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FE (Freedom Environment) System - Tcl-Tk 'wish' interpreter Stack …
http://www.freedomenv.com/TkGooies/WishStackTraceExamples/tcltkWishStackTraceExamples.htm
The 'stack trace' system of the 'wish' (window shell) interpreter is particularly good at helping you catch those 'typos' in short order. --- One of the more difficult error situations to pin-point is the case of a missing closing (right) brace.
stack - Tcl Data Structures
https://www.tcl.tk/community/tcl2004/Tcl2003papers/kupries-doctools/tcllib.doc/struct/stack.html
The following commands are possible for stack objects: stackName clear Remove all items from the stack. stackName destroy Destroy the stack, including its storage space and associated command. stackName peek ? count? Return the top count items of the stack, without removing them from the stack. If count is not specified, it defaults to 1.
Tcl/TK Stopwatch Time tracker - Stack Overflow
https://stackoverflow.com/questions/7799373/tcl-tk-stopwatch-time-tracker
I'm working on a task tracking program for my job. It is modified from stopwatch. It's basic function is to visually keep track of the time each task takes, record it into a text file and zero the clock. Here is a screenshot of the program as it sits now. The buttons and labels are placed using grid like so:
More Debugging - trace - Tcl
https://tcl.tk/man/tcl8.5/tutorial/Tcl37.html
More Debugging - trace. When you are debugging Tcl code, sometimes it's useful to be able to trace either the execution of the code, or simply inspect the state of a variable when various things happen to it. The trace command provides these facilities. It is a very powerful command that can be used in many interesting ways.
trace manual page - Tcl Built-In Commands
http://tcl.tk/man/tcl8.5/TclCmd/trace.htm
Tcl will always remove the command once the trace is complete. Recursive renaming or deleting will not cause further traces of the same type to be evaluated, so a delete trace which itself deletes the command, or a rename trace which itself renames the command will not cause further trace evaluations to occur.
ttrace manual page - Threading - tcl.tk
https://www.tcl.tk/man/tcl/ThreadCmd/ttrace.html
It relies on the mechanics of Tcl command tracing and the Tcl unknown command and mechanism . The package requires Tcl threading extension but can be alternatively used stand-alone within the AOLserver, a scalable webserver from America Online . In a nutshell, a short sample illustrating the usage of the ttrace with the Tcl threading extension:
catch manual page - Tcl Built-In Commands
https://www.tcl.tk/man/tcl/TclCmd/catch.htm
The catch command calls the Tcl interpreter recursively to execute script, and always returns without raising an error, regardless of any errors that might occur while executing script . If script raises an error, catch will return a non-zero integer value corresponding to the exceptional return code returned by evaluation of script.
trace | tcl_tk | API Mirror
https://apimirror.com/tcl_tk/tclcmd/trace.htm
Tcl will always remove the command once the trace is complete. Recursive renaming or deleting will not cause further traces of the same type to be evaluated, so a delete trace which itself deletes the command, or a rename trace which itself renames the command will not cause further trace evaluations to occur.
trace - Tcl
http://wookie.tcl.tk/1505
Donald Arseneau: Yes, write traces fire after the variable has already been set, so if you want validation of variables' values, in analogy with Tk's entry validation, then you must maintain shadow copies of the previous values, in order to undo improper settings. Triggering Traces when using a variable at the C level edit. On comp.lang.tcl, Kevin Kenny answers someone wanting to …
Contents Tcl/Tk Reference Guide - cheat sheets
http://www.cheat-sheets.org/saved-copy/TclTk_quickref.pdf
Tcl/Tk Reference Guide tcl_precision Number of significant digits to retain when converting floating-point numbers to strings (default 12). tcl_traceCompile Level of tracing info output during bytecode compilation. tcl_traceExec Level of tracing info output during bytecode execution. tcl_version Current version of Tcl interpreter. 3.
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