Example General Resource Tools

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Expresso editor
What functions are offered by Expresso editor? The award-winning Expresso editor is equally suitable as a teaching tool for the beginning user of regular expressions or as a full-featured development environment for the experienced programmer or web designer with an extensive knowledge of regular ex... 2013-01-25, ∼4758🔥, 0💬

White space character class - \s
What is abbreviation of a character class of all white space ASCII characters? How to write a regular expression using a character class abbreviation to capture all white space characters in a text string like this: Name: Jack; Age: 25; City: Paris ? The predefined abbreviation of a character class ... 2013-01-23, ∼4737🔥, 0💬

Does negative character class match newline
Does negative character class [^a] match newline characters? How to write a regular expression to capture tags and attributes from this HTML code: A negative character class will match the newline character, if the newline character is not listed in the class. For example, "[^a]" will match the newl... 2013-02-02, ∼4722🔥, 0💬

"non-greedy" on quantified subpatterns +? *? {}?
How turn off the the greediness of quantified subpatterns? I want the quantified subpattern to be matched the minimum number of times possible? How to create a "non-greedy" quantified subpattern on this PHP script: if ($t=10): echo "Just started...!"; endif; if ($t=11): echo "Hungry!"; endif; if ($t... 2013-01-26, ∼4703🔥, 0💬

Capturing response message size from Apache Web log file
How to capture the response message size from Apache Web log file? Here are some Apache Web log file entries: 127.0.0.1 - frank [10/May/2012:13:55:36 -0700] "GET /apache_pb.gif HTTP/1.0" 200 2326 "-" "-" "-" 213.135.131.79 - - [13/May/2012:17:35:32 -0600] "POST /submit.jsp HTTP/1.0" 200 1024 "-" "-"... 2013-02-04, ∼4686🔥, 0💬

regex.FYIcenter.com Links
Other Resources: Software QA Resources Developer Resources DBA Resources Windows Tutorials Java JAR Files DLL Files File Extensions Security Certificates Regular Expression Link Directories Interview Q &amp; A Biotech Resources Cell Phone Resources Travel Resources Frequently Asked Questions FYI... 2025-03-17, ∼4652🔥, 0💬

Positive look-behind assertion (?<=...)
What is a positive look-behind assertion? How to use it? How to write a regular expression to find words ending with 'oo' in text like: how, too, bamboo, school, ? A positive look-behind assertion is a zero-width assertion that allows you to match a subpattern left to the current position (look-behi... 2013-01-31, ∼4630🔥, 0💬

Negated decimal digit character class - \D
What is abbreviation of a negated character class of all decimal digits? Does it represents any characters except decimal digits? How to write a regular expression using a character class abbreviation to capture letters from a Canadian postal code string: L3R 9Z7 ? The predefined abbreviation of a n... 2013-01-23, ∼4609🔥, 0💬

Regular-Expressions.info
What resources are offered at Regular-Expressions.info? Regular-Expressions.info is the premier website about Regular Expressions offering Complete Regular Expression Tutorial and Applications & Languages That Support Regexes. Regular-Expressions.info 2013-01-26, ∼4601🔥, 0💬

Comments in regular expression (?#...)
Is there any way to enter a comment into regular expressions? How to write a regular expression with comments to match date strings in yyyy-mm-dd format like: 2013-01-26 Yes. Comments can be entered in regular expressions using (?#...) format. For example: "(?:[^"\]++(?#no-backtracking) |\.)*+(?#no-b... 2013-01-26, ∼4593🔥, 0💬

Regex Coach
What functions are offered by Regex Coach? The Regex Coach is a graphical application for Windows which can be used to experiment with (Perl-compatible) regular expressions interactively. It has the following features: It shows whether a regular expression matches a particular target string. It can ... 2013-01-25, ∼4559🔥, 0💬

Negated word character class - \W
What is abbreviation of a negated character class of all word characters? Does it represents any characters except alphanumeric plus '_' characters? How to write a regular expression using a character class abbreviation to capture all sequences of non word characters in a PHP script code like this: ... 2013-01-23, ∼4534🔥, 0💬

PHP Regular Expressions (Perl-Compatible)
I am using regular expressions in PHP scripts and need to look at reference document frequently. If you are writing PHP scripts and using regular expressions, you need to bookmark this PHP official reference document: "Regular Expressions (Perl-Compatible)" . Topics covered in "Regular Expressions (... 2013-01-22, ∼4534🔥, 0💬

Using character class [...]
What is a character class? How to specify a character class in a regular expression? How to write a regular expression using character classes to capture 7 digits phone numbers from this example string " 123-4567, 123 4567 or 1234567 "? A character class allows a set of possible characters, rather t... 2013-02-02, ∼4530🔥, 0💬

PCRE - Perl Compatible Regular Expressions
What is PCRE (Perl Compatible Regular Expressions)? The PCRE library is a set of functions that implement regular expression pattern matching using the same syntax and semantics as Perl 5. PCRE has its own native API, as well as a set of wrapper functions that correspond to the POSIX regular express... 2013-01-25, ∼4519🔥, 0💬

REGex TESTER
What functions are offered by REGex TESTER? REGex TESTER site allows you to do a regex test, i.e. it utilizes JavaScript (AJAX) to instantly validate regular expressions (regex), by searching and replacing strings in a text based on the regular expression. The result is live, it is updated instantly... 2013-01-25, ∼4517🔥, 0💬

regex.larsolavtorvik.com
What functions are offered by regex.larsolavtorvik.com? regex.larsolavtorvik.com is a regular expression online testing tool with PHP PCRE, PHP POSIX, JavaScript engines. regex.larsolavtorvik.com 2013-01-25, ∼4512🔥, 0💬

Parsing all elements of URL addresses
How to parse out all elements from URL addresses with a regular expression? Here are URL address examples: ftp://ftp.example.org/ https://login.example.com:5800 /?mode=guest&lang=enhttp://www.google.com:80/api/e xample/submit.php?name=joe#newfile://localhost/c|/WINDOWS/do cument.html#chapter1URL... 2013-02-03, ∼4505🔥, 0💬

perlre - Perl regular expressions reference document
I am using regular expressions in Perl scripts and need to look at reference document frequently. If you are writing Perl scripts and using regular expressions, you need to bookmark this Perl official reference document: "perlre - Perl regular expressions" . Even if you are using regular expressions... 2013-01-22, ∼4496🔥, 0💬

Negated white space character class - \S
What is abbreviation of a negated character class of all white space ASCII characters? Does it represents any characters except white space characters? How to write a regular expression using a character class abbreviation to capture tokens separated by white space characters in a text string like t... 2013-01-23, ∼4486🔥, 0💬

Single line modifier - s
What is the single line modifier? How to use it? How the single line modifier can be used on this example text: class Hello { public static void main(String[] args) { System.out.println("Hello World!"); // Display the string. } } The single line modifier 's', also called "dot all" modifier, modifies... 2013-02-02, ∼4450🔥, 0💬

Parsing directory entries from Windows "dir" command
How to write a regular expression to parse sub directory entries from the output of Windows "dir" command? Here is an example output of the "dir" command: Directory of C:\Windows 12/15/2012 09:24 AM . 12/15/2012 09:24 AM .. 07/13/2009 11:52 PM addins 01/19/2012 10:48 AM AppCompat 11/29/2012 09:16 AM... 2013-02-01, ∼4441🔥, 0💬

Positive look-ahead assertion (?=...)
What is a positive look-ahead assertion? How to use it? How to write a regular expression to find words with 'oo' in text like: how, to, look, google, school ? A positive look-ahead assertion is a zero-width assertion that allows you to match a subpattern beyond the current position (look-ahead) wit... 2013-01-26, ∼4351🔥, 0💬

RegexAdvice.com
What resources are offered at RegexAdvice.com? You'll find regular expression forums and blogs here at RegexAdvice.com. If you're looking for help with a particular expression, check out the Construction Advice forum. You should also search for regular expressions in the regular expression library. ... 2013-01-25, ∼4350🔥, 0💬

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Example General Resource Tools