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• from MS Biology to BS Computer Science [on hold]

  - by Air Borne

  I'm Marco from Italy and I'd like to ask you a piece of advice about my career. I hold a Ms degree in Biology, I enjoyed a lot studying it and I got very good grades but I didn't know what to do with my degree in the real life. Few months ago, I began to read a book about Python programming (Introduction to Computer Science, Zelle J.) and I've great fun learning Python as a beginner, I wake up in the morning thinking about doing excersies and writing simple programs with python :) I'm also watching free lectures from MIT open courseware, and I'm feeling a certain degree of regrets for never asking myself what was computer science, since it seems to me it's a magic world. After weeks of doubts, I made a move :) I applied for a CS bachelor degree abroad, I got an interview and I'm going to start this great adventure next September. I feel incredibly excited at it, but a little bit scared too. Scared because sometimes I think I'm making a great mistake for my life restarting from a bachelor in a completely different area of study. Sometimes I hear people saying the IT market is bad, sometimes I hear other ones saying quite the opposite instead. Moreover, some colleagues of mine suggested me to try to get into Bioinformatics, instead of CS. My question is: I want to really discover if CS is for me, I mean the passion of my life. I know I'm just a beginner and I can't say nothing about it yet. What do you suggest me: CS or Bioinformatics? If I get a Bs in CS, could I get into bioinformatics without relevant experience, taking into account I have a Ms Biology degree? Any comment is appreciated, thanks in advance.

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• How long can you be out of the MS market before it affects your career [closed]

  - by dave

  I've been working with .Net since it first came out and have done my best to use the latest and greatest things from Redmond. That being said, I've been working for the past year in the Python/Unix/Web world. In order to keep myself relevant in the MS world, I've been working part-time on a WPF project but I do not know how much longer that work will continue. So my question is: If I were to move totally to the Unix/Python/Web world, how long could I stay there before it starts getting hard to get another MS job? I am trying not to burn bridges in my career as I've found MS jobs pay better and tend to be more plentiful. PS: I like my Python job since it is something new and I get to work from home. It has provided a different view on coding that I've found useful. EDIT: I was out of the MS market for 12 months before attempting to get another MS job. No-one said "Gee you've been gone a while" but I did get a conspicuous lack of responses to job applications. My feeling is that the head-hunters do not bother to look beyond your last job. In the end, I got employment via my own network rather than the pimps. So, to answer my question: "not long, especially if you trust your career to head hunters."

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• Why do memory-managed languages retain the `new` keyword?

  - by Channel72

  The new keyword in languages like Java, Javascript, and C# creates a new instance of a class. This syntax seems to have been inherited from C++, where new is used specifically to allocate a new instance of a class on the heap, and return a pointer to the new instance. In C++, this is not the only way to construct an object. You can also construct an object on the stack, without using new - and in fact, this way of constructing objects is much more common in C++. So, coming from a C++ background, the new keyword in languages like Java, Javascript, and C# seemed natural and obvious to me. Then I started to learn Python, which doesn't have the new keyword. In Python, an instance is constructed simply by calling the constructor, like: f = Foo() At first, this seemed a bit off to me, until it occurred to me that there's no reason for Python to have new, because everything is an object so there's no need to disambiguate between various constructor syntaxes. But then I thought - what's really the point of new in Java? Why should we say Object o = new Object();? Why not just Object o = Object();? In C++ there's definitely a need for new, since we need to distinguish between allocating on the heap and allocating on the stack, but in Java all objects are constructed on the heap, so why even have the new keyword? The same question could be asked for Javascript. In C#, which I'm much less familiar with, I think new may have some purpose in terms of distinguishing between object types and value types, but I'm not sure. Regardless, it seems to me that many languages which came after C++ simply "inherited" the new keyword - without really needing it. It's almost like a vestigial keyword. We don't seem to need it for any reason, and yet it's there. Question: Am I correct about this? Or is there some compelling reason that new needs to be in C++-inspired memory-managed languages like Java, Javascript and C#?

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• "sha256sum mismatch jdk-7u3-linux-x64.tar.gz " error when trying to install Oracle Java

  - by Fawkes5

  i recently tried installed java 7 on ubuntu 12.04 and i think i screwed something up I followed the instructions given here. First you need to remove openjdk for this run the following command from your terminal sudo apt-get purge openjdk* Now you can install Java7 by adding the following repository: sudo add-apt-repository ppa:eugenesan/java sudo apt-get update sudo apt-get install oracle-java7-installer Now everytime i install a new program i get the following error: Download done. sha256sum mismatch jdk-7u3-linux-x64.tar.gz Oracle JDK 7 is NOT installed. dpkg: error processing oracle-java7-installer (--configure): subprocess installed post-installation script returned error exit status 1 Setting up python-central (0.6.17ubuntu1) ... Setting up python-eggtrayicon (2.25.3-11) ... Setting up gmail-notify (1.6.1.1-1ubuntu1) ... Processing triggers for python-central ... Errors were encountered while processing: oracle-java7-installer Error in function: However.The program seems to install and work just fine so it doesn't seem to be a problem preventing me from doing anything So then i reinstalled openjdk by going: sudo apt-get install openjdk* But i still get the same error. going: sudo apt-get install oracle-java7-installer gives me the same error. What is going on? Please let me know if this is clear or not and ill try to explain my issue better

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• What language and topics should be covered when teaching non-CS college students how to program?

  - by michaelcarrano

  I have been asked by many of my non-computer science friends to teach them how to program. I have agreed to hold a seminar for them that will last for approximately 1 to 2 hours. My thoughts are to use Python as the language to teach them basic programming skills. I figured Python is relatively easier to learn from what I have researched. It is also a language I want to learn which will make holding this seminar all the more enjoyable. The topics I plan to cover are as followed: Variables / Arrays Logic - If else statements, switch case, nested statements Loops - for, while, do-while and nested loops Functions - pass by value, pass by reference (is this the correct terms for Python? I am mostly a C/C++ person) Object Oriented Programming Of course, I plan to have code examples for all topics and I will try to have each example flow into each other so that at the end of the seminar everyone will have a complete working program. I suppose my question is, if you were given 1 to 2 hours to teach a group of college students how to program, what language would you choose and what topics would you cover? Update: Thank you for the great feedback. I should have mentioned in my earlier post above that a majority of the students attending the seminar have some form of programming experience whether it was with Java or using Matlab. Most of these students are 3rd/4th year Engineering students who want to get a refresher on programming before they graduate.

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• Hobbyist transitioning to earn money on paid work?

  - by Chelonian

  I got into hobbyist Python programming some years ago on a whim, having never programmed before other than BASIC way back when, and little by little have cobbled together a, in my opinion, nice little desktop application that I might try to get out there in some fashion someday. It's roughly 15,000 logical lines of code, and includes use of Python, wxPython, SQLite, and a number of other libraries, works on Win and Linux (maybe Mac, untested) and I've gotten some good feedback about the application's virtues from non-programmer friends. I've also done a small application for data collection for animal behavior experiments, and an ad hoc tool to help generate a web page...and I've authored some tutorials. I consider my Python skills to be appreciably limited, my SQL skills to be very limited, but I'm not totally out to sea, either (e.g. I did FizzBuzz in a few minutes, did a "Monty Hall Dilemma" simulator in some minutes, etc.). I also put a strong premium on quality user experience; that is, the look and feel matters much to me and the software looks quite good, I feel. I know no other programming languages yet. I also know the basics of HTML/CSS (not considering them programming languages) and have created an artist's web page (that was described by a friend as "incredibly slick"...it's really not, though), and have a scientific background. I'm curious: Aside from directly selling my software, what's roughly possible--if anything--in terms of earning either side money on gigs, or actually getting hired at some level in the software industry, for someone with this general skill set?

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• Problem with understanding how to start

  - by Coolface

  Okay, this might be a little off-topic but i try anyway. Sorry to bother. So i'm working as sysadmin for at least 5 years now and i quite enjoy IT field in general. Somehow i was never interested in programming much but always want to learn something at least easy and for personal usage. As sysadmin i need scripting skills so learn shell scripting without much problems, i also try to learn pascal, delphi, basic over time and must recent was python. Well, my problem is when i try to learn programming i just can't apply what i learn from the books to the real word. What i mean is i understand there are data structures, algorithms, variables, lib's, if-then logic, etc. but i just can't understand how to apply this things when i want to do real things. Like i want to get a something simple as parse web page, i draw a quick algorithm like get a web page, find a word on it and write a to file, on the paper everything look simple but when i get to the coding i just stuck pretty much from the start. I try read code of the real programs that just totally confusing especially big parts with many classes so i'm just quickly lost a trail what this code do. I think i just lack some fundamentals to see a big picture but don't really know what this might be? Or maybe i just don't have a passion to programming at all... My best bet was a shell scripting so i have really no problems to write complex scripts but this just not enough. Recently i was read around 5 or 6 python books because everyone say it's so easy even kid can code something but still no much luck, python is good and easy but i can't make something harder then a prodecurial style code like in bash for easy things but when i want harder things i'm still stuck. In college i was also not a math and tech guy and like to study non-tech stuff mostly like economy, psychology maybe that my problem? Anyway any advice would be greatly appriciated.

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• Mercurial extensions not working in Windows 7 x64?

  - by Samuel Meacham

  We are test driving Mercurial at work. We don't want to have to enter our user/pass each time we interact with a repository, so we set up the mercurial_keyring extension. We: Installed Python 2.6.5 (32 or 64 bit, depending on the system) Installed setuptools (for easy_install.exe) easy_install keyring easy_install mercurial_keyring And then made the appropriate changes to %userprofile%/mercurial.ini in the [auth] section. It works fine on my colleague's computer (32bit xp sp3), but it does not work on my machine (Windows 7 Ultimate x64). Also noteworthy, the setuptools had to be built from source on Win 7 x64 (python setup.py bdist_wininst, then run the resulting setuptools-0.6c11.win-amd64.exe). Using just hg.exe from the Mercurial 1.5 binary installation (the .msi), I get this error when I run hg.exe: * failed to import extension mercurial_keyring: No module named mercurial_keyring I tried to change my mercurial.ini, to specify the path to the mercurial_keyring.py file, instead of having mercurial find it (since it's in the PYTHONPATH). Old: [extensions] mercurial_keyring = New: [extensions] mercurial_keyring = c:/mercurial/extensions/mercurial_keyring.py The error changes to: abort: could not import module keyring! So while providing the path to the mercurial_keyring extension works, the dependent keyring module still cannot be found. After further investigation, it appears that NO extensions work. They all produce the error: * failed to import extension [extension name]: No module named [module name] It appears that when running hg.exe, it is not aware of PYTHONPATH. I have tried: Python 2.6.5 32 bit Python 2.6.5 64 bit Building Mercurial 1.5 from source with MinGW Building Mercurial 1.5 from source with MSVC9 Using hg.exe from the 1.5 binary dist (.msi) Using the hg.py in c:\python26\scripts when building from source Various configurations in %userprofile%/mercurial.ini Using setuptools (easy_install.exe) to install keyring and mercurial_keyring Building keyring and mercurial_keyring from source (python setup.py bdist_wininst) Nothing works. The closest I've got is using hg.py when building from source. It at least doesn't give me errors, and actually creates %userprofile%/wincrypto_pass.cfg when I enter my credentials. But on subsequent requests, it doesn't enter the credentials automatically. It prompts me for them again. Interestingly, TortoiseHG is using the keyring. I just can't get it to work on the command line. I think something is going on with Win 7 x64 that is preventing mercurial (hg.exe) from seeing the PYTHONPATH, so it can't find any of the installed modules. Does anyone have extensions working in Win 7 x64? Specifically with the binary installation of mercurial (not hg.py)?

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• Does weak typing offer any advantages?

  - by sub

  Don't confuse this with static vs. dynamic typing! You all know JavaScripts/PHPs infamous type systems: PHP example: echo "123abc"+2; // 125 - the reason for this is explained // in the PHP docs but still: This hurts echo "4"+1; // 5 - Oh please echo "ABC"*5; // 0 - WTF // That's too much, seriously now. // This here might be actually a use for weak typing, but no - // it has to output garbage. JavaScript example: // A good old JavaScript, maybe you'll do better? alert("4"+1); // 51 - Oh come on. alert("abc"*3); // NaN - What the... // Have your creators ever heard of the word "consistence"? Python example: # Python's type system is actually a mix # It spits errors on senseless things like the first example below AND # allows intelligent actions like the second example. >>> print("abc"+1) Traceback (most recent call last): File "<pyshell#2>", line 1, in <module> print("abc"+1) TypeError: Can't convert 'int' object to str implicitly >>> print("abc"*5) abcabcabcabcabc Ruby example: puts 4+"1" // Type error - as supposed puts "abc"*4 // abcabcabcabc - makes sense After these examples it should be clear that PHP/JavaScript probably have the most inconsistent type systems out there. This is a fact and really not subjective. Now when having a closer look at the type systems of Ruby and Python it seems like they are having a much more intelligent and consistent type system. I think these examples weren't really necessary as we all know that PHP/JavaScript have a weak and Python/Ruby have a strong type system. I just wanted to mention why I'm asking this. Now I have two questions: When looking at those examples, what are the advantages of PHPs and JavaScripts type systems? I can only find downsides: They are inconsistent and I think we know that this is not good Types conversions are hardly controllable Bugs are more likely to happen and much harder to spot Do you prefer one of the both systems? Why? Personally I have worked with PHP, JavaScript and Python so far and must say that Pythons type system has really only advantages over PHPs and JavaScripts. Does anybody here not think so? Why then?

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• trying to build Boost MPI, but the lib files are not created. What's going on?

  - by unknownthreat

  I am trying to run a program with Boost MPI, but the thing is I don't have the .lib. So I try to create one by following the instruction at http://www.boost.org/doc/libs/1_43_0/doc/html/mpi/getting_started.html#mpi.config The instruction says "For many users using LAM/MPI, MPICH, or OpenMPI, configuration is almost automatic", I got myself OpenMPI in C:\, but I didn't do anything more with it. Do we need to do anything with it? Beside that, another statement from the instruction: "If you don't already have a file user-config.jam in your home directory, copy tools/build/v2/user-config.jam there." Well, I simply do what it says. I got myself "user-config.jam" in C:\boost_1_43_0 along with "using mpi ;" into the file. Next, this is what I've done: bjam --with-mpi C:\boost_1_43_0>bjam --with-mpi WARNING: No python installation configured and autoconfiguration failed. See http://www.boost.org/libs/python/doc/building.html for configuration instructions or pass --without-python to suppress this message and silently skip all Boost.Python targets Building the Boost C++ Libraries. warning: skipping optional Message Passing Interface (MPI) library. note: to enable MPI support, add "using mpi ;" to user-config.jam. note: to suppress this message, pass "--without-mpi" to bjam. note: otherwise, you can safely ignore this message. warning: Unable to construct ./stage-unversioned warning: Unable to construct ./stage-unversioned Component configuration: - date_time : not building - filesystem : not building - graph : not building - graph_parallel : not building - iostreams : not building - math : not building - mpi : building - program_options : not building - python : not building - random : not building - regex : not building - serialization : not building - signals : not building - system : not building - test : not building - thread : not building - wave : not building ...found 1 target... The Boost C++ Libraries were successfully built! The following directory should be added to compiler include paths: C:\boost_1_43_0 The following directory should be added to linker library paths: C:\boost_1_43_0\stage\lib C:\boost_1_43_0> I see that there are many libs in C:\boost_1_43_0\stage\lib, but I see no trace of libboost_mpi-vc100-mt-1_43.lib or libboost_mpi-vc100-mt-gd-1_43.lib at all. These are the libraries required for linking in mpi applications. What could possibly gone wrong when libraries are not being built?

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• how much time does grid.py take to run ?

  - by trinity

  Hello all , I am using libsvm for binary classification.. I wanted to try grid.py , as it is said to improve results.. I ran this script for five files in separate terminals , and the script has been running for more than 12 hours.. this is the state of my 5 terminals now : [root@localhost tools]# python grid.py sarts_nonarts_feat.txt>grid_arts.txt Warning: empty z range [61.3997:61.3997], adjusting to [60.7857:62.0137] line 2: warning: Cannot contour non grid data. Please use "set dgrid3d". Warning: empty z range [61.3997:61.3997], adjusting to [60.7857:62.0137] line 4: warning: Cannot contour non grid data. Please use "set dgrid3d". [root@localhost tools]# python grid.py sgames_nongames_feat.txt>grid_games.txt Warning: empty z range [64.5867:64.5867], adjusting to [63.9408:65.2326] line 2: warning: Cannot contour non grid data. Please use "set dgrid3d". Warning: empty z range [64.5867:64.5867], adjusting to [63.9408:65.2326] line 4: warning: Cannot contour non grid data. Please use "set dgrid3d". [root@localhost tools]# python grid.py sref_nonref_feat.txt>grid_ref.txt Warning: empty z range [62.4602:62.4602], adjusting to [61.8356:63.0848] line 2: warning: Cannot contour non grid data. Please use "set dgrid3d". Warning: empty z range [62.4602:62.4602], adjusting to [61.8356:63.0848] line 4: warning: Cannot contour non grid data. Please use "set dgrid3d". [root@localhost tools]# python grid.py sbiz_nonbiz_feat.txt>grid_biz.txt Warning: empty z range [67.9762:67.9762], adjusting to [67.2964:68.656] line 2: warning: Cannot contour non grid data. Please use "set dgrid3d". Warning: empty z range [67.9762:67.9762], adjusting to [67.2964:68.656] line 4: warning: Cannot contour non grid data. Please use "set dgrid3d". [root@localhost tools]# python grid.py snews_nonnews_feat.txt>grid_news.txt Wrong input format at line 494 Traceback (most recent call last): File "grid.py", line 223, in run if rate is None: raise "get no rate" TypeError: exceptions must be classes or instances, not str I had redirected the outputs to files , but those files for now contain nothing.. And , the following files were created : sbiz_nonbiz_feat.txt.out sbiz_nonbiz_feat.txt.png sarts_nonarts_feat.txt.out sarts_nonarts_feat.txt.png sgames_nongames_feat.txt.out sgames_nongames_feat.txt.png sref_nonref_feat.txt.out sref_nonref_feat.txt.png snews_nonnews_feat.txt.out (-- is empty ) There's just one line of information in .out files.. the ".png" files are some GNU PLOTS . But i dont understand what the above GNUplots / warnings convey .. Should i re-run them ? Can anyone please tell me on how much time this script might take if each input file contains about 144000 lines.. Thanks and regards

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• Can't get MySQL to install

  - by James Marthenal

  I'd like to think I know what I'm doing in a Unix shell but maybe not. I made a mistake in a configuration file for MySQL, so I decided to just uninstall it and then reinstall it, so I did: sudo apt-get --purge remove mysql-server mysql-server-5.0 mysql-client The files were deleted, so I then tried to install it, but it didn't ask me for a root password or anything else, so I uninstalled it using the above command again and then did sudo rm -rf /etc/mysql sudo rm /etc/init.d/mysql sudo rm -rf /var/lib/mysql* I then restarted the computer then installed it again: sudo apt-get install mysql-server mysql-client It asked for a root password, and everything looked like it would work, until I saw this: $ sudo apt-get install mysql-server mysql-client Reading package lists... Done Building dependency tree Reading state information... Done The following extra packages will be installed: mysql-server-5.0 Suggested packages: tinyca The following NEW packages will be installed: mysql-client mysql-server mysql-server-5.0 0 upgraded, 3 newly installed, 0 to remove and 1 not upgraded. Need to get 0B/27.4MB of archives. After this operation, 86.7MB of additional disk space will be used. Do you want to continue [Y/n]? y WARNING: The following packages cannot be authenticated! mysql-server-5.0 mysql-client mysql-server Authentication warning overridden. Preconfiguring packages ... Can't exec "/tmp/mysql-server-5.0.config.28101": Permission denied at /usr/share/perl/5.10/IPC/Open3.pm line 168. open2: exec of /tmp/mysql-server-5.0.config.28101 configure failed at /usr/share/perl5/Debconf/ConfModule.pm line 59 mysql-server-5.0 failed to preconfigure, with exit status 255 Selecting previously deselected package mysql-server-5.0. (Reading database ... 160284 files and directories currently installed.) Unpacking mysql-server-5.0 (from .../mysql-server-5.0_5.0.51a-24+lenny5_amd64.deb) ... Selecting previously deselected package mysql-client. Unpacking mysql-client (from .../mysql-client_5.0.51a-24+lenny5_all.deb) ... Selecting previously deselected package mysql-server. Unpacking mysql-server (from .../mysql-server_5.0.51a-24+lenny5_all.deb) ... Processing triggers for man-db ... Setting up mysql-server-5.0 (5.0.51a-24+lenny5) ... Stopping MySQL database server: mysqld. /var/lib/dpkg/info/mysql-server-5.0.postinst: line 144: /etc/mysql/conf.d/old_passwords.cnf: No such file or directory dpkg: error processing mysql-server-5.0 (--configure): subprocess post-installation script returned error exit status 1 Setting up mysql-client (5.0.51a-24+lenny5) ... dpkg: dependency problems prevent configuration of mysql-server: mysql-server depends on mysql-server-5.0; however: Package mysql-server-5.0 is not configured yet. dpkg: error processing mysql-server (--configure): dependency problems - leaving unconfigured Errors were encountered while processing: mysql-server-5.0 mysql-server E: Sub-process /usr/bin/dpkg returned an error code (1) Now I can't seem to figure out what to do. I just want to get a clean MySQL installation at this point. I'm running the latest stable release of Debian. All help is appreciated—thanks! Edit: I looked at this similar question, which suggests that I uninstall mysql-common, but when I try to do so I see: The following packages will be REMOVED: apache2 apache2-mpm-prefork apache2-utils apache2.2-common git-svn libapache2-mod-php5 libapache2-mod-python libapache2-svn libaprutil1 libdbd-mysql-perl libdbd-mysql-rubygem libmysql-ruby libmysql-ruby1.8 libmysql-rubygem libmysqlclient15-dev libmysqlclient15off librdf-perl librdf0 libserf-0-0 libsvn-perl libsvn1 mysql-client-5.0 mysql-common mytop ndn-apache22-php5 ndn-apache22-svn ndn-interpreters ndn-lighttpd ndn-netsaint-plugins ndn-perl-modules ndn-php5-cgi ndn-php5-xcache ndn-php53 ndn-php53-suhosin ndn-rubygems php5 php5-mcrypt php5-mysql proftpd proftpd-mod-mysql python-django python-mysqldb python-subversion python-svn subversion subversion-tools trac zendoptimizer 0 upgraded, 0 newly installed, 48 to remove and 1 not upgraded. Eeek! Any suggestions?

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• Why is my machine unable to mount my SMB drives ("CIFS VFS: Error connecting to socket. Aborting operation", return code -115)?

  - by downbeat

  I have a machine running Precise (12.04 x64), and I cannot mount my SMB drives (I have 3, we'll call them public, private and download). It used to work (a week or two ago) and I didn't touch fstab! The machine hosting the shares is a commercial NAS, and I'm not seeing anything that would indicate it's an issue with the NAS. I have an older machine which I updated to Precise at the same time (both fresh installed, not dist-upgrade), so should have a very similar configuration. It is not having any problems. I am not having problems on windows machines/partitions either, only one of my Precise machines. The two machines are using identical entries in fstab and identical /etc/samba/smb.conf files. I don't think I've ever changed smb.conf (has never mattered before). My fstab entries all basically look like this: //10.1.1.111/public /media/public cifs credentials=/home/downbeat/.credentials,iocharset=utf8,uid=downbeat,gid=downbeat,file_mode=0644,dir_mode=0755 0 0 Here's the dmesg output on boot: [ 51.162198] CIFS VFS: Error connecting to socket. Aborting operation [ 51.162369] CIFS VFS: cifs_mount failed w/return code = -115 [ 51.194106] CIFS VFS: Error connecting to socket. Aborting operation [ 51.194250] CIFS VFS: cifs_mount failed w/return code = -115 [ 51.198120] CIFS VFS: Error connecting to socket. Aborting operation [ 51.198243] CIFS VFS: cifs_mount failed w/return code = -115 There are no other errors I see in the dmesg output. Originally when I ran 'testparm -s', the output contained these lines ERROR: lock directory /var/run/samba does not exist ERROR: pid directory /var/run/samba does not exist Here's the samba related programs I have installed: $ dpkg --list|grep -i samba ii libpam-winbind 2:3.6.3-2ubuntu2.3 Samba nameservice and authentication integration plugins ii libwbclient0 2:3.6.3-2ubuntu2.3 Samba winbind client library ii nautilus-share 0.7.3-1ubuntu2 Nautilus extension to share folder using Samba ii python-smbc 1.0.13-0ubuntu1 Python bindings for Samba clients (libsmbclient) ii samba-common 2:3.6.3-2ubuntu2.3 common files used by both the Samba server and client ii samba-common-bin 2:3.6.3-2ubuntu2.3 common files used by both the Samba server and client ii winbind 2:3.6.3-2ubuntu2.3 Samba nameservice integration server $ dpkg --list|grep -i smb ii dmidecode 2.11-4 SMBIOS/DMI table decoder ii libsmbclient 2:3.6.3-2ubuntu2.3 shared library for communication with SMB/CIFS servers ii python-smbc 1.0.13-0ubuntu1 Python bindings for Samba clients (libsmbclient) ii smbclient 2:3.6.3-2ubuntu2.3 command-line SMB/CIFS clients for Unix ii smbfs 2:5.1-1ubuntu1 Common Internet File System utilities - compatibility package $ dpkg --list|grep -i cifs ii cifs-utils 2:5.1-1ubuntu1 Common Internet File System utilities ii libsmbclient 2:3.6.3-2ubuntu2.3 shared library for communication with SMB/CIFS servers ii smbclient 2:3.6.3-2ubuntu2.3 command-line SMB/CIFS clients for Unix I originally noticed that my other machine had "libpam-winbind" and "nautilus-share" installed and the machine with the issue did not. Installing those two packages solved my errors with 'testparm -s', but did not fix my issue. Finally, I tried to purge and reinstall these packages smbclient smbfs cifs-utils samba-common samba-common-bin Still no luck. Again, it used to work; now it doesn't. Very similarly configured machine works (but some packages are out of date on the working machine). The NAS has only one interface/IP address, nmblookup works to find it's IP from it's hostname (from the machine with the issue) and it responds to a ping. Please any help would be great. I've been searching on AskUbuntu, SuperUser, ubuntuforums and plain old search engines for a week now and it's driving me crazy!

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• A problem with conky in Gnome 3.4 [closed]

  - by Pranit Bauva

  Possible Duplicate: Conky not working in Gnome 3.4 My conky in Gnome 3.4 is not working. When I run a conky script nothing appears but the process is running. Please also see the debug code : pungi-man@pungi-man:~$ sh conky_startup.sh Conky: forked to background, pid is 3157 Conky: desktop window (c00023) is subwindow of root window (aa) Conky: window type - override Conky: drawing to created window (0x2200001) Conky: drawing to double buffer My conky script is : background yes update_interval 1 cpu_avg_samples 2 net_avg_samples 2 temperature_unit celsius double_buffer yes no_buffers yes text_buffer_size 2048 gap_x 10 gap_y 30 minimum_size 190 450 maximum_width 190 own_window yes own_window_type override own_window_transparent yes own_window_hints undecorate,sticky,skip_taskbar,skip_pager,below border_inner_margin 0 border_outer_margin 0 alignment tr draw_shades no draw_outline no draw_borders no draw_graph_borders no override_utf8_locale yes use_xft yes xftfont caviar dreams:size=8 xftalpha 0.5 uppercase no default_color FFFFFF color1 DDDDDD color2 AAAAAA color3 888888 color4 666666 lua_load /home/pungi-man/.conky/conky_grey.lua lua_draw_hook_post main TEXT ${voffset 35} ${goto 95}${color4}${font ubuntu:size=22}${time %e}${color1}${offset -50}${font ubuntu:size=10}${time %A} ${goto 85}${color2}${voffset -2}${font ubuntu:size=9}${time %b}${voffset -2} ${color3}${font ubuntu:size=12}${time %Y}${font} ${voffset 80} ${goto 90}${font Ubuntu:size=7,weight:bold}${color}CPU ${goto 90}${font Ubuntu:size=7,weight:normal}${color1}${top name 1}${alignr}${top cpu 1}% ${goto 90}${font Ubuntu:size=7,weight:normal}${color2}${top name 2}${alignr}${top cpu 2}% ${goto 90}${font Ubuntu:size=7,weight:normal}${color3}${top name 3}${alignr}${top cpu 3}% ${goto 90}${cpugraph 10,100 666666 666666} ${goto 90}${voffset -10}${font Ubuntu:size=7,weight:normal}${color}${threads} process ${voffset 20} ${goto 90}${font Ubuntu:size=7,weight:bold}${color}MEM ${goto 90}${font Ubuntu:size=7,weight:normal}${color1}${top_mem name 1} ${alignr}${top_mem mem 1}% ${goto 90}${font Ubuntu:size=7,weight:normal}${color2}${top_mem name 2} ${alignr}${top_mem mem 2}% ${goto 90}${font Ubuntu:size=7,weight:normal}${color3}${top_mem name 3} ${alignr}${top_mem mem 3}% ${voffset 15} ${goto 90}${font Ubuntu:size=7,weight:bold}${color}DISKS ${goto 90}${diskiograph 30,100 666666 666666}${voffset -30} ${goto 90}${font Ubuntu:size=7,weight:normal}${color}used: ${fs_used /home} /home ${goto 90}${font Ubuntu:size=7,weight:normal}${color}used: ${fs_used /} / ${voffset 10} ${goto 70}${font Ubuntu:size=18,weight:bold}${color3}NET${alignr}${color2}${font Ubuntu:size=7,weight:bold}${color1}${if_up eth0}eth ${addr eth0} ${endif}${if_up wlan0}wifi ${addr wlan0}${endif} ${goto 90}${font Ubuntu:size=7,weight:bold}${color}open ports: ${alignr}${color2}${tcp_portmon 1 65535 count} ${goto 90}${font Ubuntu:size=7,weight:bold}${color}${offset 10}IP${alignr}DPORT ${goto 90}${font Ubuntu:size=7,weight:normal}${color1}${tcp_portmon 1 65535 rip 0}${alignr 1}${tcp_portmon 1 65535 rport 0} ${goto 90}${font Ubuntu:size=7,weight:normal}${color1}${tcp_portmon 1 65535 rip 1}${alignr 1}${tcp_portmon 1 65535 rport 1} ${goto 90}${font Ubuntu:size=7,weight:normal}${color1}${tcp_portmon 1 65535 rip 2}${alignr 1}${tcp_portmon 1 65535 rport 2} ${goto 90}${font Ubuntu:size=7,weight:normal}${color1}${tcp_portmon 1 65535 rip 3}${alignr 1}${tcp_portmon 1 65535 rport 3} ${goto 90}${font Ubuntu:size=7,weight:normal}${color1}${tcp_portmon 1 65535 rip 4}${alignr 1}${tcp_portmon 1 65535 rport 4} ${goto 90}${font Ubuntu:size=7,weight:normal}${color1}${tcp_portmon 1 65535 rip 5}${alignr 1}${tcp_portmon 1 65535 rport 5} ${goto 90}${font Ubuntu:size=7,weight:normal}${color1}${tcp_portmon 1 65535 rip 6}${alignr 1}${tcp_portmon 1 65535 rport 6} ${goto 90}${font Ubuntu:size=7,weight:normal}${color1}${tcp_portmon 1 65535 rip 7}${alignr 1}${tcp_portmon 1 65535 rport 7} ${goto 90}${font Ubuntu:size=7,weight:normal}${color1}${tcp_portmon 1 65535 rip 8}${alignr 1}${tcp_portmon 1 65535 rport 8} ${goto 90}${font Ubuntu:size=7,weight:normal}${color1}${tcp_portmon 1 65535 rip 9}${alignr 1}${tcp_portmon 1 65535 rport 9} ${goto 90}${font Ubuntu:size=7,weight:normal}${color1}${tcp_portmon 1 65535 rip 10}${alignr 1}${tcp_portmon 1 65535 rport 10} ${goto 90}${font Ubuntu:size=7,weight:normal}${color1}${tcp_portmon 1 65535 rip 11}${alignr 1}${tcp_portmon 1 65535 rport 11} ${goto 90}${font Ubuntu:size=7,weight:normal}${color1}${tcp_portmon 1 65535 rip 12}${alignr 1}${tcp_portmon 1 65535 rport 12} ${goto 90}${font Ubuntu:size=7,weight:normal}${color1}${tcp_portmon 1 65535 rip 13}${alignr 1}${tcp_portmon 1 65535 rport 13} ${goto 90}${font Ubuntu:size=7,weight:normal}${color1}${tcp_portmon 1 65535 rip 14}${alignr 1}${tcp_portmon 1 65535 rport 14} This script works fine with unity but faces problems in gnome 3.4 Can anyone please sort it out?

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• Announcing Oracle Knowledge 8.5: Even Superheroes Need Upgrades

  - by Richard Lefebvre

  It’s no secret that we like Iron Man here at Oracle. We've certainly got stuff in common: one of the world’s largest technology companies and one of the world’s strongest technology-driven superheroes. If you've seen the recent Iron Man movies, you might have even noticed some of our servers sitting in Tony Stark’s lab. Heck, our CEO made a cameo appearance in one of the movies. Yeah, we’re fans. Especially as Iron Man is a regular guy with some amazing technology – like us. But Like all great things even Superheroes need upgrades, whether it’s their suit, their car or their spacestation. Oracle certainly has its share of advanced technology.  For example, Oracle acquired InQuira in 2011 after years of watching the company advance the science of Knowledge Management.  And it was some extremely super technology.  At that time, Forrester’s Kate Leggett wrote about it in ‘Standalone Knowledge Management Is Dead With Oracle's Announcement To Acquire InQuira’ saying ‘Knowledge, accessible via web self-service or agent UIs, is a critical customer service component for industries fielding repetitive questions about policies, procedures, products, and solutions.’  One short sentence that amounts to a very tall order.  Since the acquisition our KM scientists have been hard at work in their labs. Today Oracle announced its first major knowledge management release since its acquisition of InQuira: Oracle Knowledge 8.5. We’ve put a massively-upgraded supersuit on our KM solution because we still have bad guys to fight. And we are very proud to say that we went way beyond our original plans. So what, exactly, did we do in Oracle Knowledge 8.5? We did what any high-tech super-scientist would do. We made Oracle Knowledge smarter, stronger and faster. First, we gave Oracle Knowledge a stronger heart: Certified on Oracle technologies, including Oracle WebLogic Server, Oracle Business Intelligence, Oracle Exadata Database Machine and Oracle Exalogic Elastic Cloud. Huge scaling and performance improvements. Then we gave it a better reach: Improved iConnect functionality that delivers contextualized knowledge directly into CRM applications. Better content acquisition support across disparate sources. Enhanced Language Support including Natural Language search support for 16 Languages. Enhanced Keyword Search for 23 authoring languages, as well as enhanced out-of-the-box industry ontologies covering 14 languages. And finally we made Oracle Knowledge ridiculously smarter: Improved Natural Language Search and a new Contextual Answer Delivery that understands the true intent of each inquiry to deliver the best possible answers. AnswerFlow for Guided Navigation & Answer Delivery, a new application for guided troubleshooting and answer delivery. Knowledge Analytics standardized on Oracle’s Business Intelligence Enterprise Edition. Knowledge Analytics Dashboards optimized search and content creation through targeted, actionable insights. A new three-level language model "Global - Language - Locale" that provides an improved search experience for organizations with a global footprint. We believe that Oracle Knowledge 8.5 is the most sophisticated KM solution in existence today and we’ve worked very hard to help it fulfill the promise of KM: empowering customers and employees with deep insights wherever they need them. We hope you agree it’s a suit worth wearing. We are continuing to invest in Knowledge Management as it continues to be especially relevant today with the enterprise push for peer collaboration, crowd-sourced wisdom, agile innovation, social interaction channels, applied real-time analytics, and personalization. In fact, we believe that Knowledge Management is a critical part of the Customer Experience portfolio for success. From empowering employee’s, to empowering customers, to gaining the insights from interactions across all channels, businesses today cannot efficiently scale their efforts, strengthen their customer relationships or achieve their growth goals without a solid Knowledge Management foundation to build from. And like every good superhero saga, we’re not even close to being finished. Next we are taking Oracle Knowledge into the Cloud. Yes, we’re thinking what you’re thinking: ROCKET BOOTS! Stay tuned for the next adventure… By Nav Chakravarti, Vice-President, Product Management, CRM Knowledge and previously the CTO of InQuira, a knowledge management company acquired by Oracle in 2011

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• Announcing Oracle Knowledge 8.5: Even Superheroes Need Upgrades

  - by Chris Warner

  It’s no secret that we like Iron Man here at Oracle. We've certainly got stuff in common: one of the world’s largest technology companies and one of the world’s strongest technology-driven superheroes. If you've seen the recent Iron Man movies, you might have even noticed some of our servers sitting in Tony Stark’s lab. Heck, our CEO made a cameo appearance in one of the movies. Yeah, we’re fans. Especially as Iron Man is a regular guy with some amazing technology – like us. But Like all great things even Superheroes need upgrades, whether it’s their suit, their car or their spacestation. Oracle certainly has its share of advanced technology.  For example, Oracle acquired InQuira in 2011 after years of watching the company advance the science of Knowledge Management.  And it was some extremely super technology.  At that time, Forrester’s Kate Leggett wrote about it in ‘Standalone Knowledge Management Is Dead With Oracle's Announcement To Acquire InQuira’ saying ‘Knowledge, accessible via web self-service or agent UIs, is a critical customer service component for industries fielding repetitive questions about policies, procedures, products, and solutions.’  One short sentence that amounts to a very tall order.  Since the acquisition our KM scientists have been hard at work in their labs. Today Oracle announced its first major knowledge management release since its acquisition of InQuira: Oracle Knowledge 8.5. We’ve put a massively-upgraded supersuit on our KM solution because we still have bad guys to fight. And we are very proud to say that we went way beyond our original plans. So what, exactly, did we do in Oracle Knowledge 8.5? We did what any high-tech super-scientist would do. We made Oracle Knowledge smarter, stronger and faster. First, we gave Oracle Knowledge a stronger heart: Certified on Oracle technologies, including Oracle WebLogic Server, Oracle Business Intelligence, Oracle Exadata Database Machine and Oracle Exalogic Elastic Cloud. Huge scaling and performance improvements. Then we gave it a better reach: Improved iConnect functionality that delivers contextualized knowledge directly into CRM applications. Better content acquisition support across disparate sources. Enhanced Language Support including Natural Language search support for 16 Languages. Enhanced Keyword Search for 23 authoring languages, as well as enhanced out-of-the-box industry ontologies covering 14 languages. And finally we made Oracle Knowledge ridiculously smarter: Improved Natural Language Search and a new Contextual Answer Delivery that understands the true intent of each inquiry to deliver the best possible answers. AnswerFlow for Guided Navigation & Answer Delivery, a new application for guided troubleshooting and answer delivery. Knowledge Analytics standardized on Oracle’s Business Intelligence Enterprise Edition. Knowledge Analytics Dashboards optimized search and content creation through targeted, actionable insights. A new three-level language model "Global - Language - Locale" that provides an improved search experience for organizations with a global footprint. We believe that Oracle Knowledge 8.5 is the most sophisticated KM solution in existence today and we’ve worked very hard to help it fulfill the promise of KM: empowering customers and employees with deep insights wherever they need them. We hope you agree it’s a suit worth wearing. We are continuing to invest in Knowledge Management as it continues to be especially relevant today with the enterprise push for peer collaboration, crowd-sourced wisdom, agile innovation, social interaction channels, applied real-time analytics, and personalization. In fact, we believe that Knowledge Management is a critical part of the Customer Experience portfolio for success. From empowering employee’s, to empowering customers, to gaining the insights from interactions across all channels, businesses today cannot efficiently scale their efforts, strengthen their customer relationships or achieve their growth goals without a solid Knowledge Management foundation to build from. And like every good superhero saga, we’re not even close to being finished. Next we are taking Oracle Knowledge into the Cloud. Yes, we’re thinking what you’re thinking: ROCKET BOOTS! Stay tuned for the next adventure… By Nav Chakravarti, Vice-President, Product Management, CRM Knowledge and previously the CTO of InQuira, a knowledge management company acquired by Oracle in 2011. 

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• Live vom Oracle Partner Day 2012 in Frankfurt

  - by A&C Redaktion

  Frankfurt a. M. gegen 11:30 UhrCharmante Idee, mit einem Welcome-Lunch in den Oracle Partner Day 2012 zu starten. So kann man bei einem Snack auch gleich die beeindruckende Atmosphäre der Commerzbank Arena auf sich wirken lassen und ist, ehe man sich versieht, mit dem nebenstehenden Geschäftsführer, einer Managerin und zwei Vertriebsmitarbeitern in ein Gespräch über die jeweils letzten Stadionbesuche verwickelt. Überall fröhliches Wiedersehen, viele haben sich das letzte Mal vor genau einem Jahr getroffen, im Radisson Blu, beim OPN Day Satellite. So, die Masse setzt sich in Bewegung – auf geht’s zur Eröffnung: Silvia Kaske fängt an! 13:45 Uhr Die Keynotes waren mal wieder ein thematischer Rundumschlag – und ein kleines Who-is-Who im Oracle Universum zugleich: Silvia Kaske, Senior Director Channel A&C eröffnete den Partner Day, danach stellte David Callaghan (Senior Vice President UK, Ireland, Israel) die EMEA-Strategien für das FY13 vor und Jürgen Kunz (SVP Technology Northern Europe & Country Leader Germany) sprach über die Geschäftsmöglichkeiten mit Partnern. Christian Werner gab in seiner neuen Funktion als Senior Director Alliances & Channels Germany einen Überblick über die neue Struktur des Oracle Channels und stellte das deutsche Team vor. Zum Abschluss folgte mit Prof. Hermann Maurer ein Gastredner von der Academia Europaea, einer prominent besetzten akademischen Gesellschaft, die sich dem besseren Verständnis der Wissenschaft in der Öffentlichkeit verschrieben hat. Er wagte einen Blick in die Zukunft der IT: „Das Beste kommt erst noch“. Wie immer, in einem so komprimierten Programm, bleibt noch die eine oder andere Frage – aber jetzt ist ja Zeit, bei Coffee & Networking noch mal nachzufragen. Kurz nach 14 Uhr Viele haben inzwischen auch das erste Obergeschoss erkundet. In der Partner Service Zone ist das Angebot breit gefächert: Von Oracle Financing über das License Management bis hin zu OPN Specialized dreht sich hier alles um konkrete Angebote für Partner. Nach einem kurzen Abstecher in die ISV-Lounge, geht es weiter zur Expert Zone: Oracle Database, Oracle Options, Fusion Middleware, Applications und Oracle Hardware heißen hier die Themen und an den Infoständen wird bereits lautstark gefachsimpelt. Zurück im Erdgeschoss sieht man noch diverse Partner, Oracle Executives und andere Teilnehmer durcheinander wuseln, um ihre Breakout Session zu finden. Andere blättern im druckfrischen A&C Kursbuch. In den nächsten zwei Stunden stehen Business Opportunities im Fokus – aufgeteilt nach Hardware, Technology oder Sales Partnern – dazu noch die Angebote der VADs, die A&C Partner Sessions und das 1:1 Speed Dating. Einige Partner nutzen parallel die angebotenen Implementation Tests, um direkt vor Ort die Zertifizierung zu erhalten. Das doppelte Angebot der Breakouts ermöglicht den Teilnehmern, an möglichst vielen Sessions nacheinander teilzunehmen. Kein Thema soll zu kurz kommen! Ein AusblickWas erwartet uns noch, im Laufe des Nachmittags? Sehr informativ wird sicherlich das Leader Panel, in dem die teilnehmenden Partner Fragen an Oracle Executives stellen können. Wenn dann die ersten Teilnehmer unruhig werden, hat das nichts mit den Themen zu tun. Nein, es steht vielmehr noch ein spannender Höhepunkt bevor: die Partner Award Ceremony (über die wir später ausführlich berichten werden). Nach einer hoffentlich gelungenen Veranstaltung stellt sich zum Schluss nur noch die Frage, was sich genau hinter der „Red Stack Arena Sports Challenge“ verbirgt. Brauchen wir Turnschuhe?

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• apt-get upgrade stuck at the same package

  - by decibyte

  Current status I've started to suspect this is not an Ubuntu issue, but related to the internet connection here at my work. Until I'm sure, Im leaving my question below: Original question I'm stuck, can't upgrade my system. Running sudo apt-get upgrade gives me the following: mmm@alalunga:~$ sudo apt-get upgrade Reading package lists... Done Building dependency tree Reading state information... Done The following packages have been kept back: ginn libgrip0 linux-generic-pae linux-headers-generic-pae linux-image-generic-pae The following packages will be upgraded: apport apport-gtk bind9-host build-essential dhcp3-client dhcp3-common dnsutils eog evince evince-common firefox firefox-branding firefox-dbg firefox-globalmenu firefox-gnome-support firefox-locale-en gimp gimp-data gir1.2-totem-1.0 glib-networking glib-networking-common glib-networking-services gnupg gpgv icedtea-6-jre-cacao icedtea-6-jre-jamvm icedtea-6-plugin icedtea-netx icedtea-netx-common icedtea-plugin isc-dhcp-client isc-dhcp-common libapache2-mod-php5 libart-2.0-2 libbind9-80 libdns81 libevince3-3 libgimp2.0 libisc83 libisccc80 libisccfg82 liblwres80 libssl-dev libssl-doc libssl1.0.0 libtotem0 linux-firmware linux-libc-dev openjdk-6-jre openjdk-6-jre-headless openjdk-6-jre-lib openssl php-pear php5-cli php5-common php5-curl php5-dev php5-gd php5-mysql php5-xsl policykit-1-gnome python-apport python-django python-gst0.10 python-problem-report resolvconf thunderbird thunderbird-globalmenu thunderbird-gnome-support totem totem-common totem-mozilla totem-plugins xserver-xorg-input-synaptics 74 upgraded, 0 newly installed, 0 to remove and 5 not upgraded. Need to get 317 MB/327 MB of archives. After this operation, 1.481 kB of additional disk space will be used. Do you want to continue [Y/n]? Get:1 http://archive.ubuntu.com/ubuntu/ precise-updates/main openjdk-6-jre-headless i386 6b24-1.11.4-1ubuntu0.12.04.1 [27,3 MB] Get:2 http://archive.ubuntu.com/ubuntu/ precise-updates/main openjdk-6-jre-headless i386 6b24-1.11.4-1ubuntu0.12.04.1 [27,3 MB] Get:3 http://archive.ubuntu.com/ubuntu/ precise-updates/main openjdk-6-jre-headless i386 6b24-1.11.4-1ubuntu0.12.04.1 [27,3 MB] Get:4 http://archive.ubuntu.com/ubuntu/ precise-updates/main openjdk-6-jre-headless i386 6b24-1.11.4-1ubuntu0.12.04.1 [27,3 MB] Get:5 http://archive.ubuntu.com/ubuntu/ precise-updates/main openjdk-6-jre-headless i386 6b24-1.11.4-1ubuntu0.12.04.1 [27,3 MB] Get:6 http://archive.ubuntu.com/ubuntu/ precise-updates/main openjdk-6-jre-headless i386 6b24-1.11.4-1ubuntu0.12.04.1 [27,3 MB] Get:7 http://archive.ubuntu.com/ubuntu/ precise-updates/main openjdk-6-jre-headless i386 6b24-1.11.4-1ubuntu0.12.04.1 [27,3 MB] 9% [7 openjdk-6-jre-headless 27,3 MB/27,3 MB 100%] It keeps downloading the package openjdk-6-jre-headless, then does nothing for a while (hanging on what's the last line above), then download the package again. It's at its 13th download attempt at the moment of writing. The actual downloads seem to be done just fine, but whatever it does after downloading seems to be failing. I tried removing openjdk-6, but then it wanted to install openjdk-7 instead, with the same result, hanging at openjdk-7-jre-headless instead. I also tried changing servers from my local (Danish) to the main server. No luck. It's also keeping me from upgrading alle the other packages. What to do? Update After following instructions in the answer by @lpanebr, it is now stuck at the linux-firmware package. So, maybe it's a more general problem than being related to specific package(s)? Although it did download some packages without problems before getting stuck at linux-firmware.

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• Government Mandates and Programming Languages

  A recent SEC proposal (which, at over 600 pages, I havent read in any detail) includes the following: We are proposing to require the filing of a computer program (the waterfall computer program, as defined in the proposed rule) of the contractual cash flow provisions of the securities in the form of downloadable source code in Python, a commonly used computer programming language that is open source and interpretive. The computer program would be tagged in XML and required to be filed with the Commission as an exhibit. Under our proposal, the filed source code for the computer program, when downloaded and run (by loading it into an open Python session on the investors computer), would be required to allow the user to programmatically input information from the asset data file that we are proposing to require as described above. We believe that, with the waterfall computer program and the asset data file, investors would be better able to conduct their own evaluations of ABS and may be less likely to be dependent on the opinions of credit rating agencies. With respect to any registration statement on Form SF-1 (Section 239.44) or Form SF-3 (Section 239.45) relating to an offering of an asset-backed security that is required to comply with Item 1113(h) of Regulation AB, the Waterfall Computer Program (as defined in Item 1113(h)(1) of Regulation AB) must be written in the Python programming language and able to be downloaded and run on a local computer properly configured with a Python interpreter. The Waterfall Computer Program should be filed in the manner specified in the EDGAR Filer Manual. I dont see how it can be in investors best interests that the SEC demand a particular programming language be used for software related to investment data.  I have a feeling that investors who use computers at all already have software with which they are familiar, and that the vast majority of them are not running an open source scripting language on their machines to do their financial analysis.  In fact, I would wager that most of them are using tools like Excel, and if they really need to script anything, its being done with VBA in Excel. Now, Im not proposing that the SEC should require that the data be provided in Excel format with VBA scripts included so everyone can easily access the data (despite the fact that this would actually be pretty useful generally).  Rather, I think it is ill-advised for a government agency to make recommendations of this nature, period.  If the goal of the recommendation is to ensure that the way things work is codified in a transparent manner, than I can certainly respect that.  It seems to me that this could be accomplished without dictating the technology to use.  To wit: An Excel document could contain all of the data as well as the formulae necessary, and most likely would not require the end-user to install anything on their machine The SEC could simply create a calculator in the cloud such that any/all investors could use a single canonical web-based (or web service based) tool Millions of Java and .NET developers could write their own implementations You can read more about this issue, including the favorable position on it, on Jayanth Varmas blog. Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• How do I use XML prefixes in C#?

  - by Andrew Mock

  EDIT: I have now published my app: http://pastebin.com/PYAxaTHU I was trying to make console-based application that returns my temperature. using System; using System.Xml; namespace GetTemp { class Program { static void Main(string[] args) { XmlDocument doc = new XmlDocument(); doc.LoadXml(downloadWebPage( "http://www.andrewmock.com/uploads/example.xml" )); XmlNamespaceManager man = new XmlNamespaceManager(doc.NameTable); man.AddNamespace("aws", "www.aws.com/aws"); XmlNode weather = doc.SelectSingleNode("aws:weather", man); Console.WriteLine(weather.InnerText); Console.ReadKey(false); } } } Here is the sample XML: <aws:weather xmlns:aws="http://www.aws.com/aws"> <aws:api version="2.0"/> <aws:WebURL>http://weather.weatherbug.com/WA/Kenmore-weather.html?ZCode=Z5546&Units=0&stat=BOTHL</aws:WebURL> <aws:InputLocationURL>http://weather.weatherbug.com/WA/Kenmore-weather.html?ZCode=Z5546&Units=0</aws:InputLocationURL> <aws:station requestedID="BOTHL" id="BOTHL" name="Moorlands ES" city="Kenmore" state=" WA" zipcode="98028" country="USA" latitude="47.7383346557617" longitude="-122.230278015137"/> <aws:current-condition icon="http://deskwx.weatherbug.com/images/Forecast/icons/cond024.gif">Mostly Cloudy</aws:current-condition> <aws:temp units="&deg;F">40.2</aws:temp> <aws:rain-today units=""">0</aws:rain-today> <aws:wind-speed units="mph">0</aws:wind-speed> <aws:wind-direction>WNW</aws:wind-direction> <aws:gust-speed units="mph">5</aws:gust-speed> <aws:gust-direction>NW</aws:gust-direction> </aws:weather> I'm just not sure how to use XML prefixes correctly here. What is wrong with this?

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• Scalable / Parallel Large Graph Analysis Library?

  - by Joel Hoff

  I am looking for good recommendations for scalable and/or parallel large graph analysis libraries in various languages. The problems I am working on involve significant computational analysis of graphs/networks with 1-100 million nodes and 10 million to 1+ billion edges. The largest SMP computer I am using has 256 GB memory, but I also have access to an HPC cluster with 1000 cores, 2 TB aggregate memory, and MPI for communication. I am primarily looking for scalable, high-performance graph libraries that could be used in either single or multi-threaded scenarios, but parallel analysis libraries based on MPI or a similar protocol for communication and/or distributed memory are also of interest for high-end problems. Target programming languages include C++, C, Java, and Python. My research to-date has come up with the following possible solutions for these languages: C++ -- The most viable solutions appear to be the Boost Graph Library and Parallel Boost Graph Library. I have looked briefly at MTGL, but it is currently slanted more toward massively multithreaded hardware architectures like the Cray XMT. C - igraph and SNAP (Small-world Network Analysis and Partitioning); latter uses OpenMP for parallelism on SMP systems. Java - I have found no parallel libraries here yet, but JGraphT and perhaps JUNG are leading contenders in the non-parallel space. Python - igraph and NetworkX look like the most solid options, though neither is parallel. There used to be Python bindings for BGL, but these are now unsupported; last release in 2005 looks stale now. Other topics here on SO that I've looked at have discussed graph libraries in C++, Java, Python, and other languages. However, none of these topics focused significantly on scalability. Does anyone have recommendations they can offer based on experience with any of the above or other library packages when applied to large graph analysis problems? Performance, scalability, and code stability/maturity are my primary concerns. Most of the specialized algorithms will be developed by my team with the exception of any graph-oriented parallel communication or distributed memory frameworks (where the graph state is distributed across a cluster).

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• Bibliography behaves strange in lyx.

  - by Orjanp

  Hi! I have created a Bibliography section in my document written in lyx. It uses a book layout. For some reason it did start over again when I added some more entries. The new entries was made some time later than the first ones. I just went down to key-27 and hit enter. Then it started on key-1 again. Does anyone know why it behaves like this? The lyx code is below. \begin{thebibliography}{34} \bibitem{key-6}Lego mindstorms, http://mindstorms.lego.com/en-us/default.aspx \bibitem{key-7}C.A.R. Hoare. Communicating sequential processes. Communications of the ACM, 21(8):666-677, pages 666\textendash{}677, August 1978. \bibitem{key-8}C.A.R. Hoare. Communicating sequential processes. Prentice-Hall, 1985. \bibitem{key-9}CSPBuilder, http://code.google.com/p/cspbuilder/ \bibitem{key-10}Rune Møllegård Friborg and Brian Vinter. CSPBuilder - CSP baset Scientific Workflow Modelling, 2008. \bibitem{key-11}Labview, http://www.ni.com/labview \bibitem{key-12}Robolab, http://www.lego.com/eng/education/mindstorms/home.asp?pagename=robolab \bibitem{key-13}http://code.google.com/p/pycsp/ \bibitem{key-14}Paparazzi, http://paparazzi.enac.fr \bibitem{key-15}Debian, http://www.debian.org \bibitem{key-16}Ubuntu, http://www.ubuntu.com \bibitem{key-17}GNU, http://www.gnu.org \bibitem{key-18}IVY, http://www2.tls.cena.fr/products/ivy/ \bibitem{key-19}Tkinter, http://wiki.python.org/moin/TkInter \bibitem{key-20}pyGKT, http://www.pygtk.org/ \bibitem{key-21}pyQT4, http://wiki.python.org/moin/PyQt4 \bibitem{key-22}wxWidgets, http://www.wxwidgets.org/ \bibitem{key-23}wxPython GUI toolkit, http://www.wxPython.org \bibitem{key-24}Python programming language, http://www.python.org \bibitem{key-25}wxGlade, http://wxglade.sourceforge.net/ \bibitem{key-26}http://numpy.scipy.org/ \bibitem{key-27}http://www.w3.org/XML/ \bibitem{key-1}IVY software bus, http://www2.tls.cena.fr/products/ivy/ \bibitem{key-2}sdas \bibitem{key-3}sad \bibitem{key-4}sad \bibitem{key-5}fsa \bibitem{key-6}sad \bibitem{key-7} \end{thebibliography}

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• How to thoroughly purge and reinstall postgresql on ubuntu?

  - by John Mee

  Somehow I've managed to completely bugger the install of postgresql on Ubuntu karmic. I want to start over from scratch, but when I "purge" the package with apt-get it still leaves traces behind such that the reinstall configuration doesn't run properly. After I've done: apt-get purge postgresql apt-get install postgresql It said Setting up postgresql-8.4 (8.4.3-0ubuntu9.10.1) ... Configuring already existing cluster (configuration: /etc/postgresql/8.4/main, data: /var/lib/postgresql/8.4/main, owner: 108:112) Error: move_conffile: required configuration file /var/lib/postgresql/8.4/main/postgresql.conf does not exist Error: could not create default cluster. Please create it manually with pg_createcluster 8.4 main --start or a similar command (see 'man pg_createcluster'). update-alternatives: using /usr/share/postgresql/8.4/man/man1/postmaster.1.gz to provide /usr/share/man/man1/postmaster.1.gz (postmaster.1.gz) in auto mode. Setting up postgresql (8.4.3-0ubuntu9.10.1) ... I have a "/etc/postgresql" with nothing in it and "/etc/postgresql-common/" has a 'pg_upgradecluser.d' directory and root.crt and user_clusters files. The /etc/passwd has a postgres user; the purge script doesn't appear to touch it. There's been a bunch of symptoms which I work through only to expose the next. Right this second, when I run that command "pg_createcluster..." it complains that '/var/lib/postgresql/8.4/main/postgresql.conf does not exist', so I'll go find one of those but I'm sure that won't be the end of it. Is there not some easy one-liner (or two) which will burn it completely and let me start over?

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• Tal condition always evaluates to false

  - by Ander2

  I'm using plone and trying to display a form result in a page template. I'm trying to filter some database results using tal:condition with a python expression but it always evaluates to false. The code looks like this: <tr tal:repeat="result view/results"> <td> <span tal:condition="python:view.teams[0]==result.team_id" tal:replace="result/position">Position</span></td> <td> <span tal:condition="python:view.teams[1]==result.team_id" tal:replace="result/position">Position</span></td> </tr> I want the table cells to be filled with the team position when the team id is matched in the result, but the cells always are empty. If I remove the tal:condition from the span and replace the tal:replace="result/position" with tal:replace=python:view.teams[0]==result.team_id it prints True or False so I can check that the result is correct. Can anyone help me about this issue? Why does tal:condition allways evaluate false?

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• Django: DatabaseLockError exception with Djapian

  - by jul

  Hi, I've got the exception shown below when executing indexer.update(). I have no idea about what to do: it used to work and now index database seems "locked". Anybody can help? Thanks Environment: Request Method: POST Request URL: http://piem.org:8000/restaurant/add/ Django Version: 1.1.1 Python Version: 2.5.2 Installed Applications: ['django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.comments', 'django.contrib.sites', 'django.contrib.admin', 'registration', 'djapian', 'resto', 'multilingual'] Installed Middleware: ('django.middleware.common.CommonMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.middleware.locale.LocaleMiddleware', 'multilingual.middleware.DefaultLanguageMiddleware') Traceback: File "/var/lib/python-support/python2.5/django/core/handlers/base.py" in get_response 92. response = callback(request, *callback_args, **callback_kwargs) File "/home/jul/atable/../atable/resto/views.py" in addRestaurant 639. Restaurant.indexer.update() File "/home/jul/python-modules/Djapian-2.3.1-py2.5.egg/djapian/indexer.py" in update 181. database = self._db.open(write=True) File "/home/jul/python-modules/Djapian-2.3.1-py2.5.egg/djapian/database.py" in open 20. xapian.DB_CREATE_OR_OPEN, File "/usr/lib/python2.5/site-packages/xapian.py" in __init__ 2804. _xapian.WritableDatabase_swiginit(self,_xapian.new_WritableDatabase(*args)) Exception Type: DatabaseLockError at /restaurant/add/ Exception Value: Unable to acquire database write lock on /home/jul/atable /djapian_spaces/resto/restaurant/resto.index.restaurantindexer: already locked

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