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Tcl/Tk 8.5 Programming Cookbook

You're reading from   Tcl/Tk 8.5 Programming Cookbook With over 100 recipes, this Cookbook is ideal for both beginners and advanced Tcl/Tk programmers. From the basics to creating applications, it‚Äôs full of indispensable tips and tricks to make the most of the language.

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Product type Paperback
Published in Feb 2011
Publisher Packt
ISBN-13 9781849512985
Length 236 pages
Edition 1st Edition
Languages
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Toc

Table of Contents (20) Chapters Close

Tcl/Tk 8.5 Programming Cookbook
Credits
About the Author
1. Acknowledgment
About the Reviewers
2. www.PacktPub.com
3. Preface
1. The Tcl Shell FREE CHAPTER 2. Using the Building Blocks Control Constructs 3. Error Handling 4. Handling String Expressions 5. Expanding String Functionality Using Lists 6. The Tcl Dictionary 7. File Operations 8. Tk GUI Programming with Tcl/Tk 9. Configuring and Controlling Tk Widgets 10. Geometry Management 11. Using Tcl Built-in Dialog Windows 12. Creating and Managing Menus 13. Creating the Address Book Application

Assigning values


In this section we will be creating a nested dictionary containing multiple entries for each record. By using the Tcl dict with command we will then assign variables in the body of our script that are based on the keys stored within our dictionary. The dict with command allows us to accomplish this by assigning entries within our dictionary to variables and then executing a script. The syntax is as follows:

dict with name keys… script

How to do it…

In the following example, we will create a nested dictionary to hold a collection of key/value pairs and then using the dict for and with commands we will execute a script to output the values to the screen. Return values from the commands are provided for clarity. Enter the following command:

% set person1 [dict create firstname John lastname Smith title Manager]
firstname John lastname Smith title Manager
% set person2 [dict create firstname Mary lastname Jones title Developer]
firstname Mary lastname Jones title Developer}...
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