Tcl/Tk - String Handling in Tcl

String Handling in Tcl - Tcl/Tk module T205

The Tcl language is built around strings Ð everything is a string! In this module we look at basic string handling commands, the string command itself which provides a flexible selection of facilities, and we introduce regular expressions for pattern matching.

This topic is presented on public course Tcl Basics

Examples from our training material

ac_report	Complete example - Access log file analysis
apfo	format and append commands
brax	Literally matching round brackets in regular expressions
ccat	lappend and concat - the difference
datematch	Matching a date using a regular expression
dm2	A further date match example
hunter	Example of analysis of a log file
iconfinder	search for all icon references in a web log
match	String matching - using globbing
rematch	String matching using a regular expression
rf	Opening and reading a file
rf2	Using scan to get a field from a string
rf2a	Using scan's return value
stringinfo	Getting information from a text string
stringman	Manipulating a string

More web pages on this subject

Regular Expressions in Tcl

Opentalk forum discussions related to this topic

regexp for multi line matching
reg parsing
Regexp help
Difference between a binary string quot and a quot string
expect reading in a list
egrep from a variabl
String match to
Regular Expressions
No Split Words
Long String to ASCII
Help wanted for using quot Scan quot command
Decimal to Hexadecimal conversion

Pictures

String matching in Tcl

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

Basic string handling commands.
scan.
Append and format.
The string command.
Subcommands.
Indexes.
Informational subcommands.
Manipulating subcommands.
The match subcommand and globbing.
Putting string together.
Regular expressions.
The elements of a regular expression.
Literals.
Character sets.
Counts.
Anchors.
Groupings and Alternation.
Manipulating matched regular expressions.
Extracting from a match.
Match and substitute.
Putting it together.
Looking forward.

Complete learning

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