Tclers

New feature in #Tcl9 – part 35: vwait - controlled by several new options Which one? Well, all! in Tcl 8.6 vwait did not have any options at all. Now, there are 🔟❗️Too many for a short post like this. Have a look yourself: 🔗 tcl-lang.org/man/tcl9.0/Tcl…

A gem in Tcl (version 8.5.0+): calculating with different bases. How would you add the hexadecimal number 3f and the binary number 100011 in Tcl? expr 0x3f+0b100011 The result is decimal: 98 You can also use this for quick conversion: expr 0x3f44d1 You get: 4146385

•March 26th, 2026: Registration opens •June 17th, 2026: Deadline for submissions of abstracts •June 19th, 2026: Notification of acceptance; tentative program •June 30th, 2026: Registration ends •July 15th, 2026: Meet & greet

Registration to the OpenACS and Tcl/Tk Conference 2026 is now open! The conference is in Vienna, Austria, July 16th - July 17th Here are the important dates:

You may know that Tcl can do this: set a 2; set b 5 return [expr {$a<$b ? 1 : 0}] It returns 1 when $a<$b, otherwise 0. But did you know that this works as well: return [expr {$a<$b ? -1 : $a>$b ? 1 : 0}] It will return -1 when $a<$b, 1 when $a>$b, else 0!

Looking for a language server (LSP) for Tcl with multi-editor support? This one seems pretty comprehensive: 🔗 github.com/bitwisecook/tc… From highlighting, call hierarchy, shimmer detection ... to code action and more, it is packed with features.

Well, of course you can easily build such a command in Tcl and learn a lot doing so.

Today's random page from the Tcler's Wiki: 🔗 wiki.tcl-lang.org/page/Block%2Dl… Tcl has global variables and variables that are local to procedures. Does it also have block variables, i.e. variables local to a block of code?

New feature in #Tcl9 – part 34: socket ... -nodelay ... -keepalive ... Network sockets can now be configured to set or query the TCP keepalive and nodelay options on the socket. Hmm, I have no useful example of this as I haven't actually used `socket` ...

That is what the new `-command` option is good for. You can provide a command that takes the matches (substrings) and does with them want you want to happen!

New feature in #Tcl9 – part 33: regsub -command ... — Generate the replacement for a regular expression by calling a command Sometimes, a simple `regsub` is not good enough. You may need to do more than just substituting matches into placeholders.

Lots of new features have been added, e.g. support for numbered lists, block quotes, tables, and HTML entities. See here for details: 🔗@dont-email.me%3E" target="_blank" rel="nofollow noopener">newsgrouper.org/%3C10o6d61$1u2…

Ruff!, the "Runtime function formatter" has released version 3.0.4 This library takes Tcl comments written into your source code and formatted mainly as markdown, and produces HTML documentation pages from this. 🔗 ruff.magicsplat.com

- 10 Tcl Commands Only a Few Bash Programmers Know Start here: 🔗medium.com/search?q=Tcl

There have been a few Tcl-related articles on 🔗 medium.com lately. If you have a subscription, you can read about: - Tcl: The Most Underrated, But The Most Productive Programming Language - Tcl vs. Bash: When Should You Choose Tcl?

lsearch -stride 3 {a A amen b B bank c C citron} c 6 Here, each three elements "a a amen", "b B bank" and so on are regarded as one group. Together with the `-index` option, you can search in any group element!

New feature in #Tcl9 – part 32: lsearch ... -stride ... — Search a list by groups of items [lsearch ...] is powerful. For flat lists, the -stride option in Tcl 9 can kind of pretend that your list is "nested". In fact, it groups a number of items and treat them as a unit:

- ... - Cookies, redirects, retries, challenge-response authentication handled automatically - Built-in proxy support - Non-blocking operation (even during name resolution) - Client side WebSockets, HTTP/2, TLS 2.0

Need another Tcl package to access web resources? Try www – version 2.9 🔗 chiselapp.com/user/schelte/r… - Pure Tcl package - Commands directly return requested data (no need to deal with tokens or cleanup) - ...

If you wonder why I say "bullshit" and not "hallucination" – here's why: 🔗 link.springer.com/article/10.100…