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  • What are some good, simple examples for queues?

    - by Michael Ekstrand
    I'm teaching CS2 (Java and data structures), and am having some difficulty coming up with good examples to use when teaching queues. The two major applications I use them for are multithreaded message passing (but MT programming is out of scope for the course), and BFS-style algorithms (and I won't be covering graphs until later in the term). I also want to avoid contrived examples. Most things that I think of, if I were actually going to solve them in a single-threaded fashion I would just use a list rather than a queue. I tend to only use queues when processing and discovery are interleaved (e.g. search), or in other special cases like length-limited buffers (e.g. maintaining last N items). To the extent practical, I am trying to teach my students good ways to actually do things in real programs, not just toys to show off a feature. Any suggestions of good, simple algorithms or applications of queues that I can use as examples but that require a minimum of other prior knowledge?

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  • command-line zip not working

    - by ptriek
    I have a Wordpress site on a Debian/Linux dedicated server, with a Backupbuddy plugin for making automatic backups. The plugin, however, gives an error 'Your server does not support command line ZIP'. My knowledge of Linux commands is very limited, but I managed installing zip with the command sudo apt-get install zip However, I still get the same error message. Plugin documentation mentions the problem could also be caused by disabled exec() or safe_mode - but exec isn't disabled, and safe_mode is off. Any ideas what might be causing this, or how to fix it? The only thing I could think of, is it might be caused by wrong permissions?

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  • REGISTER TODAY: Oracle Linux and Oracle VM Virtual SysAdmin Day- July 15

    - by Zeynep Koch
    Are you just starting on Oracle Linux or do you still feel you are missing some knowledge on how to configure, install or patch your Oracle Linux? If you answered yes, this event for you. This is our second virtual sysadmin day for Oracle Linux and it had been hugely popular in the past. This is a hands-on experience for all those Sysadmins that are looking for a great training without leaving their office or home. You will learn to: Install Oracle Linux using RPM and yum repositories; create storage volumes, prepare block devices, work with filesystems Create and mount Btrfs in Oracle Linux, work with block devices and snapshots Come and join us on July 15, 9am-12pm Pacific Time for an informative and interactive session. See more details and register 

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  • how to "think in templates", i.e. how to know that a problem can be solved using templates and how to adapt to it?

    - by sap
    I decided to improve my knowledge of template meta-programming, i know the syntax and rules and been playing with counteless examples from online resources. i understand how powerfull templates can be and how much compile time optimization they can provide but i still cant "think in templates", that is, i cant seem to know by myself if a certain problem could best be solved with templates (instead of something else) and if it can, how to adapt that problem to templates. so what im asking is, is there some kind of online resource or maybe book that teaches how to identify problems that could best be solved with templates and how to adapt that problem. basically i want to learn to "think in templates". already asked on stackoverflow but once again people just redirected me to resources on how to use templates, when im really asking is how to know when to use template meta-programming and how to adapt that problem to templates. thanks in advance.

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  • MammothVPS launches Backups, DNS Management and more!!!

    - by stefan.sedich
    Yesterday we launched a bunch of new features over at MammothVPS, - All VPS' now have an on-site, off-server backup facility available to them. By default all customers will have 1 free weekly backup made available to them, and should you wish to you can purchase more slots which are available in daily, weekly and monthly schedules. - DNS hosting has been made available and will be free for all customers. You can find the new interface in your mPanel. - A cleanup of the menu system has been done to make it easier to navigate around both the site and mPanel. - You will find new sections on site, we now have more information about our services and have included things like a Knowledge Base, which will provide information on howto setup various applications on your VPS. - Added the ability to change the kernel your VPS is running on. So head on over to MammothVPS and check it out.

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  • Implementing lighting similar as in CubeWorld

    - by Phito
    I am currently writing a voxel engine and my goal is to achieve something looking like CubeWorld. The problem that I am encountering is about lighting. I don't have a lot of knowledge in OpenGL but I don't think lighting in a game like that should be done with glLight. But beside that I have no idea of how to implement it. Here's what I have for the moment (with glLight): Do you have any ideas/link that could give me an idea of how to achieve that? Thanks

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  • A Change of Seasons...

    - by James Michael Hare
    As some of you already know, today is my last day at Scottrade. It has been a great place to work and I'll miss all the relationships I've formed over the last 5 years immensely! Starting Monday, I will be taking a new position at Amazon.com in Seattle. It should be an exciting new adventure and I look forward to sharing more about my experiences in the days to come! I do intend to continue blogging (after the move settles down) about C# as I'm able, and may mix in some Java as well as I rekindle (Amazon? Kindle? Get it? Okay, that was lame, I know...) my knowledge of the language for my new job responsibilities. I'll miss all the relationships I've developed with the .NET community in St. Louis and the surrounding area, and hope to come back sometime to participate in future Days of .NET conferences, if able! Stay tuned for more updates!

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  • Review before or after code commit, which is better?

    - by fifth
    Traditionally we performed code review before commit, I had an argument with my colleague today, who preferred code review after commit. First, here's some background, we got some experienced developers and we also got new hires with almost zero programming practice. we'd like to perform fast and short iterations to release our product. we all team members locate at same site. The advantages of code review before commit I've learned, mentor new hires try to prevent errors, failures, bad designs in early developing cycle learn from others knowledge backup if someone quits But I also got some bad experience, like low efficiency, some changes may be reviewed over days hard to balance speed and quality, especially for newbies some guy felt distrust As to post-review, I just knew little about this, but the most thing I worried about is the risk of losing control, people never review. Any opinions?

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  • Tampa Code Camp - October 13, 2012

    - by Nikita Polyakov
    I am pleased to announce Tampa Code Camp 2012 is being co-hosted with Bar Camp Tampa Bay this year in Tampa, FL on October 13th 2012 at USF Main Campus beautiful Business buildings.“CodeCamp is a FREE one-day meeting forum that allows software developers to share their knowledge and experience with Microsoft products and services. It’s similar to Tech-Ed, but community-driven by a group of dedicated volunteers and speakers while financially supported through generous sponsors and local businesses.”As one of the organizers, I will not be speaking, but instead helping MC the Component Vendor ShowDown - a special track dedicated to battling out the best components organized by focus application rather then firm. Check out the ShowDown track in the Agenda.WHEN: Saturday, October 13, 2012, 730AM – 545 PMWHERE: USF - Tampa Campus, 4202 East Fowler Avenue, Tampa, FL 33620REGISTRATION: http://www.tampacodecamp.comCOST: FREE

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  • Back in Atlanta! Wed, Feb 9 2011

    - by KKline
    I always enjoy spending time with my friends from Atlanta, as well as meeting folks and making new friends. If you live in the Atlanta area, I hope you'll join me on the evening of Wednesday, February 9th, 2011. Details are at the Atlanta SQL Server user group website . It's common knowledge that I have a terrible memory for many things. However, one of the few things that my memory is usually really good at is remember names & faces (and remembering stories, but that is another story as well)....(read more)

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  • Profiling and containing memory per system

    - by chadb
    I have been interesting in profiling and keeping a managed memory pool for each subsystem, so I could get statistic on how much memory was being used in something such as sounds or graphics. However, what is the best design for doing this? I was thinking of using multiple allocators and just using one per subsystem, however, that would result in global variables for my allocators (or so it would seem to me). Another approach I have seen/been suggested is to just overload new and pass in an allocator for a parameter. I had a similar question over on stackoverflow here with a bounty, however, it seems as if perhaps I was too vague or just there is not enough people with knowledge in the subject.

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  • Good resources for learning about graphics hardware

    - by Ken
    I'm looking for some good learning resources for graphics hardware (and associated low level software). Basically I want to learn more about what goes on underneath the opengl/direcx API layers in terms of how things are implemented. I familiar with what happens in principle during the various stages of the rendering pipeline (viewing, projection, clipping, rasterization etc). My goal is to be able to make better and more informed decisions about tradeoffs and potential optimisations when graphics/shader programming with respect to the following kinds of issues; batching view culling occlusions draw order avoiding state changes triangles vs pointsprites texture sampling etc Basically whatever the graphics programmer needs to know about modern graphics hardware in order to become more effective. I'm not really looking for specific optimisation techniques, rather I need more general knowledge so that I will naturally write more efficient code.

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  • Education path advice

    - by Miroslav Zadravec
    I'm thinking of continuing my education and going for masters degree. I must decide between two programs. One is CS/IT and focuses on algorithms, math, multimedia, web technologies with optional interesting courses like AI and robotics. Second is about business process management, software architecture and project management. I have some experience in business software and I must say, I never though I need deeper understating of algorithms or program language but I always felt that I'm lacking in project planing or management knowledge. On the other side, CS/IT looks more interesting but what are the chances to find a job that require such skills?

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  • Monitor Display issue

    - by dsiddens
    When booting I will have to boot maybe 3 or 4 times to get a screen that is not displayed diagonally or is not using the full screen width. Hardware specification: HP s7727c with AMD64 and NVIDIA chipsets and Insignia 22" monitor/TV. The Ubuntu version is 9.10 Karmic. I'd like to stay current with Ubuntu on this machine, but have gone down to 9.10 to get this described functioning. I tried higher versions and could not get past the "black screen" I think this issue is connected to the NVIDIA chipset/driver problem. I am a GUI user and I don't follow the other solutions posted which make use of the command line. I suppose if the command line solution could be given without making any assumptions of the receiving person's knowledge base, then even I and others like me, could implement it. Thank you for your time and assistance. Doug

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  • Starting android Development

    - by Tamim Ad Dari
    I am considering learning android development. I have some basic knowledge in C++. I downloaded the ADT plugin and eclipse. Now while starting from http://developers.android.com I see the codes were in XML. So I googled for learning XML. The best site I found was http://www.w3schools.org but there I found that for learning XML I have to learn HTML and CSS. So I learned the basics of HTML and CSS. But, Now I find in that learning java is a must. So can someone give idea about the sequental languages that I should study now? Should I learn php,mysql too. BTW, I have a dream to work in google :p

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  • How is Basic Physics applied in CS/SE?

    - by Wulf
    What basic physics principles do software engineers and/or computer scientists use to help solve specific or common problems? The first one that came to my head was creating a Physics engine for a game; physics is involved, as it requires knowledge of: Forces and Motion: Kinematics, Dynamics, Circular Motion However, I need another example, but haven't come across one that involves basic physics. Please consider the following basic physics (grade 12 level) concepts: Energy and Momentum: Work and Energy, Momentum and Collisions, Gravitational and Celestial Mechanics Electric, Gravitational & Magnetic Field: Electric Charges and Electric Field, Magnetic Fields and Electomagnetism The Wave Nature of Light: Waves and Light, Wave Effects of Light Matter-Energy Interface: Einstein’s Special Theory of Relativity, Waves, Photons and Matter, Radioactivity and Elementary Particles I will be happy with any response; Keywords for google, names of methods like raycasting, etc.

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  • Is it possible to give an animated GIF a transparent background?

    - by Phil
    I'm making a Fire Emblem-esque game. There are very cute 2D frames I made for each character, and, like a game like Fire Emblem, I want these characters to animate constantly. To circumvent the graphics programming involved I came up with a novel idea! I would make each character an animated gif, and only in special conditions ever halt their constant movement - in that case just change what image is being displayed. Simple enough. But I have a dilemma - I want the background of my .gifs to be transparent (so that the "grass" behind each character naturally shows, as per the screenshot - which has them as still images with transparent backgrounds). I know how to make a background transparent in numerous tools (GIMP, Photoshop). But it seems every .gif creator replaces the transparent background with something and I can't edit it back to transparent. Is it possible to have a .gif with a transparent "background"? Perhaps my knowledge of file formats is limiting me here.

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  • How to setup Ubuntu as a backup server for my Windows computer?

    - by derek
    I took my old computer (AMD 5600+, 2GB RAM, 880gt, 250GB SATA, etc) and decided to jump and try Ubuntu for the first time. I have very very little knowledge (Red Hat when I was younger) with Linux in general. My main desktop is Windows 7 and my plan is to use the Ubuntu computer as a file server sort of speak. I want to be able to setup back up schedules from my Windows PC to the Ubuntu PC (plan on leaving this on 24/7 to double as a Seedbox) How do I go on to doing this?

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  • Reasons to use C++ ?

    - by RodH257
    I've read here and in other places that learning C++, C or other low level languages are a must to get a more low level perspective on development. I agree with this, but I find it hard to find a reason to use C++ over C# or similar languages. Most of the work I do is web based, so there's no need for C++ there. Other work is windows based, and most things work fine in C# there, so what sort of situation could I use C++? I don't do any high performance stuff, nor do I create games, mostly business applications. I'm looking for an excuse to expand on my C++ knowledge but I need some motivation other than 'because the internet said I should'.

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  • What are good Software Project Management Texts / Resources?

    - by locster
    I'm looking for ideas and resources pertaining to software project management, specifically resources that I can direct project managers to in order to broaden their knowledge of the subject. So for example an obvious choice here would be The Mythical Man Month - I do think that this would be an appropriate suggested first read for /some/, but not all. Probably for managers that arrive at the job with more of a management background rather than a technical one TMMM might be a bit 'heavy'. I'm looking for similar texts that convey more or less the same messages, but perhaps in a form more appropriate for people from a wide range of backgrounds. Thanks.

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  • Why did the team at LMAX use Java and design the architecture to avoid GC at all cost?

    - by kadaj
    Why did the team at LMAX design the LMAX Disruptor in Java but all their design points to minimizing GC use? If one does not want to have GC run then why use a garbage collected language? Their optimizations, the level of hardware knowledge and the thought they put are just awesome but why Java? I'm not against Java or anything, but why a GC language? Why not use something like D or any other language without GC but allows efficient code? Is it that the team is most familiar with Java or does Java possess some unique advantage that I am not seeing? Say they develop it using D with manual memory management, what would be the difference? They would have to think low level (which they already are), but they can squeeze the best performance out of the system as it's native.

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  • CodePlex Daily Summary for Wednesday, September 05, 2012

    CodePlex Daily Summary for Wednesday, September 05, 2012Popular ReleasesDesktop Google Reader: 1.4.6: Sorting feeds alphabetical is now optional (see preferences window)DotNetNuke® Community Edition CMS: 06.02.03: Major Highlights Fixed issue where mailto: links were not working when sending bulk email Fixed issue where uses did not see friendship relationships Problem is in 6.2, which does not show in the Versions Affected list above. Fixed the issue with cascade deletes in comments in CoreMessaging_Notification Fixed UI issue when using a date fields as a required profile property during user registration Fixed error when running the product in debug mode Fixed visibility issue when...Microsoft Ajax Minifier: Microsoft Ajax Minifier 4.65: Fixed null-reference error in the build task constructor.BLACK ORANGE: HPAD TEXT EDITOR 0.9 Beta: HOW TO RUN THE TEXT EDITOR Download the HPAD ARCHIVED FILES which is in .rar format Extract using Winrar Make sure that extracted files are in the same folder Double-Click on HPAD.exe application fileTelerikMvcGridCustomBindingHelper: Version 1.0.15.247-RC2: TelerikMvcGridCustomBindingHelper 1.0.15.247 RC2 Release notes: This is a RC version (hopefully the last one), please test and report any error or problem you encounter. This release is all about performance and fixes Support: "Or" and "Does Not contain" filter options Improved BooleanSubstitutes, Custom Aggregates and expressions-to-queryover Add EntityFramework examples in ExampleWebApplication Many other improvements and fixes Fix invalid cast on CustomAggregates Support for ...ServiceMon - Extensible Real-time, Service Monitoring Utility: ServiceMon Release 0.9.0.44: Auto-uploaded from build serverJavaScript Grid: Release 09-05-2012: Release 09-05-2012xUnit.net Contrib: xunitcontrib-dotCover 0.6.1 (dotCover 2.1 beta): xunitcontrib release 0.6.1 for dotCover 2.1 beta This release provides a test runner plugin for dotCover 2.1 beta, targetting all versions of xUnit.net. (See the xUnit.net project to download xUnit.net itself.) This release adds support for running xUnit.net tests to dotCover 2.1 beta's Visual Studio plugin. PLEASE NOTE: You do NOT need this if you also have ReSharper and the existing 0.6.1 release installed. DotCover will use ReSharper's test runners if available. This release includes th...B INI Sharp Library: B INI Sharp Library v1.0.0.0 Realsed: The frist realsedActive Forums for DotNetNuke CMS: Active Forums 5.0.0 RC: RC release of Active Forums 5.0.Droid Explorer: Droid Explorer 0.8.8.7 Beta: Bug in the display icon for apk's, will fix with next release Added fallback icon if unable to get the image/icon from the Cloud Service Removed some stale plugins that were either out dated or incomplete. Added handler for *.ab files for restoring backups Added plugin to create device backups Backups stored in %USERPROFILE%\Android Backups\%DEVICE_ID%\ Added custom folder icon for the android backups directory better error handling for installing an apk bug fixes for the Runn...BI System Monitor: v2.1: Data Audits report and supporting SQL, and SSIS package Environment Overview report enhancements, improving the appearance, addition of data audit finding indicators Note: SQL 2012 version coming soon.The Visual Guide for Building Team Foundation Server 2012 Environments: Version 1: --Nearforums - ASP.NET MVC forum engine: Nearforums v8.5: Version 8.5 of Nearforums, the ASP.NET MVC Forum Engine. New features include: Built-in search engine using Lucene.NET Flood control improvements Notifications improvements: sync option and mail body View Roadmap for more details webdeploy package sha1 checksum: 961aff884a9187b6e8a86d68913cdd31f8deaf83WiX Toolset: WiX Toolset v3.6: WiX Toolset v3.6 introduces the Burn bootstrapper/chaining engine and support for Visual Studio 2012 and .NET Framework 4.5. Other minor functionality includes: WixDependencyExtension supports dependency checking among MSI packages. WixFirewallExtension supports more features of Windows Firewall. WixTagExtension supports Software Id Tagging. WixUtilExtension now supports recursive directory deletion. Melt simplifies pure-WiX patching by extracting .msi package content and updating .w...Iveely Search Engine: Iveely Search Engine (0.2.0): ????ISE?0.1.0??,?????,ISE?0.2.0?????????,???????,????????20???follow?ISE,????,??ISE??????????,??????????,?????????,?????????0.2.0??????,??????????。 Iveely Search Engine ?0.2.0?????????“??????????”,??????,?????????,???????,???????????????????,????、????????????。???0.1.0????????????: 1. ??“????” ??。??????????,?????????,???????????????????。??:????????,????????????,??????????????????。??????。 2. ??“????”??。?0.1.0??????,???????,???????????????,?????????????,????????,?0.2.0?,???????...GmailDefaultMaker: GmailDefaultMaker 3.0.0.2: Add QQ Mail BugfixSmart Data Access layer: Smart Data access Layer Ver 3: In this version support executing inline query is added. Check Documentation section for detail.DotNetNuke® Form and List: 06.00.04: DotNetNuke Form and List 06.00.04 Don't forget to backup your installation before upgrade. Changes in 06.00.04 Fix: Sql Scripts for 6.003 missed object qualifiers within stored procedures Fix: added missing resource "cmdCancel.Text" in form.ascx.resx Changes in 06.00.03 Fix: MakeThumbnail was broken if the application pool was configured to .Net 4 Change: Data is now stored in nvarchar(max) instead of ntext Changes in 06.00.02 The scripts are now compatible with SQL Azure, tested in a ne...Coevery - Free CRM: Coevery 1.0.0.24: Add a sample database, and installation instructions.New ProjectsA Simple Eng-Hindi CMS: A simple English- Hindi dual language content management system for small business/personal websites.Active Social Migrator: This project for managing the Active Social migration tool.ANSI Console User Control: Custom console control for .NET WinformsAutoSPInstallerGUI: GUI Configuration Tool for SPAutoInstaller Codeplex ProjectCode Documentation Checkin Policy: This checkin policy for Visual Studio 2012 checks if c# code is documented the way it's configured in the config of the policy. Code Dojo/Kata - Free Time Coding: Doing some katas of the Coding Dojo page. http://codingdojo.org/cgi-bin/wiki.pl?KataCataloguefjycUnifyShow: fjycUnifyShowHidden Capture (HC): HC is simple and easy utility to hidden and auto capture desktop or active windowHRC Integration Services: Fake SQL Server Integration Services. LOLKooboo CMS Sites Switcher: Kooboo CMS Sites SwitcherMod.CookieDetector: Orchard module for detecting whether cookies are enabledMyCodes: Created!MySQL Statement Monitor: MySQL Statement Monitor is a monitoring tool that monitors SQL statements transferred over the network.NeoModulusPIRandom: The idea with PI Random is to use easy string manipulation and simple math to generate a pseudo random number. Net Core Tech - Medical Record System: This is a Medical Record System ProjectOraPowerShell: PowerShell library for backup and maintenance of a Oracle Database environment under Microsoft Windows 2008PinDNN: PinDNN is a module that imparts Pinterest-like functionality to DotNetNuke sites. This module works with a MongoDB database and uses the built-in social relatioPyrogen Code Generator: PyroGen is a simple code generator accepting C# as the markup language.restMs: wil be deleted soonScript.NET: Script.NET is a script management utility for web forms and MVC, using ScriptJS-like features to link dependencies between scripts.SpringExample-Pagination: Simple Spring example with PaginationXNA and Component Based Design: This project includes code for XNA and Component Based Design

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  • take my Java skills to the next level

    - by waingram
    I am well versed in the basics of Java programming, although through most of my career I have been maintaining, upgrading, and debugging someone else's Java code. I am mainly familiar with basic servlet applications. I have a strong beginner knowledge of Maven and Ant. I have more web development with Ruby on Rails, but would like to bring my Java skills up to par with regard to web development. It seems the world of Java is so big, I have no idea what the next logical step is for me. Spring? JAX-RB? EJBs? What is the next logical step for someone like me and how would you recommend I approach it?

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  • Where is a Web Development Career fueled by Passion?

    - by JMC Creative
    Quick Background Since learning basic html 5 years ago, I've become completely obsessed with the technology, the logic, and the thrill of solving problems involved with building websites. I am still stuck at a thoroughly non-programming type job, but would really like to move into the field of web programming/design. I have no educational background in the field (was trained as a fine artist and tutor), but in the past few years have progressed fully self-taught (and self-motivated) from html to css to php, mysql, jquery, and am now building rich web applications. The Question How can I prove to a company that even though I have no education, I have a passion to learn whatever is thrown my way? ...That essentially I would come at every issue with not only knowledge, but with a passionate desire to solve it, whether that means tackling a new language or debugging code for hours at a time? p.s. Sorry for the stupid title.

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  • Whats the best way of learning how to Develop Java Games

    - by Shaun
    As the Title says, the question is Whats the best way of learning how to Develop Java Games? Indeed there's over thousands of tutorials explaining and teaching you the basic's of Java and how It works but they are usually and majority of the tutorial's teaching you Java basic's are boring and don't push you as you could do. Basically, is there any tutorials out there that push you so and give you problems you have to solve and push your knowledge so you get a much better understanding of creating java games. This seems a ideal question for new people learning Java and hopefully should help newbie's learning Java. (Sorry if this sounds noobish).

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