Practical Programming in Tcl and Tk
by Brent Welch, Ken Jones
Publisher: Prentice Hall PTR 2003
Number of pages: 960
Practical Programming in Tcl and Tk is meant as a practical guide to help the readers get the most out of Tcl and Tk and avoid some of the frustrations. This book is meant to be useful to the beginner in Tcl as well as the expert. You are assumed to have some programming experience, although you should be able to get by even if you are a complete novice.
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by Salvatore Sanfilippo - invece.org
This book is an introduction to the main ideas of the Tcl programming language: If you wish to learn a simple and powerful programming language, this book is for you. The only prior knowledge needed is some basic understanding of programming.
by John K. Ousterhout - Addison-Wesley
The text takes a no-nonsense approach to the language, describing the elements of Tcl and Tk in programming-reference-style detail. If you are already familiar with a C-like language and want an introduction to Tcl and Tk, this is the book for you.
Tcl is a dynamic programming/scripting language based on concepts of Lisp, C, and Unix shells. It can be used interactively, or by running scripts which can use a package system for structuring. This book also discusses the GUI toolkit Tk.
by Clif Flynt, et al. - Tcl Developer Xchange
The tutorial is aimed at those who have some knowledge of programming, although you certainly don't have to be an expert. It is intended as a companion to the Tcl manual pages which provide a reference for all Tcl commands.