September 2009
Intermediate to advanced
816 pages
19h 38m
English
Content preview from Tcl and the Tk Toolkit, Second Edition
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9. Procedures
A Tcl procedure is a command that you define with a Tcl script. You can define new procedures at any time with the proc command described in this chapter. Procedures make it easy for you to package solutions to problems so that they can be reused easily.
Tcl also provides special commands for dealing with variable scopes. Among other things, these commands allow you to pass arguments by reference instead of by value and to implement new Tcl control structures as procedures.
9.1 Commands Presented in This Chapter
The following Tcl commands relate to procedures and variable scoping:
• proc name argList body
Defines a procedure whose name is name, replacing any existing command by that name. argList is a list with one element for ...
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