All the python scripts listed here are using the library pytagger.

<?php
if ($handle = opendir('.'))
{
   while (false !== ($file = readdir($handle)))
   {
	   if ($file != "." && $file != "..")
	   {
		$file_name = $file;
		$file = explode("-", $file);

		if(count($file) < 2)
		  continue;

		$interpret = trim($file[0]);
		$title = trim(str_replace(".mp3","",$file[1]));

		echo "interpret: $interpret , tite: $title \n";
		// execute the python script id3.py to set the tags
		exec("./id3.py '$file_name' '$title' '$interpret' ");
	   }
	}
}

closedir($handle);
?>

Unfortunately I forgot to strip the digits so all the interpreters had two leading digits afterwards.

I had to iterate over the files again. As id3.py creates new tag frames I had to write another script (fix_interpreters.py) that reads the old frames to get the old values.

#!/usr/bin/env python

from tagger import *
import sys, os, fnmatch, pickle, re

filename = sys.argv[1]

print "Processing '", filename, "'"

try:
  id3 = ID3v2(filename)

  if id3.tag_exists():
    interpret_frame = None
    for frame in id3.frames:
      interpretfid = 'TPE1'
      if id3.version == 2.2:
        interpretfid = 'TP1'

      if frame.fid == interpretfid:
        interpret_frame = frame
        break

    interpret = interpret_frame.strings[0]
    repaired = re.sub('^\d\d\s', '', interpret)

    print "Repairing "", interpret, "" => "",repaired,"""
    interpret_frame.set_text(repaired)

    # replace interpret frame
    id3.frames = [frame for frame in id3.frames if frame.fid != interpretfid]
    id3.frames.append(interpret_frame)
    id3.commit(pretend=0)

except ID3Exception, e:
  print("ID3 exception: %s" % str(e))

I didn’t want to rewrite the php script above because I thought that typing a loop in the shell would be easier (or at least faster).

for file in `ls -1 *.mp3`; do ./fix_interpreters.py $file; done

I tried it with this loop but ls -1 *.mp3 doesn’t list each mp3 file one per line as expected. Instead it splits the filenames after each whitespace. Thankfully to Greg Miller’s post about Handling Filenames With Spaces this wasn’t no problem anymore. I changed the loop into

find ./ -name '* *' | while read filename; do ls -ld "$filename"; ./fix_interpreters.py "$filename"; done

and ta-da, it worked.

The example shows how to get the first array element on three different ways.

<ul>
  <li></li>
  <li></li>
  <li></li>
</ul>

<script type="text/javascript">
    $(document).ready(function(){
        var elems, elem;
        elems = $("li"); // get an array of all the list items

        // This is a jQuery object that you can call jQuery related methods on.
        elem = elems.eq(0); 

        // This is the DOM element itself that lets you access the native
        // javascript attributes and methods.
        elem = elems.get(0); 

        // This is the DOM element too.
        elem = elems[0];
    });
</script>

Instead of using the filter method eq() you can combine the filter with the selector like this

var elem = $("li:eq(0)");

or

var elem = $("li:first");

To turn a DOM element into a jQuery object you can wrap it with jQuery(element) or $(element) if you’re not in conflict mode. But keep in mind that this creates a new object which wastes consumes memory so pay attention if you do this in a loop.

www.youtube.com/watch?v=A-Rp6wMZ1-s

    <key>UTExportedTypeDeclarations</key>
	<array>
	<dict>
	  <key>UTTypeConformsTo</key>
	  <array>
		<string>public.text</string>
        <string>public.plain-text</string>
	  </array>
	  <key>UTTypeDescription</key>
	  <string>Plain text file</string>
	  <key>UTTypeIdentifier</key>
	  <string>com.barebones.textwrangler</string>
	  <key>UTTypeTagSpecification</key>
	  <dict>
		<key>com.apple.ostype</key>
		<string>TEXT</string>
		<key>public.filename-extension</key>
		<array>
		  <string>conf</string>
          <string>ini</string>
          <string>bak</string>
          <string>types</string>
		</array>
	  </dict>
	</dict>
	</array>

• roots: Find polynomial roots
• poly: Convert roots to polynomial
• conv: Convolution and polynomial multiplication
• polyval: Evaluate polynomial
• tf: Creation of transfer functions or conversion to transfer function
• pzmap: Pole-zero map of LTI models
• pole: Compute the poles of LTI models
• zero: Computes the transmission zeros of LTI models
• series: Series interconnection of the two LTI models
• parallel: Parallel interconnection of two LTI models
• feedback: Feedback connection of two LTI models
• minreal: Minimal realization and pole-zero cancellation
• step: Step response of LTI models

public class Dummy1
{
	private class Dummy2
	{
		public Dummy2()
		{
			method();
		}
	}

	private void method() { }
}

So far so good but if the inner class has the same method this will be called instead. To avoid this ambiguity one can call the method in a more specific way. To be able to call the method of the outer class the prefix Dummy1.this can be added.

public class Dummy1
{
	private class Dummy2
	{
		public Dummy2()
		{
			Dummy1.this.method();
		}

		private void method() { }
	}

	private void method() { }
}

Once again I have some trouble with my backup drive today. The problem is that at any time the connection to my external hard drive gets interrupted. This is very bad if Time Machine, the backup software, is writing to the disk at the same time and there’s absolutely no rule when this appears. One more bad thing is that the system recognizes the lost connection but it hangs up until the cable is unplugged. It looks like the hard drive is going into a sleep mode but you can still hear the disk rotating. There’s a WD Caviar Green inside and after my research I’m sure that the case is the evildoer. This is a MacPower Pleiades 3.5″ FW400/USB I bought in last August.

These and those have the same problem with their Pleiades case and here’s a video of a guy getting nervous like me:

www.youtube.com/watch?v=xGsaGzHlcjQ

Based on the tikz flowchart example I created my first flowchart in Latex. Creating such a flowchart with Latex is not as easy as it looks like. Sometimes you don’t get an error message even if there is an error (especially missing semicolons) in the code. In my case pdftex just hang up. One thing was a bit tricky but first have a look at my code:

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{shapes,arrows}

\begin{document}

\pagestyle{empty}

% Define block styles
\tikzstyle{decision} = [diamond, draw, fill=blue!20,
text width=4.5em, text badly centered, node distance=3cm, inner sep=0pt]

\tikzstyle{block} = [rectangle, draw, fill=blue!20,
text width=4cm, text centered, rounded corners, minimum height=4em, minimum width=4.5cm]

\tikzstyle{line} = [draw, -latex']

\tikzstyle{cloud} = [draw, ellipse,fill=red!20, node distance=3cm,
minimum height=2em]

\begin{tikzpicture}[node distance = 3cm, auto]
% The nodes
\node[cloud] (business) {Business};
\node[block, below of=business] (person) {i:=person};
\node[decision, below of=person] (sex) { i.sex = male ?};
\node[decision, below of=sex, node distance=4cm] (sex2) { i.sex = pre-op transsexuel female ?};    

\node[block, right of=sex2, node distance=6cm] (execution_block_1) {i.enter(toilet)\\
i.open(trousers)\\
i.target(eyes, center)\\
i.target(hands, center)
};

\node[block, below of=execution_block_1] (open_bladder) { i.open(bladder) };
\node [decision, below of=open_bladder, text width=2cm] (bladder_empty) {i.bladder = empty?};

\node[block, below of=bladder_empty] (execution_block_2) { i.close(bladder)\\
 i.close(trousers)\\
 i.flush(urinal)
 };

\node [block, below of=execution_block_2] (exit) { i.exit() };

% The connections
\path [line] (business) -- (person);
\path [line] (person) -- (sex);
\path [line] (execution_block_1) -- (open_bladder);
\path [line] (execution_block_2) -- (exit);

\path [line] (sex) -- node [near start] {no} (sex2);
\path [line] (sex) -| node [near start] {yes} (execution_block_1);
\path [line] (sex2) -- node [near start] {no} (execution_block_1);
\path [line] (sex2) |- node [near start] {yes} (exit);
\path [line] (open_bladder) -- (bladder_empty);
\path [line] (bladder_empty) -- node [near start] {yes} (execution_block_2);
\path [line] (bladder_empty) -- +(4,0) -- +(4,3) -- node [near start] {no} (open_bladder);
\end{tikzpicture}

\end{document}

The decision block with the bladder emptiness check has more than one curve. -| or |- didn’t work so the trick here is that you have to add coordinates (x,y) to the connection line where it should curve.

While I was experiencing the error message after the first time I hit the menu yesterday, I’m absolutely not able today to get the command run once. In fact the behaviour shouldn’t change over night but anyway keep an eye on isHandled.

My plugin output this today¹:

11:21:23 zprototype.AbstractApplication::start   Starting the plugin
11:42:47 zprototype.command.LoadModel::addHandlerListener
11:42:47 zprototype.command.LoadModel::isEnabled
11:42:48 zprototype.command.LoadModel::isHandled
11:42:48 zprototype.command.LoadModel::isEnabled
11:42:48 zprototype.command.LoadModel::isEnabled
11:42:48 zprototype.command.LoadModel::execute
11:42:49 zprototype.command.LoadModel::isEnabled

AbstractApplication is actually the entry point of the plugin and LoadModel is the menu handler.

As you can see isHandled is executed before execute so if it returns false a NotHandledException will be thrown.

I was trying to load a json object while using Firebug and jQuerify to inject jQuery code into the website of the currently active tab. If you don’t know what I’m talking about, these are firefox add-ons. Firebug is a great debugging tool whereas jQuerify adds the jQuery library to any website if it’s not yet loaded.

Now some details to my recent problem. If I enter the URL into the browsers location field I get a proper json object back. If I send an XMLHttpRequest to the same URL the server responses with the status code 301 Moved Permanently. Has this issue to do with the Same Origin Policy (SOP) ?

If so I need a workaround because this URL will be the new API URL for some web apps.

Any suggestions what this could be?

Edit:
It wasn’t a SOP problem but I also had to face with such a problem later. The above described behaviour came from a missing / at the end of the URL. Entering such a URL into the location field the browser automatically add the tailing slash if it’s missing. After I found that out I wasn’t able to fetch the json from another domain. It’s been months that I’ve been coding jQuery a lot so I forgot one little but important information. The server has to send an additional header to allow other domains. More about this later in a seperate post.