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

Code Generator

Language

Generated Code

use strict; my $str = ' mmSuggestDeliver(0, new Array("Name", "Category", "Keywords", "Bias", "Extension", "IDs"), new Array(new Array("HSBC Holdings plc (Spons. ADRs)", "Stocks", "HSBC|US4042804066|HSBC||", "75", "", "hsbc|HSBC|1|4917"),new Array("HSBC Holdings plc", "Stocks", "|GB0005405286|||HSBA", "75", "", "hsbc-gb0005405286||1|1046"),new Array("HSBC Trinkaus & Burkhardt AG", "Stocks", "|DE0008115106|||TUBG", "75", "", "hsbc_trinkausburkhardt||1|3774"),new Array("HSBC Bank Malta Plc Registered Shs", "Stocks", "|MT0000030107|||", "75", "", "hsbc_bank_malta||1|16831644"),new Array("HSBC-D7 SA de CV SIID (A)", "Stocks", "|MX51HS0Q00E8|||", "75", "", "hsbc-d7||1|5125971"),new Array("HSBC US Buy-Out GmbH & Co. KGaA", "Stocks", "|DE000A0MM6H7|||", "75", "", "hsbc_us_buy-out_gmbhco||1|23145"),new Array("HSBC Holdings PLC ADR Cert Deposito Arg Repr 0.5 ADRs", "Stocks", "|ARDEUT112257|||", "75", "", "hsbc_2||1|1399269"),new Array("HSBC Holdings PLC6.2 % Pfd Shs Sponsored American Deposit Repr 1/40th 6.2 % PfdShs Ser -A-", "Stocks", "HSBC.PA|US4042806046|HSBC.PA||", "75", "", "hsbc-pa|HSBC.PA|1|19327"),new Array("HSBC Holdings PLC 8 % Perp Sub Cap Secs 2010-Without Fixed Maturity Series -2-", "Stocks", "HSEB|US4042808026|HSEB||", "75", "", "hseb|HSEB|1|5083319"),new Array("HSBC Holdings PLC 8 1-8 % Perpetual Sub Cap Secs 2008-Exch into Non-Cum Dollar Pref Shs", "Stocks", "HSEA|US4042807036|HSEA||", "75", "", "hsea|HSEA|1|3782270")), 10, 0);'; my $regex = qr/\bnew\s+Array\s*[(]\s*(".*?)(?=[)]\s*,\s*new\s+Array|\s*[)]\s*[)]\s*[^(]+$)/mp; if ( $str =~ /$regex/g ) { print "Whole match is ${^MATCH} and its start/end positions can be obtained via \$-[0] and \$+[0]\n"; # print "Capture Group 1 is $1 and its start/end positions can be obtained via \$-[1] and \$+[1]\n"; # print "Capture Group 2 is $2 ... and so on\n"; } # ${^POSTMATCH} and ${^PREMATCH} are also available with the use of '/p' # Named capture groups can be called via $+{name}

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