-App,3,RELATED_PINS,"23,963",98.78%,0,0,0.00%,0,0.00%,0,0.00%,0,0.00%,295,1.22%,1.22%,"23,963","24,258",0.57%,"4,229,318",99.43%,"4,253,576","4,253,576" 6,Bayer Vital GmbH,17072,1268855,2023_03_DE_Lefax-Intens_Consumer_Tactical_Social_Intens_PO2151230403,video,in-app,Mobile In-App Video,3,RELATED_PINS,"21,697",98.23%,0,0,0.00%,0,0.00%,0,0.00%,0,0.00%,390,1.77%,1.77%,"21,697","22,087",3.88%,"547,359",96.12%,"569,446","569,446" 7,Ferrero DE (FERRERO MSC GmbH & Co. KG),13924,1531938,DE_W25_W28_FY23_IYO_DigitalVideoI_AWE_CI~69374_Aktion-Pinterest-IYO-TIII-FY2223-DigitalVideo-StandardVideo_Awareness_Auction,video,in-app,Mobile In-App Video,5,HOME_FEED,"20,938",98.13%,0,0,0.00%,0,0.00%,0,0.00%,0,0.00%,400,1.87%,1.87%,"20,938","21,338",2.22%,"940,902",97.78%,"962,240","962,240" 8,Pernod Ricard UK,8897,1556116,BRE_FLIP_Summer24_W1_07-22_views_soc_product-launch_pin_GBR_omnet_x_x,display,in-app,Mobile App,3,RELATED_PINS,"19,536",98.16%,0,0,0.00%,0,0.00%,0,0.00%,0,0.00%,366,1.84%,1.84%,"19,536","19,902",1.50%,"1,305,872",98.50%,"1,325,774","1,325,774" 9,Pernod Ricard UK,8897,1556116,BRE_FLIP_Summer24_W1_07-22_views_soc_product-launch_pin_GBR_omnet_x_x,display,in-app,Mobile In-App,3,RELATED_PINS,"19,536",98.16%,0,0,0.00%,0,0.00%,0,0.00%,0,0.00%,366,1.84%,1.84%,"19,536","19,902",1.50%,"1,305,872",98.50%,"1,325,774","1,325,774"' subst = '$1$2' 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