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• How can a computer render a CLI/console along with a GUI?

  - by Nathaniel Bennett

  I'm confused when looking into graphics - specifically with operating systems. I mean, how can a computer render a CLI/console along with a GUI? GUI's are completely different from text. And how can we have GUI windows that display text interfaces, ie how can we have CLI in modern Graphics Operating system - that's what I'm mainly trying to grip on to. How does graphics get rendered to display? Is there some sort of memory address that a GPU access which holds all pixel data, and there system's within OS's that gather the pixel position of windows and widgets, along with the Z Index and rasterize them to that memory address, which then the GPU loads to the screen? How about the CLI's integrated with Graphics? How does the OS tell the GPU that a certain part of the screen wants to display text while the rest wants to display pixel data?

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• Why are so many DBCC commands undocumented?

  - by DBA

  Paul Randal of SQLskills.com does a great job of answering the question of why there are so many undocumented DBCC commands in his post Why are so many DBCC commands undocumented? I would like to go on to say that not only does this apply to the DBCC commands but is some respect to all parts of SQL, other Servers, IDE's, Operating Systems, just about everywhere. There is always something that just does not make it into the official documentation. And as Paul points out probably never will make it. That could be why there are so many "Tips & Tricks" types of books, blog post, etc. everywhere you look. And I also agree with Janos's comments on Paul's post, which was "I'm fine with them undocumented. All of us who need to use these commands know where to find "documentation" and whom to ask ". Till later,

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• Why write clean, refactored code?

  - by Shamal Karunarathne

  Hi programming lovers, This is a question I've been asking myself for a long time. Thought of throwing out it to you. From my experience of working on several Java based projects, I've seen tons of codes which we call 'dirty'. The unconventional class/method/field naming, wrong way of handling of exceptions, unnecessarily heavy loops and recursion etc. But the code gives the intended results. Though I hate to see dirty code, it's time taking to clean them up and eventually comes the question of "is it worth? it's giving the desired results so what's the point of cleaning?" In team projects, should there be someone specifically to refactor and check for clean code? Or are there situations where the 'dirty' codes fail to give intended results or make the customers unhappy? Do feel free to comment and reply. And tell me if I'm missing something here. Thanks.

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• LINQ Style preference

  - by Erin

  I have come to use LINQ in my every day programming a lot. In fact, I rarely, if ever, use an explicit loop. I have, however, found that I don't use the SQL like syntax anymore. I just use the extension functions. So rather then saying: from x in y select datatransform where filter I use: x.Where(c => filter).Select(c => datatransform) Which style of LINQ do you prefer and what are others on your team are comfortable with?

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• How to self Motivate technically to put my ideas into execution or just getting a job at MNC like google or microsoft..

  - by Demla Pawan

  I mean, How to self Motivate to get a job at google or create another google in future. ,as there is no mentor who can guide me on this topic, so asked it here: I'm a Graduate in BE IT,but with less grades,with interest in learning new programming languages, but not yet done anything great like developed some system or anything. And I'm left with 2 more years to prove my worth to someone. So,is their a quick guide to start learning a language and then just go on implementing your ideas and it gets appreciated or I get a good Job ant Big MNC's. By the way, I just build one website for my one client and running my wordpress blog. And I had tried my hands on basic of C++,Java,JS,JSP,PHP,Ubuntu,web designing in past.

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• Xubuntu is not seeing my Win8 OS in the installer

  - by Logan Serman

  When I install Xubuntu, I get the message "This computer currently has no detected operating systems. What would you like to do?". I just did a fresh install of Win8 yesterday, and I guess it used EFI because I have a 104MB partition that is of type 'efi'. Is there any way to install Xubuntu next to Win8, and avoid any boot problems? Or can I switch Win8 to BIOS from EFI, without having to re-install Windows? I went through a ton of boot problems and re-installing yesterday... I really don't want to have to do it again.

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• Windows Phone 7 For Silverlight Programmers

    This is the first in a series of mini-tutorials on Windows Phone 7 Programming for Silverlight Programmers. Goals: Rapid introduction to Win Phone 7 for experienced Silverlight Programmers Design and implementation of WP7 Silverlight HVP Audience: Silverlight Programmers who want to learn to program the new Windows Phone 7. Once the fundamentals are covered, the target [...]...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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• Hot-hot-hot for jobs in Java and mobile software

  - by hinkmond

  It's hot-hot-hot! The market for Java and mobile developers keeps growing hotter, and hotter--so says the latest Dice survey. See: Dice survey says Java & Mobile are tops Here's a quote: The market for mobile developers is expanding faster than the talent pool can adapt, a Dice survey indicates. Software developers in general—as well as Java, mobile software and Microsoft .Net developers in particular—are in short supply today. Those fields represent four of the top five most difficult positions IT managers are looking to fill... ... The New York/New Jersey metro area led the country with 8,871 positions listed... So, if you are looking to get into software development get crackin' in learning Java mobile programming and move to NY or NJ. Let's go Mets! Hinkmond

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• How are you using the Managed Extensibility Framework?

  - by dboarman

  I have been working with MEF for about 2 weeks. I started thinking about what MEF is for, researching to find out how to use MEF, and finally implementing a Host with 3 modules. The contracts are proving to be easy to grasp and the modules are easily managed. Although MEF has a very practical use, I am wondering to what extent? I mean, is everyone going to be rewriting existing applications for extensibility? Yes, that sounds, and is insanely impractical. Rhetorically speaking: how is MEF affecting the current trends in programming? have you begun looking for opportunities to use MEF? have you begun planning a major re-write of an existing app that may benefit from extensibility? That said, my questions are: how do I know when I should plan a new project with extensibility? how will I know if an existing project needs to be re-written for extensibility? Is anyone using MEF?

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• Best design for a memory resident tool

  - by Andrew S.

  I apologize if this tends more toward design that programming, but here goes. What design would you recommend for a database that is Memory resident Must run on windows, linux and (at a stretch) the mac Accept multiple queries simultaneously Have minimum overhead, since a search is expected to take <0.25s This program implements a domain-specific search. Think of it as a database, but one that takes advantage of domain specific information to outperform a convential database search (for example, with custom oracle indexing). We have a custom data structure for our data. Our protoype is a simple exe that constructs the database in memory each time it is run. We were thinking that perhaps this program would suffice, but augmented with sockets so it can listen for queries. This database will be static. Its contents will change infrequently. We expect queries, and the solution, to be delivered via a web service.

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• Are There Realistic/Useful Solutions for Source Control for Ladder Logic Programs

  - by Steven A. Lowe

  Version control for ladder logic (LL) programs for programmable logic controllers (PLCs) seems to be virtually non-existent. It may be because LL is a visual language and tends to be stored in binary files, or it may be because source code control hasn't "caught on" in process control engineering circles - or perhaps my Google-Fu is weak tonight. Do you know of any realistic and useful solutions for version control for such systems? Definitions: realistic = changes to the programs are tracked by user and subject to reversion and merges useful = the system integrates with visual LL designers, is not limited to LL from a single PLC manufacturer, and does not cost a ridiculous amount of money? Note: I have heard of people using SVN or Mercurial et al to track the binary files, but I don't think the diff/merge capabilities would display readable differences.

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• CS Concentrations and Career Paths

  - by xbonez

  I'm approaching the end of Sophomore year in college (Studying Computer Science), and very soon I'm going to have to decide on my concentration, but I honestly don't know what each concentration means. I basically have two questions: 1. How much influence does your concentration have on your career path? For example, would a video game development company only look at people with a concentration in Game Development? 2.It would be great if you guys could, in a line or two, tell me what sort of jobs am I looking at for each of the concentrations? I need to pick at least two of the 9 below. - Algorithms and Data Structures - Artificial Intelligence - Computer and Network Society - Computer graphics and vision - Human-Computer Interaction - Game Development and Design - Numeric and Symbolic Computation - Programming languages - Systems

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• How to disable Alert volume from the command line?

  - by Bryce

  There is an option in the Sound Preferences dialog, Sound Effects tab, to toggle Alert volume 'mute'. It works and suffices for my needs to disable the irritating system beep/bell. However, I reinstall systems a LOT for testing purposes and would like to set this setting in a shell script so it's off without having to fiddle with a GUI. But for the life of me I can't seem to find where this can be toggled via a command line tool. I've scanned through gconf-editor, pulseaudio's pacmd, grepped through /etc, even dug through the gnome-volume-control source code, but I am not seeing how this can be set. I gather that gnome-volume-control has changed since a few releases ago. Ideas?

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• What would you say to a bunch of software engineering students on their first day at college?

  - by Álvaro

  Next Friday I'm giving a short (30 min.) talk to a bunch of software engineering students who will be attending the same university I did. Some context: The place is Montevideo, Uruguay The university is Universidad de la República (public, free university) The Software Engineering programme takes 5 years (if you're very good and don't start working early). Around 800 new students per year, around 80 graduates per year. Conditions are harsh, particularly the first two years. Most of them probably have no idea what software engineering or programming is. My goal would be to somehow give them an idea of the field and hopefully motivate them to endure the hardships ahead to eventually become successful developers. So the question is: what would you tell these people?

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• Oracle releases Java Embedded Suite 7.0 for your embedded needs

  - by hinkmond

  Don't you just want Java Embedded Suite 7.0? Don't you just need Java Embedded Suite 7.0? Let me hear you say: "Yeah!" See: Yeah, Java Embedded Suite 7.0! Here's a quote: Oracle today announced Oracle Java Embedded Suite 7.0, a new, packaged offering that facilitates creating applications across a wide range of embedded systems including network appliances, healthcare devices, home gateways and routers... It's all good. If you need Java technology for your embedded device, Java Embedded Suite 7.0 has the goods: Java SE Embedded runtime, Java DB, Glassfish (mini EE server), and Jersey Web Services. Hinkmond

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• How often do CPUs make calculation errors?

  - by veryfoolish

  In Dijkstra's Notes on Structured Programming he talks a lot about the provability of computer programs as abstract entities. As a corollary, he remarks how testing isn't enough. E.g., he points out the fact that it would be impossible to test a multiplication function f(x,y) = x*y for any large values of x and y across the entire ranges of x and y. My question concerns his misc. remarks on "lousy hardware". I know the essay was written in the 1970s when computer hardware was less reliable, but computers still aren't perfect, so they must make calculation mistakes sometimes. Does anybody know how often this happens or if there are any statistics on this?

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• How to explain OOP to a matlab programmer?

  - by Oak

  I have a lot of friends who come from electrical / physical / mechanical engineering background, and are curious about what is "OOP" all about. They all know Matlab quite well, so they do have basic programming background; but they have a very hard time grasping a complex type system which can benefit from the concepts OOP introduces. Can anyone propose a way I can try to explain it to them? I'm just not familiar with Matlab myself, so I'm having troubles finding parallels. I think using simple examples like shapes or animals is a bit too abstract for those engineers. So far I've tried using a Matrix interface vs array-based / sparse / whatever implementations, but that didn't work so well, probably because different matrix types are already well-supported in Matlab.

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• Node.js Or servlets?

  - by Nilesh

  I have heard a lot and read about the Javascript server side language i.e Node.js, and saw many comparisons in favor of Node. I don't understand what makes it better or faster, or how it even relates to something as mature as Java Servlets. But Servlets are built on top of a multithreaded programming language as opposed to Node.js. Then how can node.js be faster? If suppose 1000K users query for a database records, then shouldn't Node.js be slower than Servlets. Also Don't servlets have better security compared to Node.js?

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• I need help with algorithms, how do I improve?

  - by David Burr

  I usually do well at figuring out solutions to programming assignments but for some reason, I'm really struggling in my Algorithms class. I'm not failing but I know I can do better. When I'm confronted with problems like "Divide the array to 2 subarrays so that the sum of each subarray is equal to the other subarray," I feel like my brain won't cooperate and think and I end up not being able to solve it. Some of the things I'm doing right now to help myself: reading CLR (1st ed.) -- it takes a lot of time for stuff to sink in and I can't understand most of it solving some problems -- no matter how much I try, most of the time, I end up googling for the solution before I understand how to solve it I know that good algorithmic skills are very important because lots of good companies ask these sorts of questions in their interview process so I'm a bit worried right now. What else can can I do to improve my algorithmic/problem solving skills? Any advice on how to deal with this?

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• Getting a Conexant CX23885 TV Capture Card working

  - by Benny

  I'm new to Linux, and am trying to get my Capture Card working on 11.04. The only command that I know to run to find out any information is lspci, which tells me that I have 02:00.0 Multimedia video controller: Conexant Systems, Inc. CX23885 PCI Video and Audio Decoder (rev 04) I've looked at using Me TV, but haven't worked out how to configure it for my card, or what I need to do to get it running. I'm not fussed on what software I use to run the Capture Card, but I've currently got only Me TV installed. Edit: When I run tvtime, I get the following errors: videoinput: Cannot open capture device /dev/video0: No such file or directory mixer: find error: Success mixer: Can't open mixer default, mixer volume and mute unavailable. mixer: Can't open device default/Line, mixer volume and mute unavailable. Segmentation fault

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• HRMS Release Update Pack 7 for Release 12.1 - Patch 18004477 Released

  - by DanaD

  We are pleased to announce that Patch 18004477 HRMS Release Update Pack 7 for Release 12.1 was released on May 30, 2014. Please refer to the following notes for more details about 12.1 HRMS RUP7: Doc ID 1645859.1 Oracle Human Resources Management Systems Readme, HRMS Release Update Pack 7 for Release 12.1 Doc ID 1636758.1 Known Issues on Top of Patch 18004477 - R12.HR_PF.B.DELTA.7 Please review the following extremely important patching notes: Doc ID 135266.1 Oracle HRMS Productive Family - Release 11i and Release 12 Doc ID 145837.1 Latest HRMS (HR Global) Legislative Data Patch Available Doc ID 140511.1 How to Install Legislative Data Using Data Installer and hrglobal.drv Doc ID 158275.1 Troubleshooting Guide for HRMS Post Install Steps Doc ID 300097.1 HRGLOBAL Basics Doc ID 276928.1 Requirements for Address Validation with HR Only Installation Doc ID 161818.1 Oracle Database (RDBMS) Releases Support Status Summary

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• Flaws in my PHP development setup - sharing sources causing lags

  - by Wiktor

  I have following development setup for my PHP projects: Working station running on Windows 7 with PhpStorm IDE. GIT for version controlling. CentOS on virtual machine (VirtualBox) with Apache and MySQL (copy of production server). So far, I've been sharing project's source folders between host and guest systems and it was working quite well only really slow. The reason behind this is that Apache was reading files from remote folder (mounted locally). After doing some research, I found out that this set up can be improved by using disk mapping (Samba) instead of folder sharing. So I did that change. I configured my PhpStorm to automatically deploy files to mapped drive. Everything works like a charm now, except for one problem - when I change branches I need to synchronize project's local folder with the one on mapped drive and that takes time, a lot of time (like branching in SVN). Is there another way to handle this than just working on files directly on mapped drive?

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• Distance between two 3D objects' faces

  - by Arthur Gibraltar

  I'm really newbie on programming and I'm making some tests. I couldn't find nowhere on Internet how could I calculate the distance between two 3D objects' faces. Is there anyway? Detailing, as an example, I have two 3D cubes. Each one has a vector3 position designating it's center on the 3D space and an orientation matrix. And each cube has a size (float width, float height and float length). I could get a simple distance between them by calling Vector3.Distance(), but it doesn't consider its sizes, just the position. Then the distance would be between its centers. Is there any way to calculate the distance between the faces? Thanks for any reply.

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• Devs For Wendy

  - by Brian Schroer

  If you’re a developer in the New York City area, please check out Devs For Wendy, benefitting Wendy Friedlander and her family… Wendy is a 30 year old software agilista from Long Island. She's a strong WPF developer and a firm believer in the agile method of development including pair programming and TDD. Wendy is wife and mother of a beautiful girl named Kaylee who will be 2 in August. In August of 2009 Wendy learned that she had a rare and agressive pediatric cancer called aveolar rhabdomyosarcoma. Her treatment consists of high dose chemotherapy and radiation. She has had to leave her job, and her husband has been forced into part time work in order to care for their daughter. Please join us at 7pm on July 7th 2010 for a dinner benefiting Wendy brought to you by the NYC development community. You can also donate via PayPal.

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• OpenGL ES 2.0 example for JOGL

  - by fjdutoit

  I've scoured the internet for the last few hours looking for an example of how to run even the most basic OpenGL ES 2 example using JOGL but "by Jupiter!" it has been a total fail. I tried converting the android example from the OpenGL ES 2.0 Programming Guide examples (and at the same time looking at the WebGL example -- which worked fine) yet without any success. Are there any examples out there? If anyone else wants some extra help regarding this question see this thread on the official Jogamp forum.

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