For 2023 - we are now fully retired from IT training.
We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk.
Lisa and I (Graham) now live in what was our training centre in Melksham - happy to meet with former delegates here - but do check ahead before coming round. We are far from inactive - rather, enjoying the times that we are retired but still healthy enough in mind and body to be active!
I am also active in many other area and still look after a lot of web sites - you can find an index ((here))
Object Orientation in Tcl - [incr-Tcl]
For medium sized to huge projects, an Object Oriented approach to programming can pay massive dividends at (perhaps) the initial cost of a longer design phase and class testing.
Tcl is the oldest of the Open Source languages that we offer courses on, and it's a command based language that was written around structured programming techniques. Is it Object Oriented, then? Not as such - although the Tk GUI uses something that's rather akin to an object for each widget.
The [incr-Tcl] extension to Tcl provides a way of adding a true, full OO capability to Tcl. It's automatically provided these days as part of the ActiveState Distribution of Tcl
, and it comes with most of the Linux and Unix distributions too. And it's a well implemented OO capability that extends Tk's widget philosophy. It even includes multiple inheritance if you need that sort of complexity.
I've put a short [incr-Tcl] example
into our solutions centre
... and articles on other difficult-to-answer questions there and also in the [incr-Tcl] training module examples
[incr-Tcl] is briefly covered on our Tcl Basics
course, and we can provide additional coverage as necessary via Extra days
or on private courses (written 2005-04-24, updated 2006-06-05)
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articlesT245 - Tcl/Tk - [incr-Tcl] 
Think about your design even if you don't use full UML - (2006-03-24) 
Object Oriented Tcl - (2008-02-02) 
Calling base class constructors - (2008-10-03) 
Introduction to Object Oriented Programming - (2008-12-06) 
Private and Public - and things between - (2011-01-22) 
Objects in Tcl - iTcl - updated first steps example - (2015-03-11) 
Using Object Oriented Tcl and the Tk toolkit together - real life example - (2015-03-12)
Some other Articles
Python generator functions, lambdas, and iteratorsCourse follow-upsElegant languages - Perl, PHP, PythonWhy are we no. 404Object Orientation in Tcl - [incr-Tcl]MP for Devizes, WiltshireColour blindness for web developersChecking that all our servers are up and accessibleAutomating regular manual proceduresWhat career opportunities for web designers
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This is a page archived from The Horse's Mouth at
the diary and writings of Graham Ellis.
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