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• Declarative Transactions in Node.js

  - by James Kingsbery

  Back in the day, it was common to manage database transactions in Java by writing code that did it. Something like this: Transaction tx = session.startTransaction(); ... try { tx.commit(); } catch (SomeException e){ tx.rollback(); } at the beginning and end of every method. This had some obvious problems - it's redundant, hides the intent of what's happening, etc. So, along came annotation-driven transactions: @Transaction public SomeResultObj getResult(...){ ... } Is there any support for declarative transaction management in node.js?

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• Active Directory Replication across Sites slow or not working

  - by neildeadman

  I've just inherited (isn't it always the way!) a Windows Domain. The domain is spread across 2 sites. Site01 has 3 DCs & Site02 has 2 DCs. If I create a user in either site, the other DCs in that site, immediately replicate and show the new user. The new user is not shown in the other site though. If I manually run the following command, everything syncs and the new user appears: repadmin /syncall issdc01 /APed In the Inter-Site Transports DEFAULTIPSITELINK the replicate every time value is set to 180 minutes. I thought this was the solution, but on another Windows Domain, this is the same, but replication takes place across sites immediately. What can I check to resolve this issue? We are running Windows Server 2008 Results of dcdiag /test:dns show a server that is no longer part of our domain: TEST: Delegations (Del) Error: DNS server: oldserver.win.domain.com IP: [Missing glue A record]

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• How do you manage updates without a staging environment: CentOS 6.3

  - by Gregg Leventhal

  I am managing about 20 servers, many of them virtual. They are almost all different purpose, and none are clustered. I have a distributed LAMP stack, a few application servers, some build servers, a few KVM hosts. They are CentOS 6.3 mostly with a few Ubuntu (unfortunately). I don't have the resources to setup a staging environment where I can have duplicates of my machines and test updates before rolling them out. I am taking file backups. What I want to know is how you are approaching backing up your Linux systems. I assume you don't just do yum update, but then how are you choosing the packages worthy of updating? When (if ever) are you updating the kernel, etc.. How do you test updates without a staging environment? Snapshot and hope for the best?

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• When module calling gets ugly

  - by Pete

  Has this ever happened to you? You've got a suite of well designed, single-responsibility modules, covered by unit tests. In any higher-level function you code, you are (95% of the code) simply taking output from one module and passing it as input to the next. Then, you notice this higher-level function has turned into a 100+ line script with multiple responsibilities. Here is the problem. It is difficult (impossible) to test that script. At least, it seems so. Do you agree? In my current project, all of the bugs came from this script. Further detail: each script represents a unique solution, or algorithm, formed by using different modules in different ways. Question: how can you remedy this situation? Knee-jerk answer: break the script up into single-responsibility modules. Comment on knee-jerk answer: it already is! Best answer I can come up with so far: create higher-level connector objects which "wire" modules together in particular ways (take output from one module, feed it as input to another module). Thus if our script was: FooInput fooIn = new FooInput(1, 2); FooOutput fooOutput = fooModule(fooIn); Double runtimevalue = getsomething(fooOutput.whatever); BarInput barIn = new BarInput( runtimevalue, fooOutput.someOtherValue); BarOutput barOut = barModule(BarIn); It would become with a connector: FooBarConnectionAlgo fooBarConnector = new fooBarConnector(fooModule, barModule); FooInput fooIn = new FooInput(1, 2); BarOutput barOut = fooBarConnector(fooIn); So the advantage is, besides hiding some code and making things clearer, we can test FooBarConnectionAlgo. I'm sure this situation comes up a lot. What do you do?

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• Testing of visualization projects

  - by paxRoman

  We develop small to large visualization projects for different tasks and industries and sometimes while rewriting them a couple of times in the process we hit walls because we discover that we need to add a lot of code to support new requirements. Now we have established a design process that seems to work well (at least we reduced the development time for each new project quite a bit), but we're still left scratching our heads around this question: what exactly should we test when testing visualizations? If everything that we want to explore is on the screen (bounded visualizations)? If the data is ok - if data is valid (that's one of the nice things about visualizations you can spot errors in your datasets)? Usability? User interaction? Code quality? I can tell you for sure that a simple check of the code quality is certainly not enough! Is there a classic paper / book about how to test visualizations? Also do you happen to know about classic design patterns for visualizations (except the obvious ones like Pub-Sub)?

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• When writing tests for a Wordpress plugin, should i run them inside wordpress or in a normal browser?

  - by Nicola Peluchetti

  I have started using BDD for a wordpress plugin i'm working on and i'm rewriting the js codebase to do tests. I've encountered a few problems but i'm going steady now, i was wondering if i had the right approach, because i'm writing test that should pass in a normal browser environment and not inside wordpress. I choose to do this because i want my plugin to be totally indipendent from the wordpress environment, i'm using requirejs in a way that i don't expose any globals and i'm loading my version of jQuery that doesn't override the one that ships with Wordpress. In this way my plugin would work the same on every wordpress version and my code would not break if they cheange the jQuery version or someone use my plugin on an old wordpress version. I wonder if this is the right approach or if i should always test inside the environment i'm working in. Since wordpress implies some globals i had to write some function purely for testing purpose, like "get_ajax_url": function() { if( typeof window.ajaxurl === "undefined" ) { return "http://localhost/wordpress/wp-admin/admin-ajax.php"; } else { return window.ajaxurl; } }, but apart from that i got everything working right. What do you think?

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• How would I pursue a track in front-end web development?

  - by Koviko

  I've recently been put on heavy JavaScript projects and have become fond of the front-end world in comparison to the back-end. I have always been good at proper markup and CSS, and coupled with AJAX, pretty animations, and dynamically generated content, it's become a much more interesting and flashy world for me. I would like to be able to continue to hone my craft in the same way that I was able to become proficient at back-end development with PHP: getting paid to do it. How would I market myself as a front-end web developer with a strong interest in dynamic JavaScript-driven websites? Due to my strong background in back-end development, how would I find the companies that wouldn't waste my front-end skill set on simple HTML/CSS development? And as a bonus, how would I apply this to being a contractor/freelance developer rather than a salaried employee? While I like the idea of being able to remain a part of my creations, I also dislike the maintenance phase of projects.

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• How do you save/export changes made in Firebug?

  - by blunders

  Using Firebug to edit CSS, how do I save/export changes made to the CSS? TOOLS: Firefox, Firebug MAJOR UPDATE: If you know of a way to lock the forward/back/refresh on a FireFox tab, please let me know. Otherwise, I've given up on using FireBug/FireDiff as an IDE for CSS, it's nice, but lol... press backspace at the wrong time and ALL your work is gone... funny. So, really like the browser highlighting to CSS/HTML in Firebug. Know any good CSS editors that do this? Really had hope FireBug would work, but for now only see it as being good for ad-hoc inspection and test; meaning using it for what it's made for. UPDATES: @Lèse majesté: Just as an update, "Web Developer add-on" does let you edit CSS, but it does not let you edit/save CSS changes made by Firebug. Meaning you use Firebug to ID and maybe test changes, but it does not let you save the changes from Firebug. Here's a "how to" covering how to use them together: FF + FB + WD @Lèse majesté: Still playing around with FireDiff. It works okay, found one bug already (although I'm just working around it), and there's no "how to" I've been able to find, so I'm just trying every feature and clicking around... (for example, to export a diff you must be over the last item in the list, right click, and select as "Save Diff". The ".diff" is just a text file, no idea why at this point the ext is .diff.

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• WPF Release History : Q2 2010 Beta (version 2010.1.0609)

  Q2 2010 Beta New Controls: RadTreeListView As you have probably already noticed we started a major new initiative for completely re-writing the TreeListView control. Our first attempt (back in 2009) proved that our users are mostly interested in a TreeListView control that is based on the GridView control rather then the TreeView. Therefore, we decided to completely rebuild the control and the result is that the TreeListView now combines the powerful data-driven features from RadGridView with...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Cross-Forest Trust

  - by cdalley

  I am looking at testing a cross-domain trust we can have two domain controllers (with different forests and domain names) setup so we can move everyone onto the new domain. We do NOT run exchange on site and we do not have any links to O365 to AD currently. Onto the problem: I have setup two DCs in a Virtual Machine: They are on the same network 192.168.0.* The Windows 2003 server: Name: OLDSRVR "Clone" of our current Domain Controller IP: 192.168.0.1 Domain: internal.test.com The Windows 2012 server: Name: ADCTEST01 Brand new domain setup from scratch separate to internal.test.com Domain: internal.test2.com IP: 192.168.0.2 OLDSRVR can only see ADCTEST if it has dynamic IP set. If I set a static IP it cannot see it. If I try using the dynamic IP and try to join it gets to the end then complains "??The trust relationship between this workstation and the primary domain failed" Any ideas?

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• Weblogic Threads Usage

  - by Hila

  I have an application deployed on WebLogic 10.3, which exhibits a strange behavior. I am running a constant (not too high) load on my application (20 concurrent users, running a light activity). The response time is reasonable (well below 100ms after the application stabilizes) Memory consumption seems fine (My application creates a lot of short-living objects, but they are garbaged collected so the overall memory consumption stays under 500 mb). Threads stats seem healthy as well: And yet, after I leave my test running for a while, more and more execute threads ("[ACTIVE] ExecuteThread: '3' for queue: 'weblogic.kernel.Default (self-tuning)'") are created, until eventually the application crashes: This test hasn't been running for a long time (All the new threads that you don't see in the first screenshot were created while I was writing this question), and I've seen much more threads being created. Any idea why these threads are being created?

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• What significant progress have we made in Rapid Application Development?

  - by Frank Computer

  Since the introduction of OOPL's and event-driven programming, I feel like developing an application has become harder and more tedious, when it should have been the other way around! We should have development tools which can generate prototype apps which can be quickly and easily customized into sophisticated applications, even by novice users! We really need new ideas in this area of software development and I would like to know of any good ideas. If we can't really find them, then we should ask "Where did we miss the boat?.. Why?.. and What should we be doing?"

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• Hiera concatenated lookup from yaml

  - by Brian

  I am trying to configure the puppet-logstash module via Hiera. When I make the call to hiera('profiles::logstash::config'), the return value is a concatenated string. It tells me that it cannot convert a String into a hash. shipper.pp class profiles::logstash::shipper() { $shipper_config = hiera('profiles::logstash::config') notice("${shipper_config}") class { 'logstash': ensure => 'present', version => '1.4.1-1_bd507eb', status => 'enabled', } profiles::logstash::config { $shipper_config: } include logstash } hostname.yaml classes: - os::repo - profiles::logstash::shipper profiles::logstash::config: - {content: this is a test, order: 10} Output when used with notice(): order10contentthis is a test Did I order my YAML wrong?

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• Strategy for versioning on a public repo

  - by biril

  Suppose I'm developing a (javascript) library which is hosted on a public repo (e.g. github). My aim in terms of how version numbers are assigned and incremented is to follow the guidelines of semantic versioning. Now, there's a number of files in my project which compose the actual lib and a number of files that 'support it', the latter being docs, a test suite, etc. My perspective this far has been that version numbers should only apply to the actual lib - not the project as a whole - since the lib alone is 'the unit' that defines the public API. However I'm not satisfied with this approach as, for example, a fix in the test suite constitutes an 'improvement' in my project, which will not be reflected in the version number (or the docs which contain a reference to it). On a more practical level, various tools, such as package managers, may (understandably) not play along with this strategy. For example, when trying to publish a change which is not reflected in the version number, npm publish fails with the suggestion "Bump the 'version' field set the --force flag, or npm unpublish". Am I doing it wrong?

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• Enablement 2.0 Get Specialized!

  - by mseika

  Enablement 2.0 Get Specialized! The Oracle PartnerNetwork Specialized program is releasing new certifications on our latest products, and partners are invited to be the first candidates to get certified. Oracle's Certified Exams go through a rigorous review process called a "beta period". Here are a few advantages of taking a Beta Exam: Certification exams taken during the beta period count towards company Specializations. Most new Certified Specialist Exams have no training requirement. Beta Exams Vouchers are available in limited quantity, so request a voucher today by contacting the Partner Enablement Team and act fast to reserve your test from the list below. FREE Certification Testing Are you attending OPN Exchange @ OpenWorld? Then join us at OPN Specialist Test Fest! October 1st - 4th 2012, Marriott Marquis Hotel Pre-register now! Beta testing period will end on October, 6th, 2012 for the following exams: Oracle E-Business Suite R12 Project Essentials (1Z1-511) Beta testing period will end on October, 13th, 2012 for the following exams: Oracle Hyperion Data Relationship Management Essentials (1Z1-588) Beta testing period will end on November, 17th, 2012 for the following exams: Oracle Global Trade Management 6 Essentials (1Z1-589) Exams Coming Soon in Beta Oracle Fusion Distributed Order Orchestration Essentials Exam (1Z1-469) Take the exam(s) now at a near-by Pearson VUE testing center! Contact Us Please direct any inquiries you may have to the Oracle Partner Enablement team at [email protected] For More Information Oracle Certification Program Beta Exams OPN Certified Specialist Exam Study Guides OPN Certified Specialist FAQ

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• Enablement 2.0 Get Specialized!

  - by mseika

  Enablement 2.0 Get Specialized! The Oracle PartnerNetwork Specialized program is releasing new certifications on our latest products, and partners are invited to be the first candidates to get certified. Oracle's Certified Exams go through a rigorous review process called a "beta period". Here are a few advantages of taking a Beta Exam: Certification exams taken during the beta period count towards company Specializations. Most new Certified Specialist Exams have no training requirement. Beta Exams Vouchers are available in limited quantity, so request a voucher today by contacting the Partner Enablement Team and act fast to reserve your test from the list below. FREE Certification Testing Are you attending OPN Exchange @ OpenWorld? Then join us at OPN Specialist Test Fest! October 1st - 4th 2012, Marriott Marquis Hotel Pre-register now! Beta testing period will end on October, 6th, 2012 for the following exams: Oracle E-Business Suite R12 Project Essentials (1Z1-511) Beta testing period will end on October, 13th, 2012 for the following exams: Oracle Hyperion Data Relationship Management Essentials (1Z1-588) Beta testing period will end on November, 17th, 2012 for the following exams: Oracle Global Trade Management 6 Essentials (1Z1-589) Exams Coming Soon in Beta Oracle Fusion Distributed Order Orchestration Essentials Exam (1Z1-469) Take the exam(s) now at a near-by Pearson VUE testing center! Contact Us Please direct any inquiries you may have to the Oracle Partner Enablement team at [email protected] For More Information Oracle Certification Program Beta Exams OPN Certified Specialist Exam Study Guides OPN Certified Specialist FAQ

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• Enablement 2.0 Get Specialized!

  - by mseika

  Enablement 2.0 Get Specialized! The Oracle PartnerNetwork Specialized program is releasing new certifications on our latest products, and partners are invited to be the first candidates to get certified. Oracle's Certified Exams go through a rigorous review process called a "beta period". Here are a few advantages of taking a Beta Exam: Certification exams taken during the beta period count towards company Specializations. Most new Certified Specialist Exams have no training requirement. Beta Exams Vouchers are available in limited quantity, so request a voucher today by contacting the Partner Enablement Team and act fast to reserve your test from the list below. FREE Certification Testing Are you attending OPN Exchange @ OpenWorld? Then join us at OPN Specialist Test Fest! October 1st - 4th 2012, Marriott Marquis Hotel Pre-register now! Beta testing period will end on October, 6th, 2012 for the following exams: Oracle E-Business Suite R12 Project Essentials (1Z1-511) Beta testing period will end on October, 13th, 2012 for the following exams: Oracle Hyperion Data Relationship Management Essentials (1Z1-588) Beta testing period will end on November, 17th, 2012 for the following exams: Oracle Global Trade Management 6 Essentials (1Z1-589) Exams Coming Soon in Beta Oracle Fusion Distributed Order Orchestration Essentials Exam (1Z1-469) Take the exam(s) now at a near-by Pearson VUE testing center! Contact Us Please direct any inquiries you may have to the Oracle Partner Enablement team at [email protected] For More Information Oracle Certification Program Beta Exams OPN Certified Specialist Exam Study Guides OPN Certified Specialist FAQ

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• Enablement 2.0 Get Specialized!

  - by mseika

  Enablement 2.0 Get Specialized! The Oracle PartnerNetwork Specialized program is releasing new certifications on our latest products, and partners are invited to be the first candidates to get certified. Oracle's Certified Exams go through a rigorous review process called a "beta period". Here are a few advantages of taking a Beta Exam: Certification exams taken during the beta period count towards company Specializations. Most new Certified Specialist Exams have no training requirement. Beta Exams Vouchers are available in limited quantity, so request a voucher today by contacting the Partner Enablement Team and act fast to reserve your test from the list below. FREE Certification Testing Are you attending OPN Exchange @ OpenWorld? Then join us at OPN Specialist Test Fest! October 1st - 4th 2012, Marriott Marquis Hotel Pre-register now! Beta testing period will end on October, 6th, 2012 for the following exams: Oracle E-Business Suite R12 Project Essentials (1Z1-511) Beta testing period will end on October, 13th, 2012 for the following exams: Oracle Hyperion Data Relationship Management Essentials (1Z1-588) Beta testing period will end on November, 17th, 2012 for the following exams: Oracle Global Trade Management 6 Essentials (1Z1-589) Exams Coming Soon in Beta Oracle Fusion Distributed Order Orchestration Essentials Exam (1Z1-469) Take the exam(s) now at a near-by Pearson VUE testing center! Contact Us Please direct any inquiries you may have to the Oracle Partner Enablement team at [email protected] For More Information Oracle Certification Program Beta Exams OPN Certified Specialist Exam Study Guides OPN Certified Specialist FAQ

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• Configure SMTP server windows

  - by Jake

  I am configuring a local network and for some reason I can't get server to send an email. I already install the SMTP server and configured using this tutorial http://www.itsolutionskb.com/2008/11/installing-and-configuring-windows-server-2008-smtp-server/ but when I try to send an email using code, the email gets pickedup from mailroot/pickup and dropped in mailroot/queue and stays in queue forever, it never goes anywhere, I even tried dropping a basic mail.txt file with this in it: to:[email protected] from:[email protected] subject:This is a test. this is a test. still the same thing happens. Is the smtp server not configured right, is their something else I am missing, because this is my first time setting up an smtp server

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• create vmware virtual machine via command line on linux system

  - by tom smith

  evaluating/investigating vmware, and how you create a "virtual machine" using the command line for rhel/centos. basically, i want to be able to create a test virtual machine and then be able to run the VM on another system using the virtual player. so, i'm looking for pointers/articles/instructions that detail what i need (in terms of tools/apps) and the steps needed to accomplish this. i've seen a few articles/sites that discuss creating virtual machines, but they all involve using the GUI. thanks update:: while vmware is the company. there are different tools/apps provided to create a Virtual Machine. Basically, I want to do a test, to ultimately have a Virtual Machine/Image that can be run on a separate server using the vmplayer app I've seen docs that discuss using the GUI to create the VM, but haven't found any (yet) that discuss how to accomplish this using the command line approach. thanks...

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• PC doesn't power up anymore

  - by Andrew

  I will tell you the story behind the problem. The computer needed to be reinstalled, it has 2 HDDs so I had to un-plug one to see which is which, to save as much data as possible. After unplugging the first one, it booted with the reinstallation CD, it wasn't the HDD I was looking for so I turned it off and unplugged the other one. After unplugging and turning on, right after booting test, the HDD was turned off, only the CPU fan was working. Turned it off with the power supply's button help, holding the power button didn't do it. And now it doesn't want to turn on anymore. I tried with another test power supply but the result is the same, doesn't want to turn on. Any idea?

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• How do you maintain focus when a particular aspect of programming takes 10+ seconds to complete?

  - by Jer

  I have a very difficult time focusing on what I'm doing (programming-wise) when something (compilation, startup time, etc.) takes more than just a few seconds. Anecdotally it seems that threshold is about 10 seconds (and I recall reading about study that said the same thing, though I can't find it now). So what typically happens is I make a change and then run the program to test it. That takes about 30 seconds, so I start reading something else, and before I know it 20 minutes have passed, and then it takes (if I'm lucky!) another 10+ minutes to deal with the context switch to getting back into programming. It's not an exaggeration to say that some things that should take me minutes literally take hours to complete. I'm very curious about what other programmers do to combat this tendency (or if I'm unique and they don't have this tendency?). Suggestions of any type at all are welcome - anything from "sit on your hands after hitting the compile button", to mental tricks, to "if it takes 30 seconds to start up something to test a change, then something's wrong with your development process!"

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• Wake up from sleep with GPIO (I2C)

  - by spambas

  My situation: Ubuntu 10.10 running on an atom driven main board the main board has a GPIO chip integrated (F75111 by Fintek). They communicate through I2C(SMBus). We have a driver running that works, we can send outputs and read inputs. Great! We would like to use the I/O interface to suspend (sleep) and wake up again. Sleep is no problem. On an incoming input: run s2both. Ubuntu goes to sleep and prepares a hibernate state, so when the power-cord is unplugged by accident, it will wake from hibernate. But the big question: how to wake on an input if the OS is already sleeping! You can wake from a lot of devices (lan, usb, ring, etc) but I can't find out how to wake from a I2C card. PLEASE HELP!

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• SEO Benefits of adding a Tumblr feed to site

  - by Paul

  A client of ours has a CMS driven Blog in his hotel site - he would like to use the blog to add depth top his site and add seo benefits relating to the blogs content. The current blog is a basic header / text field and doesn't contain any tagging / meta features. Unfortunately we dont have a .net developer in our team to alter the existing blog and add meta / tagging and there isn't budget to hire one - so I considered using a Tumblr blog - setting it up externally - giving it a blog.hotelname.com address and feeding it into the existing page via tumblrs js - which basically does a document.write into the page - which we can style. I understand from a previous post (Poor CMS blog vs Tumblr embed as a general rule most search engines ignore JS created content - but will the above approach act as an improvement on the existing system for now - as the blog will be setup externally with its own url and also feed into the existing site? Cheers Paul

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• OpenGL doesn't draw (3.3+) [on hold]

  - by Dhiego Magalhães

  Brief: I've been following this tutorial about OpenGL for 2 days, and I still can't have a triangle drawn, so I'm asking for help here. The tutorial is turned to OpenGL version 3.3 programing, using vertex arrays, buffers, etc. The libraries are: GLFW3 and GLEW, and I setted them by myself. The screen keeps black all the time. Full code: link here (It's just like a Hello World opengl program) Further Details: I get no errors at all. I downloaded a software to test my video card, and it supports OpenGL 4.1+ Standard OpenGL code for drawing (from earlier version) such as this one works normally. I'm using Microsoft Visual Studio 10.0 I presume all the OpenGL implementation was dune right: I added Additional Dependences to the linker as glew32.lib, opengl32.lib, glfw3.lib. The glew.dll was placed at SysWOW64 - because I'm running window 64bits, and glew is 32. Notes: I've been working hard to find out what this is, but I can't find. I would appreciate if anyone could test this code for me, so I can know if I implemented something wrong, and that its not my code.

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