Tcl/Tk 8.5 Programming Cookbook

Appending to a dictionary

One way of adding key/value pairs to a dictionary is the dict append command. The syntax is as follows:

	dict append name key value…

How to do it…

In the following example, we will create a dictionary containing a set of key/value pairs and then append an additional set. Return values from the commands are provided for clarity. Enter the following command:

% set names [dict create 1 John 2 Mary 3 Paul]
1 John 2 Mary 3 Paul
% dict append names 4 Fred
1 John 2 Mary 3 Paul 4 Fred

How it works…

The dict append command appends a key and value pair (or pairs) to the dictionary referenced by name.