Tolchz.net

I’m really looking forward to QtConcurrent which will be in Qt 4.4; so I downloaded a Qt snapshot to try it out.

You can download all of the example code I wrote here, Qt Concurrent Examples
Continue reading ‘Multi-Threaded Programming with QtConcurrent’ »

I finally got around to writing a major mode for Qt .pro and .pri files. It doesn’t provide any indenting features; only font locking.

Just load it up and add the following to your .emacs

(require ‘qt-pro)
(add-to-list ‘auto-mode-alist ‘(“\\.pr[io]$” . qt-pro-mode))

Get it here qt-pro.el

When you spend most of your day in Emacs, it can be annoying to switch to something else for a text oriented task. With weblogger.el you can post to your blog without ever leaving Emacs.

I have WordPress installed, but it should work for any other blogging software with the same XMLRPC interface.

Continue reading ‘Posting to WordPress with Emacs (weblogger.el)’ »

I ran across something weird the other day. I had assumed that the return type of an overriding function must be identical to the function that it is overriding. The C++ Standard allows one specific exception to this rule that could possibly come in handy to save some unnecessary casting.
Continue reading ‘Covariant Return Types’ »

Several years ago I put up a /etc/passwd script that generates a passwd file full of random usernames with hashes of random floating point numbers for the password. You can see the script in action at http://tolchz.net/etc/passwd . Hit reload a few times to get the full effect.

I’ve recently found several forums that have “users” asking how to crack the passwd file found on my site….

American Site (The user seems to think it is a Windows password file)
German Site
Czech Site
Russian Site

While modifying a remote file with netrw under Windows I ran into a problem upon trying to write the file.

scp -q "VIMD72e7.tmp" "host:/path/to/file.txt"
VIMD7E7.tmp: No such file or directory
shell returned 1
Hit any key to close this window...

I think that this is a result of the autochdir option being set. My fix is to do a

:lcd $TEMP

in the buffer with the remote file loaded prior to writing the file. This lets scp find the temporary file and the copy/write succeeds.

Quick falling snow hack with Python and Pygame. Snow eventually accumulates and fills the screen…

Falling Snow Source

• http://caml.inria.fr/pub/docs/manual-ocaml/libref/index.html
  Standard Library Reference for OCaml
  (tags: caml functional ocaml reference Programming api)

• The Objective-Caml system, release 3.09
  This manual documents the release 3.09 of the Objective Caml system. It is organized as follows.
  * Part I, “An introduction to Objective Caml”, gives an overview of the language.
  * Part II, “The Objective Caml language”, is the reference
  (tags: ocaml programming reference manual documentation functional caml)
• Developing applications with Objective Caml
  (tags: book functional programming reference ocaml caml)
• Using, Understanding, and Unraveling The OCaml Language From Practice to Theory and vice versa
  (tags: book functional programming reference ocaml)

When starting up SLIME (M-x slime) I’m getting a hangup error:

;; Swank started at port: 36773.
36773
* 
Process inferior-lisp hangup

From searching, this appears to be a problem with Emacs and my version of the Linux Kernel (2.6.8). The workaround is apparently to set the inferior lisp to “nohup sbcl” which prevents SBCL from receiving the hangup signal. Unfortunately it also redirects STDOUT/STDIN which seems to cause a problem with the SLIME from CVS.

The solution that I’ve found is to start swank (the Lisp portion of SLIME) manually in SBCL.

; Load swank
(load "/path/to/swank-loader.lisp")
 
; Start the swank server
(swank:create-server)

Then in Emacs start SLIME with M-x slime-connect, the defaults of Host: 127.0.0.1 and Port: 4005 should be fine.