Pelerin-Voyageur

How to convert videos to be imported in iMovie for free

2011-07-28T10:38:00.000-07:00

Hi,these days I'm preparing a funny video to be shown at the wedding party of one of my best friends. For that, I asked all our friends to send me short clips of greetings or jokes.But then I received clips in whatever format...and iMovie does not accept many formats actually... :-(So I started to google to find free tools to get them converted in Quicktime .mov easily. After many trials I ended

Regular expressions in Eclipse: some working examples

2011-03-14T03:43:00.000-07:00

I found very useful the Regular Expressions support in the "Find and Replace" window of the Eclipse IDE.Here some expressions I used. Mainly a reminder for me, of course; but I think they can be useful for others as well, as working examples.Note that you can refer to groups within the regular expression in the "Search" field, with the symbol $ followed by an increasing number: $1 for the first

Using CherryPy in Google App Engine applications

2010-09-15T05:34:00.000-07:00

There are two articles telling about using CherryPy in GAE applicationshttp://boodebr.org/main/python/cherrypy-under-google-appserverhttp://blog.dispatched.ch/2010/08/13/serving-images-dynamically-with-cherrypy-on-google-appengine/I found them useful, but in none of them it's described how to install CherryPy for this use.The problem with CherryPy in GAE it's that the Google framework does not

no more sound after a mac os x restart? Fixed

2010-08-07T00:48:00.000-07:00

Ufff.... that what happened to me just some minutes ago: after a restart of my MacBook white, due to an overload (the system started to respond very slow, I had too many apps opened and it was many days I didn't shut it down)..... I had no more soud!!!Remembering the old days, when I was used to spend hours in fixing Windows problems with drivers, corrupted updates and so on..... I was already

Using Kerberos on Mac Os X 10.6 Snow Leopard

2010-05-04T06:30:00.000-07:00

Problem:I tried to use Kerberos authentication system out-of-the-box with my new Mac, and when I try to get a ticket I got this error:$> kinit user@HOST.COM$> kinit: Unable to acquire credentials for 'user@HOST.COM': Cannot resolve network address for KDC in realm HOST.COMSolution:So I googled a bit and I tried some recipes, but I just discovered that the order with configuration files are read

How to change or clear your Subversion password used by eclipse plugins on Mac OS X

2010-05-03T12:35:00.000-07:00

I assume that you are using Eclipse Galileo on Mac Os X Snow Leopard, with JavaHL SVN client.It happened to me that once I updated the password of my account on the subversion server machine, Eclipse did not allow me to connect to the repository anymore; moreover it did not ask me for a new password, I merely got errors like "The folder does not exists on remote server" and authentication errors

LaTeX: how to include a minted pygmentized piece of code in a figure environment, with three minipage in a row

2010-05-03T08:16:00.000-07:00

Sometime we want to put two, three or more LaTeX objects side by side on one row. For example we want to put more figures one next to the other. Or we want to build complex figures gathering under one "figure" environment more objects like formatted text, images and highlighted source code using pygmentize and minted. Here below you will find a working example.The same example is valid if we want

Linux: How to use an external hard disk, how to mount it

2009-04-02T07:33:00.000-07:00

Problem: In my case I plugged the external hard disk into the USB port; a new folder with the name of my external HD was created, but it was empty.Solution: I had to mount by hand the external hard disk, even if it was automaticaly recognized and a folder for it (empty) was created.----------The problem was that, when I plugged my external HD to the USB port of my Linux box, the disk was

Python: Exception TypeError "argument of type 'instance' is not iterable" in 'garbage collection' ignored. Fatal Python error: unexpected exception

2009-04-02T05:09:00.000-07:00

Problem: I got a nasty Fatal error message running my Python code: "Exception exceptions.TypeError: "argument of type 'instance' is not iterable" in 'garbage collection' ignored"Solution: I forgot to use vars() function when checking the existance of a variable in an imported module-----------------I got this error in my Python code today, and it took me 20 minutes to understand where the bug

Eclipse IDE: How to install and configure MinGW GNU C++ compiler for Windows

2009-04-01T06:57:00.000-07:00

Eclipse IDE has the very nice CDT environment for C++ programming.In order to use it under Windows, you have to install a C++ compiler.Our suggestion is to install the MinGW compiler, "A MINimalistic Gnu for Windows" Gcc compiler.Go to http://www.mingw.org/ and download the installer for Windows from here.Then start the Installer and choose to install the basic package + the g77 compiler + Make

Eclipse: How to get rid of the squiggly orange line in C++ editor

2009-04-01T02:57:00.001-07:00

Problem: Using the Eclipse IDE with C or C++ code I have an annoying orange squiggly line throughout my codeSolution: Changing the C/C++ Indexer Markers optionsUsing the Eclipse IDE to programming C++ code, when an "include file" statement is not resolved, it is marked with an orange question mark and the whole code in the file we are editing are understriked with an orange squiggly line, as

Subclipse error: Svn can't create tunnel. Configuring SVN+SSH connection on Windows Vista

2008-10-24T22:36:00.000-07:00

Good morning!Yesterday I wanted to install the beautiful Eclipse IDE on my new Windows Vista laptop. Everything went fine. I also installed Subclipse, the interface to the "Subversion" Version Control System, in order to access my code in the repositories on the remote machines of my Insitute.Everything went fine again, but then, when I wanted to set up a SVN+SSH connection to checkout my code

Finalmente risolto il problema di Windows Vista con la connessione di rete wireless

2008-10-12T10:21:00.000-07:00

Erano mesi ormai che nella nuova casa avevo questo problema con Windows Vista: ogni tanto, senza ragione apparente, perdeva la connessione wireless. Magari per dieci ore tutto funzionava...poi all'improvviso...PUM! L'iconcina della rete mostrava una bella "X" rossa e non c'era piu' verso di far rivelare a Windows la rete wireless di casa. Cercando di fare il refresh delle reti disponibili,

How to measure memory consumption of a program on Linux

2008-06-06T07:31:00.000-07:00

The Linux operating system provide detailed information about memory processes use. You can use the ps or the top tools; or you canread information written on the /proc filesystem.There you can find detailed information for every jobs running on your machine. You can get a list of the running jobs with:ps -Aand then look, for example, into the file /proc/5995/status, where 5995 is the Job ID:cat

Linux Fedora Core: How to set the mailing service of YUM Package Manager

2008-05-15T03:21:00.000-07:00

To set the mailing notification system of the YUM Packages Manager on Fedora Core Linux systems (as SLC4) edit the file/etc/sysconfig/yum-autoupdateand uncomment and edit this line:#YUMMAILTO="root"YUM will send a notification email to root every time it update something. Mail messages sent to "root" are stored in the file /var/mail/root. simply open this file with an editor or with more or cat

list of file with full path with 'ls' in a shell

2008-05-07T02:23:00.000-07:00

if you want a list of file with the full path, ready to be pasted in a txt file to be processed by a script, for example, you have to add $PWD to the path in 'ls';e.g.:ls -1 $PWD/*.rootwill show you the list of all the files ending with .root with their full path.

VI editor: Search and Replace text

2008-01-23T06:20:00.000-08:00

IMPORTANT! Before start changing your text file, please remember the commands to UNDO and REDO::u or :undo[n]:red or :redo[n]where "n" is the number of changes. The default value is "n=1".With the command (in ESC mode)::%s/foo/bar/gcthe active file will be searched for the pattern "foo" and replaced with "bar". For every replacement you'll be asked for a confirmation.With:%s/foo/bar/gyou

History Brush on Photoshop CS3: Make a Black&White Image with coloured areas

2008-01-12T13:46:00.000-08:00

Open an image in Photoshop CS3.Edit the image as necessary. Open the Image->Adjustements->Black&White in order to get a nice b&w image.Click on "History" and click on the little square on the left of a status of the image just before the black&white conversion. This status will be taken as "Source" for the "History Brush".Now come back to the image clicking on the last status. Select the "History

Rename files

2008-01-11T03:19:00.000-08:00

Thanks to Stephan [my room-mate :-) ] I discovered the command "rename"!N.B. The following works on Debian:Let's say I want to rename a file callled "test11.txt" to "test12.txt"; the command which does the job is:rename 's/11/12/' test11.txtwhere 's/11/12/' is a perl-style Regular Expression (RE), where 's' stands for "string".If you are not sure about your RE you can test it with the "-n" option

VI editor: comment a whole line or N lines

2008-01-09T10:32:00.001-08:00

If you want to comment N lines of a Bash script (for example) with the VI (or VIM) editor you have to type in ESC- mode (type ESC before typing the command)::.,25s/^/# /where ".,25s" stands for "from the current line to line number 25" and the sequence added to comment a line is "# " (hash plus a white space).For a single line::11s/^/# /for the 11th line or:.s/^/# /for the current line pointed by

Print the Copiright Sign in Python

2008-01-09T07:44:00.000-08:00

To print the Copiright Sign with Python we need to use the Unicode string literal format.A quoted string with a "u" or a "U" just before the leading quote is an Unicode string.The escape sequence "\N{name}" prints the character specified by "name", where "name" is a standard Unicode name, a s listed in www.unicode.org/charts/Example:print u'\N{Copyright Sign}'prints the Copyright sign.

Grave errore di stampa del OR logico nel libro C++ di Dietel (Apogeo)

2007-07-10T11:37:00.000-07:00

(An English version of this post follows at the end)Se anche voi, come me, avete ottenuto un errore di compilazione del tipostray '\166' in program...sicuramente state seguendo la versione italiana del libro di Dietel & Dietel "C++ Fondamenti di Programmazione" (seconda edizione, delle altre non so) !!!!! ;-)In tutto il libro, dopo aver introdotto in modo corretto l'operatore OR logico "||" a

Ganga Job submit() over Grid ... could have never started!! :-D

2007-05-15T08:52:00.000-07:00

He he he!!! :)It was some hours that I tried to submit an Athena job over the Grid with Ganga......the job was "loaded" fine, but it remained always in the "new" status.In the end...I discovered that I mispelled the submit command into my python job script........in the last line I usedjob.submitinstead ofjob.submit()Ah ah ah!!!! :-D ;-) Hence the numerous jobs I launched...never started!!!

How to fix "cannot access parent directories" shell error. (Also with Ganga,DQ2 on Grid)

2007-05-15T01:41:00.000-07:00

If you are working in a shell and you get an error like this:shell-init: error retrieving current directory: getcwd: cannot access parent directories: No such file or directoryprobably you are working in a directory you have deleted from within another shell. I.e. you are in shell A and you are working within /home/Joe/test/ folder. After a while you open a new shell B and you work there. After

How to fix the TortoiseSVN "invalid port number" problem

2007-05-08T11:50:00.000-07:00

I waste a while to find the solution to this problem, searching the web and trying and melting various recipes. The following solution worked fine for me, both for plain TortoiseSVN under Windows.Problem: When you try to connect to the repository hosted by another machine over a network (LAN or Internet) with SSH protocol, using PuTTY as client, you get an error like this:"Invalid Port Number"and

How to safely use backspace with VI editor under linux?

2007-05-04T06:35:00.000-07:00

Sometimes, when you log on a linux machine and try to edit a file with VI editor, you get characters like '?>' when you click on backspace in order to delete a string. How to fix it?Solution:In your HOME directory (if you don't know where is it, just type 'cd' at the prompt) edit your .bashrc (or your .bash_profile) file and add these lines:#Let VI work with Backspaceecho "I run 'stty sane'"stty

how to show the MAC address, IP, Host Name and Gateway on Windows with ipconfig

2007-05-03T03:12:00.000-07:00

Do you want to know your MAC address (the physical address of your Ethernet LAN card) on your Windows machine?Open a Command Prompt window and type:ipconfig /allYou'll get many parameters; among them the most useful are:Host name --> Your machine name. You can use this name to connect to your machine from within other machines in your LAN;Physical address --> Your Ethernet card MAC-address;IP

PyDev + Eclipse Error Message. How to configure the Python interpreter

2007-05-02T04:16:00.000-07:00

If you installed the PyDev plugin into Eclipse, you may get this message when you start up Eclipse:An internal error occurred during: "PyDev code completion: rebuilding modules"It means that, during the rebuilding of the Code Completion Tool, the Python interpreter has not been found. It happens when your Python system was not installed on the default folder (c:\Python); for example mine is

I discovered an extraordinary Tango singer: Giovanna!

2007-04-29T15:13:00.000-07:00

By chance yesterday night I discovered the song "Trenzas" by Giovanna; it was played on a myspace.com site.I was fascinated by the warmth of her voice, by the music and by the guitar .......Amazing!! I listened it six or seven times in a row!! :-DGiovanna (Giovanna Facchinelli) is born in the "La Plata" region, between Argentina and Uruguay. She starts singing tango in 1994 and in these years

Show Character Entities on a web site or blog post

2007-04-29T10:42:00.000-07:00

Do you want to know how to show something like "<" too on your web site page or blog post? They are called character entities, and you can't show them "as is" because, if you just type them into your HTML code, the browser convert them into ">" symbols.But you can use this notation:"&-amp;lt" (without the minus sign!!) to show "<"P.S. You can visit http://www.w3schools.com/ to read more about

How to show HTML code in a web page or blog post

2007-04-29T10:08:00.000-07:00

Have you ever wanted to show some HTML code in your web site or in a post of your blog? For example in order to publish an HTML or web development tutorial.If you just type the code, you get errors or the code is not displayed.Solution: you have to use the "&-amp;lt" string (without minus sign!) instead of the "<" symbol in your code; and the "&-amp;gt" string (without minus sign!) instead of ">"

How change the 'author' name on your blogs (Blogger - .blogspot.com)

2007-04-29T09:34:00.000-07:00

Do you have different Blogger (blospot) blogs and you want to use different author names for your posts?Open the "Template" options page and go to "Edit HTML". Check "Expand Widgets" and look in the code for the "class=post-footer-line" string (you can use CTRL-F in Firefox to find it). You will look at this code:

A nice article on ROOT, Python, PyROOT, C++, C# and IronPython and perfomaces

2007-04-29T03:07:00.000-07:00

While I was searching the web to get information on PyROOT, I get this nice article written by another particle physicist guy :)He also did a little performance comparison about ROOT calls wrapped in C++, pure Python and IronPython code. http://gordonwatts.wordpress.com/2007/02/25/root-python-and-net/

Carlos Paz "Tarareando" (Orchestra di Piazza Vittorio)...is becoming a drug for me!! :)

2007-04-29T02:59:00.000-07:00

The "Orchestra di Piazza Vittorio" big band.One of the song is Carlos Paz's "Tarareando" . You can listen it at the MySpace of the band:http://www.myspace.com/orchestradipiazzavittorio When you open the page you'll find a player on the right side. Click on "Tarareando".....and SING LOUD!!!!!!! :-D ;-DP.S. You can visit the official site of the band at: http://www.orchestradipiazzavittorio.it/eng