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• Is it a problem if i query again and again to SQL Server 2005 and 2000?

  - by learner

  Window app i am constructing is for very low end machines (Celeron with max 128 RAM). From the following two approaches which one is the best (I don't want that application becomes memory hog for low end machines):- Approach One:- Query the database Select GUID from Table1 where DateTime <= @givendate which is returning me more than 300 thousands records (but only one field i.e. GUID - 300 thousands GUIDs). Now running a loop to achieve next process of this software based on GUID. Second Approach:- Query the database Select Top 1 GUID from Table1 where DateTime <= @givendate with top 1 again and again until all 300 thousands records done. It will return me only one GUID at a time, and I can do my next step of operation. What do you suggest which approach will use the less Memory Resources?? (Speed / performance is not the issue here).

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• Converting table based layout into a div/css based one.

  - by nimo9367

  I'm supposed to rewrite the UI for a rather large web application. The thing is that the layout is completely based on tables and if I could somehow, semi automatically, convert the tables into divs it would save me a huge amount of time. What are the best practices when doing something like this? Is this a good idea at all? The application use layout files (containing something similar to helpers) that are parsed into html at runtime and the application itself also output html at specific places. So the work will consist of converting these helpers and the htmloutput code within the application.

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• Test Driven Development (TDD) with Rails

  - by macek

  I am looking for TDD resources that are specific to Rails. I've seen the Rails Guide: The Basics of Creating a Rails Plugin which really spurred my interest in the topic. I have the Agile Development with Rails book and I see there's some testing-related information there. However, it seems like the author takes you through the steps of building the app, then adds testing afterward. This isn't really Test Driven Development. Ideally, I'd like a book on this, but a collection of other tutorials or articles would be great if such a book doesn't exist. Things I'd like to learn: Primary goal: Best Practices Unit testing How to utilize Fixtures Possibly using existing development data in place of fixtures What's the community standard here? Writing tests for plugins Testing with session data User is logged in User can access URL /foo/bar Testing success of sending email Thanks for any help!

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• How to setup custom CSS based on account settings in a Django site?

  - by sdolan

  So I'm writing a Django based website that allows users select a color scheme through an administration interface. I already have middleware/context processors that links the current request (based on domain) to the account. My question is how to dynamically serve the CSS with the account's custom color scheme. I see two options: Add a CSS block to the base template that overrides the styles w/variables passed in through a context processors. Use a custom URL (e.g. "/static/dynamic/css//styles.css") that gets routed to a view that grabs all the necessary values and creates the css file. I'm content with either option, but was wondering if anyone else out there has dealt with similar problems and could give some insight as to "Best Practices".

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• What is a good balance for having developers learn at work

  - by Mel

  So now I am the manager. One of the things I always promised myself I would do is have the other developers focus on learning new stuff. In fact I even want to force them to read a couple books that really helped me learn to program. However now I am also accountable for the product getting finished. I have this vision of everyone reading books instead of working and me getting fired. What is the best way to work learning into the developers schedules, especially for the ones that just don't care to learn. How much time should be spent on learning in a work week?

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• How to keep statefull web clients in sync, when multiple clients are looking at the same data?

  - by Hilbrand

  In a RIA web client, created with GWT, the state is maintained in the web client, while the server is (almost) stateless (this is the preferred technique to keep the site scalable). However, if multiple users looking at the same data in their browser and one user changes something, which is send to the server and stored in the database, the other users still have the old data in their browser state. For example a tree is shown and one of the users adds/removes an item from the tree. Since there can be a lot of state in the client, what is the best technique to keep the state in the clients in sync? Are there any java frameworks that take care of this?

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• Which is the best CMS?

  - by Nitz

  Hello Guys, My Boss wants to know about CMS. means he want to know which is best CMS We are using Drupal. But he still not satisfied with it? So i had thought, what is best resource for find that? Then I realize that who can give me better suggestion then big community like SO. So I am asking you as developer what will you suggest about CMS? CMS can be in any language but it should be use for building website. So what do you think which CMS is best?

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• How to organize database access code in Android project?

  - by Mladen Jablanovic

  I have created a ContentProvider for my main Sqlite table, pretty much following NotePad example from SDK (although I am not sure whether I will ever be exposing my data to other apps). However, I need to create lots of other, non-trivial queries on that and other tables and views. A good example would be queries to extract some statistics from the base data, averages, totals etc. So what's the best place for this code in an Android project? How it should be related and connected to the Uri-based data access exposed by a Provider? Any good examples out there?

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• What do you name your files when using MVC?

  - by sprugman

  When using the MVC pattern, which I'm not terribly experienced with, I find myself naming things like this: /app/views/widget.php /app/models/widget.php /app/controllers/widget.php That appeals to me because it's easy to find associated classes, and I lean towards shorter names when practical. However, when I'm looking in my IDE, I see three different files called widget.php, which is confusing. I'm tempted to add "_v", "_c", "_m" or something to each name. How do you handle this? FWIW, I'm using CodeIgniter at the moment, and I don't know if there are any special benefits to using a particular convention, or any standard practices. Regardless, I'm intersted in the best-practices from various platforms.

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• Model association changes in production environment, specifically converting a model to polymorphic?

  - by dustmoo

  Hi everyone, I was hoping I could get feedback on major changes to how a model works in an app that is in production already. In my case I have a model Record, that has_many PhoneNumbers. Currently it is a typical has_many belongs_to association with a record having many PhoneNumbers. Of course, I now have a feature of adding temporary, user generated records and these records will have PhoneNumbers too. I 'could' just add the user_record_id to the PhoneNumber model, but wouldn't it be better for this to be a polymorphic association? And if so, if you change how a model associates, how in the heck would I update the production database without breaking everything? .< Anyway, just looking for best practices in a situation like this. Thanks!

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• What is a good rule for when to prepend members with 'this' (C#)?

  - by RichAmberale

  If I am accessing a member field, property, or method, I'm never sure when I should prepend it with 'this'. I am not asking about cases where it is required, like in the case where a local variable has the same name. I am talking about cases where the meaning is exactly the same. Which is more readable? Are there any standards, best practices, or rules of thumb I should be following? Should it just be consistent throughout a class, or an entire code base?

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• Guidance on using drop in DLLs

  - by Scott Chamberlain

  I have been giving the task to rewrite a internal utility in .net for my work. One of program requirements the new system has is have a dll that implements a set of interfaces and have the program call the DLL. Now this dll will be changed out a lot per deployment. My question is what is the best way to do it from a development standpoint? Do I add a template DLL (one that only has the interfaces but no implementation) to the project references like I would do any other dll that I would use. Or do I need to use somthing like this every time I want to use code from the dll? var DropIn = System.Reflection.Assembly.LoadFrom("DropInDll.dll"); var getActions = DropIn.GetType("Main").GetMethod("GetActions"); List<IAction> ActionList = (List<IAction>)getActions.Invoke(null, null);

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• Ways to Unit Test Oauth for different services in ruby?

  - by viatropos

  Are there any best practices in writing unit tests when 90% of the time I'm building the Oauth connecting class, I need to actually be logging into the remote service? I am building a rubygem that logs in to Twitter/Google/MySpace, etc., and the hardest part is making sure I have the settings right for that particular provider, and I would like to write tests for that. Is there a recommended way to do that? If I did mocks or stubs, I'd still have to spend that 90% of the time figuring out how to use the service, and would end up writing tests after the fact instead of before...

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• Fastest way to convert a binary file to SQLite database

  - by chown

  I've some binary files and I'm looking for a way to convert each of those files to a SQLite database. I've already tried C# but the performance is too slow. I'm seeking an advice on how and what programming language should be the best to perform this kind of conversion. Though I prefer any Object Oriented Language more (like C#, Java etc), I'm open for any programming language that boosts up the conversion. I don't need a GUI frontend for the conversion, running the script/program from console is okay. Thanks in advance

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• Best way to make a script to SSH?

  - by Paul

  My university has quite a lot files (like past papers etc) which I need to be on the uni network to access them. I ssh, using port forwarding, into the network and set my browser (Firefox) to go through that port. I know it would be quite easy to write something in most languages that would enter the command into a terminal, but which language/method could I use to make this happen? I expect some sort of scripting language could but I really know nothing about them, but I'd be willing to learn one just to have a little fun with this. I'm using a cygwin terminal on Windows 7, if that will make a difference. To neaten up my question: Which language would be best to acheive the above effect? Not necessarily the best, just possible and relatively simple to learn. I used the word best so I suppose I'll put a subjective tag.

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• Do you leave historical code commented out in classes that you update?

  - by 18Rabbit

  When you need to obsolete a section of code (say either the business rules changed, or the old system has been reworked to use a new framework or something) do you delete it from the file or do you comment it out and then put in the new functionality? If you comment it out, do you leave a note stating why it was removed and what it was originally intended to do? I ask mainly because I've done a lot of contract work for different places over the years and sometimes it's like excavating a tomb to find the actual code that is still being used. Why comment it out and leave it in the file if source control has a record of what used to be there? If you comment out a method do you also comment out/delete any methods that were exclusively used by that method? What do you think the best practices for this should be?

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• Linux Mint 13 64bit Cinnamon and Oracle Virtualbox: 3d acceleration crash

  - by Stephen Swensen

  I've recently got an interest in Linux. After some research, it looks like Linux Mint 13 cinnamon is hot and I thought I'd try it out... I'm running Windows 7 64bit and have experience with Oracle Virtual Box. So I thought it would be a good idea to try out Linux Mint inside Virtual Box. I download Linux Mint 13 64bit Cinnamon and set it up in my VM player... Nothing special about my settings. Except Linux Mint 13 Cinnamon requires 3d acceleration, and when I enable that, it crashes whenever I open the Menu in the bottom left corner of the guest OS (and some other times too)... I've seen other mentions of this problem on the web, but no solutions. Is there a solution? If not, any suggestions short of installing the OS on a partition for trying out this OS (I'm not interested in the LIve mode either - I'd really like to get the full feel for it)?

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• Quickly revert an Oracle Database to a known state

  - by Anthony

  I would like to use Selenium to test a web application but in order to do that successfully the tests must be run against a database at a known state. The recording and running of the Selenium tests is not within the scope of this website so I'm only looking for recommendations on how best to revert the database after each test execution. Some details: current database size is 30GB however only about 4GB needs to be reverted database is Oracle 11g Standard Edition running on Windows Server 2003 the data in 6 different schemas needs to be reverted Ideally the process should be scripted so that it can be re-executed frequently and automatically via a scheduled task.

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• Keyboard in Oracle VirtualBox

  - by marc_s

  My buddy is running Oracle VirtualBox, and everything works fine - except for the fact that the backslash ( \ ) key on a Swiss-German keyboard doesn't work - instead you're getting a vertical bar ( | ) - which is really quite annoying if you're trying to type in UNC paths.... The \ on a Swiss-German keyboard is on the key with the < and > signs - you need to press Alt Gr or Alt+Ctrl to get it. Is there any way to teach VirtualBox that we're using a Swiss German keyboard and that it should respect the keyboard layout??

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• opening Dbf files in oracle 10g

  - by nagaraju

  This nagaraju,from India,Hyderabad. I have installed oracle 10g trail version in my system(E drive),created one database with my name(database:-nagaraju),in that created tables, prodecures ,functions ,sequences etc for my project. Due to some sudden problem,i formatted my machine C drive,now iam not ablle to open my database, i need all procedures ,tables which i created in that. Now I newly installed oracle10g again in another folder,how can i copy my old database into my inew installation database. Or can i copy the script of procedures so that ican run in new database. I have all data in Oradata folder,like DBF files etc. Could you please help me, how to do that?

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• Connecting SQL 2005 to Oracle 10g

  - by Lorn

  Environment: - Oracle 10g database over a windows 32bit 2003 server - SQL 2005 database over a windows 32 bit 2003 server. I am trying to connect the above databases through heterogeneous services. I have updated the following files: TNSNames.ora, Listener.ora and hs.ora. When performing a test connection from SQL developer, I get the following error - ORA 28500 - indicating that the login for SA user is incorrect. I also tried using another authenticated user that has rights to the database. I can successfully connect with SQL 2000. Has anyone experienced such a problem before?

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• Oracle 10g Failover Database - How to fail back?

  - by rrkwells

  I want to know how the failover database concept works after recovery. We have defined our application to connect to a backup database in case the production database fails. If this happens, then all the transactions will be happening on that backup database. Once the production db server is running again, then how do we make sure the changes made in the backup database will be reflected on the production database? We want to make sure that any changes made while failed over are not lost. We are using Oracle 10g.

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• Oracle Unicode problem when using NLS_CHARACTERSET is WE8ISO8859P1 and NLS_NCHAR_CHARACTERSET is AL16UTF16, and ColdFusion as programming language

  - by tsurahman

  I have 2 Oracle 10g database, XE and Enterprise XE Enterprise and this are the data type I've use in the test table and then I tried to test to insert some Unicode char from http://www.sustainablegis.com/unicode/ and the results are XE Enterprise for this test, I use ColdFusion 9 developer edition <cfprocessingDirective pageencoding="utf-8"> <cfset setEncoding("form","utf-8")> <form action="" method="post"> Unicode : <br> <textarea name="txaUnicode" id="txaUnicode" cols="50" rows="10"></textarea> <br><br> Language : <br> <input type="Text" name="txtLanguage" id="txtLanguage"> <br><br> <input type="Submit"> </form> <cfset dsn = "theDSN"> <cfif StructKeyExists(FORM, "FIELDNAMES")> <cfquery name="qryInsert" datasource="#dsn#"> INSERT INTO UNICODE ( C_VARCHAR2, C_CHAR, C_CLOB, C_NVARCHAR2, LANGUAGE ) VALUES ( <cfqueryparam cfsqltype="CF_SQL_VARCHAR" value="#FORM.TXAUNICODE#">, <cfqueryparam cfsqltype="CF_SQL_CHAR" value="#FORM.TXAUNICODE#">, <cfqueryparam cfsqltype="CF_SQL_LONGVARCHAR" value="#FORM.TXAUNICODE#">, <cfqueryparam cfsqltype="CF_SQL_VARCHAR" value="#FORM.TXAUNICODE#">, <cfqueryparam cfsqltype="CF_SQL_VARCHAR" value="#FORM.TXTLANGUAGE#"> ) </cfquery> </cfif> <cfquery name="qryUnicode" datasource="#dsn#"> SELECT * FROM UNICODE ORDER BY LANGUAGE </cfquery> <table border="1"> <thead> <tr> <th>LANGUAGE</th> <th>C_VARCHAR2</th> <th>C_CHAR</th> <th>C_CLOB</th> <th>C_NVARCHAR2</th> </tr> </thead> <tbody> <cfoutput query="qryUnicode"> <tr> <td>#qryUnicode.LANGUAGE#</td> <td>#qryUnicode.C_VARCHAR2#</td> <td>#qryUnicode.C_CHAR#</td> <td>#qryUnicode.C_CLOB#</td> <td>#qryUnicode.C_NVARCHAR2#</td> </tr> </cfoutput> </tbody> </table> from this guide http://www.stanford.edu/dept/itss/docs/oracle/10g/server.101/b10749/ch6unicode.htm#i1007297 I think for my Enterprise database it should produce same thing as XE (at least for NVARCHAR2 column) since the typical solution from that guide said: Use NCHAR and NVARCHAR2 datatypes to store Unicode characters Keep WE8ISO8859P1 as the database character set Use AL16UTF16 as the national character set So, how to make it works too in my Enterprise database? Thank you :)

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• OWB 11gR2 &ndash; OLAP and Simba

  - by David Allan

  Oracle Warehouse Builder was the first ETL product to provide a single integrated and complete environment for managing enterprise data warehouse solutions that also incorporate multi-dimensional schemas. The OWB 11gR2 release provides Oracle OLAP 11g deployment for multi-dimensional models (in addition to support for prior releases of OLAP). This means users can easily utilize Simba's MDX Provider for Oracle OLAP (see here for details and cost) which allows you to use the powerful and popular ad hoc query and analysis capabilities of Microsoft Excel PivotTables® and PivotCharts® with your Oracle OLAP business intelligence data. The extensions to the dimensional modeling capabilities have been built on established relational concepts, with the option to seamlessly move from a relational deployment model to a multi-dimensional model at the click of a button. This now means that ETL designers can logically model a complete data warehouse solution using one single tool and control the physical implementation of a logical model at deployment time. As a result data warehouse projects that need to provide a multi-dimensional model as part of the overall solution can be designed and implemented faster and more efficiently. Wizards for dimensions and cubes let you quickly build dimensional models and realize either relationally or as an Oracle database OLAP implementation, both 10g and 11g formats are supported based on a configuration option. The wizard provides a good first cut definition and the objects can be further refined in the editor. Both wizards let you choose the implementation, to deploy to OLAP in the database select MOLAP: multidimensional storage. You will then be asked what levels and attributes are to be defined, by default the wizard creates a level bases hierarchy, parent child hierarchies can be defined in the editor. Once the dimension or cube has been designed there are special mapping operators that make it easy to load data into the objects, below we load a constant value for the total level and the other levels from a source table.   Again when the cube is defined using the wizard we can edit the cube and define a number of analytic calculations by using the 'generate calculated measures' option on the measures panel. This lets you very easily add a lot of rich analytic measures to your cube. For example one of the measures is the percentage difference from a year ago which we can see in detail below. You can also add your own custom calculations to leverage the capabilities of the Oracle OLAP option, either by selecting existing template types such as moving averages to defining true custom expressions. The 11g OLAP option now supports percentage based summarization (the amount of data to precompute and store), this is available from the option 'cost based aggregation' in the cube's configuration. Ensure all measure-dimensions level based aggregation is switched off (on the cube-dimension panel) - previously level based aggregation was the only option. The 11g generated code now uses the new unified API as you see below, to generate the code, OWB needs a valid connection to a real schema, this was not needed before 11gR2 and is a new requirement since the OLAP API which OWB uses is not an offline one. Once all of the objects are deployed and the maps executed then we get to the fun stuff! How can we analyze the data? One option which is powerful and at many users' fingertips is using Microsoft Excel PivotTables® and PivotCharts®, which can be used with your Oracle OLAP business intelligence data by utilizing Simba's MDX Provider for Oracle OLAP (see Simba site for details of cost). I'll leave the exotic reporting illustrations to the experts (see Bud's demonstration here), but with Simba's MDX Provider for Oracle OLAP its very simple to easily access the analytics stored in the database (all built and loaded via the OWB 11gR2 release) and get the regular features of Excel at your fingertips such as using the conditional formatting features for example. That's a very quick run through of the OWB 11gR2 with respect to Oracle 11g OLAP integration and the reporting using Simba's MDX Provider for Oracle OLAP. Not a deep-dive in any way but a quick overview to illustrate the design capabilities and integrations possible.

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• Welcome to the SOA &amp; E2.0 Partner Community Forum

  - by Jürgen Kress

  With more than 200 registrations the SOA & E2.0 Partner Community Forum is a huge success!   Conference program Is available online: http://tinyurl.com/soaforumagenda Agenda Tuesday March 15th 2011 12:15 Welcome & Introduction – Hans Blaas & Jürgen Kress, Oracle 12:30 Oracle Middleware Strategy and Information on Application Grid and Exalogic - Andrew Sutherland, Oracle 13:15 Managing Online Customer, Partner and Employee Engagement Oracle E2.0 Solutions - Andrew Gilboy, Oracle 14:00 Coffee Break 14:30 Partner SOA/ BPM Reference Case – Leon Smiers, Capgemini 15:15 Partner WebCenter/ UCM Reference Case – Vikram Setia, Infomentum 16.00 Break 16.30 SOA and BPM 11gR1 PS3 Update – David Shaffer 17:00 Why specialization is important for Partners – Nick Kritikos, Hans Blaas & Jürgen Kress 17:45 Social Event   Wednesday March 16th 2011 09.00 Welcome & Introduction Day II 09.15 Breakout sessions Round 1 SOA Suite 11g PS3 & OSB Importance of ADF & Jdeveloper SOA Security IDM WebCenter PS3, Whats New E2.0 Sales Plays 10.30 Break 10.45 Breakout sessions Round 2 WebCenter PS3, Whats New Applications Management Enterprise Manager and Amberpoint ADF/WebCenter 11g integration with BPM Suite 11g Importance of ADF & Jdeveloper JCAPS & OC4J migration opportunities for service business 12.00 Lunch 13.00 Breakout sessions Round 3 BPM 11g, Whats New Universal Content Management! 11g SOA Security IDM E2.0 Surrounding Products: ATG, Documaker, Primavera Middleware Industry Value Propositions & Sales Plays 14.30 Break 14.45 Fusion Applications, Rajan Krishnan, Oracle 15.30 SOA & E2.0 Summary & Closing, Hans Blaas & Jürgen Kress, Oracle 15.45 Finish & Departure 16:00 Bus departure   Capgemini Nederland BV Papendorpseweg 100 3500 GN Utrecht The Netherlands Tel: +31 30 689 00 00 For a detailed routedescription by car or public transport please visit: http://www.nl.capgemini.com/pdf/Papendorp_UK.pdf Hotel In case you have not booked your hotel yet, please make your own hotel reservation. You can book your hotel room at the 'Hotel Vianen' at a special rate, by using the Oracle booking code: DDG VIA-GF41422. One night package € 110,- for a single room, including breakfast. Kindly secure your hotel room as soon as possible. The number of rooms is limited! Hotel Vianen Prins Bernhardstraat 75 4132 XE Vianen [email protected] The Netherlands [email protected] Arrival on 14th of March and staying at Hotel Vianen. On 15th of March we have arranged a transfer from Hotel Vianen to the Capgemini Offices. The bus is parked in front of the hotel and will leave at 10.15AM (UTC/GMT+1). Logistics Pass with barcode At your arrival you will receive a pass with a barcode. This pass will give you access to the conference building and the different floors within the building. Please make sure to hand in your pass at the registration desk at the end of the day. Arrival by plane Transfer from Schiphol Airport to Capgemini on 15th of March will be arranged by Oracle. A hostess will be welcoming you at the Meeting Point at Schiphol Airport (this is a red and white large cubicle situated next to Delifrance) The buses will depart from Schiphol Airport at 09.00AM, 09.45AM and 10.30AM (UTC/GMT+1).     For future SOA Partner Community Forums  become a member for registration please visit www.oracle.com/goto/emea/soa (OPN account required) Blog Twitter LinkedIn Mix Forum Wiki Website Technorati Tags: SOA Partner Community Forum,Community,SOA Partner Community,Utrecht 03.2011,OPN,Oracle,Jürgen Kress

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