Exercises, examples and other material relating to training module Q803. This topic is presented on public course Regular Expressions

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Regular Expressions - training course - Making the most of Pattern Matching Regular Expressions - Making the most of Pattern Matching Regular expressions are probably the most powerful pattern matching tools that is available. ... http://www.wellho.net/course/refull.html  [course]

Ignore case in Regular Expression Do you want to ignore case in a regular expression? There are a variety of ways of doing it ... depending on the language you're writing. Here are ... http://www.wellho.net/mouth/1336_Ign ... ssion.html  [short article]

Matching within multiline strings, and ignoring case in regular expressions Regular Expressions are powerful matching tools and you can specify almost anything within them. But there are certain facilities that are naturally ... http://www.wellho.net/mouth/943_Matc ... sions.html  [short article]

Regular expression for 6 digits OR 25 digits I can write a regular expression to match ANY number of digits between 6 and 25 ... ^[[:digit:]]{6,25}$ but how would I write a regular expression to ... http://www.wellho.net/mouth/1613_Reg ... igits.html  [short article]

Finding words and work boundaries (MySQL, Perl, PHP) If you're searching for the word "mile", you probably don't want the page that tells you that Sally Smiled at Harry. But you may want to find a Milestone, ... http://www.wellho.net/mouth/1735_Fin ... -PHP-.html  [short article]

Seven new intermediate Perl examples From the "learning to program in Perl" course I'm running this week, I am pleased to present seven new examples ... written during the course, in front ... http://www.wellho.net/mouth/1860_Sev ... mples.html  [short article]

Replacing the last comma with an and If I have a list, I'm likely to want to present it comma separated for the most part, but with the word "and" between the last two elements. "Cambridge, ... http://www.wellho.net/mouth/1601_Rep ... n-and.html  [short article]

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As well as matching a pattern, a regular expression can be used to filter out part of a string. This is a very powerful feature, but then you'll also need to learn about capture brackets, sparse and greedy matches, modifiers and more.

This topic is presented on public course Regular Expressions

bref	Back References
isbn	Testing validity of ISBN number, including check digit
pcode	Perl - match and extract from a postcode