Tcl/Tk - Advanced Regular Expressions

Tcl/Tk module T247

Advanced Regular Expressions

Exercises, examples and other material relating to training module T247. This topic is presented on public courses Learning to program in Tcl, Tcl Basics

Tcl Programming - training course - The Tcl programming language, and Expect

Tcl Programming - The Tcl programming language, and Expect This course covers the fundamentals of the Tcl programming language. You'll learn about Tcl ...

http://www.wellho.net/course/tbfull.html [course]

Learning to Program in Tcl - training course - The Tcl programming language, and Expect

Learning to Program in Tcl - The Tcl programming language, and Expect This course covers the fundamentals of the Tcl programming language. You'll learn ...

http://www.wellho.net/course/tlfull.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]

Pattern Matching - a primer on regular Expressions

div class= introsubheads PATTERN MATCHING (OR HOW TO DO A LOOK LIKE) BR /div You can test a string against a pattern (known as a REGULAR EXPRESSION ...

http://www.wellho.net/solutions/php-patt ... sions.html [longer 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]

Tcl / regsub - changing a string and using interesting bits

Regexp matches a string to a regular expression, and regsub goes one further in that it replaces the found string with something else, saving the transformed ...

http://www.wellho.net/mouth/1410_Tcl ... -bits.html [short article]

Regular expressions are considerably enhanced in recent versions of Tcl, and this module, which assumes some prior knowledge of basic regular expressions, goes into advanced features such as groupings, sparse and greedy counts, and the Posix standard groups.

This topic is presented on public courses Learning to program in Tcl, Tcl Basics

Examples from our training material

T247.tcl	Tcl in use for CGI scripting
aretest	advanced regular expression match demo

Background information

Some modules are available for download as a sample of our material or under an Open Training Notes License for free download from http://www.training-notes.co.uk.

Topics covered in this module

Introduction.
What are advanced regular expressions?.
The working of a regular expression.
The elements of a regular expression.
Literal characters.
Assertions.
Character groups.
Counts.
Extensions.
A little more on regexp and regsub.
A further example.

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