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• F# Objects &ndash; Integrating with the other .Net Languages &ndash; Part 1

  - by MarkPearl

  In the next few blog posts I am going to explore objects in F#. Up to now, my dabbling in F# has really been a few liners and while I haven’t reached the point where F# is my language of preference – I am already seeing the benefits of the language when solving certain types of programming problems. For me I believe that the F# language will be used in a silo like architecture and that the real benefit of having F# under your belt is so that you can solve problems that F# lends itself towards and then interact with other .Net languages in doing the rest. When I was still very new to the F# language I did the following post covering how to get F# & C# to talk to each other. Today I am going to use a similar approach to demonstrate the structure of F# objects when inter-operating with other languages. Lets start with an empty F# class … type Person() = class end   Very simple, and all we really have done is declared an object that has nothing in it. We could if we wanted to make an object that takes a constructor with parameters… the code for this would look something like this… type Person =     {         Firstname : string         Lastname : string     }   What’s interesting about this syntax is when you try and interop with this object from another .Net language like C# - you would see the following…   Not only has a constructor been created that accepts two parameters, but Firstname and Lastname are also exposed on the object. Now it’s important to keep in mind that value holders in F# are immutable by default, so you would not be able to change the value of Firstname after the construction of the object – in C# terms it has been set to readonly. One could however explicitly state that the value holders were mutable, which would then allow you to change the values after the actual creation of the object. type Person = { mutable Firstname : string mutable Lastname : string }   Something that bugged me for a while was what if I wanted to have an F# object that requires values in its constructor, but does not expose them as part of the object. After bashing my head for a few moments I came up with the following syntax – which achieves this result. type Person(Firstname : string, Lastname : string) = member v.Fullname = Firstname + " " + Lastname What I haven’t figured out yet is what is the difference between the () & {} brackets when declaring an object.

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• Becoming an Expert MySQL DBA Across Five Continents

  - by Antoinette O'Sullivan

  You can take Oracle's MySQL Database Administrator training on five contents. In this 5-day, live, instructor-led course, you learn to install and optimize the MySQL Server, set up replication and security, perform database backups and performance tuning, and protect MySQL databases. Below is a selection of the in-class events already on the schedule for the MySQL for Database Administrators course. AFRICA  Location  Date  Delivery Language  Nairobi, Kenya  22 July 2013  English  Johannesburg, South Africa  9 December 2013  English AMERICA  Location  Date  Delivery Language  Belmont, California, United States  22 July 2013  English ASIA  Location  Date  Delivery Language  Dehradun, India  11 July 2013  English  Grogol - Jakarta Barat, Indonesia  16 September 2013  English  Makati City, Philippines  5 August 2013  English  Pasig City, Philippines  12 August 2013  English  Istanbul, Turkey  12 August 2013  Turkish AUSTRALIA and OCEANIA  Location  Date  Delivery Language  Sydney, Australia  15 July 2013  English  Auckland, New Zealand  5 August 2013  English  Wellington, New Zealand  15 July 2013  English EUROPE  Location  Date  Delivery Language  London, England  9 September 2013  English  Aix-en-Provence, France  2 December 2013  French  Bordeaux Merignac, France  2 December 2013  French  Puteaux, France  16 September 2013  French  Dresden, Germany  26 August 2013  German  Hamburg, Germany  16 November 2013  German  Munich, Germany  19 August 2013  German  Munster, Germany  9 September 2013  German  Budapest, Hungary  4 November 2013  Hungarian  Belfast, Ireland  16 December 2013  English  Milan, Italy  7 October 2013  Italian  Rome, Italy  16 September 2013  Italian  Utrecht, Netherlands  16 September 2013  English  Warsaw, Poland 5 August 2013  Polish   Lisbon, Portugal  16 September 2013 European Portugese   Barcelona, Spain 30 October 2013  Spanish   Madrid, Spain 4 November 2013  Spanish   Bern, Switzerland  27 November 2013  German  Zurich, Switzerland  27 November 2013  German You can also take this course from your own desk as a live-virtual class, choosing from a wide selection of events already on the schedule suiting different timezones. To register for this course or to learn more about the authentic MySQL curriculum, go to http://oracle.com/education/mysql.

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• Was I wrong about JavaScript?

  - by jboyer

  Yes, I was. Recently, I’ve taken a good hard look at JavaScript. I’ve used it before but mostly in the capacity of web design. Using JQuery to make your web page do cool stuff is different than really creating a JavaScript application using all of the language constructs. What I’m finding as I use it more is that I may have been wrong about my assumptions about it. Let me explain.   I enjoyed doing cool stuff with JQuery but the limited experience with JavaScript as a language coupled with the bad things that I heard about it led me to not have any real interest in it. However, JavaScript is ubiquitous on the web and if I want to do any web development, which I do, I need to learn it. So here I am, diving deep into the language with the help of the JavaScript Fundamentals training course at Pluralsight (great training for a low price) and the JavaScript: The Good Parts book by Douglas Crockford.   Now, there are certainly parts of JavaScript that are bad. I think these are well known by any developer that uses it. The parts that I feel are especially egregious are the following: The global object null vs. undefined truthy and falsy limited (nearly nonexistent) scoping ‘==’ and ‘===’ (I just don’t get the reason for coercion)   However, what I am finding hiding under the covers of the bad things is a good language. I am finding that I am legitimately enjoying JavaScript. This I was not expecting. I’m not going to go into a huge dissertation on what I like about it, but some things include: Object literal notation dynamic typing functional style (JavaScript: The Good Parts describes it as LISP in C clothing) JSON (better than XML) There are parts of JavaScript that seem strange to OOP developers like myself. However, just because it is different or seems strange does not mean it is bad. Some differences are quite interesting and useful.   I feel that it is important for developers to challenge their assumptions and also to be able to admit when they are wrong on a topic. Many different situations can arise that lead to this, such as choosing the wrong technology for a problem’s solution, misunderstanding the requirements, etc. I decided to challenge my assumptions about JavaScript instead of moving straight into CoffeeScript or Dart. After exploring it, I find that I am beginning to enjoy it the more I use it. As long as there are those like Crockford to help guide me in the right way to code in JavaScript, I can create elegant and efficient solutions to problems and add another ‘arrow’ to the ‘quiver’, so to speak. I do still intend to learn CoffeeScript to see what the hub-bub is about, but now I no longer have to be afraid of JavaScript as a legitimate programming language.   Has something similar ever happened to you? Tell me about it in the comments below.

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• Why would I learn C++11, having known C and C++?

  - by Shahbaz

  I am a programmer in C and C++, although I don't stick to either language and write a mixture of the two. Sometimes having code in classes, possibly with operator overloading, or templates and the oh so great STL is obviously a better way. Sometimes use of a simple C function pointer is much much more readable and clear. So I find beauty and practicality in both languages. I don't want to get into the discussion of "If you mix them and compile with a C++ compiler, it's not a mix anymore, it's all C++" I think we all understand what I mean by mixing them. Also, I don't want to talk about C vs C++, this question is all about C++11. C++11 introduces what I think are significant changes to how C++ works, but it has introduced many special cases that change how different features behave in different circumstances, placing restrictions on multiple inheritance, adding lambda functions, etc. I know that at some point in the future, when you say C++ everyone would assume C++11. Much like when you say C nowadays, you most probably mean C99. That makes me consider learning C++11. After all, if I want to continue writing code in C++, I may at some point need to start using those features simply because my colleagues have. Take C for example. After so many years, there are still many people learning and writing code in C. Why? Because the language is good. What good means is that, it follows many of the rules to create a good programming language. So besides being powerful (which easy or hard, almost all programming languages are), C is regular and has few exceptions, if any. C++11 however, I don't think so. I'm not sure that the changes introduced in C++11 are making the language better. So the question is: Why would I learn C++11? Update: My original question in short was: "I like C++, but the new C++11 doesn't look good because of this and this and this. However, deep down something tells me I need to learn it. So, I asked this question here so that someone would help convince me to learn it." However, the zealous people here can't tolerate pointing out a flaw in their language and were not at all constructive in this manner. After the moderator edited the question, it became more like a "So, how about this new C++11?" which was not at all my question. Therefore, in a day or too I am going to delete this question if no one comes up with an actual convincing argument. P.S. If you are interested in knowing what flaws I was talking about, you can edit my question and see the previous edits.

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• Career advice: stay with PHP or start a new career in something else ( .Net?)

  - by Christian P

  I'm planning on moving to NY in 6-12 months tops, so I'm forced to find a new job. When I'm planing to start my life in another city it's also probably a good time to think about career changes. I've found a lot of different opinions about PHP vs .Net vs Java and this is not topic here. I don't want to start a new fight about which language is better. Knowing programming language is not the most important thing for being a software developer. To be a really good developer you need to know OOP, design patterns, testing... and language is just a tool to make things happen. So back to my question. I have mixed experience in IT - 1 year as an IT support guy (Windows administration and support), around 2 years of experience in embedded programming (VB.Net 2005) and for the last 2 years I'm working with PHP/MySQL. I have worked with Magento web shop, assisted in some projects in Symfony, modified few Drupal sites. My main concerns are following: Do I continue to improve my skills in PHP e.g. to start learning some major PHP framework like Zend, Symfony maybe get some PHP certification. Or do I start learning .NET or Java. I'm more familiar to .NET so I'll probably choose it if choice falls between .NET and Java ( or you could convince me to choose Java :). Career-wise, I don't know what is the best choice. Learning new framework and language is more time consuming then improving my existing skills in PHP. But with .NET you have a lot of possibilities (Windows 7 Phone development, Silverlight, WPF) and possibly bigger chances to find better jobs. PHP jobs are less payed then .NET, at least, according to my researches (correct me if I'm wrong). But if I start now with .NET I'm just a beginner and my salary will be low. I need at least 2+ years of experience in some language to even try to find some job that is paying higher than $50-60k in NY. My main goal in next 2-3 years is to try to find a job in a $60-80k category. Don't get me wrong, I'm not just chasing money, but money is an important factor when you're trying to start a family. I'm 27 years old and I feel that there isn't a lot of room for wrong decisions regarding my career, so any advice will be very welcome. Update Thank you all for spending time to help me with my problem. All of the answers and comments have been very helpful. I have decided to stick with PHP but also to learn C# and Silverlight 4. We'll see where the life will take me.

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• How mod_cache working with "must-revalidate" and "max-age"?

  - by Dmitriy Sosunov

  Quick question before I will explain my flow: ?an mod_cache perform revalidate with if-none-match only if max-age is expired in case if it configured in reverse proxy mode? My goal is to reduce a number of revalidation requests to our the origin server. For instance: The first request goes to the origin server and then mod_cache save a response in to the cache according to header cache-control: max-age. And only when max-age is expired then mod_cache will revalidate with if-none-match. Currently, mod_cache revalidate each request, regardless that max-age is defined or not. My configuration of Apache 2.4.3 (Windows), on linux I see the same behavior that I will show below. ServerName proxy.lo ProxyRequests Off ProxyPreserveHost Off Header set Vary "Accept, Content-Type, Content-Encoding, Accept-Language" RequestHeader set X-Forwarded-Proto "http" # modify header for user agent's Header set Cache-Control "private, no-cache, no-store, no-transform" CacheQuickHandler off CacheDefaultExpire 300 # the origin server do not provide last-modified CacheIgnoreNoLastMod On CacheIgnoreCacheControl On # the origin server define cache-control: private, no-store only for user agents # Therefore, I would like ignore those headers on the proxy server. CacheStorePrivate On CacheStoreNoStore On CacheEnable disk / CacheRoot "C:/Apache.Cache" CacheDirLevels 5 CacheDirLength 4 CacheMinExpire 15 CacheDetailHeader on CacheHeader on KeepAlive Off ProxyPass / http://origin.lo/ ProxyPassReverse / http://origin.lo/ Also, I have turned on debug log level to see how mod_cache handles a content for caching: I provided this to show that mod_proxy always decides that a content isn't fresh. Why?I provided this to show that mod_proxy always decide that a content isn't fresh. Why? max-age was provided (see below). [Sun Nov 04 11:58:42.899890 2012] [cache:debug] [pid 6492:tid 1400] cache_storage.c(624): [client 192.168.1.100:63741] AH00698: cache: Key for entity /testpage?(null) is http://proxy.lo/testpage? [Sun Nov 04 11:58:42.899890 2012] [cache_disk:debug] [pid 6492:tid 1400] mod_cache_disk.c(569): [client 192.168.1.100:63741] AH00709: Recalled cached URL info header http://proxy.lo/testpage? [Sun Nov 04 11:58:42.899890 2012] [cache_disk:debug] [pid 6492:tid 1400] mod_cache_disk.c(865): [client 192.168.1.100:63741] AH00720: Recalled headers for URL http://proxy.lo/testpage? [Sun Nov 04 11:58:42.899890 2012] [cache:debug] [pid 6492:tid 1400] cache_storage.c(320): [client 192.168.1.100:63741] AH00695: Cached response for /testpage isn't fresh. Adding/replacing conditional request headers. [Sun Nov 04 11:58:42.899890 2012] [cache:debug] [pid 6492:tid 1400] mod_cache.c(414): [client 192.168.1.100:63741] AH00757: Adding CACHE_SAVE filter for /testpage [Sun Nov 04 11:58:42.899890 2012] [cache:debug] [pid 6492:tid 1400] mod_cache.c(448): [client 192.168.1.100:63741] AH00759: Adding CACHE_REMOVE_URL filter for /testpage [Sun Nov 04 11:58:42.899890 2012] [proxy:debug] [pid 6492:tid 1400] mod_proxy.c(1068): [client 192.168.1.100:63741] AH01143: Running scheme http handler (attempt 0) [Sun Nov 04 11:58:42.899890 2012] [proxy:debug] [pid 6492:tid 1400] proxy_util.c(1976): AH00942: HTTP: has acquired connection for (origin.lo) [Sun Nov 04 11:58:42.899890 2012] [proxy:debug] [pid 6492:tid 1400] proxy_util.c(2029): [client 192.168.1.100:63741] AH00944: connecting http://origin.lo/testpage to origin.lo:80 [Sun Nov 04 11:58:42.901890 2012] [proxy:debug] [pid 6492:tid 1400] proxy_util.c(2151): [client 192.168.1.100:63741] AH00947: connected /testpage to origin.lo:80 [Sun Nov 04 11:58:42.901890 2012] [proxy:debug] [pid 6492:tid 1400] proxy_util.c(2554): AH00962: HTTP: connection complete to 192.168.1.100:80 (origin.lo) [Sun Nov 04 11:58:42.903890 2012] [proxy:debug] [pid 6492:tid 1400] proxy_util.c(1991): AH00943: http: has released connection for (origin.lo) [Sun Nov 04 11:58:42.903890 2012] [headers:debug] [pid 6492:tid 1400] mod_headers.c(800): AH01502: headers: ap_headers_output_filter() [Sun Nov 04 11:58:42.903890 2012] [cache:debug] [pid 6492:tid 1400] mod_cache.c(1190): [client 192.168.1.100:63741] AH00769: cache: Caching url: /testpage [Sun Nov 04 11:58:42.903890 2012] [cache:debug] [pid 6492:tid 1400] mod_cache.c(1196): [client 192.168.1.100:63741] AH00770: cache: Removing CACHE_REMOVE_URL filter. [Sun Nov 04 11:58:42.904890 2012] [cache_disk:debug] [pid 6492:tid 1400] mod_cache_disk.c(1318): [client 192.168.1.100:63741] AH00737: commit_entity: Headers and body for URL http://proxy.lo/testpage? cached. The first request to the origin server without mod_proxy to http://origin.lo/ GET http://origin.lo/testpage HTTP/1.1 Host: origin.lo Connection: keep-alive User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.4 (KHTML, like Gecko) Chrome/22.0.1229.94 Safari/537.4 Accept: application/json Accept-Encoding: gzip,deflate,sdch Accept-Language: en-US,en;q=0.8 Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3 The first response from the origin without mod_proxy HTTP/1.1 200 OK Cache-Control: must-revalidate, proxy-revalidate, max-age=30 Content-Type: application/json; charset=utf-8 ETag: "7cf651e2-176f-4ac1-808e-0e0c17cfd0a2" Server: Microsoft-IIS/7.5 X-AspNet-Version: 4.0.30319 X-Powered-By: ASP.NET Date: Sun, 04 Nov 2012 10:11:01 GMT Content-Length: 1877 So, I assumed that revalidation must be occur only in 30 seconds after the success response. Is't right? Let's check it:) Within 30 sec, the Google Chrome didn't perform any requests to the origin server to revalidate a request and has return the response from local cache. When max-age is expired, the Google Chrome perform a request to revalidate: GET http://origin.lo/testpage HTTP/1.1 Host: origin.lo Connection: keep-alive Cache-Control: max-age=0 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.4 (KHTML, like Gecko) Chrome/22.0.1229.94 Safari/537.4 Accept: application/xml If-None-Match: "7cf651e2-176f-4ac1-808e-0e0c17cfd0a2" Accept-Encoding: gzip,deflate,sdch Accept-Language: en-US,en;q=0.8 Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3 and response: HTTP/1.1 304 Not Modified Cache-Control: must-revalidate, proxy-revalidate, max-age=30 ETag: "7cf651e2-176f-4ac1-808e-0e0c17cfd0a2" Server: Microsoft-IIS/7.5 X-AspNet-Version: 4.0.30319 X-Powered-By: ASP.NET Date: Sun, 04 Nov 2012 10:16:20 GMT As you can see, all works as expected. User agent revalidates request only when max-age is expired. Let's now try perform the folling flow though mod_proxy (see configuration above). The first request: GET http://proxy.lo/testpage HTTP/1.1 Host: proxy.lo Connection: keep-alive User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.4 (KHTML, like Gecko) Chrome/22.0.1229.94 Safari/537.4 Accept: application/json Accept-Encoding: gzip,deflate,sdch Accept-Language: en-US,en;q=0.8 Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3 and the response was: HTTP/1.1 200 OK Date: Sun, 04 Nov 2012 10:23:36 GMT Server: Apache Cache-Control: private, no-cache, no-store, no-transform Content-Type: application/json; charset=utf-8 ETag: "7cf651e2-176f-4ac1-808e-0e0c17cfd0a2" Content-Length: 1932 Vary: Accept,Content-Type,Content-Encoding,Accept-Language X-Cache: MISS from proxy.lo X-Cache-Detail: "cache miss: attempting entity save" from proxy.lo Connection: close Ok, let's see to the disk cache and try to see how request and response was stored. (I cut binary data) http://proxy.lo/testpage? Cache-Control: private, no-cache, no-store, no-transform Content-Type: application/json; charset=utf-8 ETag: "7cf651e2-176f-4ac1-808e-0e0c17cfd0a2" Date: Sun, 04 Nov 2012 10:27:15 GMT Content-Length: 1932 Vary: Accept, Content-Type, Content-Encoding, Accept-Language Host: proxy.lo User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.4 (KHTML, like Gecko) Chrome/22.0.1229.94 Safari/537.4 Accept: application/json Accept-Encoding: gzip,deflate,sdch Accept-Language: en-US,en;q=0.8 Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3 X-Forwarded-Proto: http Cache-Control: max-age=300, must-revalidate X-Forwarded-For: 192.168.1.100 X-Forwarded-Host: proxy.lo X-Forwarded-Server: origin.lo Ok, what we see? We see that the first request was performed with max-age=300 & must-revalidate Ok, looks good, as for me, lets perform the next call: GET http://proxy.lo/testpage HTTP/1.1 Host: proxy.lo Connection: keep-alive User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.4 (KHTML, like Gecko) Chrome/22.0.1229.94 Safari/537.4 Accept: application/json Accept-Encoding: gzip,deflate,sdch Accept-Language: en-US,en;q=0.8 Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3 and the second response from mod_proxy: HTTP/1.1 200 OK Date: Sun, 04 Nov 2012 10:31:58 GMT Server: Apache Cache-Control: private, no-cache, no-store, no-transform ETag: "7cf651e2-176f-4ac1-808e-0e0c17cfd0a2" Content-Length: 1932 Vary: Accept,Content-Type,Content-Encoding,Accept-Language X-Cache: REVALIDATE from proxy.lo X-Cache-Detail: "conditional cache hit: entity refreshed" from proxy.lo Connection: close Content-Type: application/json; charset=utf-8 SO, MY QUESTION IS: WHY mod_proxy perform revalidation on each request regardless that max-age is defined? N.B. Apache 2.4.3 Thanks, I would be grateful for any help.

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• reset locale in debian under Squeeze

  - by si2w

  I have problems with locale in debian. I tried many thing but it doesn't anything for me : locale -a locale: Cannot set LC_CTYPE to default locale: No such file or directory C POSIX en_US.utf8 I try to set en_US.utf8 without success with this :dpkg-reconfigure locales -plow perl: warning: Setting locale failed. perl: warning: Please check that your locale settings: LANGUAGE = "en_US", LC_ALL = (unset), LC_CTYPE = "UTF-8", LANG = (unset) are supported and installed on your system. perl: warning: Falling back to the standard locale ("C"). locale: Cannot set LC_CTYPE to default locale: No such file or directory locale: Cannot set LC_ALL to default locale: No such file or directory /usr/bin/locale: Cannot set LC_CTYPE to default locale: No such file or directory /usr/bin/locale: Cannot set LC_ALL to default locale: No such file or directory Generating locales (this might take a while)... en_US.UTF-8... done Generation complete. perl: warning: Setting locale failed. perl: warning: Please check that your locale settings: LANGUAGE = "en_US", LC_ALL = (unset), LC_CTYPE = "UTF-8", LANG = (unset) are supported and installed on your system. perl: warning: Falling back to the standard locale ("C"). perl: warning: Setting locale failed. perl: warning: Please check that your locale settings: LANGUAGE = "en_US", LC_ALL = (unset), LC_CTYPE = "UTF-8", LANG = (unset) are supported and installed on your system. perl: warning: Falling back to the standard locale ("C"). After reboot, i try to use a perl script : perl: warning: Setting locale failed. perl: warning: Please check that your locale settings: LANGUAGE = "en_US", LC_ALL = (unset), LC_CTYPE = "UTF-8", LANG = "en_US.UTF-8" are supported and installed on your system. perl: warning: Falling back to the standard locale ("C"). Here is my /etc/default/locale config file : cat /etc/default/locale LANG=en_US.UTF-8 LANGUAGE=en_US Any idea to solve this (stupid) problem ? Thanks

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• Help on using mod_rewrite to serve I18N static site

  - by Guandalino

  My static site www.example.com is translated in different languages and files are organized in this hierarchy: / /de index.html seite-1.html /en index.html page-1.html /it index.html pagina-1.html The root contains no files, just one subdirectory for each language the site is translated in, while subdirectories contain pages translated (both content and file name are) in the language corresponding to subdirectory name, de, en, it, etc. The question is: how to configure mod_rewrite so that when a client visits www.example.com it is taken to the correct version of the site, falling back to english version if the required locale is not supported (i.e. Accept-Language header doesn't exist or specifies a language for which the site is not available, e.g. fr)? Thanks for any pointer, I'm here to provide further details or feedback! Best regards

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• Default Keyboard for new users in Windows 7

  - by xited

  I just installed Windows 7 and I want all users signing in to the computer to see the Language Bar customized with the following three languages: "English (American)" "French (Standard)" "Chinese (Simplified PRC)" I am running the following four lines of code at log on in order to change the registry such that each user will see the language bar, and then have access to the three keyboard layouts mentioned above. reg add "HKCU\Software\Microsoft\CTF\LangBar" /v ShowStatus /t REG_DWORD /d 4 /f reg add "HKCU\Keyboard Layout\Preload" /v 2 /d 0000040c reg add "HKCU\Keyboard Layout\Preload" /v 3 /d 00000c0a reg add "HKCU\Keyboard Layout\Preload" /v 4 /d 00000804 The above works fine, but with one small/major inconvenience: the user has to log off and then log back on in order for these changes to take effect and see the language bar, as described above. The question becomes: How can I force these changes to take effect so that users don't have to log off and then log back in to see the language bar. This has to be done automatically when users log in.

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• Can mod-rewrite be used to set environmental variables?

  - by VLostBoy

  Hi, I've got an existing simple rewrite rule like so: <Directory /path> RewriteEngine on RewriteBase / # if the requested resource does not exist RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d # route the uri to a front controller RewriteRule ^(.*)$ index.php/$1 [L] </Directory> This works fine, but I want to do one of either two things. On the basis of detecting the clients accept-language header, I want to either (i) Set the detected language as an environmental variable that the script can use or (ii)Rewrite the request so that the url begins with the language code (e.g. www.example.com/en/some/resource) In terms of implementing (i), I defined this rule: <Directory /path> RewriteEngine on RewriteBase / # if the requested resource does not exist RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d # if the users preferred language is supported... RewriteCond %{HTTP:Accept-Language} ^.*(de|es|fr|it|ja|ru|en).*$ [NC] # define an environmental variable PREFER_LANG RewriteRule ^(.*)$ - [env=PREFER_LANG:%1] # route the uri to a front controller RewriteRule ^(.*)$ index.php/$1 [L] </Directory> I've tried a few variations, but PREFER_LANG is not defined in $_SERVER nor retrievable by getenv. In terms of implementing (ii)... lets just say its messy. I'll post it if I can't get an answer to one. Can anyone advise me? Thanks!

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• Hiding my location to websites with region-specific languages/content

  - by Tudor

  I just went to download Microsoft Secority Essentials and it enraged me as it redirected me to a site in my home language and not the default English. If I go to America, I don't want them to speak Swahili. It reminded me of all the other websites who try to do the same. I don't want my content in greek when I'm on vacation! I for one simply can't work on a computer unless the language is English (or unless there's a VERY good reason to change the language). Location aware content is only good for download mirrors, and even then I would rather pick from a list of countries myself. (or if you can't speak anything but your own language) I know websites get your location from your IP and ISP, but is there any way you can inhibit this behaviour on a browser level? Is there any Chrome/Firefox extension for it? Do I really have no choice but to hide my IP? There's all sorts of services that claim they're hiding your IP for free so that people can't log and trace your steps through the internet, but they're probably logging it themselves and making money off it. Why else would they be free? I've found that Firefox has an Option that says "Choose your preferred language when displaying pages". Haven't found anything for Chrome.

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• Data munging and data import scripting

  - by morpheous

  I need to write some scripts to carry out some tasks on my server (running Ubuntu server 8.04 TLS). The tasks are to be run periodically, so I will be running the scripts as cron jobs. I have divided the tasks into "group A" and "group B" - because (in my mind at least), they are a bit different. Task Group A import data from a file and possibly reformat it - by reformatting, I mean doing things like santizing the data, possibly normalizing it and or running calculations on 'columns' of the data Import the munged data into a database. For now, I am mostly using mySQL for the vast majority of imports - although some files will be imported into a sqlLite database. Note: The files will be mostly text files, although some of the files are in a binary format (my own proprietary format, written by a C++ application I developed). Task Group B Extract data from the database Perform calculations on the data and either insert or update tables in the database. My coding experience is is primarily as a C/C++ developer, although I have been using PHP as well for the last 2 years or so. I am from a windows background so I am still finding my feet in the linux environment. My question is this - I need to write scripts to perform the tasks I described above. Although I suppose I could write a few C++ applications to be used in the shell scripts, I think it may be better to write them in a scripting language (maybe this is a flawed assumption?). My thinking is that it would be easier to modify thins in a script - no need to rebuild etc for changes to functionality. Additionally, C++ data munging in C++ tends to involve more lines of code than "natural" scripting languages such as Perl, Python etc. Assuming that the majority of people on here agree that scripting is the way to go, herein lies my dilema. Which scripting language to use to perform the tasks above (giving my background). My gut instinct tells me that Perl (shudder) would be the most obvious choice for performing all of the above tasks. BUT (and that is a big BUT). The mere mention of Perl makes my toes curl, as I had a very, very bag experience with it a while back. The syntax seems quite unnatural to me - despite how many times I have tried to learn it - so if possible, I would really like to give it a miss. PHP (which I already know), also am not sure is a good candidate for scripting on the CLI (I have not seen many examples on how to do this etc - so I may be wrong). The last thing I must mention is that IF I have to learn a new language in order to do this, I cannot afford (time constraint) to spend more than a day, in learning the key commands/features required in order to do this (I can always learn the details of the language later, once I have actually deployed the scripts). So, which scripting language would you recommend (PHP, Python, Perl, [insert your favorite here]) - and most importantly WHY?. Or, should I just stick to writing little C++ applications that I call in a shell script?. Lastly, if you have suggested a scripting language, can you please show with a FEW lines (Perl mongers - I'm looking in your direction [nothing to cryptic!] ;) ) how I can use the language you suggested to do what I want to do. Hopefully, the lines you present will convince me that it can be done easily and elegantly in the language you suggested.

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• SQL SERVER – Find Max Worker Count using DMV – 32 Bit and 64 Bit

  - by pinaldave

  During several recent training courses, I found it very interesting that Worker Thread is not quite known to everyone despite the fact that it is a very important feature. At some point in the discussion, one of the attendees mentioned that we can double the Worker Thread if we double the CPU (add the same number of CPU that we have on current system). The same discussion has triggered this quick article. Here is the DMV which can be used to find out Max Worker Count SELECT max_workers_count FROM sys.dm_os_sys_info Let us run the above query on my system and find the results. As my system is 32 bit and I have two CPU, the Max Worker Count is displayed as 512. To address the previous discussion, adding more CPU does not necessarily double the Worker Count. In fact, the logic behind this simple principle is as follows: For x86 (32-bit) upto 4 logical processors  max worker threads = 256 For x86 (32-bit) more than 4 logical processors  max worker threads = 256 + ((# Procs – 4) * 8) For x64 (64-bit) upto 4 logical processors  max worker threads = 512 For x64 (64-bit) more than 4 logical processors  max worker threads = 512+ ((# Procs – 4) * 8) In addition to this, you can configure the Max Worker Thread by using SSMS. Go to Server Node >> Right Click and Select Property >> Select Process and modify setting under Worker Threads. According to Book On Line, the default Worker Thread settings are appropriate for most of the systems. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: Pinal Dave, SQL, SQL Authority, SQL Query, SQL Scripts, SQL Server, SQL System Table, SQL Tips and Tricks, T SQL, Technology Tagged: SQL DMV

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• How can I learn to effectively write Pythonic code?

  - by Matt Fenwick

  I'm tired of getting downvoted and/or semi-rude comments on my Python answers, saying things like "this isn't Pythonic" or "that's not the Python way of doing things". To clarify, I'm not tired of getting corrected and downvoted, and I'm not tired of being wrong: I'm tired of feeling like there's a whole field of Python that I know nothing about, and seems to be implicit knowledge of experienced Python programmers. Doing a google search for "Pythonic" reveals a wide range of interpretations. The wikipedia page says: A common neologism in the Python community is pythonic, which can have a wide range of meanings related to program style. To say that code is pythonic is to say that it uses Python idioms well, that it is natural or shows fluency in the language. Likewise, to say of an interface or language feature that it is pythonic is to say that it works well with Python idioms, that its use meshes well with the rest of the language. It also discusses the term "unpythonic": In contrast, a mark of unpythonic code is that it attempts to write C++ (or Lisp, Perl, or Java) code in Python—that is, provides a rough transcription rather than an idiomatic translation of forms from another language. The concept of pythonicity is tightly bound to Python's minimalist philosophy of readability and avoiding the "there's more than one way to do it" approach. Unreadable code or incomprehensible idioms are unpythonic. I suspect one way to learn the Pythonic way is just to program in Python a whole bunch. But I bet I could write a bunch of crap and not improve that much without some guidance, whereas a good resource might speed up the learning process significantly. PEP 8 might be exactly what I'm looking for, or maybe not. I'm not sure; on the one hand it covers a lot of ground, but on the other hand, I feel like it's more suited as a reference for knowledgeable programmers than a tutorial for fresh 'uns. How do I get my foot in the Pythonic/Python way of doing things door?

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• Podcast Show Notes: Fear and Loathing in SOA

  - by Bob Rhubart

  The latest program (#47) in the Arch2Arch podcast series is the first of three segments from another virtual mini-meet-up with architects from the OTN community, recorded on March 9, 2010. In keeping with the meet-up format, I sent an invitation to my list of past participants in Arch2Arch panel discussions. The following people showed up to take seats at the virtual table and drive the conversation: Hajo Normann is a SOA architect and consultant at EDS in Frankfurt Blog | LinkedIn | Oracle Mix | Oracle ACE Profile | Books  Jeff Davies is a Senior Product Manager at Oracle, and is the primary author of The Definitive Guide to SOA: Oracle Service Bus Homepage | Blog | LinkedIn | Oracle Mix Pat Shepherd is an enterprise architect with the Oracle Enterprise Solutions Group. Oracle Mix | LinkedIn | Blog This first segment focuses on a discussion of the persistent fear of SOA the panelists have observed among many developers and architects. Listen to Part 1 The discussion continues in next week’s segment with a look at the misinformation and misunderstanding behind the fear of SOA, and a discussion of possible solutions. So stay tuned: RSS   del.icio.us Tags: oracle,otn,arch2arch,podcast,soa,service-oriented architecture,enterprise architecture Technorati Tags: oracle,otn,arch2arch,podcast,soa,service-oriented architecture,enterprise architecture

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• E: Sub-process /usr/bin/dpkg returned an error code (1)

  - by Joel

  I cant install or uppdate anything on my system 12.04 I get the error... installArchives() failed: dpkg: error processing libqt4-xmlpatterns (--configure): libqt4-xmlpatterns:amd64 4:4.8.1-0ubuntu4.2 cannot be configured because libqt4-xmlpatterns:i386 is in a different version (4:4.8.1-0ubuntu4.3) dpkg: error processing libqt4-xmlpatterns:i386 (--configure): libqt4-xmlpatterns:i386 4:4.8.1-0ubuntu4.3 cannot be configured because libqt4-xmlpatterns:amd64 is in a different version (4:4.8.1-0ubuntu4.2) dpkg: dependency problems prevent configuration of libqt4-declarative:i386: libqt4-declarative:i386 depends on libqt4-xmlpatterns (= 4:4.8.1-0ubuntu4.3); however: Package libqt4-xmlpatterns:i386 is not configured yet. dpkg: error processing libqt4-declarative:i386 (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of libqt4-declarative: libqt4-declarative depends on libqt4-xmlpatterns (= 4:4.8.1-0ubuntu4.3); however: Version of libqt4-xmlpatterns on system is 4:4.8.1-0ubuntu4.2. dpkg: error processing libqt4-declarative (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of libqtgui4:i386: libqtgui4:i386 depends on libqt4-declarative (= 4:4.8.1-0ubuntu4.3); however: Package libqt4-declarative:i386 is not configured yet. dpkg: error processing libqtgui4:i386 (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of libqtgui4: No apport report written because the error message indicates its a followup error from a previous failure. No apport report written because the error message indicates its a followup error from a previous failure. No apport report written because MaxReports is reached already No apport report written because MaxReports is reached already No apport report written because MaxReports is reached already No apport report written because MaxReports is reached already libqtgui4 depends on libqt4-declarative (= 4:4.8.1-0ubuntu4.3); however: Package libqt4-declarative is not configured yet. dpkg: error processing libqtgui4 (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of libqt4-designer: libqt4-designer depends on libqtgui4 (= 4:4.8.1-0ubuntu4.3); however: Package libqtgui4 is not configured yet. dpkg: error processing libqt4-designer (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of libqt4-designer:i386: libqt4-designer:i386 depends on libqtgui4 (= 4:4.8.1-0ubuntu4.3); however: Package libqtgui4:i386 is not configured yet. dpkg: error processing libqt4-designer:i386 (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of libqt4-opengl: libqt4-opengl depends on libqtgui4 (= 4:4.8.1-0ubuntu4.3); however: Package libqtgui4 is not configured yet. dpkg: error processing libqt4-opengl (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of libqt4-opengl:i386: libqt4-opengl:i386 depends on libqtgui4 (= 4:4.8.1-0ubuntu4.3); however: Package libqtgui4:i386 is not configured yet. dpkg: error processing libqt4-opengl:i386 (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of libqt4-qt3support: libqt4-qt3support depends on libqt4-designer (= 4:4.8.1-0ubuntu4.3); however: Package libqt4-designer is not configured yet. libqt4-qt3support depends on libqtgui4 (= 4:4.8.1-0ubuntu4.3); however: Package libqtgui4 is not configured yet. dpkg: error processing libqt4-qt3support (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of libqt4-qt3support:i386: libqt4-qt3support:i386 depends on libqt4-designer (= 4:4.8.1-0ubuntu4.3); however: Package libqt4-designer:i386 is not configured yet. libqt4-qt3support:i386 depends on libqtgui4 (= 4:4.8.1-0ubuntu4.3); however: Package libqtgui4:i386 is not configured yet. dpkg: error processing libqt4-qt3support:i386 (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of libqt4-scripttools:i386: libqt4-scripttools:i386 depends on libqtgui4 (= 4:4.8.1-0ubuntu4.3); however: Package libqtgui4:i386 is not configured yet. dpkg: error processing libqt4-scripttools:i386 (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of libqt4-svg: libqt4-svg depends on libqtgui4 (= 4:4.8.1-0ubuntu4.3); however: Package libqtgui4 is not configured yet. dpkg: error processing libqt4-svg (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of libqt4-svg:i386: libqt4-svg:i386 depends on libqtgui4 (= 4:4.8.1-0ubuntu4.3); however: Package libqtgui4:i386 is not configured yet. dpkg: error processing libqt4-svg:i386 (--configure): dependency problems - leaving unconfigured Errors were encountered while processing: libqt4-xmlpatterns libqt4-xmlpatterns:i386 libqt4-declarative:i386 libqt4-declarative libqtgui4:i386 libqtgui4 libqt4-designer libqt4-designer:i386 libqt4-opengl libqt4-opengl:i386 libqt4-qt3support libqt4-qt3support:i386 libqt4-scripttools:i386 libqt4-svg libqt4-svg:i386 Error in function: dpkg: dependency problems prevent configuration of libqt4-declarative: libqt4-declarative depends on libqt4-xmlpatterns (= 4:4.8.1-0ubuntu4.3); however: Version of libqt4-xmlpatterns on system is 4:4.8.1-0ubuntu4.2. dpkg: error processing libqt4-declarative (--configure): dependency problems - leaving unconfigured dpkg: error processing libqt4-xmlpatterns (--configure): libqt4-xmlpatterns:amd64 4:4.8.1-0ubuntu4.2 cannot be configured because libqt4-xmlpatterns:i386 is in a different version (4:4.8.1-0ubuntu4.3) dpkg: error processing libqt4-xmlpatterns:i386 (--configure): libqt4-xmlpatterns:i386 4:4.8.1-0ubuntu4.3 cannot be configured because libqt4-xmlpatterns:amd64 is in a different version (4:4.8.1-0ubuntu4.2) dpkg: dependency problems prevent configuration of libqtgui4: libqtgui4 depends on libqt4-declarative (= 4:4.8.1-0ubuntu4.3); however: Package libqt4-declarative is not configured yet. dpkg: error processing libqtgui4 (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of libqt4-declarative:i386: libqt4-declarative:i386 depends on libqt4-xmlpatterns (= 4:4.8.1-0ubuntu4.3); however: Package libqt4-xmlpatterns:i386 is not configured yet. dpkg: error processing libqt4-declarative:i386 (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of libqt4-svg: libqt4-svg depends on libqtgui4 (= 4:4.8.1-0ubuntu4.3); however: Package libqtgui4 is not configured yet. dpkg: error processing libqt4-svg (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of libqt4-opengl: libqt4-opengl depends on libqtgui4 (= 4:4.8.1-0ubuntu4.3); however: Package libqtgui4 is not configured yet. dpkg: error processing libqt4-opengl (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of libqt4-designer: libqt4-designer depends on libqtgui4 (= 4:4.8.1-0ubuntu4.3); however: Package libqtgui4 is not configured yet. dpkg: error processing libqt4-designer (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of libqt4-qt3support: libqt4-qt3support depends on libqt4-designer (= 4:4.8.1-0ubuntu4.3); however: Package libqt4-designer is not configured yet. libqt4-qt3support depends on libqtgui4 (= 4:4.8.1-0ubuntu4.3); however: Package libqtgui4 is not configured yet. dpkg: error processing libqt4-qt3support (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of libqtgui4:i386: libqtgui4:i386 depends on libqt4-declarative (= 4:4.8.1-0ubuntu4.3); however: Package libqt4-declarative:i386 is not configured yet. dpkg: error processing libqtgui4:i386 (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of libqt4-svg:i386: libqt4-svg:i386 depends on libqtgui4 (= 4:4.8.1-0ubuntu4.3); however: Package libqtgui4:i386 is not configured yet. dpkg: error processing libqt4-svg:i386 (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of libqt4-opengl:i386: libqt4-opengl:i386 depends on libqtgui4 (= 4:4.8.1-0ubuntu4.3); however: Package libqtgui4:i386 is not configured yet. dpkg: error processing libqt4-opengl:i386 (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of libqt4-designer:i386: joel@Joel-PC:~$ sudo apt-get install -f [sudo] password for joel: Läser paketlistor... Färdig Bygger beroendeträd Läser tillståndsinformation... Färdig Korrigerar beroenden.... Färdig Följande paket har installerats automatiskt och är inte längre nödvändiga: kde-l10n-sv language-pack-kde-sv-base language-pack-kde-zh-hans-base calligra-l10n-engb calligra-l10n-sv calligra-l10n-zhcn language-pack-kde-en kde-l10n-engb language-pack-kde-sv language-pack-zh-hans-base kde-l10n-zhcn language-pack-zh-hans language-pack-kde-zh-hans language-pack-kde-en-base Använd "apt-get autoremove" för att ta bort dem. Följande ytterligare paket kommer att installeras: libqt4-xmlpatterns Följande paket kommer att uppgraderas: libqt4-xmlpatterns 1 att uppgradera, 0 att nyinstallera, 0 att ta bort och 22 att inte uppgradera. 15 är inte helt installerade eller borttagna. Behöver hämta 0 B/1 033 kB arkiv. Efter denna åtgärd kommer ytterligare 0 B utrymme användas på disken. Vill du fortsätta [J/n]? J dpkg: fel vid hantering av libqt4-xmlpatterns (--configure): libqt4-xmlpatterns:amd64 4:4.8.1-0ubuntu4.2 cannot be configured because libqt4-xmlpatterns:i386 is in a different version (4:4.8.1-0ubuntu4.3) dpkg: fel vid hantering av libqt4-xmlpatterns:i386 (--configure): libqt4-xmlpatterns:i386 4:4.8.1-0ubuntu4.3 cannot be configured because libqt4-xmlpatterns:amd64 is in a different version (4:4.8.1-0ubuntu4.2) dpkg: beroendeproblem förhindrar konfigurering av libqt4-declarative:i386: libqt4-declarative:i386 är beroende av libqt4-xmlpatterns (= 4:4.8.1-0ubuntu4.3), men: Paketet libqt4-xmlpatterns:i386 har inte konfigurerats ännu. dpkg: fel vid hantering av libqt4-declarative:i386 (--configure): beroendeproblem - lämnar okonfigurerad dpkg: beroendeproblem förhindrar konfigurering av libqt4-declarative: libqt4-declarative är beroende av libqt4-xmlpatterns (= 4:4.8.1-0ubuntu4.3), men: Versionen av libqt4-xmlpatterns på systemet är 4:4.8.1-0ubuntu4.2. dpkg: fel vid hantering av libqt4-declarative (--configure): beroendeproblem - lämnar okonfigurerad dpkg: beroendeproblem förhindrar konfigurering av libqtgui4:i386: libqtgui4:i386 är beroende av libqt4-declarative (= 4:4.8.1-0ubuntu4.3), men: Paketet libqt4-declarative:i386 har inte konfigurerats ännu. dpkg: fel vid hantering av libqtgui4:i386 (--configure): beroendeproblem - lämnar okonfigurerad dpkg: beroendeproblem förhindrar koIngen apport-rapport skrevs därför att felmeddelandet indikerar att det är ett efterföljande fel från ett tidigare problem. Ingen apport-rapport skrevs därför att felmeddelandet indikerar att det är ett efterföljande fel från ett tidigare problem. Ingen apport-rapport skrevs därför att felmeddelandet indikerar att det är ett efterföljande fel från ett tidigare problem. Ingen apport-rapport skrevs därför att felmeddelandet indikerar att det är ett efterföljande fel från ett tidigare problem. Ingen apport-rapport skrevs därför att felmeddelandet indikerar att det är ett efterföljande fel från ett tidigare problem. Ingen apport-rapport skrevs därför att felmeddelandet indikerar att det är ett efterföljande fel från ett tidigare problem. nfigurering av libqtgui4: libqtgui4 är beroende av libqt4-declarative (= 4:4.8.1-0ubuntu4.3), men: Paketet libqt4-declarative har inte konfigurerats ännu. dpkg: fel vid hantering av libqtgui4 (--configure): beroendeproblem - lämnar okonfigurerad dpkg: beroendeproblem förhindrar konfigurering av libqt4-designer: libqt4-designer är beroende av libqtgui4 (= 4:4.8.1-0ubuntu4.3), men: Paketet libqtgui4 har inte konfigurerats ännu. dpkg: fel vid hantering av libqt4-designer (--configure): beroendeproblem - lämnar okonfigurerad dpkg: beroendeproblem förhindrar konfigurering av libqt4-designer:i386: libqt4-designer:i386 är beroende av libqtgui4 (= 4:4.8.1-0ubuntu4.3), men: Paketet libqtgui4:i386 har inte konfigurerats ännu. dpkg: fel vid hantering av libqt4-designer:i386 (--configure): beroendeproblem - lämnar okonfigurerad dpkg: beroendeproblem förhindrar konfigurering av libqt4-opengl: libqt4-opengl är beroende av libqtgui4 (= 4:4.8.1-0ubuntu4.3), men: Paketet libqtgui4 har inte konfigurerats ännu. dpkg: fel vid hantering av libqt4-opengl (--configure): beroendeproblem - lämnar okonfigurerad dpkg: beroendeproblem förhindrar konfigurering av libqt4-opengl:i386: libqt4-opengl:i386 är beroende av libqtgui4 (= 4:4.8.1-0ubuntu4.3), men: Paketet libqtgui4:i386 har inte konfigurerats ännu. dpkg: fel vid hantering av libqt4-opengl:i386 (--configure): beroendeproblem - lämnar okonfigurerad dpkg: beroendeproblem förhindrar konfigurering av libqt4-qt3support: libqt4-qt3support är beroende av libqt4-designer (= 4:4.8.1-0ubuntu4.3), men: Paketet libqt4-designer har inte konfigurerats ännu. libqt4-qt3support är beroende av libqtgui4 (= 4:4.8.1-0ubuntu4.3), men: Paketet libqtgui4 har inte konfigurerats ännu. dpkg: fel vid hantering av libqt4-qt3support (--configure): beroendeproblem - lämnar okonfigurerad dpkg: beroendeproblem förhindrar konfigurering av libqt4-qt3support:i386: libqt4-qt3support:i386 är beroende av libqt4-designer (= 4:4.8.1-0ubuntu4.3), men: Paketet libqt4-designer:i386 har inte konfigurerats ännu. libqt4-qt3support:i386 är beroende av libqtgui4 (= 4:4.8.1-0ubuntu4.3), men: Paketet libqtgui4:i386 har inte konfigurerats ännu. dpkg: fel vid hantering av libqt4-qt3support:i386 (--configure): beroendeproblem - lämnar okonfigurerad dpkg: beroendeproblem förhindrar konfigurering av libqt4-scripttools:i386: libqt4-scripttools:i386 är beroende av libqtgui4 (= 4:4.8.1-0ubuntu4.3), men: Paketet libqtgui4:i386 har inte konfigurerats ännu. dpkg: fel vid hantering av libqt4-scripttools:i386 (--configure): beroendeproblem - lämnar okonfigurerad dpkg: beroendeproblem förhindrar konfigurering av libqt4-svg: libqt4-svg är beroende av libqtgui4 (= 4:4.8.1-0ubuntu4.3), men: Paketet libqtgui4 har inte konfigurerats ännu. dpkg: fel vid hantering av libqt4-svg (--configure): beroendeproblem - lämnar okonfigurerad dpkg: beroendeproblem förhindrar konfigurering av libqt4-svg:i386: libqt4-svg:i386 är beroende av libqtgui4 (= 4:4.8.1-0ubuntu4.3), men: Paketet libqtgui4:i386 har inte konfigurerats ännu. dpkg: fel vid hantering av libqt4-svg:i386 (--configure): beroendeproblem - lämnar okonfigurerad Fel uppstod vid hantering: libqt4-xmlpatterns libqt4-xmlpatterns:i386 libqt4-declarative:i386 libqt4-declarative libqtgui4:i386 libqtgui4 libqt4-designer libqt4-designer:i386 libqt4-opengl libqt4-opengl:i386 libqt4-qt3support libqt4-qt3support:i386 libqt4-scripttools:i386 libqt4-svg libqt4-svg:i386 E: Sub-process /usr/bin/dpkg returned an error code (1)

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• C# via Java: Introduction

  - by simonc

  Originally posted on: http://geekswithblogs.net/simonc/archive/2013/11/08/c-via-java-introduction.aspxSo, I've recently changed jobs. Rather than working in .NET land, I've migrated over to Java land. But never fear! I'll continue to peer under the covers of .NET, but my next series will use my new experience in Java to explore the design decisions made in the development of the C# programming language. After all, the design of C# was based on Java 1.2, and both languages have continued to evolve since then, incorporating modern software engineering concepts and requirements. Exploring the differences and similarities between the two will (hopefully) give us a deeper understanding into why .NET is implemented the way it is, the trade-offs involved, and what choices were made when new features were designed and added to the language and framework. Among others, I'll be looking at differences in: Primitives Operators Generics Exceptions Accessibility Collections Delegates and inner classes Concurrency In my next post, I'll start off by looking at the type primitives available in each language, and how Java and C# actually incorporate two different concepts of primitive types in their fundamental language design and use. I'm also thinking of looking at the inner details of Java and the JVM in my blogs, as well as C# and the CLR. If you've got any comments or thoughts on this, please let me know.

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• C# via Java: Introduction

  - by Simon Cooper

  So, I’ve recently changed jobs. Rather than working in .NET land, I’ve migrated over to Java land. But never fear! I’ll continue to peer under the covers of .NET, but my next series will use my new experience in Java to explore the design decisions made in the development of the C# programming language. After all, the design of C# was based on Java 1.2, and both languages have continued to evolve since then, incorporating modern software engineering concepts and requirements. Exploring the differences and similarities between the two will (hopefully) give us a deeper understanding into why .NET is implemented the way it is, the trade-offs involved, and what choices were made when new features were designed and added to the language and framework. Among others, I’ll be looking at differences in: Primitives Operators Generics Exceptions Accessibility Collections Delegates and inner classes Concurrency In my next post, I’ll start off by looking at the type primitives available in each language, and how Java and C# actually incorporate two different concepts of primitive types in their fundamental language design and use. I’m also thinking of looking at the inner details of Java and the JVM in my blogs, as well as C# and the CLR. If you’ve got any comments or thoughts on this, please let me know.

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• Choosing a web development framework?

  - by Bob

  So, I've sort of reached a point where I want to start developing a website. Originally, I planned to build said website using PHP and CodeIgniter, I'm familiar with both, but, truth be told, I'm not too fond of either. I find they just get rather messy, CodeIgniter helps somewhat, but no matter what, it seems that most PHP comes out more obfuscated than it has to be. Anyways, I've come to the point where I want to either use Python or Ruby. I'm familiar in both, though more so towards Python, but I've never done any web development in them. I'll take the necessary time to learn the frameworks (and further my knowledge in the language of my choosing), but I need to choose one. I don't like either language more than the other, they both have their benefits... However, since I've never done any web development with either language, I was hoping that you guys could give me some pointers. What are the available frameworks for each language? What do you recommend and why? Note: I've primarily looked into Rails and Django - but I'm still open to others. I'm looking for one that will work for just one (or maybe two) developers. It has to be fairly easy to learn (but I will take the time to learn it). Also, I'd like it to easily support clean code and agile development.

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• First time application where to start?

  - by Nazariy

  After many years of searches and copy pasting, I'm still looking for simple solution that can transliterate text input on the fly from one key set to another. There are quite few online services that provide this feature but it still quite annoying to go online all the time. Unfortunately there is not that many applications left which are capable of doing so, and none of them supported by this day. I decided to make my own and at same time to learn something new for my self. The idea is quite simple: application should sit in system tray and wait until input language get changed, for example to Russian. If Russian language is activated, application should start to listen for user key strokes combination and replace them based on custom dictionary for example R = ?, SH = ? etc. I should be able to bind application to any installed language (Russian, Ukrainian, Bulgarian, Belarusian etc.) and customise dictionary for any of them. So my question is: Which language should I chose for this task C++, C# or might be something hardcore like Assembler, as application should work natively with Windows XP/Vista/7 or possibly Mac. (cross platform support is good but my main target is Windows) Due to nature of application behaviour how can I tell anti-virus software that it is not a "Key Logger" and basically not a virus? Where should I start and what should I be aware of? P.S. My current programming knowledge is quite basic, PHP and JavaScript with Object Oriented approach.

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• Security vulnerability and nda's [closed]

  - by Chris

  I want to propose a situation and gain insight from the communities thoughts. A customer, call them Customer X has a contract with a vendor, Vendor Y to provide an application and services. Customer X discovers a serious authentication vulnerability in Vendor Y's software. Vendor Y and Customer X has a discussion. Vendor Y acknowledges/confirms flaw. Vendor Y confirms they will put effort to fix. Customer X requests Vendor Y to inform all customers impacted by this. Vendor agrees. Fast forward 2 months, and the flaw has not been fixed. Patches were applied to mitigate but the flaw still exists. However, no customers were informed of issue. At this point customer X contacts Vendor Y to determine the status and understand why customer's were not informed. The vendor nicely reminds the customer they are under an NDA and are still working on the issue. A few questions/discussion pieces out of this. By discussing a software flaw with a vendor, does this imply you have agreed to any type of NDA disclosure? Additionally, what rights as does Customer X have to inform other customers of this vulnerability if vendor does not appear willing to comply? I (the op) am under the impression that when this situation occurs, you are supposed to notify vendor of issue, provide them with ample time to respond and if no response you are able to do what you wish with the information. I am thinking back to the MIT/subway incident where they contacted transit authorities, transit authorities didn't respond in a timely fashion so the students disclosed the information publicly on their own. Few things to note about this: I am not the customer in above situation, also lets assume for purposes of keeping discussion inline that customer X has no intentions of disclosing information, they are merely concerned and interested in making sure other customers are aware until it is fixed so they do not expierence a major security breach. (More information can be supplied if needed to add context to question. )

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• Ruby or Python?

  - by Bobby Tables

  Hi all, This question is extremely subjective and open-ended. It might even sound like something I should just research for myself and make my own decision. But I'd like to put it out there and get some thoughts from others. Long story short - I burned out with the rat race and am on a self-funded sabbatical this year. Much of it is to take a break from the corporate grind and travel around, but I also want to play around with new technologies and do some self-learning projects, to stay up to speed on programming, and well - I just love tinkering with programming, when there's no pressure! Here's the thing: I am a lifetime C/C++/Java programmer. I'm a bit of a squiggly bracket snob since I've been working with this family of languages for my entire programming career. So I'd like to learn a language which isn't so closely syntactically related to this group. What I'm basically looking for is a language which is relatively general purpose, fun to learn, has some new concepts that are different from C++/Java, and has a good community. A secondary consideration is that it has good web development frameworks. A tertiary consideration is that it's not totally academic (read: there are real world jobs out there using it). I've narrowed it down to Ruby or Python. My impression of Ruby is that it is extremely web oriented - that the only real application of it is as a server side scripting language for doing web stuff (mainly Ruby on Rails). For Python I'm not so sure. TL;DR and to put it as succinctly as possible: which of these would be better for a C++/Java guy to learn to get some new perspectives on programming? And which is more open and general purpose and applicable to a wider set of applications? I'm leaning towards Ruby at the moment, but I worry to an extent that it looks like it's used as nothing but a server side web language.

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• ArchBeat Link-o-Rama for August 2, 2013

  - by OTN ArchBeat

  Podcast: Data Warehousing and Oracle Data Integrator - Part 2 Part to of the discussion about Data Warehousing and Oracle Data Integrator focuses on a discussion of how data warehousing is changing and the forces driving that change. Panelists for this discussion are Uli Bethke, Oracle ACE Director Cameron Lackpour, Oracle ACE Director (and guest producer) Gurcan Orhan, and Michael Rainey. Case Management In-Depth: Cases & Case Activities Part 1 – Acivity Scope | Mark Foster FMW solution architect Mark Foster kicks off a new series with a look at the decisions made on the scope of BPM process case activities. Video: Quick Intro to WebLogic Maven Plugin 12.1.2 | Mark Nelson This YouTube video by FMW solution architect Mark Nelson offers a quick introduction to the basics of installing and using the new Oracle WebLogic 12.1.2 Maven Plugin. Running the Managed Coherence Servers Example in WebLogic Server 12c | Tim Middleton FMW solution architect Tim Middleton shares the technical details on the new Managed Coherence Servers feature and outlines how you can run the sample application available with a WebLogic Server 12.1.2 install. What’s wrong with how we develop and deliver SOA Applications today? | Mark Nelson "When we arrive at the go-live day, we have a lot of fear and uncertainty," says solution architect Mark Nelson of the typical SOA practice. "We have no idea if the system is going to work in production. We have never tested it under a production-like load, and we have not really tested it for performance, longevity, etc." OTN Latin America Tour 2013 | Kai Yu Oracle ACE Director Kai Yu shares the session abstracts from his participation in the 2013 Oracle Technology Network Latin America conference tour, which made its way through OUG conferences in Ecuador, Guatemala, Panama, and Costa Rica. Webcast: Latest Security Innovations in Oracle Database 12c Oracle Database 12c includes more new security capabilities than any other release in Oracle history! In this webcast Roxana Bradescu (Director, Oracle Database Security Product Management) will discuss these capabilities and answer your questions. (Registration required.) Thought for the Day "The main goal in life career-wise should always be to try to get paid to simply be yourself." — Kevin Smith (Born August 2, 1970) Source: brainyquote.com

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• UPDATE MANAGER UNABLE TO UPDATE

  - by muguro

  Requires installation of untrusted packages The action would require the installation of packages from not authenticated sources. i get this error every time i try updating. the system shows that it has 466 updates but fails after clicking update more details have this accountsservice apparmor apport apport-gtk apt apt-transport-https apt-utils aptdaemon aptdaemon-data at-spi2-core bamfdaemon base-files bcmwl-kernel-source bind9-host compiz compiz-core compiz-gnome compiz-plugins-default cron cups cups-bsd cups-client cups-common cups-filters cups-ppdc dbus dbus-x11 dconf-gsettings-backend dconf-service desktop-file-utils dmsetup dnsutils empathy empathy-common eog evince evince-common evolution-data-server evolution-data-server-common firefox firefox-globalmenu firefox-gnome-support firefox-locale-en fontconfig fontconfig-config fonts-liberation fonts-opensymbol foomatic-filters gcalctool gdb ghostscript ghostscript-cups ghostscript-x ginn gir1.2-atspi-2.0 gir1.2-dbusmenu-glib-0.4 gir1.2-dbusmenu-gtk-0.4 gir1.2-gst-plugins-base-0.10 gir1.2-gtk-3.0 gir1.2-gtksource-3.0 gir1.2-gudev-1.0 gir1.2-javascriptcoregtk-3.0 gir1.2-launchpad-integration-3.0 gir1.2-pango-1.0 gir1.2-rb-3.0 gir1.2-totem-1.0 gir1.2-ubuntuoneui-3.0 gir1.2-unity-5.0 gir1.2-webkit-3.0 glib-networking glib-networking-common glib-networking-services gnome-accessibility-themes gnome-control-center gnome-control-center-data gnome-desktop3-data gnome-games-data gnome-icon-theme gnome-media gnome-orca gnome-settings-daemon gnome-sudoku gnomine gnupg google-talkplugin gpgv grub-common grub-pc grub-pc-bin grub2-common gstreamer0.10-alsa gstreamer0.10-plugins-base gstreamer0.10-plugins-base-apps gstreamer0.10-x gvfs gvfs-backends gvfs-bin gvfs-common gvfs-daemons gvfs-fuse gvfs-libs gwibber gwibber-service gwibber-service-facebook gwibber-service-identica gwibber-service-twitter hdparm hplip hplip-data indicator-sound initscripts isc-dhcp-client isc-dhcp-common jockey-common jockey-gtk krb5-locales landscape-client-ui-install language-pack-en language-pack-en-base language-pack-gnome-en language-pack-gnome-en-base launchpad-integration libaccountsservice0 libapt-inst1.4 libapt-pkg4.12 libart-2.0-2 libasound2 libatspi2.0-0 libbamf0 libbamf3-0 libbind9-80 libc-bin libc-dev-bin libc6 libc6-dev libcairo-gobject2 libcairo2

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• Low pagerank backlinks - does Google penalize?

  - by Programmer Joe

  I have a new stock discussion forum and I would like to promote it. Specifically, I have two ideas in mind to help promote it: 1) Become a member at other stock discussion forums. Make high quality posts, build a good reputation, and leave a link to my own forum in a non intrusive way (ie. in signature or at the end of my posts). This approach makes sense because you can find other members in other forums that are interested in stock discussion and a backlink to your forum, as long as it is not done in an intrusive/spammy way, should come across as acceptable. 2) Promote my site by writing articles at Squidoo, Hubpages, etc. This approach also makes sense because that's what Squidoo and Hubpages is for. The problem with both these approaches is that when I leave a backlink to my site, the page that I am leaving a backlink from may have a low PR - most likely, a PR of 0. Now, I have read that after the Penguin update by Google, your site can be penalized if you have too many backlinks from low PR pages: http://www.entrepreneur.com/article/224339 So, I am caught in a dilemma: a) If I start promoting my site via other stock forums, Squidoo, Hubpages, etc, but the backlink to my site comes from a page with low PR, Google may penalize my site. b) However, if I don't promote my site, nobody will ever discover it (aside from other promotion techniques like social media promotion, directories, etc).

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