Monday, May 30, 2011
Friday, May 27, 2011
Skype for Asterisk disconnecting - The H Open Source: News and Features
Skype for Asterisk disconnecting - The H Open Source: News and Features
The good news: at Skype they emphasise on their SIP compatibility.
The good news: at Skype they emphasise on their SIP compatibility.
Thursday, May 26, 2011
Wednesday, May 25, 2011
O'Reilly Media book: Sinatra: Up and Running
Sinatra: Up and Running: 
Take advantage of Sinatra, the Ruby-based web application library and domain-specific language used by GitHub, LinkedIn, Engine Yard, and other prominent organizations. With this concise book, you will quickly gain working knowledge of Sinatra and its minimalist approach to building both standalone and modular web applications.
Take advantage of Sinatra, the Ruby-based web application library and domain-specific language used by GitHub, LinkedIn, Engine Yard, and other prominent organizations. With this concise book, you will quickly gain working knowledge of Sinatra and its minimalist approach to building both standalone and modular web applications.
Tuesday, May 24, 2011
Saturday, May 21, 2011
/tmp/docview500 ???
I found that directory on my openSUSE Linux computer, with really a lot of files, whose names were derived from files in my home directory. The time stamps were quite recent. I have no idea, which software created that directory (tree). It would be a relief to know it was KDE, but actually why should it?
Friday, May 20, 2011
extracting infos from a rather detailed PDF (from a software developer's point of view)
If I access PDF, I rather read the XML created by "pdfthtml -xml" for a PDF file. Although there are features, that I miss with XML::Simple, I find that module rather convenient.
Think of a pay slip as PDF. It has quite a regular structure. (Of course, you might also want to receive an XML representation of it directly from the salary software, but that's another issue. In this very case this looked like rather hard to achieve.)
There are labels and there are values. I want to access values by their labels. Therefore I need a specification describing, where the value belonging to a specific label is located relatively. I do this by giving a relative rectangular range / region. All text strings provided by "pdftohmtl -xml" (i.e. the text elements) get stored into a matrix (X×Y). So far there were no big obstacles accessing the value for a label by scanning the matrix within that relative rectangular region.
I actually and also usually don't want and need to specify, where the label is located on the page. Why would you want to specify that, as long as it's not necessary?
But certain labels appear more than once. I add the absolute rectangular region of the label, in case that is needed. Of course, this spec. is as terse as possible. A PDF page has its origin at the upper left corner (you do know that). So if the label is just above y=500, you neither need to give the left upper corner of the resp. rectangular region nor the lower right corner. This makes the label/value spec. just as verbose as needed.
(Right, I know a picture would help: A picture is worth a thousand words.)
My software is implemented in Perl, and so far the label/value specs are done programmatically. Of course, I would like to have a spec as XML or as a DSL, but I am not there yet.
To be continued …
Think of a pay slip as PDF. It has quite a regular structure. (Of course, you might also want to receive an XML representation of it directly from the salary software, but that's another issue. In this very case this looked like rather hard to achieve.)
There are labels and there are values. I want to access values by their labels. Therefore I need a specification describing, where the value belonging to a specific label is located relatively. I do this by giving a relative rectangular range / region. All text strings provided by "pdftohmtl -xml" (i.e. the text elements) get stored into a matrix (X×Y). So far there were no big obstacles accessing the value for a label by scanning the matrix within that relative rectangular region.
I actually and also usually don't want and need to specify, where the label is located on the page. Why would you want to specify that, as long as it's not necessary?
But certain labels appear more than once. I add the absolute rectangular region of the label, in case that is needed. Of course, this spec. is as terse as possible. A PDF page has its origin at the upper left corner (you do know that). So if the label is just above y=500, you neither need to give the left upper corner of the resp. rectangular region nor the lower right corner. This makes the label/value spec. just as verbose as needed.
(Right, I know a picture would help: A picture is worth a thousand words.)
My software is implemented in Perl, and so far the label/value specs are done programmatically. Of course, I would like to have a spec as XML or as a DSL, but I am not there yet.
To be continued …
Blogger Buzz: Add a virtual tip jar to your blog
Blogger Buzz: Add a virtual tip jar to your blog
Google Checkout as competition to Flattr.
I have not made reasonable amounts of money through Flattr yet; I have no idea, how it works for real writers; question is, whether Google Checkout will make it easier to earn money through sharing "text" on the web.
Here is the Google Checkout Blog.
The article mentioned above is in fact a promotion link between Google's Blogger department and Google's Checkout department.
Google Checkout as competition to Flattr.
I have not made reasonable amounts of money through Flattr yet; I have no idea, how it works for real writers; question is, whether Google Checkout will make it easier to earn money through sharing "text" on the web.
Here is the Google Checkout Blog.
The article mentioned above is in fact a promotion link between Google's Blogger department and Google's Checkout department.
Wednesday, May 18, 2011
Tuesday, May 17, 2011
how does Skype show you to yourself?
Skype on Mac OS X shows you, as if you look into a mirror – I find that rather "natural" and "usual", just what I prefer.
Skype on Windows seems to show you "the other way round" – like other people see you.
If you are having a video conversation via Skype, you will occasionally look whether your face is still rather centered within the shown window. If you move or turn left and right and if that's not shown like in a mirror, I find that weird.
Skype on Windows seems to show you "the other way round" – like other people see you.
If you are having a video conversation via Skype, you will occasionally look whether your face is still rather centered within the shown window. If you move or turn left and right and if that's not shown like in a mirror, I find that weird.
Monday, May 16, 2011
O'Reilly Media book: Perl Cookbook
Perl Cookbook, Second Edition - O'Reilly Media
Chapter 22 XML
Chapter 22 XML
- 22.9: Reading and Writing RSS Files -> meta feeds
useful scripts in their example code at http://examples.oreilly.com/9781565922433/:
- oreilly--Perl_Cookbook--code/ch09/symirror – build spectral forest of symlinks
- …
"meta feeds" bookmark collection
- Ruby Cookbook: 11.16 A Simple Feed Aggregator
- Wicked Cool Ruby Scripts: #13 RSS Parsing
- Spidering Hacks: Hack #69 – Aggregating RSS and Posting Changes (in Perl)
- Perl and XML: Chapter 9 RSS, SOAP, and Other XML Applications
- Perl Cookbook: Chapter 22 XML: Reading and Writing RSS Files
- "Webbots, Spiders, and Screen Scrapers (2nd ed.)" (in PHP) by Michael Schrenk, Chapter 12
- …
book: Webbots, Spiders, and Screen Scrapers, by Michael Schrenk
Official Web Site: Webbots, Spiders, and Screen Scrapers, by Michael Schrenk
Chapter 12 features aggregation "webbots".
book: Wicked Cool Ruby Scripts | No Starch Press
Wicked Cool Ruby Scripts | No Starch Press
- Chapter 1: General Purpose Utilities
- Chapter 2: Website Scripting :
#13 RSS Parsing -> meta feeds - Chapter 3: Li(U)nix System Administration
- Chapter 4: Picture Utilities
- Chapter 5: Games and Learning Tools
- Chapter 6: String Utilities
- Chapter 7: Servers and Scrapers
- Chapter 8: Arguments and Documentation: very nice examples on command line processing and inline documentation à la RDoc suitable for nice usage messages
- Chapter 9: Sorting Algorithms
- Chapter 10: Writing a Metasploit 3.1 Module with Ruby
RSS-2-HTML, Atom-2-HTML
I need to display a few syndication feeds as HTML, and I am seeking software in Ruby or Perl (i.e. neither PHP, nor anything heavy at all): "rss2html", "atom2html".
- something in Perl for RSS (source code)
- …
$ cpanm XML::RSS
…
Friday, May 13, 2011
Rosetta (software) - Wikipedia, the free encyclopedia
Rosetta (software) - Wikipedia, the free encyclopedia :
Rosetta is a lightweight dynamic translator for Mac OS X distributed by Apple. It enables applications compiled for the PowerPC family of processors to run on Apple systems that use Intel processors. Rosetta is based on Transitive Corporation's QuickTransit technology,[1] and is a key part of Apple's strategy for the transition of their Macintosh line from PowerPC to Intel processors as it enables pre-existing Mac OS X software to run on the new platform without modification. …So in like 2005/2006 they thought, Intel Macs would not be sufficiently fast to execute software with "high computational needs" through Rosetta, but >2010 Intel Macs are powerful enough to do even that. Somebody told, his old PPC Mac Photoshop runs nicely on his 2010 Snow Leopard MacBook Pro, and he was very delighted about that.
Rosetta is part of the Mac OS X for Intel operating system. It translates G3, G4, and AltiVec instructions; however, it does not translate G5 instructions. Therefore, applications that rely on G5-specific instruction sets must be modified by their developers to work on Intel-based Macs. According to Apple, applications with heavy user interaction but low computational needs (such as word processors) are well suited to translation via Rosetta, while applications with high computational needs (such as raytracers or Adobe Photoshop) are not. …
Thursday, May 12, 2011
the "Long Tail" of a probability distribution (statistics)
Long Tail - Wikipedia, the free encyclopedia
 |
| An example of a power law graph showing popularity ranking. To the right is the long tail; to the left are the few that dominate. Notice that the areas of both regions match. |
Tuesday, May 10, 2011
Friday, May 6, 2011
Thursday, May 5, 2011
Tuesday, May 3, 2011
n-up several images
I need to compare like 100 pairs of images. I started by looking at them immediately one after the other. I don't feel comfortable with that. I want to see both of them together. I will create auxiliary images using ImageMagick and making use of this recipe:
Now I am going to create the auxiliary images in a shell script…
Q: another task might be this: how do I also reduce the size of every single image, so that they all fit on one "page"?
That's not really relevant, as the usual image viewers are able to display image in just the right size on your screen.
convert -append input1.jpg input2.jpg input3.jpg -border 5 output.jpgIf I try doing this using GraphicsMagic, I don't see the border.
Now I am going to create the auxiliary images in a shell script…
Q: another task might be this: how do I also reduce the size of every single image, so that they all fit on one "page"?
That's not really relevant, as the usual image viewers are able to display image in just the right size on your screen.
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