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• Scale DIV with tiles

  - by user15350

  I am trying to create a repeating background. I have a main DIV with a grid of small 16x16 DIVs. I am trying to scale the main DIV in CSS; when the small DIVs simply have a red background color everything works great, but when there is a background image in the small DIVs then borders become visible between the tiles. This image explains the problem: http://cl.ly/FpNW/o Check the HTML in these examples: With BG-COLOR: http://jsfiddle.net/pTLXw/ With BG-IMG: http://jsfiddle.net/vkpuY/ Does anyone know what is causing this problem and how to fix it? If it is not possible to fix while using DIV, is there another way to do this? Thanks you so much!

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• in memory datastore in haskell

  - by Simon

  I want to implement an in memory datastore for a web service in Haskell. I want to run transactions in the stm monad. When I google hash table steam Haskell I only get this: Data. BTree. HashTable. STM. The module name and complexities suggest that this is implemented as a tree. I would think that an array would be more efficient for mutable hash tables. Is there a reason to avoid using an array for an STM hashtable? Do I gain anything with this stem hash table or should I just use a steam ref to an IntMap?

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• Do you think code is self documenting?

  - by Desolate Planet

  This is a question that was put to me many years ago as a gradute in a job interview and it's nagged at my brain now and again and I've never really found a good answer that satisfied me. The interviewer in question was looking for a black and white answer, there was no middle ground. I never got the chance to ask about the rationale behind the question, but I'm curious why that question would be put to a developer and what you would learn from a yes or no answer? From my own point of view, I can read Java, Python, Delphi etc, but if my manager comes up to me and asks me how far along in a project I am and I say "The code is 80% complete" (and before you start shooting me down, I've heard this uttered in a couple of offices by developers), how exactly is that self documenting? Apologies if this question seems strange, but I'd rather ask and get some opinions on it to gain a better understanding of why it would be put to someone in an interview.

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• How do I install the build dependencies for Android?

  - by newcomer

  Hi, I'm trying build the Android source using these packages. ButI am getting this error: $ sudo apt-get install git-core gnupg flex bison gperf build-essential zip curl zlib1g-dev gcc-multilib g++-multilib libc6-dev-i386 lib32ncurses5-dev ia32-libs x11proto-core-dev libx11-dev lib32readline5-dev lib32z-dev [sudo] password for asdf: Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package libc6-dev-i386 E: Unable to locate package lib32ncurses5-dev E: Unable to locate package ia32-libs E: Unable to locate package lib32readline5-dev E: Unable to locate package lib32z-dev I tried to download & install say libc6-dev-i386 debian package form here. But when I double click on the .deb file Ubuntu Software Manager says wrong architecture 'amd64'. (My OS: 32-bit Ubuntu 10.10 (updated), Processor: AMD phenom II 64-bit.)

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• JAX Innovation Awards 2011

  - by Tori Wieldt

  The JAX Innovation Awards were presented tonight at the JAX Conference in San Jose, California, to reward those technologies, companies, organizations and individuals that make outstanding contributions to Java. The winners were:     •    Most Innovative Java Technology - JRebel    •    Most Innovative Java Company - Red Hat    •    Top Java Community Ambassador - Martin Odersky    •    Special Jury Award - Brian GoetzIn addition to being acknowledged best-in-class by peers from the Java community, winners received $2500 each. The JAXConf team took nominations from the community, had them reviewed by a panel of independent experts to create a shortlist, which was then voted on by the Java community."The java culture inspires innovation" said Sebastian Meyen, JAX Conference Chair, "and we are happy to reward that."  

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• How to get a point to the left/right of a vector

  - by MulletDevil

  I have a position vector of a point in space and a quaternion for it's rotation. What i'm trying to calculate is a point too the left and a point to the right. I have the position and rotation(quaternion) of the red dot. What I want is to get the position of the green dots. I have a float value for the distance I want these points to be. With only the position and rotation is it possible to get a unit direction vector pointing left/right which I can multiply by my float value? Edit: I also know the original direction vector.

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• Circle vs Edge collision detection / resolution

  - by topheman

  I made a javascript class Ball.js that handles physics interactions betweens balls as well as painting. In the v1.0, the ball vs ball collision detection and resolution is well handled. In the next version (v2), I'm trying to add edgeCollision handling. I'm having some problems, maybe you will be able to help me. All the v2 branch source code is on github repository : https://github.com/topheman/Ball.js/tree/v2 The v2 demos (where you can see the bug I will be talking about) : http://labs.topheman.com/Ball-v2/#help As you will see on the demo, I have two major problems that I'm having a really hard time to solve on Ball.js : method resolveEdgeCollision : bounce angle is inconsistent method checkEdgeCollision : if the ball's velocity (the length that it runs each frame) is higher than its diameter, eventually, it will pass through an edge, without triggering any collision Any Ideas ?...

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• Ubuntu (and any other linux os) not booting from cd or usb

  - by Amith

  I will tell you the whole story,one night when i was using KDE on Ubuntu 10.10 Kwin crashed then i shut down the os next day when i booted it the display came completely garbled and i went to safe graphics mode ,it worked and in reinstalled the Nvidia drivers and then restarted .Then immediatly, It said No init found Busybox XX.XX then I thought ill do a fresh install I inserted the ubuntu cd provided to me by Canonical.When i pressed 'try ubuntu without installing' instead of the graphic boot screen i saw.Ubuntu 10.10 in regular text and a progress bar few seconds after that the screen was flooded with error messages first alot of white then red.I then went to my win7 installation and saw a website which told me to find a Ext3 reader and format the ubuntu partition and the swap.I did that and when i restarted. GRUB configuration not found grub> Then it took my win 7 ERD and restored 7's bootloder Xp and 7 were working i put in the livecd again,Same error,Now usin my seven,Please help geeks,Ive even tried Knoppix,Fedora,Debiane.t.c they wont boot and i want to retain my win 7 and winxp partitions,I really miss linux.

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• Looking for an old classic book about Unix command-line tools

  - by Little Bobby Tables

  I am looking for a book about the Unix command-line toolkit (sh, grep, sed, awk, cut, etc.) that I read some time ago. It was an excellent book, but I totally forgot its name. The great thing about this specific book was the running example. It showed how to implement a university bookkeeping system using only text-processing tools. You would find a student by name with grep, update grades with sed, calculate average grades with awk, attach grades to IDs with cut, and so on. If my memory serve, this book had a black cover, and was published circa 1980. Does anyone remember this book? I would appreciate any help in finding it.

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• Diagramming software with API allowing high customisation of shapes and actions

  - by jenson-button-event

  I am after something like Visio or Lucid. A relatively simple charting/diagramming tool, to build tree-like structures from (my) pre-defined nodes (squares), but with a powerful API. Requirements: limit the type of objects allowed to be dropped on the diagram validate a model (e.g. node of type A must precede node of type B; must enter node Title) export a model import a model Our domain is very specific, and its a tool we'd want to offer to some of our power users. The $500 Visio licence isn't really within the business model. I'll put no constraints on framework or deployment (web or desktop) - is there anything out there?

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• Unable to install ia32-libs package

  - by Ron Thomas

  I need to manually install the drivers for my graphics card, which is an ATI 2600 xt. But I am using a 64-bit platform and to do so i need the ia32-libs package. i have scoured the net for fixes, workarounds etc. but have found none that work. the output i get after trying apt-get is: Reading package lists... Done Building dependency tree Reading state information... Done Package ia32-libs is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package 'ia32-libs' has no installation candidate I am running linux mint 12

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• What is a good network for full-page rich ads?

  - by Vishnu

  I'm currently developing a website where users will be able to upload content. I would like to be able to show a full-page ad whenever someone tries to view the content. The ad should take up most of the screen, and I should be able to have a "continue to the content --" link at the top. Preferably, I want something like what is currently on Forbes (if you haven't seen it, here: http://www.forbes.com/fdc/welcome.shtml but with an ad in the black area). Of course, the most revenue is the best. Thanks.

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• How to install wvdial without getting the following error?

  - by chndn

  When I ran the command: sudo apt-get install wvdial I got this error message : error p@p:~$ sudo apt-get install wvdial Reading package lists... Done Building dependency tree Reading state information... Done Package wvdial is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package wvdial has no installation candidate p@p:~$ So how can I install wvdial? I don't have access to internet from Ubuntu for direct installation. Please help

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• Tips for building an AI for a 2D racing game

  - by declique

  I have a school project to build an AI for a 2D racing game in which it will compete with several other AIs (no collision). We are given a black and white bitmap image of the racing track, we are allowed to choose basic stats for our car (handling, acceleration, max speed and brakes) after we receive the map. The AI connects to the game's server and gives to it several times a second numbers for the current acceleration and steering. The language I chose is C++, by the way. The questions are: What is the best strategy or algorithm (since I want to try and win)? I currently have in mind some ideas found on the net and one or two of my own, but I would like before I start to code that my perspective is one of the best. What good books are there on that matter? What sites should I refer to?

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• Cinnamon install problem ubuntu 12.04

  - by Kin.

  I was following the How do I install the Cinnamon Desktop?, but when i install, it like this locahost@locahost:~$ sudo apt-get install cinnamon Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: cinnamon : Depends: libgjs0- E: Unable to correct problems, you have held broken packages. How can i install the libgjs0- package?

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• Booting 11.10 from USB stick on MacBook Pro 5,1 fails

  - by Helge Stenström

  I've created a bootable memory stick on a Windows computer, and tested it on an HP PC. It's made from a 64-bit image of Ubuntu 11.10, downloaded from http://www.ubuntu.com/download/ubuntu/download. When I boot from this memory stick, there is some kind of boot menu, where I can choose to run Ubuntu from the memory stick, or install. I select Run from memory stick. (the words may be wrong here, I'm taking it from memory.) From this point, the screen is black (but backlighted), and I can't do anything but turn off the computer. It gets hot, too. Has anyone been more successful than me? Are there known issues? The computer is a 15 inch MacBook Pro 5,1 (unibody, late 2008), 4 GB memory.

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• Minecraft becomes blank after loading

  - by James Kosmopoulos

  I have Minecraft installed but whenever I open it, it shows the login screen, so I login, and then when I click login, the window turns black. When I tried to play in in browser, the same thing happened except the window turned whit. Please help guys! I feel like I've tried EVERYTHING! Thanks! =) Oh and if you want a better look at the problem, I've created this video that is a recording of my desktop and shows what happens when I try to run Minecraft. http://www.youtube.com/watch?v=8CMsnwoUbEI

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• Cinnamon cannot install due to libbgjs0 dependency

  - by Kin.

  I was following the How do I install the Cinnamon Desktop?, but when i install, it like this locahost@locahost:~$ sudo apt-get install cinnamon Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: cinnamon : Depends: libgjs0- E: Unable to correct problems, you have held broken packages. How can i install the libgjs0- package?

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• Bridge made out of blocks at an angle

  - by Pozzuh

  I'm having a bit of trouble with the math behind my project. I want the player to be able to select 2 points (vectors). With these 2 points a floor should be created. When these points are parallel to the x-axis it's easy, just calculate the amount of blocks needed by a simple division, loop through that amount (in x and y) and keep increasing the coordinate by the size of that block. The trouble starts when the 2 vectors aren't parallel to an axis, for example at an angle of 45 degrees. How do I handle the math behind this? If I wasn't completely clear, I made this awesome drawing in paint to demonstrate what I want to achieve. The 2 red dots would be the player selected locations. (The blocks indeed aren't square.) http://i.imgur.com/pzhFMEs.png.

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• Can't get Past Login Screen -Graphics Drivers 12.10

  - by mchangun

  Newbie Linux user here. I just installed Ubuntu 12.10, dual booting with Windows 8 Preview Release Build 8400 on a Dell Precision 490 workstation with Nvidia Quandro NVS 55/280 PCI graphics card. I cannot login to Ubuntu - after entering my password and pressing enter, the screen graphics gets garbled for a few seconds, and then the screen goes black showing only the mouse cursor. I suspect it's something to do with my Graphics Card, everything on the GUI login screen feels very sluggish. I know what I have provided here doesn't give you much information, would appreciate it if I could get some guidance on how to provide more useful logs. Thank you.

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• Movie Poster Colors Over Time

  - by Jason Fitzpatrick

  This spectrograph-like image records tens of thousands of movie posters over the course of a century, showing a steady shift towards posters that emphasize black, purple, and blue color tones. It’s a neat look at how the color tastes of an entire industry shift over time. Vijay Pandurangan had a disagreement with a friend about whether or not movie posters were becoming darker/bluer over time. Rather than simply agree to disagree, he whipped up a piece of code that downloaded and analyzed thousands of movie posters proving that, in fact, there was a slow and steady shift towards darker and bluer posters. Hit up the link below to see the interactive version (and larger!) version of his infographic as well as his explanation of the process and the source code. Colours In Movie Posters Since 1914 [via Flowing Data] HTG Explains: What Is Windows RT and What Does It Mean To Me? HTG Explains: How Windows 8′s Secure Boot Feature Works & What It Means for Linux Hack Your Kindle for Easy Font Customization

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• AMD 6870 Twin Frozr II video adapter issues

  - by user35427

  Hardware: AMD 6870 Twin Frozr II (1GB), ASUS 990 chipset Software: Ubuntu 11.10 Built a new PC from scratch, loaded it with Ubuntu 11.10. It's displaying, but with poor resolution, unable to change, as it says no drivers are installed. Ubuntu indicates that there are 2 proprietary drivers available to download: ATI/AMD proprietary FGLRX Graphics driver (Post-release update) ATI/AMD proprietary FGLRX Graphics driver The first won't even finish downloading. The second downloads and installs, but when I restart the PC as requested it boots up, I see purple in the background, then the video feed just stops with a black screen. I can still hear ubuntu boot up though. It seems like I just need the latest drivers, googled around and not had much luck. I'm pretty new with Ubuntu, but have basic knowledge. Any potentially helpful information would be welcome.

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• a program called football team

  - by bosco

  how do you solve the following using java?Soccer team A is made up of the bench and people on the lineup. The program should enable the user to select a lineup and assign positions to players. It should also allow for the manipulation of attributes such as age, jersey number, fitness status, yellow and red cards, state whether one is a goalkeeper, defender, etc. Information such as losses ,wins and points of the entire team are also important. the above task requires the to use of: Static members for attributes with values common to all objects of the same class The “this” keyword to distinguish constructor parameters and data members Constructor overloading Method overloading Use two collections of the type Arraylist to store objects.

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• How do I change the color of the screen that is displayed before the login screen?

  - by Jake Newkirk

  How do I change the color that the system displays just before the login screen is displayed? Here is the boot sequence on my machine in the order that things are displayed: The BIOS screen is flashed. A Black screen is displayed for a few seconds. My Plymouth splash screen is displayed. Purple screen is displayed for a few seconds (This is what I want to change). Finally, the login screen is displayed. Please let me know if you require any additional information while addressing this problem and as always, thank you for your time.

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• What factors influence you to try out a new framework or tool?

  - by VirtuosiMedia

  I'm in the process of putting the final touches on an open-source framework that I hope to release in the next few months. It's something that I'd like to develop a community for and so I'm curious about what factors influence your decision to use a new framework or tool and why. Some of the specific things I'd like to know more about (feel free to add to this): Types of documentation/tutorials/instruction Community support (comments/forum) Updates (blog/social media/feeds) Look and feel of the project website design White papers/testimonials A big feature list Community size Tools Ability to contribute Project test coverage (stability/security) Level of buzz (recommended by friends or around the web) Convincing marketing copy Ideally, I'd like to have all of the above, but what specific features/qualities will carry greater weight in getting programmers to adopt something new? What says, 'This is a professional-grade project,' and what are red flags that keep you from trying it out?

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