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  • Linux multiplayer server, need some help.

    - by Viktor
    I need to write a server for a game, which is closer to action type game, so needs fast communication. There must be only one server, I'll just split the world in zones, but this is not the question. Client will be written in java using jMonkeyEngine. In my opinion I should write the server in java. I don't want to implement any low level features such as communication, reliable udp, etc. Can you suggest any java libraries that already implement this? Or maybe there is more suitable languages to implement this project (must run on linux)?

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  • Connect to SVN repository with Netbeans using SVN+SSH

    - by shuby_rocks
    Hello all, I am trying to connect to a SVN server in order to import my project into it with svn+ssh authentication method. I am using the NetBeans IDE (6.8) with subversion plugin installed on Windows XP SP2. I have plink installed with its path set in the Windows PATH env variable. When I use the similar looking repository URL (XXXX and YYYY replaced with sensible things) svn+ssh://XXXX@YYYY/home/dce/svn/trunk along with this external tunnel command plink -l <myUserName> -i C:\\privateKey.ppk I keep getting this error: org.tigris.subversion.javahl.ClientException: Network connection closed unexpectedly I searched about it on the Internet and tried many things but didn't work out. Please help if anybody has some idea what may be going wrong. Thanks a lot in advance.

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  • "isolinux.bin is missing or corrupt", when attempting to boot using disk in USB CD DRIVE

    - by Rodrigo Salazar
    I have an external CD drive which connects to USB. I burned 11.10 Ubuntu image to CD-R. The disk correctly shows me install page when I autoload disk within Windows 7. When I restart to attempt to boot from disk to install Ubuntu I get the following error for a split second before I continues to boot to Windows. "isolinux.bin is missing or corrupt". Clearly my computer knows that this is a Linux disk in the usb cd-drive...What went wrong? edit: I reburned another disk, same error

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  • Big Data – Buzz Words: What is Hadoop – Day 6 of 21

    - by Pinal Dave
    In yesterday’s blog post we learned what is NoSQL. In this article we will take a quick look at one of the four most important buzz words which goes around Big Data – Hadoop. What is Hadoop? Apache Hadoop is an open-source, free and Java based software framework offers a powerful distributed platform to store and manage Big Data. It is licensed under an Apache V2 license. It runs applications on large clusters of commodity hardware and it processes thousands of terabytes of data on thousands of the nodes. Hadoop is inspired from Google’s MapReduce and Google File System (GFS) papers. The major advantage of Hadoop framework is that it provides reliability and high availability. What are the core components of Hadoop? There are two major components of the Hadoop framework and both fo them does two of the important task for it. Hadoop MapReduce is the method to split a larger data problem into smaller chunk and distribute it to many different commodity servers. Each server have their own set of resources and they have processed them locally. Once the commodity server has processed the data they send it back collectively to main server. This is effectively a process where we process large data effectively and efficiently. (We will understand this in tomorrow’s blog post). Hadoop Distributed File System (HDFS) is a virtual file system. There is a big difference between any other file system and Hadoop. When we move a file on HDFS, it is automatically split into many small pieces. These small chunks of the file are replicated and stored on other servers (usually 3) for the fault tolerance or high availability. (We will understand this in the day after tomorrow’s blog post). Besides above two core components Hadoop project also contains following modules as well. Hadoop Common: Common utilities for the other Hadoop modules Hadoop Yarn: A framework for job scheduling and cluster resource management There are a few other projects (like Pig, Hive) related to above Hadoop as well which we will gradually explore in later blog posts. A Multi-node Hadoop Cluster Architecture Now let us quickly see the architecture of the a multi-node Hadoop cluster. A small Hadoop cluster includes a single master node and multiple worker or slave node. As discussed earlier, the entire cluster contains two layers. One of the layer of MapReduce Layer and another is of HDFC Layer. Each of these layer have its own relevant component. The master node consists of a JobTracker, TaskTracker, NameNode and DataNode. A slave or worker node consists of a DataNode and TaskTracker. It is also possible that slave node or worker node is only data or compute node. The matter of the fact that is the key feature of the Hadoop. In this introductory blog post we will stop here while describing the architecture of Hadoop. In a future blog post of this 31 day series we will explore various components of Hadoop Architecture in Detail. Why Use Hadoop? There are many advantages of using Hadoop. Let me quickly list them over here: Robust and Scalable – We can add new nodes as needed as well modify them. Affordable and Cost Effective – We do not need any special hardware for running Hadoop. We can just use commodity server. Adaptive and Flexible – Hadoop is built keeping in mind that it will handle structured and unstructured data. Highly Available and Fault Tolerant – When a node fails, the Hadoop framework automatically fails over to another node. Why Hadoop is named as Hadoop? In year 2005 Hadoop was created by Doug Cutting and Mike Cafarella while working at Yahoo. Doug Cutting named Hadoop after his son’s toy elephant. Tomorrow In tomorrow’s blog post we will discuss Buzz Word – MapReduce. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: Big Data, PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL

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  • alien deletes .deb automatically while converting from .rpm

    - by Andre
    I'm trying to convert .rpm to .deb using alien. alien -k libtetra-1.0.0-2.i386.rpm Alien says that: libtetra-1.0.0-2.i386.deb generated But when I check the folder - there is just original .rpm and no .deb. Also - I can see that for a split second there is a .deb file in a folder. so it looks like alien create .deb and deletes it right away. I suspect that it's maybe because I run 64 bit os and package is 32? Can somebody explain why alien deletes .deb automatically?

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  • Is using MultiMaps code smell? If so what alternative data structures fit my needs?

    - by Pureferret
    I'm trying to model nWoD characters for a roleplaying game in a character builder program. The crux is I want to support saving too and loading from yaml documents. One aspect of the character's is their set of skills. Skills are split between exactly three 'types': Mental, Physical, and Social. Each type has a list of skills under if. My Yaml looks like this: PHYSICAL: Athletics: 0 Brawl: 3 MENTAL: Academics: 2 Computers My initial thought was to use a Multimap of some sort, and have the skill type as an Enum, and key to my map. Each Skill is an element in the collection that backs the multimap. However, I've been struggling to get the yaml to work. On explaining this to a colleague outside of work they said this was probably a sign of code smell, and he's never seen it used 'well'. Are multiMaps really code smell? If so what alternate data structures would suit my goals?

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  • Is there a market for a Text-based empire-building game?

    - by Vishnu
    I am working on building a text-based in-browser empire building game. The screen will be split into a console and an EXTREMELY rough vector map of your empire (just squares in a bigger square). Commands such as building and expanding would be typed into the console and automatically reflected in the map. Would there be any market for such a game? Would anyone want to play? To clarify, it would be online and everyone's empire would be in the same 'world'.

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  • Ruby server very slow outside localhost (teambox)

    - by ncatnow
    I just installed TeamBox on my Ubuntu 9.10 server. I have it up and running on port 3000 using the provided server script. It's running extremely slow, up to 30 seconds per HTTP request when connecting from another computer. I used links to load up TeamBox from the shell and it took no time at all. I then setup an SSH tunnel and again it was working very fast. I run about 30 vhosts through apache on this server, as well as SAMBA etc and do not have any problems. How can I troubleshoot this problem?

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  • JSF 2.2 recent progress - Early Draft

    - by alexismp
    JSF specification lead Ed Burns has an update on the progress of JSF 2.2, another component which should be required as part of the upcoming Java EE 7 standard. This includes a reminder of the scope of this specification, the availability of the early draft and height specific features that are being worked on and split into "Mostly Specified Features" and "Not Yet Fully Specified Features" (I think you can read the latter as "at risk"). My favorite is "763-EverythingIsInjectable". Remember that JSF 2.2 is due out in the middle of 2012 which is in time to be integrated in the Java EE 7 platform JSR (currently scheduled for second half of 2012). In the mean time, JSF 2.2 nightly builds are available.

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  • Ubuntu confuses my partitions

    - by Diego
    I have 3 relevant partitions split between 2 disks, sda2: Windows 1 partition sda3: Ubuntu partition sdb1: Data partition I was using pysdm to add a label to my partitions and somehow I seem to have screwed up my installation. Now, every time I access the Data partition mounted in /media/Data I see the files in my Windows partition, and viceversa. I've tried unmounting and remounting correctly to no avail, it seems that wherever I mount sda2, if I access that folder I get the files in sdb1, and viceversa. Anyone know what may have happened and how to solve this? Update: This is the result of blkid: /dev/sda1: LABEL="System Reserved" UUID="C62603F02603E073" TYPE="ntfs" /dev/sda2: LABEL="Windows" UUID="00A6D498A6D49010" TYPE="ntfs" /dev/sda5: UUID="033cac3b-6f77-4f09-a629-495dc866866a" TYPE="ext4" /dev/sdb1: LABEL="Data" UUID="BCD83AE3D83A9B98" TYPE="ntfs" These are the contents of my ftsab file: UUID=033cac3b-6f77-4f09-a629-495dc866866a / ext4 errors=remount-ro,user_xattr 0 1 /dev/sda1 /media/Boot_old ntfs defaults 0 0 /dev/sda2 /media/Windows ntfs defaults 0 0 /dev/sdb1 /media/Data ntfs nls=iso8859-1,ro,users,umask=000 0 0

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  • Getting overwhelmed after starting a new project

    - by Kian Mayne
    I started a project (a Windows based timetable program that helps you stay organised with your subjects and assignments). The problem is that I'm not sure how I should manage this project and what order to build things. I.e. Should I build all the different interface elements then write the code or should I make an interface, code it, make another interface then code that? So my question is; how do I split up this longish project into small, ordered pieces to complete; and how should I order this?

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  • Good Practices for development team in large projects

    - by Moshe Magnes
    Since I started learning C a few years ago, I have never been a part of a team that worked on a project. Im very interested to know what are the best practices for writing large projects in C. One of the things i want to know, is when (not how) do I split my project into different source files. My previous experience is with writing a header-source duo (the functions defined in the header are written in the source). I want to know what are the best practices for splitting a project, and some pointers on important things when writing a project as part of a team.

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  • Create edges in Blender

    - by Mikey
    I've worked with 3DS Max in Uni and am trying to learn Blender. My problem is I know a lot of simple techniques from 3DS max that I'm having trouble translating into Blender. So my question is: Say I have a poly in the middle of a mesh and I want to split it in two. Simply adding an edge between two edges. This would cause a two 5gons either side. It's a simple technique I use every now and then when I want to modify geometry. It's called "Edge connect" in 3DS Max. In Blender the only edge connect method I can find is to create edge loops, not helpful when aiming at low poly iPhone games. Is there an equivalent in blender?

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  • Inside Red Gate - Project teams

    - by Simon Cooper
    Within each division in Red Gate, development effort is structured around one or more project teams; currently, each division contains 2-3 separate teams. These are self contained units responsible for a particular development project. Project team structure The typical size of a development team varies, but is normally around 4-7 people - one project manager, two developers, one or two testers, a technical author (who is responsible for the text within the application, website content, and help documentation) and a user experience designer (who designs and prototypes the UIs) . However, team sizes can vary from 3 up to 12, depending on the division and project. As an rule, all the team sits together in the same area of the office. (Again, this is my experience of what happens. I haven't worked in the DBA division, and SQL Tools might have changed completely since I moved to .NET. As I mentioned in my previous post, each division is free to structure itself as it sees fit.) Depending on the project, and the other needs in the division, the tech author and UX designer may be shared between several projects. Generally, developers and testers work on one project at a time. If the project is a simple point release, then it might not need a UX designer at all. However, if it's a brand new product, then a UX designer and tech author will be involved right from the start. Developers, testers, and the project manager will normally stay together in the same team as they work on different projects, unless there's a good reason to split or merge teams for a particular project. Technical authors and UX designers will normally go wherever they are needed in the division, depending on what each project needs at the time. In my case, I was working with more or less the same people for over 2 years, all the way through SQL Compare 7, 8, and Schema Compare for Oracle. This helped to build a great sense of camaraderie wihin the team, and helped to form and maintain a team identity. This, in turn, meant we worked very well together, and so the final result was that much better (as well as making the work more fun). How is a project started and run? The product manager within each division collates user feedback and ideas, does lots of research, throws in a few ideas from people within the company, and then comes up with a list of what the division should work on in the next few years. This is split up into projects, and after each project is greenlit (I'll be discussing this later on) it is then assigned to a project team, as and when they become available (I'm sure there's lots of discussions and meetings at this point that I'm not aware of!). From that point, it's entirely up to the project team. Just as divisions are autonomous, project teams are also given a high degree of autonomy. All the teams in Red Gate use some sort of vaguely agile methodology; most use some variations on SCRUM, some have experimented with Kanban. Some store the project progress on a whiteboard, some use our bug tracker, others use different methods. It all depends on what the team members think will work best for them to get the best result at the end. From that point, the project proceeds as you would expect; code gets written, tests pass and fail, discussions about how to resolve various problems are had and decided upon, and out pops a new product, new point release, new internal tool, or whatever the project's goal was. The project manager ensures that everyone works together without too much bloodshed and that thrown missiles are constrained to Nerf bullets, the developers write the code, the testers ensure it actually works, and the tech author and UX designer ensure that people will be able to use the final product to solve their problem (after all, developers make lousy UI designers and technical authors). Projects in Red Gate last a relatively short amount of time; most projects are less than 6 months. The longest was 18 months. This has evolved as the company has grown, and I suspect is a side effect of the type of software Red Gate produces. As an ISV, we sell packaged software; we only get revenue when customers purchase the ready-made tools. As a result, we only get a sellable piece of software right at the end of a project. Therefore, the longer the project lasts, the more time and money has to be invested by the company before we get any revenue from it, and the riskier the project becomes. This drives the average project time down. Small project teams are the core of how Red Gate produces software, and are what the whole development effort of the company is built around. In my next post, I'll be looking at the office itself, and how all 200 of us manage to fit on two floors of a small office building.

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  • WebCenter Content shared folders for clustering

    - by Kyle Hatlestad
    When configuring a WebCenter Content (WCC) cluster, one of the things which makes it unique from some other WebLogic Server applications is its requirement for a shared file system.  This is actually not any different then 10g and previous versions of UCM when it ran directly on a JVM.  And while it is simple enough to say it needs a shared file system, there are some crucial details in how those directories are configured. And if they aren't followed, you may result in some unwanted behavior. This blog post will go into the details on how exactly the file systems should be split and what options are required. [Read More]

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  • How to round currency values [migrated]

    - by Kenny
    I already have several ways to solve this, but I am interested in whether there is a better solution to this problem. Please only respond with a pure numeric algorithm. String manipulation is not acceptable. I am looking for an elegant and efficient solution. Given a currency value (ie $251.03), split the value into two half and round to two decimal places. The key is that the first half should round up and the second should round down. So the outcome in this scenario should be $125.52 and $125.51.

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  • how do you read from system.out in Java [closed]

    - by Dan
    I'm trying to create a word scramble game and so far I have taken a vector of randomly assorted strings that contains both words and hints and split them into two vectors. I have randomly scrambled the word and set this all up in text boxes. Right now I'm stuck because I have a text box that takes input but I'm not sure how to read that in? I want the user to type the unscrambled word into the text box and have it calculate as correct and move on to the next word immediately. I also don't know how to get the keys working. I want the "?" character to be the hint button that shows the hint. At the moment the hint box works if I type the question mark in using the System.in but it doesn't work if I type it directly in to the text box. The characters are showing up in the text box but nothing is working after that.

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  • convert image to spritesheet of tiles for isometric map?

    - by Paul
    is there a way to convert an isometric image (like the first image) to a spritesheet (like the second image), in order to place each image on the isometric map with the code? The map looks like the first image, but some buildings are bigger than just one tile, so I need several squares (let's say the first image is a building, made of multiple tiles with different colors), and each square is placed with an offset of 64x32. The building is created in Blender and I save the image with the isometric perspective. But I have to split each square from this image in order to have the spritesheet, maybe there is smarter way, or a java software that would make the conversion for me?

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  • Only recognizes one partition from multi partitions SD card

    - by Jay Ngo
    Hello everybody, I split my sd card into 2 partitions. When i use usb-card-reader to read my sd card, only the one partition shows up on the screen, the other doesn't. I have run the command "sudo fdisk -l" and the result is the same, only one partition is recognized. But i do believe both partitions of my sd card work fine, because i still can boot my single-board computer with that sd card and run some programms, which are inside that unreadable partition. How can i access both partitions of my sd card? Does anyone know how to solve this kind of problem? I really appreciate your help.

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  • Hiring a swing developer - Need some tough assignments

    - by Jay
    I am trying to hire a java swing developer, who would most likely work on a java 1.4 based swing app. I have finalized 2-3 people and I would like to give them a one week assignment on Swing. It has to be a really tough one - something that they can't just copy from the internet and something that tests their in-depth knowledge on Swing. I can think of things like split screen windows, and custom UI controls that would involve custom paining. If you were to prepare such an assignment, what would you do? Please share your thoughts/experiences.

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  • Good Practices for writing large (team/solo) projects (In C)

    - by Moshe Magnes
    Since I started learning C a few years ago, I have never been a part of a team that worked on a project. Im very interested to know what are the best practices for writing large projects in C. One of the things i want to know, is when (not how) do I split my project into different source files. My previous experience is with writing a header-source duo (the functions defined in the header are written in the source). I want to know what are the best practices for splitting a project, and some pointers on important things when writing a project as part of a team.

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  • Transparency in XNA-4 primitives

    - by Shashwat
    I'm using XNA 4 with Visual Studio 2010. I'm trying to create a simple 3D world with walls and doors in which the user to free to roam around. A wall is just a rectangle which is currently being rendered with four vertices using triangle strips. But to create a door, I'd have to split it into three rectangles as shown in the figure. Four quadrilaterals if I want to have the following door-style It will become more complex to have multiple doors on the same wall or if I have windows. Is there any shorter way to handle this? I am looking for something that will just make the wall transparent wherever I want. I found a solution but facing a problem here

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  • Cool examples of procedural pixel shader effects?

    - by Robert Fraser
    What are some good examples of procedural/screen-space pixel shader effects? No code necessary; just looking for inspiration. In particular, I'm looking for effects that are not dependent on geometry or the rest of the scene (would look okay rendered alone on a quad) and are not image processing (don't require a "base image", though they can incorporate textures). Multi-pass or single-pass is fine. Screenshots or videos would be ideal, but ideas work too. Here are a few examples of what I'm looking for (all from the RenderMonkey samples): PS - I'm aware of this question; I'm not asking for a source of actual shader implementations but instead for some inspirational ideas -- and the ones at the NVIDIA Shader Library mostly require a scene or are image processing effects. EDIT: this is an open-ended question and I wish there was a good way to split the bounty. I'll award the rep to the best answer on the last day.

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  • Mount an image created from ddrescue

    - by oshirowanen
    I know this question has been asked before, but following those answers does not seem to work for me. I have created an image of a USB stick this is on my laptop harddrive. How do I mount this image? The command I used to create the image was: ddrescue --no-split /dev/sdb usb_recovered usb_recovery_log What am I supposed to do next? Mount it? Fix it then mount it? Mount it then fix it? And how? UPDATE: What I want to recover are the files in the image. How? I don't know as I have tried testdisk and it can't find partitions, and I have tried fdisk and it can't find a partition table in the image either.

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  • Only recognizes one of multiple partitions on SD card

    - by Jay Ngo
    Hello everybody, I split my sd card into 2 partitions. When i use usb-card-reader to read my sd card, only the one partition shows up on the screen, the other doesn't. I have run the command "sudo fdisk -l" and the result is the same, only one partition is recognized. But i do believe both partitions of my sd card work fine, because i still can boot my single-board computer with that sd card and run some programms, which are inside that unreadable partition. How can i access both partitions of my sd card? Does anyone know how to solve this kind of problem? I really appreciate your help.

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