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

r"
"
gm

Test String

Substitution

Processing...

Code Generator

Language

Generated Code

use strict; my $str = '\'MLS Number\\n2201211\\nCounty\\nCass\\nCity\\nRaymore\\nSub Div\\nEvan Brook\\nType\\nSingle Family\\nFloor Plan Description\\nSplit Entry\\nBdrms\\n4\\nBaths Full\\n3\\nBaths Half\\n0\\nAge Description\\n16-20 Years\\nYear Built\\n2003\\nSqft Main\\n1500\\nSQFT MAIN SOURCE\\nOwner\\nBelow Grade Finished Sq Ft\\n500\\nBelow Grade Finished Sq Ft Source\\nOwner\\nSqft\\n2000\\nLot Size\\n115x130\\nSchool District\\nRaymore-Peculiar\\nLegal Description\\nEVAN-BROOK LOT 184\\nS Terms\\nConventional\', \'Fireplace?\\nY\\nFireplace Description\\nFamily Room\\nBasement\\nY\\nBasement Description\\nConcrete, Finished, Walk Out\\nDining Area Description\\nKit/Dining Combo\\nUtility Room\\nOff The Kitchen, Laundry Room\\nOther Room\\nFamily Room\\nInterior Features\\nKitchen Island, Painted Cabinets, Vaulted Ceiling, Walk-In Closet, Whirlpool Tub, Wood Floor\\nEquipment\\nCeiling Fan(s), Dishwasher, Disposal, Gar Door Opener(s), Rng/Oven- Electric, Refrigerator, Stainless Appliances\', \'Rooms\\nLiving Room\\nLevel 1\\nKitchen\\nLevel 1\\nLiving Rm- 2nd\\nLevel B\\nBathroom Full\\nLevel 1\\nMaster Bedroom\\nLevel 1\\nMaster Bathroom\\nLevel 1\\nSecond Bedroom\\nLevel 1\\nThird Bedroom\\nLevel 1\\nFourth Bedroom\\nLevel B\\n2nd Full Bath\\nLevel B\', \'Garage/Parking?\\nY\\nGarage/Parking #\\n3\\nGarage Description\\nAttached, Side Entry\\nConstruction\\nFrame\\nArchitecture\\nTraditional\\nRoof\\nComposition\\nLot Description\\nCorner Lot\\nIn Floodplain\\nNo\\nExterior Features\\nDeck, Fence- Wood, Porch, Storage Shed\', \'Central Air\\nY\\nHeat\\nForced Air Gas\\nCool\\nCentral Electric\\nWater\\nCity/Public\\nSewer\\nCity/Public\' '; my $regex = qr/(?m)\s*'\s*(.*?)\s*'\s*(?:,\s*|$)/mp; my $subst = '\\1\\\\n'; my $result = $str =~ s/$regex/$subst/rg; print "The result of the substitution is' $result\n";

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 Perl, please visit: http://perldoc.perl.org/perlre.html