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• JDK 7 In Action - Learn With Java Tutorials and Developer Guides

  - by sowmya

  At JavaOne 2012, Stuart Marks, Mike Duigou, and Joe Darcy gave a presentation about JDK 7 In Action. Learn more about using JDK 7 features with the help of Java Tutorials and JDK 7 Developer Guides. Links to relevant information are provided below. If you are considering moving to JDK 7 from a previous release, the JDK 7 Release Notes and JDK 7 Adoption Guide are great resources. Project Coin Features Improved Literals * Literals section in Primitive Datatypes topic. * Binary Literals * Underscores in Numeric Literals Strings In Switch * Strings In Switch Diamond * Type Inference for Generic Instance Creation * Type Inference and Instantiation of Generic Classes Multi-catch and Precise Throw * Catching Multiple Exception Types and Rethrowing Exceptions with Improved Type Checking * Catch Blocks Try-with-resources * The try-with-resources Statement NIO.2 File System API * File I/O for information on path, files, change notification, and more * Zip File System Provider * Zip File System Provider * Developing a Custom File System Provider Fork Join Framework * Fork/Join - Sowmya

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• Breaking up a large PHP object used to abstract the database. Best practices?

  - by John Kershaw

  Two years ago it was thought a single object with functions such as $database->get_user_from_id($ID) would be a good idea. The functions return objects (not arrays), and the front-end code never worries about the database. This was great, until we started growing the database. There's now 30+ tables, and around 150 functions in the database object. It's getting impractical and unmanageable and I'm going to be breaking it up. What is a good solution to this problem? The project is large, so there's a limit to the extent I can change things. My current plan is to extend the current object for each table, then have the database object contain these. So, the above example would turn into (assume "user" is a table) $database->user->get_user_from_id($ID). Instead of one large file, we would have a file for every table.

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• Simplifying ASP.NET Demos By Switching Web Server

  Starting with the DXperience v2010.1 release, our ASP.NET demos will no longer use the IIS web server. Instead, were switching to use the built-in ASP.NET Development Server (formerly known as Cassini web server). Why The Change? During the ASP.NET European training tour, we learned that many developers had issues with their IIS installations. While some were easy to fix and some were more, um, challenging, it's still a roadblock to appreciating our ASP.NET demos. The easiest fix is to use...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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• Go up one directory in mod_rewrite

  - by Rudolph Gottesheim

  I've got a standard Zend Framework 1 project that looks a bit like this: Project |- public |- .htaccess |- index.php The .htaccess looks like this: RewriteEngine On RewriteBase / RewriteRule ^image/.*$ img.php?file=$1 [NC,L] RewriteCond %{REQUEST_FILENAME} -s [OR] RewriteCond %{REQUEST_FILENAME} -l [OR] RewriteCond %{REQUEST_FILENAME} -d RewriteRule ^.*$ - [NC,L] RewriteRule ^.*$ index.php [NC,L] Now I want to start transitioning the site to Zend Framework 2, which I put in a separate directory in the root, so the whole thing looks like this: Project |- public |- .htaccess |- index.php |- zf2 |- public |- .htaccess |- index.php What would I have to change in my original (ZF1) .htaccess to route all requests to (for example) /zf2/whatever to ZF2's index.php? I've tried RewriteRule ^zf2(/.*)$ ../zf2/public/index.php [NC,L] in the line after RewriteBase /, but that just gives me a 400 Bad Request.

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• Changing DisplayMode seems not to update Input&Graphic Dimension

  - by coding.mof

  I'm writing a small game using Slick and Nifty-GUI. At the program startup I set the DisplayMode using the following lines: AppGameContainer app = new ... app.setDisplayMode( 800, 600, false ); app.start(); I wrote a Nifty-ScreenController for my settings dialog in which the user can select the desired DisplayMode. When I try to set the new DisplayMode within this controller class the game window gets resized correctly but the Graphics and Input objects aren't updated accordingly. Therefore my rendering code just uses a part of the new window. I tried to set different DisplayModes in the main method to test if it's generally possible to invoke this method multiple times. It seems that changing the DisplayMode only works before I call app.start(). Furthermore I tried to update the Graphics & Input object manually but the init and setDimensions methods are package private. :( Does someone know what I'm doing wrong and how to change the DisplayMode correctly?

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• Learning functional programming [closed]

  - by Oni

  This question is similar to Choosing a functional programming language. I want to learn functional programming but I am having troubles choosing the right programming language. At the university I studied Haskell for 2 months, so I have a basic idea of what a functional language is. I have read a lot that functional programming change your way of think. I started to take a look to Clojure, which I like for several reasons(code as data, JVM, etc). What stops me from continue learning Clojure is that it is not a pure functional language and I am afraid of ending up using imperative/OO style. Should I learn Haskell or keep on learning Clojure? Thanks in advance P.D: I am open to any other language.

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• Locate a user's bashrc file

  - by Starkers

  Really confused. Upon running cat etc/passwd I have found this: postgres:x:117:126:PostgreSQL administrator,,,:/var/lib/postgresql:/bin/bash meaning I have a postgres user, right? I want to change the bashrc environment file of this user to make commands available to it. /var/lib/postgresql doesn't contain a bashrc file, and /bin/bash doesn't contain it either, so I don't really know what's going on. All I know is a created postgres using the useradd command, so why do I have some weird user with no home directory? So confused :(

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• Can/should one record unstructured suggestions and feedback in an issue tracker?

  - by Ian Mackinnon

  I'd like to advocate the use of issue-tracking software within an organisation that currently does not use it. But there's one aspect of their situation for which I'm unsure of what to suggest: their projects frequently receive informal verbal feedback or casual comments in meetings or in passing from a wide group of interested parties, and all this information needs to be recorded. Most of these messages are noise, but they're vital to record and share with developers for two reasons: Good suggestions often come out of this process. It can be necessary to have evidence of clients' comments when they forget previous instructions or change their mind. Is this the sort of information that should be stored in an issue-tracking system, or kept apart in a separate solution? Are there issue-tracking systems that have particularly good support for this sort of unstructured information?

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• Skype does not save configuration

  - by varsketiz

  Hello, on ubuntu 10.10, I have recently started to experience this problem: for some reason skype wont save any settings except "sign in on startup" when skype starts and tries to sign in it is unsuccessful (it shows incorrect password, in red) every time. no matter if I have provided good password the last time. I always have to click to show contacts in groups, it does not remember it. Every time I have to go to options and update some notification settings. I know all these things should be "remembered" by skype - this problem started only recently. I don't recall fiddling with any permissions that could have likely caused that. Do you know what the problem might be? I tried uninstall (marking complete configuration removal) and install fresh, but it still remembers my username (why??) Can I find skype configuration files on the filesystem somewhere and change permissions for them - or even better - edit the files to set what I want..?

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• Switching songs - MediaPlayer lags the game

  - by Fibericon

  When the player encounters a boss in the game I'm working on, I want to have the music change. It seems simple enough with the MediaPlayer class to fade out the current song, switch to another, and then fade the new song in. However, at the point where the second song starts, the game freezes for a split second. The songs in question aren't particularly large either - the first song is 1.7mb and the second song is 3.1mb, both mp3 format. This is the code I'm using to do it: protected void switchSong(GameTime gameTime) { if (!bossSongPlaying) { MediaPlayer.Volume -= ((float)gameTime.ElapsedGameTime.TotalSeconds/10); if (MediaPlayer.Volume < 0.05f) { MediaPlayer.Play(bossSong); MediaPlayer.Volume = 1.0f; bossSongPlaying = true; } } } What can I do to eliminate that momentary hang?

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• Update drivers for TL-WN851ND

  - by Tony_GPR

  Today I bought a new PCI wireless card, TP-Link WN851ND, with Atheros AR9227 chipset. It has 2 antennas and is compatible with Wifi N so I thought it would improve the quality of the signal. But after install it on my computer the result is the opposite to expected. It doesn't connect to my network, while my old Wifi BG card connect without problems, I created an access point from my smartphone to try the card, and work, but is very slow loading pages. In Windows 7 works perfectly, so I think the problem is the driver. I have Ubuntu 12.04 LTS with kernel 3.2.0.31, is there a way to update the driver or I can apply a patch to improve the performance of the card? Otherwise, anyone know if there is a work in progress to improve compatibility with this chipset, or is it better to change the card and buy one with better driver compatibility. And finally, which wireless N compatible chipsets have good support under Linux/Ubuntu?

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• Manually updating HTML5 local storage?

  - by hustlerinc

  I'm just starting out HTML5 game developement (and game dev in general) and watching all the videos and tutorials available something has crossed my mind. Everyone keep saying I should set the cookie's (or cached files) to be expired after a certain amount of time. So that when it reaches that time the browser automatically downloads all assets again, even if it's the same asset's. Wouldn't it be possible to manually define the version of the game? For example the user has downloaded all the files for 1.01 of the game, when updating I change a simple variable to 1.02. When the user logs in it would compare his version to the current and if they are not equal only then it downloads the files? This could even be improved to download only specific files depending on what needs to be updated? Would this be possible or am I just dreaming? What are the possible downsides of this approach?

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• Xrandr settings don't stick; bash script fails; Nvidia; disper doesn't work

  - by bcmcfc

  I have an Nvidia graphics card. Yeah, I know. This might have to change soon. I am trying to get the resolution to set correctly on my second monitor, which is a VGA monitor with a native resolution of 1440x900. I have set up this bash script which doesn't work: xrandr --newmode "1440" 106.50 1440 1528 1672 1904 900 903 909 934 -hsync +vsync xrandr --addmode -display VGA-1 1440 xrandr --output VGA-1 --mode 1440 It outputs: xrandr: cannot find mode 1440. It has worked previously when running the commands individually but after a restart it fails. I've also just installed disper as per this question but have no idea how to use it - the help suggests the command: disper -d VGA-1 -r "1440x900" should work, but it does not. It just outputs the help text, suggesting something is wrong but not saying what. Is there any way to get these horrific Nvidia drivers working properly with a resolution that is not detected by the tools?

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• Compiz and Clearlooks window border breaks active/inactive title bars

  - by jimbo1qaz

  When I turn on Compiz with the Compiz tray switcher and I use Clearlooks, Dust Sand, or possibly any title bar style that normally has window icons on right, some window title bars will not change. Instead, they stay selected or unselected randomly. Some windows, like Ubuntu Software Center and CCSM are unaffected. This problem only happens with GTK window manager. I am using the Malteworld compiz ppa for Emerald. The problem does not happen with plain Metacity, or a title bar style that normally has close button on right. Edit: It still happens with Emerald. Reinstalled with upgrade option (yeah, 11.04 to 11.04) and still same problem. So maybe faulty package?

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• Microsoft Access 2010: How to Format Forms

  For the purpose of this tutorial, we will be working on formatting a form that people can use to enter in a customer's information. As is, the form is decent and usable, but what if you want to change its look around so that it has a custom look? What if you want to tweak its settings so that it better reflects your company or brand? That is exactly what we are about to do. The process is very simple and can even be a bit fun as you get creative with it. The reasoning behind formatting a form in Microsoft Access 2010 is rather logical. If someone is going to be using a form on a daily bas...

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• SFML title bar with weird characters when using UTF-8

  - by TheOm3ga

  (Previously asked at http://stackoverflow.com/questions/4922478/sfml-title-bar-with-weird-characters-when-using-utf-8) I've just started using SFML and one of the first problems I've come across is some weird characters on the the titlebar whenever I try to use accents or any other extended char. For instance, I've got: sf::RenderWindow Ventana(sf::VideoMode(800, 600, 32), "Año nuevóóó"); And the titlebar renders like AÂ+o nuevoA³A³A³ This ONLY HAPPENS if my source code file is enconded in UTF-8. If I change the file encoding to ISO-8859-1, it shows properly. Obviously all of my files use UTF-8, as its the system-wide encoding. I'm using GCC under Ubuntu GNU/Linux. I've tried using the different utilities in sf::Unicode to adapt the text, but none of them seems to work.

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• Ubuntu 12.04 update + VirtualBox VM 4.1.14 r77440 - No input

  - by Gubatron

  I can only enter my password with the keyboard and this is what I see after I login If I try to switch to a terminal with CtrlAlt+F1 I get this I don't have a clue how to fix this, or if it's even possible to fix this without access to a terminal. The recovery console does not work either. It opens, but keyboard input doesn't seem to be working for it either. Anybody had this happened? Update (next day) Keyboard input lets me do Alt+F2 and invoke a terminal, but I can't change focus to the terminal window that opens. Any tip on how to switch focus (Alt+Tab wont work) to the terminal window. Maybe looking at this you might have a clue what's going on, maybe there's no window manager loading?

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• Why there suddenly were so many 400 request in my access log?

  - by LotusH

  Below are little part of my access_log 118.186.8.50 - - [19/Dec/2011:22:42:57 +0800] "-" 400 0 "-" "-" 05 118.186.8.50 - - [19/Dec/2011:22:42:57 +0800] "-" 400 0 "-" "-" 06 118.186.8.50 - - [19/Dec/2011:22:42:57 +0800] "-" 400 0 "-" "-" 07 118.186.8.50 - - [19/Dec/2011:22:42:57 +0800] "-" 400 0 "-" "-" 08 118.186.8.50 - - [19/Dec/2011:22:42:57 +0800] "-" 400 0 "-" "-" 09 220.173.136.39 - - [19/Dec/2011:22:43:22 +0800] "-" 400 0 "-" "-" 10 220.173.136.39 - - [19/Dec/2011:22:43:22 +0800] "-" 400 0 "-" "-" 11 220.173.136.39 - - [19/Dec/2011:22:43:22 +0800] "-" 400 0 "-" "-" 12 220.173.136.39 - - [19/Dec/2011:22:43:22 +0800] "-" 400 0 "-" "-" 13 220.173.136.39 - - [19/Dec/2011:22:43:22 +0800] "-" 400 0 "-" "-" 14 220.173.136.39 - - [19/Dec/2011:22:43:22 +0800] "-" 400 0 "-" "-" And the volume was very huge, some like one hundred thousand of these 400 request per second. And I'm pretty sure there are no errors on my site in that period of time.(No error report and I didn't change the source code)

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• Menu bars are a basic light gray after installing graphics card driver. [closed]

  - by Jonathan

  Possible Duplicate: Desktop forgets theme? Hi, I've just installed Ubuntu 10.10 64-bit. It came up saying I could install 2 proprietary drivers, one for my WiFi adapter (which works perfectly) and one for my graphics card - a Sapphire AIT Radeon HD 5770 1024MB GDDR5 PCI-Express Graphics Card. The driver is called ATI/AMD proprietary FGLRX graphics driver. Before installing this driver I was unable to have Extra Visual Effects in Appearances. However after installing (and restarting) the menu bars are now in a basic light gray mode, rather than the sleek Ubuntu black. - Although Extra Visual Effects does now work. I've tried rebooting, and I've had a look around in ATI "Catalyst Control Center" but nothing has worked so far. Does anybody know what this windows mode is, how to change it back to normal and why it's doing it in the first place? Below is a screenshot of my computer: (This is also the first time I've installed Ubuntu on my computer, and am keen for it to work.)

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• Isometric smooth fog

  - by marcg11

  I'm working on a simple 2d game with direct3d 9. It's a isometric game with diamond tiles and a staggered map. This is what I have: As you se I have some king of fog which is acomplished by having a fog matrix which is true (clear terrain) or false (obscure terran). But the result is very chunky. The fog moves as the player moves by tiles but not by pixels. Basically I check for every tile if there is fog, if so I just change the color of that tile: if(scene->fog[i+mapx][j+mapy] == FOG_NONE) { tile_color = 0x666666FF; } I also would like the fog to be smoother, for that I followed this "tutorial" but I haven't managed to work it it out. http://www.appsizematters.com/2010/07/how-to-implement-a-fog-of-war-part-2-smooth/

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• Visual Studio 2010 Zooming Keyboard Commands, Global Zoom

  One of my favorite features in Visual Studio 2010 is zoom. It first caught my attention as a useful tool for screencasts and presentations, but after getting used to it Im finding that its really useful when Im developing letting me zoom out to see the big picture, then zoom in to concentrate on a few lines of code. Zooming without the scroll wheel The common way youll see this feature demonstrated is with the mouse wheel you hold down the control key and scroll up or down to change font size....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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• Set secondary receiver in PayPal Chained Payment after the initial transaction

  - by CJxD

  I'm running a service whereby customers seek the services of 'freelancers' through our web platform. The customer will make a 'bid' which is immediately taken from their accounts as security. Once the job is completed, the customer marks it as accepted and the bid gets distributed to the freelancer(s) as a reward. After initially storing these rewards in the accounts of the freelancers and relying on MassPay to sort out paying them later, I realised that your business needs to be turning over at least £5000/month before MassPay is switched on. Instead, I was referred to Delayed Chained Payments in PayPal's Adaptive Payments API. This allows the customer to pay the primary receiver (my business) before the payment is later triggered to be sent to the secondary receivers (the freelancers). However, at the time that the customer initiates this transaction, you must understand that nobody yet knows who will receive the reward. So, before I program this whole Adaptive Payments system, is it even possible to change or add the secondary receivers after the customer has paid? If not, what can I do?

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• Checking whether the user input is a str in Python [migrated]

  - by Sahil Babbar

  I checked various questions on Stack Overflow but one thing every logic lacks. Let me demonstrate using Python: while True: user_input = raw_input() if type(user_input) == str: print 'ERROR' else: print 'BINGO' Also, we cannot use input() in place of raw_input() as it gives the error:Traceback (most recent call last): File ".\test.py", line 3, in <module> user_input = int(input()) File "<string>", line 1, in <module> NameError: name 'asdf' is not defined The problem here is that raw_input converts the user input into string so it always prints 'ERROR' and if I change the second line to user_input = int(raw_input) then, it gives an error: Traceback (most recent call last): File ".\test.py", line 3, in <module> user_input = int(raw_input()) ValueError: invalid literal for int() with base 10: 'asdf' I tried this with try and except but it shall work fine to check integer but not a string. I feel that this question may be marked as a duplicate but I think that this query is important, if logically taken.

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• Difference between () and [] in Perl6 [migrated]

  - by Ask and Learn

  Learning Perl 6 and had trouble to understand following Perl 6 one liner. version of Perl 6 - rakudo-star: stable 2014.04 (bottled) This works fine, array/list is sorted [njia@mb-125:~] : perl6 -e 'say [2443,5,33, 90, -9, 2, 764].sort' -9 2 5 33 90 764 2443 But this does not sort the array/list, if [].sort works why @s.sort does not? [njia@mb-125:~] : perl6 -e 'my @s = [2443,5,33, 90, -9, 2, 764]; @s.sort.say' 2443 5 33 90 -9 2 764 Change from [] to () [njia@mb-125:~] : perl6 -e 'my @s = (2443,5,33,90,-9,2,764); @s.sort.say' -9 2 5 33 90 764 2443

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• I want to be a programmer! [closed]

  - by Mohamed Abd El Maged

  I am a doctor. I have a bachelor of medicine and general surgery. I want to change my career and work as a programmer in big companies such as Microsoft, Oracle, ... this is my dream ! I haven't got any degree in IT or Computer science. The question here is: Is it possible to achieve my dream and work as professional programmer in the future? Another question: if applicable, which certifications should I strive to get?

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