kmkeen.com: comment feed

Rtl_fm Guide

Sun, 05 May 2013 15:14:58 GMT

It also works nicely on a Mac under OS X assuming you have all the libraries it needs.

Jshon

Fri, 08 Mar 2013 14:16:26 GMT

Linux Wifi

Sat, 09 Feb 2013 10:42:19 GMT

better

Rtl_fm Guide

Wed, 30 Jan 2013 12:43:07 GMT

... And to get a list of legal gain values with `rtl_test`.

Rtl_fm Guide

Wed, 30 Jan 2013 12:39:19 GMT

Add a note that if it sounds bad, the antenna is bad and the gain (`-g`) should be set manually.

AWK Music

Fri, 25 Jan 2013 05:41:50 GMT

Kernighan didn't write C

Code for Puzzlers

Mon, 07 Jan 2013 20:44:32 GMT

This sort of trigram word puzzle is called an Anaquote.

CandyBar2

Mon, 03 Sep 2012 21:50:09 GMT

Like what you are doing. Would you consider using loaf pan, lightly oiled, then lined w plastic wrap (also oiled) and then begin the stacking process. Using slightly oiled sided pan helps keep all edges even and with no, hopefully, unfilled spaces. Plus when finished it could be unmolded and/or placed back into pan with little fuss muss. Also - are the almonds toasted first? Might try toasted coconut = will be trying out your candybar2

Multithreaded Bash

Thu, 09 Aug 2012 15:42:48 GMT

Nevermind. With the Great Usr Merge, this turned into a prophetic typo.

Achieving Post-Scarcity

Thu, 19 Jul 2012 15:00:08 GMT

The beginning of the last sentence in this paragraph seems to miss a word between "don't" and "that".

Tiny Code

Tue, 03 Jul 2012 20:18:48 GMT

https://github.com/ReturnInfinity/BareMetal-OS

Linux Wifi

Mon, 18 Jun 2012 10:11:44 GMT

Forgot to mention, the laws for Tx power vary quite a bit between countries. In the UK you are limited to a flux density, so there is no real limit to gain as long as the tx power is attenuated far enough.

Multithreaded Bash

Thu, 14 Jun 2012 11:56:30 GMT

It only leaks if you don't clear it out.

Multithreaded Bash

Thu, 07 Jun 2012 07:18:36 GMT

Whoops, `#!/bin/bash`

FP

Sun, 03 Jun 2012 15:36:34 GMT

This is not lazy eval.

SocketServer

Wed, 04 Apr 2012 11:49:05 GMT

An how do you deploy that under Apache using flup?

Tree Walking

Thu, 08 Mar 2012 18:47:55 GMT

Technically this uses an adjacency list, not a true tree or graph.

Funcparserlib

Thu, 02 Feb 2012 14:52:31 GMT

Cut `forward_decls` and `with_forward`. Recursive parsers are beyond this intro.

Funcparserlib

Thu, 02 Feb 2012 14:51:14 GMT

An important detail, it short circuits to the first match and does not check further.

Generators for Engineers

Sat, 17 Dec 2011 12:08:18 GMT

You probably want +, not -. And in that case, it should be 4.5, not -4.5.

Generators for Engineers

Sat, 17 Dec 2011 04:05:36 GMT

s/slice(range(20), 4, 16, 2)/range(20)[slice(4, 16, 2)]/g ;)

Generators for Engineers

Sat, 17 Dec 2011 03:56:08 GMT

You gotta a typo in the last line, 1st element should be -0.5 btw nice article!

Generators for Engineers

Fri, 16 Dec 2011 21:26:33 GMT

Maybe I'm missing something obvious here, but why is range producing a parabola?

df2ttf

Fri, 18 Nov 2011 16:12:54 GMT

Sorry, I'm a noob. :( I have several 'flavors' of Python installed for GIMP, Blender, and 'just-in-case'. Subversion is also installed with its own version of Python, which this appears to be defaulting to. Anyway, just in this case, I can drop to a command prompt, type "df2ttf.py" and it attempts to run... then barfs out the following: C:\Users\asmith\Documents\Dwarf Fortress Projects\Software\df2tty>df2ttf.py 'import site' failed; use -v for traceback Traceback (most recent call last): File "C:\Users\asmith\Documents\Dwarf Fortress Projects\Software\df2tty\df2ttf .py", line 6, in import tempfile, os, subprocess, shutil, optparse File "C:\csvn\Python25\\lib\tempfile.py", line 32, in import os as _os File "C:\csvn\Python25\\lib\os.py", line 398, in import UserDict File "C:\csvn\Python25\\lib\UserDict.py", line 84, in _abcoll.MutableMapping.register(IterableUserDict) File "C:\csvn\Python25\\lib\abc.py", line 109, in register if issubclass(subclass, cls): File "C:\csvn\Python25\\lib\abc.py", line 151, in __subclasscheck__ if subclass in cls._abc_cache: File "C:\csvn\Python25\\lib\_weakrefset.py", line 69, in __contains__ return ref(item) in self.data TypeError: cannot create weak reference to 'classobj' object Do I need to force a particular Python version? I have 2.6, 2.7, 3.2 in both 32 and 64 bit flavors.

Tree Walking

Thu, 17 Nov 2011 08:21:40 GMT

your code works but you are confusing the two algorithm. to_crawl.extend gives you breadth first search and extendleft is depth first search. for background on this and other topics on tree search and general AI you can follow this and other related videos http://www.youtube.com/watch?v=slLRsFFiiRc&feature=youtube_gdata_player regards

AWK Music

Thu, 10 Nov 2011 17:40:42 GMT

I found interesting equations to create digital sound and your algorithm to generate pentatonic scale notes and make them sound beautiful should be used to improve those new kind of equations. I will try to mix them: http://js.postbit.com/digital-computer-music-with-bitwise-operators.html

Code for Puzzlers

Sun, 06 Nov 2011 17:17:46 GMT

It was Queen Victoria.

AWK Music

Tue, 25 Oct 2011 12:10:41 GMT

If you're using PulseAudio, you can replace the "> /dev/dsp" with "| pacat" It works a little better if you have a pulseaudio server running. In deb-based distros, pacat is part of the pulseaudio-utils package.

Self Hell

Mon, 17 Oct 2011 04:26:17 GMT

Don't ever suggest that to an experienced python programmer. If they see code that changes `self` they may have a violent response.

Paper Tape

Sun, 16 Oct 2011 11:36:26 GMT

http://www.electronixandmore.com/project/relaycomputertwo/ looks nicer.

Self Hell

Sat, 15 Oct 2011 04:47:59 GMT

If it's private code then `my' instead of `self' is 50% shorter and my.size seems to run off the tongue easier than self.size as you say it.

Multithreaded Bash

Sat, 15 Oct 2011 03:58:15 GMT

The 86KiB leak only occurs if cruft isn't cleared out, or still occurs even if it is?

df2ttf

Wed, 14 Sep 2011 14:55:40 GMT

Hello, I used this code as a basis for a tool to convert pcf bitmap fonts into ttf fonts. I added an improved vectorizer to that the fonts are much more efficient, and split up the code so that you just pass in a dict of bitmaps keyed by the character unicode values. The code is on my github: https://github.com/ali1234/bitmap2ttf Thanks for making this possible :)

Tiny Code

Thu, 31 Mar 2011 05:12:35 GMT

Not a language, but neat: http://www.retroprogramming.com/2011/03/itsy-os-simple-preemptive-switcher.html

Gallery

Wed, 23 Mar 2011 11:32:20 GMT

If you aren't kidding about your caption: "Never did find out what the place was." It is the "Basillique Marie Reine - du Monde " roughly: Basilica of Mary Queen of the World Was there with my Family this Summer (Didn't go in this one, but did go to Notre Dame Cathedral - amazing) Googgle streetview: http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=st+elizabeth+montreal+canada&aq=&sll=43.325178,-103.535156&sspn=93.680607,142.207031&ie=UTF8&hq=st+elizabeth&hnear=Montreal,+Communaut%C3%A9-Urbaine-de-Montr%C3%A9al,+Quebec,+Canada&ll=45.498916,-73.56882&spn=0.001395,0.00217&z=19&layer=c&cbll=45.498977,-73.568943&panoid=YyBDEWKyfU8n0xXDys9oCA&cbp=12,46.22,,0,-8.4 (PS say hi to twitter/audreyhuntley for me -a long lost old friend of mine)

df2ttf

Tue, 15 Mar 2011 08:12:05 GMT

Fixed. Thanks!

df2ttf

Mon, 14 Mar 2011 02:21:01 GMT

Hey, I found a bug in your table: you have 9762 for the female sign, it should be 9792.

Code for Puzzlers

Wed, 16 Feb 2011 03:39:48 GMT

Good intro to using permutations in itertools. Have come across your awk music on reddit. Cool stuff. Please do come up with more articles/tutorials. A mention of India in one of your articles(LCD Hacks). Have been there? Am an Arch Linux user too.

Tiny Code

Sat, 12 Feb 2011 20:23:09 GMT

LUnix, for the C64 http://hld.c64.org/poldi/lunix/lunix.html

Tiny Code

Fri, 03 Sep 2010 08:33:52 GMT

I swear I am going to merge all these notes into the page soon. Until then, one more: http://code.google.com/p/picoc/

Tiny Code

Mon, 16 Aug 2010 03:09:26 GMT

And just to be complete, the two "purest" distros: http://www.informatimago.com/linux/emacs-on-user-mode-linux.html http://perllinux.sourceforge.net/

Mainloops

Wed, 11 Aug 2010 11:11:35 GMT

In real life you would probably use glib.io_add_watch (or at the very least, glib.timeout_add) and gtk.run(). Calls to time.sleep in event loops is usually a sign of brokenness.

Mainloops

Wed, 11 Aug 2010 11:08:15 GMT

You can drive Tkinter one redraw at a time, actually. Twisted's Tk support does this, in fact: just call update on your top-level Tkinter.Tk instance once in a while.

Tiny Code

Wed, 11 Aug 2010 09:38:15 GMT

Jim is an 85KB TCL interpriter. http://jim.berlios.de/

Tiny Code

Wed, 11 Aug 2010 09:30:51 GMT

F is very similar to Joy, but even lighter. http://www.nsl.com/k/f/f.htm Needs K as a backend?

Mainloops

Tue, 10 Aug 2010 12:01:22 GMT

If you don't want to roll your own, Twisted has custom reactors for several GUI libraries that handle this problem for you.

Mainloops

Tue, 10 Aug 2010 03:19:32 GMT

Networking loops, true. GUI mainloops, true. But usually I add a GUI to a computationally expensive process to provide a real time window into what the computation is thinking. Adding a multithreaded GUI to relatively simple apps, like an [orbital simulator](http://www.ittc.ku.edu/icfp-contest/), would run half has fast going from single core to single core with hyperthreading, and would not run at all on multicore systems. IIO bound threads + CPU bound threads are not a good idea in Python. You've reminded me of something. IMerging mainloops also cleans up the code. Since you can't cleanly kill threads, you need extra flags and exception handling. It is much easier to exit a single threaded app. Will add this.

Mainloops

Mon, 09 Aug 2010 23:43:34 GMT

I'm not sure this is accurate. Mainloops are a form of blocking IO. For such situations (where the loops are mostly waiting for input), using threads is fine even on a multicore system.

Subclasses

Fri, 18 Jun 2010 18:20:43 GMT

subclasses from **the** public mock up

Subclasses

Fri, 18 Jun 2010 13:51:06 GMT

This appears to be the same functionality that Java interfaces provide. The one thing I'd change is replace "pass" with raise Exception("Must implement.") so you'd get something like: def send(self, message): "Send a single message." raise Exception("Must implement.") That way if you forget to implement it in a child class, you'll know immediately because your code will freak out.

Flash Recovery

Thu, 10 Jun 2010 16:30:38 GMT

Another way to recover files from lost+found: http://karuppuswamy.com/wordpress/2010/06/09/how-to-recover-files-from-lostfound-after-fsck-in-linux-how-i-did-it-in-ubuntu/

LCD hacks

Wed, 02 Jun 2010 03:31:48 GMT

Time marches on. http://www.reocities.com/smozoma/projects/keyboard/index.htm#The_QWERF_Layout

Gallery

Tue, 25 May 2010 17:03:13 GMT

"best battery **life**"

Generators for Engineers

Tue, 27 Apr 2010 08:19:19 GMT

s/computer/compute in "Here's how to computer [...]". Thanks for the tips, especially itertools.tee.

Tiny Code

Sun, 25 Apr 2010 06:14:16 GMT

Another Lisp floppy OS: http://losak.sourceforge.net/

Tiny Code

Wed, 17 Mar 2010 10:56:19 GMT

I think this is about as awesome as BashForth: http://www-2.cs.cmu.edu/afs/cs/project/ai-repository/ai/lang/lisp/impl/awk/0.html

Thixotropical

Fri, 12 Mar 2010 02:40:00 GMT

Nice usage of funcparserlib! Your composition sounds interesting :) Is it right that you use a finite non-deterministic automaton for generating it? To be more precise, a Markov chain?

Tiny Code

Sat, 27 Feb 2010 18:14:01 GMT

Quest for the smallest Java VM, http://www.harbaum.org/till/nanovm/ is the leading contender.

Thixotropical

Sat, 27 Feb 2010 07:43:03 GMT

For the curious, "ts.txt" contains a very crude and out of key rendition of Philip Glass's "100,000 People". Listening to the mess after the fact is much less enjoyable than live coding new parts in.

Tiny Code

Sat, 30 Jan 2010 05:38:51 GMT

Bare Metal OS: http://www.returninfinity.com/baremetal.html But I don't have any 64 bit chips to try it out on.

Tiny Code

Tue, 22 Dec 2009 11:58:13 GMT

Superior to tinypy? http://code.google.com/p/python-on-a-chip/

Tiny Code

Fri, 27 Nov 2009 10:44:45 GMT

Looks like picolisp has a new website, picolisp.org

Tiny Code

Sun, 27 Sep 2009 12:10:55 GMT

Here is a clever idea. Hack tomsrtbt and replace the normal login init with a interpreted language. http://www.complang.tuwien.ac.at/forth/gforth/almost-native/

Tiny Code

Sun, 27 Sep 2009 09:46:27 GMT

Linux backported to 8086: http://elks.sourceforge.net/

Tiny Code

Sat, 26 Sep 2009 17:55:38 GMT

And another: http://pcc.ludd.ltu.se/

Tiny Code

Sat, 26 Sep 2009 13:23:41 GMT

Investigate http://nwcc.sourceforge.net/index.html

Tiny Code

Tue, 22 Sep 2009 20:36:39 GMT

It has been surprising hard finding a single floppy linux which provides more than BusyBox shell scripting. Surprisingly, Tomsrtbt has Lua!

Tiny Code

Tue, 22 Sep 2009 12:29:35 GMT

[sx forth](http://www.avrfreaks.net/index.php?module=Freaks%20Tools&func=viewItem&item_id=716) is for AVRs and only needs 8kb flash

CandyBar2

Fri, 22 May 2009 20:12:45 GMT

w00t! I wish I had been there, it looks tasty!

ProjBot

Sun, 19 Apr 2009 15:37:36 GMT

Fixed.

ProjBot

Sun, 19 Apr 2009 14:10:55 GMT

Image mode is half broken right now, as Google has slightly changed things. Sometimes they return JS code that is expanded into HTML, other times they return straight HTML.

SocketServer

Fri, 17 Apr 2009 15:56:33 GMT

> it is send back. Sent back.

CandyBar2

Thu, 19 Feb 2009 18:39:37 GMT

So after letting some of the candy bar sit out for a few days, the marshmallow became much more firm. Will have to try purposefully dehydrating the fluff before laying it.

CandyBar2

Wed, 18 Feb 2009 09:37:59 GMT

I really disliked the nutella layer. It was too similar to the other chocolate layers, so it somehow felt... wrong. Like the chocolate had melted and become cakey and disgusting.

CandyBar2

Wed, 18 Feb 2009 09:37:01 GMT

I noticed as I was eating the candy bar that the bottom chocolate layer was the most delicious and texturally interesting. And now we know why - MORE SUGAR.

CandyBar2

Wed, 18 Feb 2009 09:33:13 GMT

Also, tempering chocolate prevents "chocolate bloom" the white stuff that shows up when chocolate bars get left in a hot car and then cooled again. The "bloom" is actually free cocoa butter that diffuses to the surface. I think chocolate also becomes rancid faster when it is untempered because of this "blooming" process. That's why I always eat chocolate right away when it melts in the car.