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• What is the correlation between programming language and experience/skills of their users?

  - by Petr Pudlák

  I'm sure there is such a correlation, because experience and skill leads good programmers to picking languages that are better for them, in which they're more productive, and working in a language forms how programmers think and influences their methods and skills. Is there any research or some statistical data of this phenomenon? Perhaps this is not a purely academic question. For example, if someone is starting a new project, it could be worth considering a language (among other criteria of course) for which there is a higher chance of finding or attracting experienced programmers. Update: Please don't fixate on the last paragraph. It's not my intention to choose a language based on this criterion, and I know there are other far more important ones. My interested is mostly academic. It comes from the (subjective) observation and I wonder if someone has researched it a bit. Also, I'm talking about a correlation, not about a rule. Sure there are both great and terrible programmers in every language. Just that in general it seems to me there is a correlation.

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• Workflow Overview & Best Practices - EMEA

  - by Annemarie Provisero

  ADVISOR WEBCAST: Workflow Overview & Best Practices - EMEA PRODUCT FAMILY: EBS - ATG - Workflow   February 16, 2011 at 10:00 am CET, 02:30 pm India, 06:00 pm Japan, 08:00 pm Australia This 1.5-hour session is recommended for technical and functional Users who are interested to get an generic overview about the Tools and Utilities available to get a closer look into the Java Virtual Machine used in an E-Business Suite Environment and how to tune it. TOPICS WILL INCLUDE: Introduction of Workflow Useful Utilities and Tools Best Practices Q&A A short, live demonstration (only if applicable) and question and answer period will be included. Oracle Advisor Webcasts are dedicated to building your awareness around our products and services. This session does not replace offerings from Oracle Global Support Services. Click here to register for this session ------------------------------------------------------------------------------------------------------------- The above webcast is a service of the E-Business Suite Communities in My Oracle Support.For more information on other webcasts, please reference the Oracle Advisor Webcast Schedule.Click here to visit the E-Business Communities in My Oracle Support Note that all links require access to My Oracle Support.

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• UPK Pre-built Content Now Available for Additional Product Lines

  - by Karen Rihs

  UPK pre-built content development efforts are always underway and growing, and now include the recent release of new UPK pre-built content modules for three additional product lines! Oracle Utilities for Meter Data Management 2.0.1 Administrative Setup User Tasks VEE and Usage Rules Working with Measurement Data Fusion 11g Release 1 Functional Setup Manager General Ledger Global Human Resources Project Portfolio Management Self Service Procurement Oracle Crystal Ball 11.1.2 Oracle Crystal Ball For the most recent list of modules currently available for each product line, visit the UPK Resource Library on Oracle.com. For more information on how your organization can take advantage of UPK pre-built content, see our previous blog, The Value of UPK Pre-Built Content.  - Karen Rihs, UPK Outbound Product Management

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• Should developers be responsible for tests other than unit tests?

  - by Jackie

  I am currently working on a rather large project, and I have used JUnit and EasyMock to fairly extensively unit test functionality. I am now interested in what other types of testing I should worry about. As a developer is it my responsibility to worry about things like functional, or regression testing? Is there a good way to integrate these in a useable way in tools such as Maven/Ant/Gradle? Are these better suited for a Tester or BA? Are there other useful types of testing that I am missing?

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• How do you decide what kind of database to use?

  - by Jason Baker

  I really dislike the name "NoSQL", because it isn't very descriptive. It tells me what the databases aren't where I'm more interested in what the databases are. I really think that this category really encompasses several categories of database. I'm just trying to get a general idea of what job each particular database is the best tool for. A few assumptions I'd like to make (and would ask you to make): Assume that you have the capability to hire any number of brilliant engineers who are equally experienced with every database technology that has ever existed. Assume you have the technical infrastructure to support any given database (including available servers and sysadmins who can support said database). Assume that each database has the best support possible for free. Assume you have 100% buy-in from management. Assume you have an infinite amount of money to throw at the problem. Now, I realize that the above assumptions eliminate a lot of valid considerations that are involved in choosing a database, but my focus is on figuring out what database is best for the job on a purely technical level. So, given the above assumptions, the question is: what jobs are each database (including both SQL and NoSQL) the best tool for and why?

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• Too much I/O in the morning ?

  - by steveh99999

  Interesting little improvement on a SQL 2005 system I encountered recently….. Some background - this system had a fairly ‘traditional OLTP’ workload ie  heavily used during day – till around 9pm, then had a batch window for several hours, then not much activity in the early hours of the day, until normal workload resumed the following morning. Using perfmon, I noticed that every morning, we would see a big spike in SQL Server I/O when the application started to be used... As it was 2005 I decided to look at what tables were in cache before and after the overnight batch processing ran… ( using DMV equivalent of dbcc memusage that I posted earlier). Here’s what I saw :-     So, contents of data cache split fairly evenly between my 'important/heavily used' tables.   After this:- some application batch processing,backups, DBCC checks and reindexes were run.  A fairly standard batch I'd suggest. Cache contents then looked like this :- Hmmmm – most of cache is now being used by a table I’ve described as ‘unimportant’. Why ? Well, that table was the last to be reindexed…. purely due to luck, as  the reindexing stored procedure performing a loop in alphabetical order through all application tables...  When the application starts to be used again – all this ‘unimportant’ data has to be replaced in cache by data that is heavily used… So, we changed the overnight reindex scripts –  the most heavily accessed tables are now the last to be reindexed. Obvious really, but we did see a significant reduction in early-morning I/O after changing the order of our reindexing.  

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• new project; entire node.js app

  - by Jared

  I have been looking into Node.js, express and Nowjs and love how easy it is to have real time interactions between clients. My background is mostly from CodeIgniter MVC using PHP and MYSql. I want to re make a current web project of mine from scratch to make everything better and more real time with this newer technology. After researching and doing test examples I want to use node.js , express and Nowjs for the real time interactions once someone connects to the socket.io to pull data back to clients. But use Code Igniter for the control of the site and user management , possible shopping cart/store , pretty much everything else. This is purely due to time constraints and that I am already familiar with doing it that way. I have been looking at MongoDB as an alternative to MySql, Basically the app is going to be multiple chat rooms all on one page. with the ability of notifications and private messaging. Lots of data transfer and images. before I started piecing it together I wanted to get people who have already done something similar. My model would use Code Igniter and MySQL to render the page and then connect them onto a node.js server and broadcast using express and nowjs would using a mongoDB be better than mySQL for tons of messages and data being stored or MYSQL? Also does it make since to not make the whole site on Node.js , kinda piece it together like that? I was asked to re post this somewhere else as it was not up to the format for SO, OP from here http://stackoverflow.com/questions/12649469/new-project-need-some-start-up-advice-node-js-app#comment17062924_12649469

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• Minimal slim way to create and run an internal RSS feed

  - by tharkun

  I have the idea to create a very simple tech update feed for internal collaboration in our company. For that I'm looking for the easiest way of writing messages which then get syndicated as RSS feed. Something like a mini blog tool. The simpler the better. Enter title, body and send, all subscribers of the feed get the new message. Sort of like Twitter without using Twitter. [edit]It has to be a purely web based solution![/edit] Any tips, ideas, experiences?

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• First languages with generic programming support

  - by oluies

  Which was the first language with generic programming support, and what was the first major staticly typed language (widely used) with generics support. Generics implement the concept of parameterized types to allow for multiple types. The term generic means "pertaining to or appropriate to large groups of classes." I have seen the following mentions of "first": First-order parametric polymorphism is now a standard element of statically typed programming languages. Starting with System F [20,42] and functional programming lan- guages, the constructs have found their way into mainstream languages such as Java and C#. In these languages, first-order parametric polymorphism is usually called generics. From "Generics of a Higher Kind", Adriaan Moors, Frank Piessens, and Martin Odersky Generic programming is a style of computer programming in which algorithms are written in terms of to-be-specified-later types that are then instantiated when needed for specific types provided as parameters. This approach, pioneered by Ada in 1983 From Wikipedia Generic Programming

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• Is there a process-oriented IDE ?

  - by Raveline

  My problem is simple : when I'm programming in an OO paradigm, I'm often having part of a main business process divided in many classes. Which means, if I want to examine the whole functional chain that leads to the output, for debugging or for optimization research, it can be a bit painful. So I was wondering : is there an IDE that let you put a "process tag" on functions coming from different objects, and give you a view of all those functions having the same tag ? edit : To give an example (that I'm making up completely, sorry if it doesn't sound very realistic). Let's say we have the following business process for a HR application : receive a holiday-request by an employee, check the validity of the request, then give an alert to his boss ("one of those lazy programmer wants another day off"); at the same time, let's say the boss will want to have a table of all employee's timetable during the time the employee wants his vacations; then handle the answer of the boss, send a nice little mail to the employee ("No way, lazy bones"). Even if we get rid of everything not purely business-related (mail sending process, db handling to get the useful info, GUI functionalities, and so on), we still have something that doesn't really fit in "one class". I'd like to have an IDE that would give me the opportunity to embrace quickly, at the very least : The function handling the validation of the request by the employee; The function preparing the "timetable" for the boss; The function handling the validation of the request by the boss; I wouldn't put all those functions in the same class (but perhaps that's my mistake ?). This is where my dreamed IDE could be helpful.

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• Will Unity allow users to change the color/appearance of the top-Panel?

  - by Sam

  I'm very excited by the functional design principles and keyboard shortcuts that are being implemented for Unity. And function of use is more important to me than looks. However, after experiencing the aesthetic beauty of the display of the top panel in gnome-shell, I was wondering if users would be able to alter the color of Unity's top panel? IMHO it does not look as good as the gnome-shell implementation (or mac OS X/iPad). I think if an alternate color/appearance were chosen for the panel, it would make a big difference aesthetically. Is there a way to make it Black like gnome-shell? Or are the color choices limited to theme-designs as pointed out in this answer? For efficiency and clarity, the Panel should be better differentiated from application controls. The panel should be a different color because it has a "constant (always present) state," unlike application controls. For contrast and easy-recognition, I would like to make the Panel black (like gnome-shell) but make the application controls (e.g., those of Firefox) "Inverted"

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• Have you ever used a non mainstream language in a project? Why?

  - by EpsilonVector

  I was thinking about my academic experience with Smalltalk (well, Squeak) a while ago and whether I would like to use it for something, and it got me thinking: sure, it's as good and capable as any popular language, and it has some nice ideas, but there are certain languages that are already well entrenched in certain niches of programming (C is for systems programming, Java is for portability, and so on...), and Smalltalk and co. don't seem to have any obvious differentiating features to make them the right choice under certain circumstances, or at least not as far as I can tell, and when you add to it the fact that it's harder to find programmers who know it it adds all sorts of other problems for the organization itself. So if you ever worked on a project where a non-mainstream language (like Smalltalk) was used over a more mainstream one, what was the reason for it? To clarify: I'd like to focus this on imperative languages, since other paradigms like functional and logic programming language, while not necessarily mainstream, can still be good choices for certain projects for obvious reasons.

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• Dual Boot Ubuntu 12.04 on a Thinkpad T420 but keep recovery partition

  - by The PC Samurai

  I have a Thinkpad T420 which runs on Windows 7 Pro and I would like to install Ubuntu 12.04 on it via Dual Boot. But the thing is, I'd like to keep the Thinkvantage Recovery Partition. I've been researching and found this: Install Ubuntu on ThinkPad, recovery section must remain intact and http://www.thinkwiki.org/wiki/Rescue_and_Recovery But the information doesn't seem to be updated for for my situation (the second link indicates that it won't work with Windows 7). Just wonderin' if anyone already has experience doing this? I could create recovery CD/DVD's but I'll be more happy i can keep recovery partition and boot information on the hard drive functional (for future resale purposes). Any Ideas?

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• Acceptable GC frequency for a SlimDX/Windows/.NET game?

  - by Rei Miyasaka

  I understand that the Windows GC is much better than the Xbox/WP7 GC, being that it's generational and multithreaded -- so I don't need to worry quite as much about avoiding memory allocation. SlimDX even has some unavoidable functions that generate some amount of garbage (specifically, MapSubresource creates DataBoxes), yet people don't seem to be too upset about it. I'd like to use some functional paradigms to write my code too, which also means creating objects like closures and monads. I know premature optimization isn't a good thing, but are there rules of thumb or metrics that I can follow to know whether I need to cut down on allocations? Is, say, one gen 0 GC per frame too much? One thing that has me stumped is object promotions. Gen 0 GCs will supposedly finish within a millisecond or two, but if I'm understanding correctly, it's the gen 1 and 2 promotions that start to hurt. I'm not too sure how I can predict/prevent these.

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• ASL Sourcing and Advanced Pricing in Procurement

  - by Annemarie Provisero

  ADVISOR WEBCAST: ASL Sourcing and Advanced Pricing in Procurement PRODUCT FAMILY: EBS - Procurement December 6, 2011 at 2:00 pm London, 4:00 pm Egypt, 9:00 am ET, 7:00 am MT, 06:00 am PT This one-hour session is recommended for technical and functional users who would like to know how to implement sourcing in Oracle Purchasing and how the purchasing professionals can define complex pricing structures using the functionality available with Oracle Advanced Pricing. TOPICS WILL INCLUDE: Sourcing introduction Setup steps Demo for sourcing How to troubleshoot issues related to sourcing Advanced pricing introduction and its integration with oracle Purchasing Setup steps Demo for advanced pricing Q/A A short, live demonstration (only if applicable) and question and answer period will be included. Oracle Advisor Webcasts are dedicated to building your awareness around our products and services. This session does not replace offerings from Oracle Global Support Services. Click here to register for this session ------------------------------------------------------------------------------------------------------------- The above webcast is a service of the E-Business Suite Communities in My Oracle Support. For more information on other webcasts, please reference the Oracle Advisor Webcast Schedule.Click here to visit the E-Business Communities in My Oracle Support Note that all links require access to My Oracle Support.

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• What is a good use case for scala?

  - by Usman Ismail

  In a current project we have setup the build so that we could mix Java and Scala. I would like to use more Scala in our code base to make the code more readable and concise. In the process also learn the language by handing over real features. So I plan to use Scala for some classes to showcase its benefits and convince other devs to look into using Scala too. For a rest based web server or a program in general what kind of code structures lend themselves to Scala's functional programming style.

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• EBS Procurement - Approval Workflow

  - by Annemarie Provisero

  ADVISOR WEBCAST:  Approval Workflow PRODUCT FAMILY: EBS Procurement    February 15, 2011 at 14:00 UK Time, 9:00 am ET, 4:00 pm, Egypt Standard Time, 7:30 pm, India Time This one-hour session is recommended for technical and functional users who would like to know about APPROVAL WORKFLOW TROUBLESHOOTING. TOPICS WILL INCLUDE: Introduction Purchasing Approval Basics How to See the Workflow for a Purchasing Document Advanced Troubleshooting Helpful My Oracle Support Notes Conclusion A short, live demonstration (only if applicable) and question and answer period will be included. Oracle Advisor Webcasts are dedicated to building your awareness around our products and services. This session does not replace offerings from Oracle Global Support Services.  Click here to register for this session ------------------------------------------------------------------------------------------------------------- The above webcast is a service of the E-Business Suite Communities in My Oracle Support.For more information on other webcasts, please reference the Oracle Advisor Webcast Schedule.Click here to visit the E-Business Communities in My Oracle Support Note that all links require access to My Oracle Support.

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• how protect intellectual property when oursourcing software development?

  - by gkdsp

  I'm a small company needing to outsource software development. I've written both functional and technical specifications for GUI developers and back-end (C or PHP) developers to implement my software application. I'm a little nervous handing over copies of these documents to request bids from numerous companies. Looking for recommendations to protect my work while outsourcing. What's the conventional wisdom? Is there generic NDA someone could send me a link to. How do others handle this situation. What would the outsource companies expect, or not expect, from me?

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• Prefer algorithms to hand-written loops?

  - by FredOverflow

  Which of the following to you find more readable? The hand-written loop: for (std::vector<Foo>::const_iterator it = vec.begin(); it != vec.end(); ++it) { bar.process(*it); } Or the algorithm invocation: #include <algorithm> #include <functional> std::for_each(vec.begin(), vec.end(), std::bind1st(std::mem_fun_ref(&Bar::process), bar)); I wonder if std::for_each is really worth it, given such a simple example already requires so much code. What are your thoughts on this matter?

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• null values vs "empty" singleton for optional fields

  - by Uko

  First of all I'm developing a parser for an XML-based format for 3D graphics called XGL. But this question can be applied to any situation when you have fields in your class that are optional i.e. the value of this field can be missing. As I was taking a Scala course on coursera there was an interesting pattern when you create an abstract class with all the methods you need and then create a normal fully functional subclass and an "empty" singleton subclass that always returns false for isEmpty method and throws exceptions for the other ones. So my question is: is it better to just assign null if the optional field's value is missing or make a hierarchy described above and assign it an empty singleton implementation?

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• Historical origins of Scala implicits

  - by Frank

  Scala has been called complex with its rich feature set by many of my colleagues and some even blamed all those new features of it. While most programmers are aware of the OO-features, and at least the decent ones also know about functional programming, there is one feature in particular in Scala for which I am not aware of its historical origins. Given that a major mantra of our profession is to not reinvent the wheel, I am rather confident, that Scala does not have any actual unheard-of-before features, but I stand to be corrected on this one if necessary. To get to the actual question, while I am aware of the origins of most of Scala's features I have never seen something like its implicit declarations before. Are there other (older!) languages out there which also provide this feature? Does it make sense to distinguish the different cases of implicits (as they may originate from different sources), namely implict conversions and implicit parameters?

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• Thread safe GUI programming

  - by James

  I have been programming Java with swing for a couple of years now, and always accepted that GUI interactions had to happen on the Event Dispatch Thread. I recently started to use GTK+ for C applications and was unsurprised to find that GUI interactions had to be called on gtk_main. Similarly, I looked at SWT to see in what ways it was different to Swing and to see if it was worth using, and again found the UI thread idea, and I am sure that these 3 are not the only toolkits to use this model. I was wondering if there is a reason for this design i.e. what is the reason for keeping UI modifications isolated to a single thread. I can see why some modifications may cause issues (like modifying a list while it is being drawn), but I do not see why these concerns pass on to the user of the API. Is there a limit imposed by an operating system? Is there a good reason these concerns are not 'hidden' (i.e. some form of synchronization that is invisible to the user)? Is there any (even purely conceptual) way of creating a thread safe graphics library, or is such a thing actually impossible? I found this http://blogs.operationaldynamics.com/andrew/software/gnome-desktop/gtk-thread-awareness which seems to describe GTK differently to how I understood it (although my understanding was the same as many people's) How does this differ to other toolkits? Is it possible to implement this in Swing (as the EDT model does not actually prevent access from other threads, it just often leads to Exceptions)

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• Software centre and Evolution think I am offline using WICD to make wireless connection

  - by Alex

  I upgraded to 11.10 yesterday. I use WICD to make the wireless connection because I have never managed to get network manager to make a wireless connection on any computer I have installed it on. But since 11.10 both Evolution and software centre are convinced I am offline even though I have a functional connection (I am using wifi now and both are reporting me offline, which I clearly am not). I am using an MSI WIND clone Advent 4211 B netbook. Network manager has never worked on this computer for wifi. WICD can make connection about 30% time (often returns BAD PASSWORD, first few attempts). XP of course works fine to make wifi connection. I have a I am happy to supply more information I just do not know what information might help. I have reported a bug against evolution

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• Connecting FreeNAS 8 to Mac OS X Lion LDAP Server

  - by Absolution

  I currently have Mac OS X Lion Server running from a MacMini and want to use it purely as an LDAP server for authentication for FreeNAS 8. I have FreeNAS setup and running on a VM, all features working correctly and as expected however I cannot connect to my LDAP server (MacMini). Error message; **Nss_ldap: could not search LDAP server – server is unavailable** For LDAP service settings in FreeNAS, I know my Hostname and Base DN are correct (exact copies of what I set originally and ones that are shown in server:open directory overview) however I am unsure what to enter for Root bind DN, password and Suffix’s. I have researched into where I can find these out and other than following the FreeNAS examples it appears there is a way to find out within the Server Workgroup Manager specific to my settings – however this function is unavailable to me and cannot be ‘ticked’ to view for some strange reason. Some forums explain how Root bind DN should be uid=admin, dc=… and others cn=admin, dc=… – I’m rather confused and would appreciate your help or advice with this.

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• Graphics system failure

  - by anonymous coward

  I just upgraded two versions of Ubuntu to Oneiric after a recent set of updates broke Audacious 2.4.something in Maverick for me. When it was all finished my Asus Eee 1215N with the 1366x768 screen and the notoriously unsupported Nvidia Ion2 Optimus chipset was working on minimum compatibility fallbacks at 1024x768 resolution. So I did a little bit of reading (not enough) and tried deleting a couple parts of the graphics system to see if I could force a retry on the autodetection. The result: No graphical shell works now. Attempted so far: -reinstalling xorg/nouveau, didn't work. -installing bumblebee/nvidia-current, didn't work. -sudo dpkg-reconfigure -phigh -a, didn't work. I'd like to stress that this is otherwise a perfectly functional installation that I had spent some time setting up already (including a successful compile of Audacious 3.21 that was working with all the plugins). Is there a way for me to rebuild the graphics system from scratch or should I just give up, cry a little, backup data, wipe partition and reinstall with a USB drive?

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