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For 2021 - online Python 3 training - see ((here)).

Our plans were to retire in summer 2020 and see the world, but Coronavirus has lead us into a lot of lockdown programming in Python 3 and PHP 7.
We can now offer tailored online training - small groups, real tutors - works really well for groups of 4 to 14 delegates. Anywhere in the world; course language English.

Please ask about private 'maintenance' training for Python 2, Tcl, Perl, PHP, Lua, etc.
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 articles
T245 - Tcl/Tk - [incr-Tcl]
  [656] Think about your design even if you don't use full UML - (2006-03-24)
  [1528] Object Oriented Tcl - (2008-02-02)
  [1819] Calling base class constructors - (2008-10-03)
  [1925] Introduction to Object Oriented Programming - (2008-12-06)
  [3142] Private and Public - and things between - (2011-01-22)
  [4456] Objects in Tcl - iTcl - updated first steps example - (2015-03-11)
  [4460] Using Object Oriented Tcl and the Tk toolkit together - real life example - (2015-03-12)


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This is a page archived from The Horse's Mouth at http://www.wellho.net/horse/ - the diary and writings of Graham Ellis. Every attempt was made to provide current information at the time the page was written, but things do move forward in our business - new software releases, price changes, new techniques. Please check back via our main site for current courses, prices, versions, etc - any mention of a price in "The Horse's Mouth" cannot be taken as an offer to supply at that price.

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