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spam rules

By Hal Canary

These are my new spamassassin rules. If your configured email client fails to have a valid DKIM or DK signature or SPF record, I’m probably going to mark you as spam.

#### .spamassassin/user_prefs
required_score -1.0
score DKIM_VALID_AU -10.0
score SPF_PASS -5.0

99% of my legitimate correspondents are okay already.

Hal Canary | Computers & Code, Life | 2011-10-26 15:01:41 UTC
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change-epub-formatting.py

By Hal Canary
#!/usr/bin/python
#DTPD#
import subprocess
import os.path
import sys
import glob

def fixfile(in_file_name):
  ebookconvert = r'C:\PROGRA~2\Calibre2\ebook-convert.exe'
  #ebookconvert = '/usr/bin/ebook-convert'
  base = os.path.basename(in_file_name)
  dirn = os.path.dirname(in_file_name)
  newdir = 'myformat'
  try:
    os.mkdir(os.path.join(dirn, newdir))
  except OSError:
    pass
  out_file_name = os.path.join(dirn, newdir, base)

  cmd = [ebookconvert, in_file_name, out_file_name,
    '--preserve-cover-aspect-ratio',
    '--change-justification', 'left',
    '--margin-bottom', '4',
    '--margin-left', '4',
    '--margin-right', '4',
    '--margin-top', '4',
    '--remove-paragraph-spacing']
  print ' '.join(cmd), '\n'
  sproc = subprocess.Popen(cmd)
  sproc.wait()

if __name__ == '__main__':
  for arg in sys.argv[1:]:
    for filen in glob.glob(arg):
      fixfile(filen)
  exit(0)

Hal Canary | Books, Computers & Code | 2011-06-24 15:28:54 UTC
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scrabble.sh

By Hal Canary
#!/bin/sh
#DTPD#
DICT=/usr/share/dict/words
test "$1" || { cat "$0"; exit 1; }
exec grep -i "$@" "$DICT" | less
#
# Useage:
#   scrabble.sh PATTERN
# Example:
#   scrabble.sh '^a[lonrchl]\{4,7\}$'

Hal Canary | Computers & Code | 2011-06-21 06:27:46 UTC
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txt to html with hyperlink conversion

By Hal Canary

I don’t have time to be writing programs.

#!/bin/sed -f
1 i\
<!DOCTYPE HTML PUBLIC \
"-//W3C//DTD HTML 4.01 Transitional//EN" \
"http://www.w3.org/TR/html4/loose.dtd">\
<html><head>\
<meta http-equiv="Content-Type" \
content="text/html; charset=utf-8">\
<title></title></head><body>
s/\&/\&amp;/g;
s/\"/\&quot;/g;
s/</\&lt;/g;
s/>/\&gt;/g;
s/'/\&#0039;/g;
s/\(http:\/\/[^ ]\+\)/<a href="\1">\1<\/a>/g
1 s/^/<pre>/
$ s/$/<\/pre><\/body><\/html>/

Hal Canary | Computers & Code, Uncategorized | 2011-04-23 20:19:44 UTC
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/bin/coin

By Hal Canary
#!/usr/bin/env python
# ~/bin/coin
#DTPD#
if (ord(open('/dev/random').read(1)) % 2):
 print "heads"
else:
 print "tails"

But why throw away seven bits of entropy?

#!/usr/bin/env python
#DTPD#
n=ord(open('/dev/random').read(1))
for i in xrange(8):
 if  (n % 2):
  print "heads",
 else:
  print "tails",
 n >>= 1
print

Hal Canary | Computers & Code | 2011-04-10 22:21:24 UTC
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convert asterisks to html-bold via sed

By Hal Canary
#!/bin/sed -f
#DTPD#
#convert *bold* text to *html bold*
# also converts /italic/ text to html em
s/\*\([^\*]*\)\*/<strong>\1<\/strong>/g;
s/\/\([^\/]*\)\//<em>\1<\/em>/g;

Hal Canary | Computers & Code | 2011-03-07 20:37:44 UTC
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speaking of the Touch…

By Hal Canary

I’ve decided that using it as an ebook reader is incredibly convenient, because of its small size (it fits nicely in my pocket!). The only advantage an e-ink screen still holds for me is super-long battery life.

Hal Canary | Books, Computers & Code | 2011-03-05 21:23:56 UTC
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HTML/CSS for Ipod Touch

By Hal Canary

I added these lines to the CSS for this page

pre { overflow:auto;
      overflow-y:visible; }

and this line to the (X)HTML

<meta name="viewport"
    content="width=device-width" />

which seems to make the site render much much better on my Ipod Touch’s small screen.

Hal Canary | Computers & Code | 2011-03-05 21:20:35 UTC
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Occam the Dell

By Hal Canary

I really think a computer should last more than 32 months. Sloop, the computer I built in June 2008, failed yesterday. Coincidentally, I ripped the old HDDs out of Dalek the day before to send it to be recycled. Now I have two old boxes to recycle.

I bought a cheap desktop at the store yesterday and didn't even try to look for a good deal online. I just wanted to have a functioning computer. The new case is 34% smaller by volume (I just measured). I would have gotten something even smaller, but I wanted a t least one PCI slot, one PCI Express slot, and room to mount my old HDD. I named it Occam.

Occam is a Dell. The CPU is a Intel Pentium Dual-Core E5800. One benchmark rates this as 34% faster than Sloop's Athlon 64 X2 6000+, which was an upgrade 18 months ago.

Hal Canary | Computers & Code, Life | 2011-02-14 22:43:08 UTC
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REAL10

By Hal Canary

“Real” is not an acceptible synonym for “80-bit floating-point number.” Real numbers aren't even countable, much less in a bijection to a set of size 2^80.

Hal Canary | Computer Science, Computers & Code, Mathematics | 2010-12-09 00:20:44 UTC
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using emacsclient

By Hal Canary

Attention Emacs users. It took me a while to realize that new-style fonts can be enabled by adding this to the ~/.emacs file.

(set-face-attribute 'default
  nil :font "Monospace-11")

So here's how I set up the look of Emacs in my .emacs:

(require 'color-theme)
(color-theme-dark-laptop)
(set-scroll-bar-mode 'right)
(tool-bar-mode nil)
(menu-bar-mode nil)
(set-face-attribute 'default
  nil :font "Monospace-11")

And here's my emacs startup script:

#!/bin/sh
#DTPD#
# ${HOME}/bin/e
if test "$DISPLAY" ; then
  nohup /usr/bin/emacsclient \
    -a '' -n  "$@" \
    > /dev/null 2>&1 &
else
  exec /usr/bin/emacs "$@"
fi

This startes emacs in daemon mode if it's not already running (there's not a lot of harm in leaving a daemon going in the background all the time) and then the client tell the daemon to spawn a new window to open the files mentioned in the command-line arguments. The "nohup" part deparents the server so you don't get error messages hitting your console.

Hal Canary | Computers & Code | 2010-11-07 13:36:36 UTC
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Flashblock Alt Image

By Hal Canary

I noticed that someone had the bright idea to layer Adobe Flash objects *over* images using a <div style="background-image:url($IMAGE_URL)">. That way, when the Flashblock add-on blocks a Flash object, you can give users an idea of what you are blocking. Here’s an example of the technique in use, but it won’t make any sense if you aren’t using Flashblock.

Hal Canary | Computers & Code | 2010-09-26 19:30:06 UTC
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