Search Results

Search found 23271 results on 931 pages for 'static classes'.

Page 588/931 | < Previous Page | 584 585 586 587 588 589 590 591 592 593 594 595  | Next Page >

  • XNA 4: RenderTarget2D textures getting transparent on fullscreen

    - by Shashwat
    I'm generating a Texture2D object using RenderTarget2D as in the following code public static Texture2D GetTextTexture(string text, Vector2 position, SpriteFont font, Color foreColor, Color backColor, Texture2D background=null) { int width = (int)font.MeasureString(text).X; int height = (int)font.MeasureString(text).Y; GraphicsDevice device = Settings.game.GraphicsDevice; SpriteBatch spriteBatch = Settings.game.spriteBatch; RenderTarget2D renderTarget = new RenderTarget2D(device, width, height, false, SurfaceFormat.Color, DepthFormat.Depth24Stencil8, device.PresentationParameters.MultiSampleCount, RenderTargetUsage.DiscardContents); device.SetRenderTarget(renderTarget); device.Clear(backColor); spriteBatch.Begin(SpriteSortMode.Immediate, BlendState.Opaque); if (background != null) spriteBatch.Draw(background, new Rectangle(0, 0, 70, 70), Color.White); spriteBatch.End(); spriteBatch.Begin(); spriteBatch.DrawString(font, text, position, foreColor, 0, new Vector2(0), 0.8f, SpriteEffects.None, 0); spriteBatch.End(); device.SetRenderTarget(null); ResetGraphicsDeviceSettings(); return (Texture2D)renderTarget; } It's working all fine. But when I ToggleFullScreen() (and vice-versa), the previous textures are getting transparent. However, the new textures after that are being generated correctly. What can be the reason for this?

    Read the article

  • Why does my mic boost automatically go to 100 on every boot?

    - by Ben
    When my computer turns on, it automatically sets the "mic boost" sound setting to 100. This causes a loud static sound in my speakers. I can manually go to alsamixer and turn the mic boost down manually, but I would prefer it if I didn't have to do this every time I turn the computer on. I've tried running sudo alsactl store after fixing the settings, and this does save them, but I have to run sudo alsactl restore to restore the settings. This means that I have to manually fix the sound every time I start the computer anyway, so it isn't really a fix. I tried putting sudo alsactl restore in my startup programs, but that didn't seem to fix anything. I'm running Ubuntu 12.04, but I started having this problem before upgrading from 11.10. I'm using a Sony Vaio laptop. I'm not really sure what made it start; it seemed like I just started having the problem randomly one day. Any help would be appreciated! Edit: here is the output from running amixer: http://paste.ubuntu.com/1060080/

    Read the article

  • Domain redirection to port on Windows Server 2008

    - by Rauffle
    I have a Windows server running IIS. I wish to run a piece of software that hosts a web interface on a non-standard HTTP port (let's say, port 9999). I have static DNS entries on my router for two FQDNs, both of which direct to the Windows server. I wish to have requests to 'website1' to continue to go to the IIS website on port 80, but requests for 'website2' to instead go to port 9999 to be handled by the other application. How can I accomplish this? Right now I can get to the application by going to 'website1:9999' or 'website2:9999'.

    Read the article

  • How can HAProxy improve availibility, or "how can I prevent my site from going down"? [closed]

    - by Joe Hopfgartner
    I am aware of what HAProxy does, but what if my HAproxy goes down? Or what if my DNS servers go down? Yes, dns is less the problem. However dns only solves to an IP and an IP is announced via BGP to be routed over some router. What if that router goes down? Of course if I have complicated application servers that are likely to fail HAProxy can significantly improve uptime. But my application isnt. In fact my application may very well just be delivering a small static html file via HTTP. Basically if any user anywhere types in MYDOMAIN.COM, I want the user to get SOMETHING on the screen other than a timeout or DNS resolution error. How can I do that? The point of entry is difficult. The so called "initial closure mechanism".

    Read the article

  • Configure FTP Server with two different IP addresses on different subnets and separate NICs

    - by Luke
    I have an FTP server that's on a low bandwidth connection. We want to set it up with a second IP address on a much higher bandwidth connection. I set up the second interface with a static IP address on the faster connection. This unfortunately does not work. I can verify that the second IP address works perfectly when I disable the first IP address. What do I need to do to get two separate interface IP addresses on different subnets working on the same server?

    Read the article

  • How to deal with elimination of duplicate logic vs. cost of complexity increase?

    - by Gabriel
    I just wrote some code that is very representative of a recurring theme (in my coding world lately): repeated logic leads to an instinct to eliminate duplication which results in something that is more complex the tradeoff seems wrong to me (the examples of the negative side aren't worth posting - but this is probably the 20th console utility I've written in the past 12 months). I'm curious if I'm missing some techniques or if this is really just on of those "experience tells you when to do what" type of issues. Here's the code... I'm tempted to leave it as is, even though there will be about 20 of those if-blocks when I'm done. static void Main(string[] sargs) { try { var urls = new DirectTrackRestUrls(); var restCall = new DirectTrackRestCall(); var logger = new ConsoleLogger(); Args args = (Args)Enum.Parse(typeof(Args), string.Join(",", sargs)); if (args.HasFlag(Args.Campaigns)) { var getter = new ResourceGetter(logger, urls.ListAdvertisers, restCall); restCall.UriVariables.Add("access_id", 1); getter.GotResource += new ResourceGetter.GotResourceEventHandler(getter_GotResource); getter.GetResources(); SaveResources(); } if (args.HasFlag(Args.Advertisers)) { var getter = new ResourceGetter(logger, urls.ListAdvertisers, restCall); restCall.UriVariables.Add("access_id", 1); getter.GotResource += new ResourceGetter.GotResourceEventHandler(getter_GotResource); getter.GetResources(); SaveResources(); } if (args.HasFlag(Args.CampaignGroups)) { var getter = new ResourceGetter(logger, urls.ListCampaignGroups, restCall); getter.GotResource += new ResourceGetter.GotResourceEventHandler(getter_GotResource); getter.GetResources(); SaveResources(); } } catch (Exception e) { Console.WriteLine(e.InnerException); Console.WriteLine(e.StackTrace); }

    Read the article

  • Software that can identify and remove foreground objects from image

    - by Antonio2011a
    I am interested in removing extraneous objects from an image. More specifically the situation is that there is a series of images of a particular background. In each image there are objects in the foreground, however these objects differ across the series of images in terms of their location. Note that some objects always exists in the foreground. The background is static. An example might be a busy tourist spot and you want to remove the people or tourist buses from the image. I'd like the software to take the series of images and as much as possible reconstruct the background. Is there software available that has this capability? If so what are the steps necessary to use that functionality? Similarly if anyone knows a lot about image processing, are there any image processing algorithms that could handle this? Thanks.

    Read the article

  • why do I get this mail server configuration error?

    - by Francesco
    <<The configuration of your mail servers and your DNS are not ok! The report of the test is: mail.mydomain.com. -> mydomain.com -> 78.47.63.148 -> static.148.63.47.78.clients.your-server.de Spam recognition software and RFC821 4.3 (also RFC2821 4.3.1) state that the hostname given in the SMTP greeting MUST have an A record pointing back to the same server.>> I have a A Record that points mail.mydomain.com to 78.47.63.148 (which is my given ip address for my vps) All other records are fine, so what's wrong and what record should I create to make it right? Thanks

    Read the article

  • Unable to change IP address for eth0 without restart in Ubuntu

    - by Rodnower
    I have Ubuntu 12.04.1 installed. I tried to change the IP address of the interface eth0 in /etc/network/interfaces from 192.168.1.3 to 192.168.1.4 auto lo iface lo inet loopback pre-up iptables-restore < /etc/iptables.up.rules auto eth0 iface eth0 inet static address 192.168.1.4 gateway 192.168.1.1 netmask 255.255.255.0 network 192.168.1.0 broadcast 192.168.1.255 sudo service networking status When I issue: sudo service networking restart I get this response: stop: Unknown instance: networking stop/waiting And IP remains 192.168.1.3: eth0 Link encap:Ethernet HWaddr 00:1e:33:71:cd:a4 inet addr:192.168.1.3 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::21e:33ff:fe71:cda4/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:3861 errors:0 dropped:0 overruns:0 frame:0 TX packets:3291 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:3423285 (3.4 MB) TX bytes:521854 (521.8 KB) Interrupt:45 Base address:0x4000 Only after restart does the IP change. Any ideas?

    Read the article

  • vps running out of memory, 200MB free

    - by demon
    At the beginning of this year I took a VPS for my website because I was running against the resource limits from a shared hosting. Here are the things I know: 2GB memory, with 1GB swap Debian X64 server ED installed Software running on the webserver: mysql apache postfix pop3 imap amavisd clamd cron fail2ban munin-node pure-ftpd spamd nginx Now for the setup: Nginx listens on port 80 and handles the static files, the php side is done by apache2 running mod_php in combi with apc(no var caching!). Iam using a pretty 'busy' drupal and phpbb stack on the server, for drupal iam using boost and authcache to handle of the server load with a pressflow stack. phpbb is just phpbb3 with some mods installed, but has at max 30 users online at a time.. The problem is that its staring to use the swap after a few days after a reboot and thus the site becomes slower. I'v added pictures of monit and munin, so maybe somebody can help me out... Monit: Munin:

    Read the article

  • Java game design question (graphical objects)

    - by vemalsar
    Hello Guys, I'm beginner in game development, in Java and here on this site too and I have a game design question. Please comment my idea: I have a main loop which call update and draw method. I want to use an ArrayList which store graphical objects, they have coordinate and image or text to draw and my game objects extends this class. In update, I can choose which objects should be put in the array and in draw method I'll display the elements of array on the screen. I'm using a buffer and draw first there, but it is not important now I guess...Here is a simple (not full) code, only the logic: public class GamePanel extends JPanel implements KeyListener { ArrayList<graphicalObjects> graphArray = new ArrayList<graphicalObjects>(); public void update() { //change the game scene, update the graphArray, process input etc. } public void draw() { //draws every element of graphArray to a JPanel } public static main(String[] args) { while(true) { update(); draw(); } } } My questions: Should have I use interface or abstract class for graphicalObjects? graphicalObjects class and the ArrayList really needs or there is some better solution? How to draw objects? They draw themself with their own method or in the draw method I have to draw manually based on graphicalObjects variables (x,y coordinates, image etc.)? If this conception is wrong, please suggest another one! All comments are welcome and sorry if this is dumb question, thanks!

    Read the article

  • Iscroll Wrapper doesnt get a height

    - by MCSell
    I got the following code: <div data-role="content" height="100%" data-iscroll> <div class="homebutton_zeile"> <a id="picture_home" href="#pictrues"> <div class="homebutton_all"> <div class="homebutton_name">Picture</div> <div class="homebutton_picture"> <img src="images/picture.png" alt="image" style="position: relative;"> </div> </div> </a> </div> </div> </div> My Classes of CSS .homebutton_zeile{ width: 100%; height: 30%; } .homebutton_all{ width: 30%; height: 90%; float:left; margin-left: 2%; margin-top:15px; } .homebutton_picture{ position: relative; width: 100%; height: 85%; float: left; background-color: #AAC7BD; border: 1px solid black; border-radius: 15px; box-shadow:8px 8px 8px #666; } .homebutton_name{ text-align:center; position: relative; top:-10px; width: 100%; height: 15%; margin-left: auto; text-decoration:none; color:black; } I am Using: iscroll.js jquery 1.8.2 jquery mobile 1.2.0 jqery mobile iscrollview. And if its needed to know jstorage.js and fastclick.js But the div above is not getting a height at the wrapper of iscroll. There is also a login before and this page will be shown automatically after the login after a $.mobile.changePage("#home"); function. I tried to do it as first page before the function of changePage and it gave me the same effect. If i put a   for example after the <div data-role="content" height="100%" data-iscroll>&nbps; The Wrapper get a height of 15px for the &nbps; but not for the images inside.

    Read the article

  • HTML Tidy in NetBeans IDE (Part 2)

    - by Geertjan
    This is what I was aiming for in the previous blog entry: What you can see above (especially if you click to enlarge it) is that I have HTML Tidy integrated into the NetBeans analyzer functionality, which is pluggable from 7.2 onwards. Well, if you set an implementation dependency on "Static Analysis Core", since it's not an official API yet. Also, the scopes of the analyzer functionality are not pluggable. That means you can 'only' set the analyzer's scope to one or more projects, one or more packages, or one or more files. Not one or more folders, which means you can't have a bunch off HTML files in a folder that you access via the Favorites window and then run the analyzer on that folder (or on multiple folders). Thus, to try out my new code, I had to put some HTML files into a package inside a Java application. Then I chose that package as the scope of the analyzer. Then I ran all the analyzers (i.e., standard NetBeans Java hints, FindBugs, as well as my HTML Tidy extension) on that package. The screenshot above is the result. Here's all the code for the above, which is a port of the Action code from the previous blog entry into a new Analyzer implementation: import java.io.IOException; import java.io.PrintWriter; import java.io.StringWriter; import java.util.ArrayList; import java.util.Collections; import java.util.List; import javax.swing.JComponent; import javax.swing.text.Document; import org.netbeans.api.fileinfo.NonRecursiveFolder; import org.netbeans.modules.analysis.spi.Analyzer; import org.netbeans.modules.analysis.spi.Analyzer.AnalyzerFactory; import org.netbeans.modules.analysis.spi.Analyzer.Context; import org.netbeans.modules.analysis.spi.Analyzer.CustomizerProvider; import org.netbeans.modules.analysis.spi.Analyzer.WarningDescription; import org.netbeans.spi.editor.hints.ErrorDescription; import org.netbeans.spi.editor.hints.ErrorDescriptionFactory; import org.netbeans.spi.editor.hints.Severity; import org.openide.cookies.EditorCookie; import org.openide.filesystems.FileObject; import org.openide.loaders.DataObject; import org.openide.util.Exceptions; import org.openide.util.lookup.ServiceProvider; import org.w3c.tidy.Tidy; public class TidyAnalyzer implements Analyzer {     private final Context ctx;     private TidyAnalyzer(Context cntxt) {         this.ctx = cntxt;     }     @Override     public Iterable<? extends ErrorDescription> analyze() {         List<ErrorDescription> result = new ArrayList<ErrorDescription>();         for (NonRecursiveFolder sr : ctx.getScope().getFolders()) {             FileObject folder = sr.getFolder();             for (FileObject fo : folder.getChildren()) {                 for (ErrorDescription ed : doRunHTMLTidy(fo)) {                     if (fo.getMIMEType().equals("text/html")) {                         result.add(ed);                     }                 }             }         }         return result;     }     private List<ErrorDescription> doRunHTMLTidy(FileObject sr) {         final List<ErrorDescription> result = new ArrayList<ErrorDescription>();         Tidy tidy = new Tidy();         StringWriter stringWriter = new StringWriter();         PrintWriter errorWriter = new PrintWriter(stringWriter);         tidy.setErrout(errorWriter);         try {             Document doc = DataObject.find(sr).getLookup().lookup(EditorCookie.class).openDocument();             tidy.parse(sr.getInputStream(), System.out);             String[] split = stringWriter.toString().split("\n");             for (String string : split) {                 //Bit of ugly string parsing coming up:                 if (string.startsWith("line")) {                     final int end = string.indexOf(" c");                     int lineNumber = Integer.parseInt(string.substring(0, end).replace("line ", ""));                     string = string.substring(string.indexOf(": ")).replace(":", "");                     result.add(ErrorDescriptionFactory.createErrorDescription(                             Severity.WARNING,                             string,                             doc,                             lineNumber));                 }             }         } catch (IOException ex) {             Exceptions.printStackTrace(ex);         }         return result;     }     @Override     public boolean cancel() {         return true;     }     @ServiceProvider(service = AnalyzerFactory.class)     public static final class MyAnalyzerFactory extends AnalyzerFactory {         public MyAnalyzerFactory() {             super("htmltidy", "HTML Tidy", "org/jtidy/format_misc.gif");         }         public Iterable<? extends WarningDescription> getWarnings() {             return Collections.EMPTY_LIST;         }         @Override         public <D, C extends JComponent> CustomizerProvider<D, C> getCustomizerProvider() {             return null;         }         @Override         public Analyzer createAnalyzer(Context cntxt) {             return new TidyAnalyzer(cntxt);         }     } } The above only works on packages, not on projects and not on individual files.

    Read the article

  • ISO 12207 - testing being only validation activity? [closed]

    - by user970696
    Possible Duplicate: How come verification does not include actual testing? ISO norm 12207 states that testing is only validation activity, while all static inspections are verification (that requirement, code.. is complete, correct..). I did found some articles saying its not correct but you know, it is not "official". I would like to understand because there are two different concepts (in books & articles): 1) Verification is all testing except for UAT (because only user can really validate the use). E.g. here OR 2) Verification is everything but testing. All testing is validation. E.g. here Definitions are mostly the same, as Sommerville's: The aim of verification is to check that the software meets its stated functional and non-functional requirements. Validation, however, is a more general process. The aim of validation is to ensure that the software meets the customer’s expectations. It goes beyond simply checking conformance with the specification to demonstrating that the software does what the customer expects it to do It is really bugging me because I tend to agree that functional testing done on a product (SIT) is still verification because I just follow the requirements. But ISO does not agree..

    Read the article

  • SharePoint 2010 HierarchicalConfig Caching Problem

    - by Damon
    We've started using the Application Foundations for SharePoint 2010 in some of our projects at work, and I came across a nasty issue with the hierarchical configuration settings.  I have some settings that I am storing at the Farm level, and as I was testing my code it seemed like the settings were not being saved - at least that is what it appeared was the case at first.  However, I happened to reset IIS and the settings suddenly appeared.  Immediately, I figured that it must be a caching issue and dug into the code base.  I found that there was a 10 second caching mechanism in the SPFarmPropertyBag and the SPWebAppPropertyBag classes.  So I ran another test where I waited 10 seconds to make sure that enough time had passed to force the caching mechanism to reset the data.  After 10 minutes the cache had still not cleared.  After digging a bit further, I found a double lock check that looked a bit off in the GetSettingsStore() method of the SPFarmPropertyBag class: if (_settingStore == null || (DateTime.Now.Subtract(lastLoad).TotalSeconds) > cacheInterval)) { //Need to exist so don't deadlock. rrLock.EnterWriteLock(); try { //make sure first another thread didn't already load... if (_settingStore == null) { _settingStore = WebAppSettingStore.Load(this.webApplication); lastLoad = DateTime.Now; } } finally { rrLock.ExitWriteLock(); } } What ends up happening here is the outer check determines if the _settingStore is null or the cache has expired, but the inner check is just checking if the _settingStore is null (which is never the case after the first time it's been loaded).  Ergo, the cached settings are never reset.  The fix is really easy, just add the cache checking back into the inner if statement. //make sure first another thread didn't already load... if (_settingStore == null || (DateTime.Now.Subtract(lastLoad).TotalSeconds) > cacheInterval) { _settingStore = WebAppSettingStore.Load(this.webApplication); lastLoad = DateTime.Now; } And then it starts working just fine. as long as you wait at least 10 seconds for the cache to clear.

    Read the article

  • How to prioritize related game entity components?

    - by Paul Manta
    I want to make a game where you have to run over a bunch of zombies with your car. When moving around, the zombies have a few things to take into consideration: When there's no player around they might just roam about randomly. And even when some other component dictates a specific direction, they should wobble to the left and right randomly (like drunk people). This implies a small, random, deviation in their movement. They should avoid static obstacles. When they see they are headed towards a wall, they should reorient themselves. They should avoid the car. They should try to predict where the car will be based on its velocity and try to move out of the way. When they can, they should try to get near the player. All these types of decisions they have to do seem like they should be implemented in different components. But how should I manage them? How can I give different components different weights that reflect the importance of each decision (in a given situation)? I would need some other component that acts as a manager, but do you have any tips on how I should implement it? Or maybe there's a better solution?...

    Read the article

  • Access Configuration Page of Modem (in bridge mode) through router

    - by Ujjwal Singh
    Given the Network Configuration: Internet (121.243.x.y/27) | (121.243.x.z) Static : Public Global IP Modem Bridge Mode | WiMAX (192.168.1.1/24) +169.254.1.1/24 : Modem Configuration Page | (192.168.1.2) Router DLink DIR 615 | Ethernet + WiFi (192.168.0.1/24) | Local network (192.168.0.2) Workstation Ethernet | no WiFi Is there any way, maybe using Routing Tables, to access the Modem configuration page at 169.254.1.1 from my local network, using a Windows 7 PC? Note that the modem is currently able to display its configuration page at 169.254.1.1, i.e. even while it is in bridge mode.

    Read the article

  • Consume an XML Feed with PowerPoint 2010

    - by Matt Schweers
    Hi there. I'm looking for a way to consume an XML feed from a web-service directly into PowerPoint 2010. I found the LiveWeb plugin (http://skp.mvps.org/liveweb.htm) for PowerPoint that, while pretty cool, really only pulls in actual web content in a way that feels more like an iframe. Ideally, I would like to consume raw XML web service/feed with PowerPoint, parse it, and stylize the results. Is this possible? Even reading from a static XML file would be a good start.

    Read the article

  • PHP - Internal APIs/Libraries - What makes sense?

    - by Mark Locker
    I've been having a discussion lately with some colleagues about the best way to approach a new project, and thought it'd be interesting to get some external thoughts thrown into the mix. Basically, we're redeveloping a fairly large site (written in PHP) and have differing opinions on how the platform should be setup. Requirements: The platform will need to support multiple internal websites, as well as external (non-PHP) projects which at the moment consist of a mobile app and a toolbar. We have no plans/need in the foreseeable future to open up an API externally (for use in products other than our own). My opinion: We should have a library of well documented native model classes which can be shared between projects. These models will represent everything in our database and can take advantage of object orientated features such as inheritance, traits, magic methods, etc. etc. As well as employing ORM. We can then add an API layer on top of these models which can basically accept requests and route them to the appropriate methods, translating the response so that it can be used platform independently. This routing for each method can be setup as and when it's required. Their opinion: We should have a single HTTP API which is used by all projects (internal PHP ones or otherwise). My thoughts: To me, there are a number of issues with using the sole HTTP API approach: It will be very expensive performance wise. One page request will result in several additional http requests (which although local, are still ones that Apache will need to handle). You'll lose all of the best features PHP has for OO development. From simple inheritance, to employing the likes of ORM which can save you writing a lot of code. For internal projects, the actual process makes me cringe. To get a users name, for example, a request would go out of our box, over the LAN, back in, then run through a script which calls a method, JSON encodes the output and feeds that back. That would then need to be JSON decoded, and be presented as an array ready to use. Working with arrays, as appose to objects, makes me sad in a modern PHP framework. Their thoughts (and my responses): Having one method of doing thing keeps things simple. - You'd only do things differently if you were using a different language anyway. It will become robust. - Seeing as the API will run off the library of models, I think my option would be just as robust. What do you think? I'd be really interested to hear the thoughts of others on this, especially as opinions on both sides are not founded on any past experience.

    Read the article

  • Frequent connection drops when playing online games (StarCraft 2, Battlefield 3) and behind NAT - how to diagnose? [migrated]

    - by Moshev
    I am having some trouble with (I suspect) my wireless router. It's connected to the internet with a regular lan cable and has a static, public IP address. Our two home PCs connect to the router with regular lan cables, plus there's a laptop which connects over wifi. diagram: Internet | | <- isp-supplied cat5 ethernet cable | D-Link D300 ...wifi... laptop / \ / <- cable -> \ PC1 PC2 The PCs and laptop are behind NAT and share the router's public IP. The router is a D-Link D300. PC1 is used for online gaming and I'm experiencing frequent "connection dropped" errors when playing Battlefield 3, StarCraft 2 and the Diablo 3 beta; but not with TeamFortress 2 or the Tribes Ascend beta. The issue goes away when I remove the router and connect PC1 directly to the ISP's cable. I have also tried disconnecting PC2 and the laptop, leaving PC1 as the only machine connected to the router - doesn't help. How can I diagnose what precisely the issue is?

    Read the article

  • Reasons behind polymorphism related behaviour in java

    - by Shades88
    I read this code somewhere class Foo { public int a; public Foo() { a = 3; } public void addFive() { a += 5; } public int getA() { System.out.println("we are here in base class!"); return a; } } public class Polymorphism extends Foo{ public int a; public Poylmorphism() { a = 5; } public void addFive() { System.out.println("we are here !" + a); a += 5; } public int getA() { System.out.println("we are here in sub class!"); return a; } public static void main(String [] main) { Foo f = new Polymorphism(); f.addFive(); System.out.println(f.getA()); // SOP 1 System.out.println(f.a); // SOP 2 } } For SOP1 we get answer 10 and for SOP2 we get answer 3. Reason for this is that you can't override variables whereas you can do so for methods. This happens because type of the reference variable is checked when a variable is accessed and type of the object is checked when a method is accessed. But I am wondering, just why is it that way? Can anyone explain me what is the reason for this behaviour

    Read the article

  • Is return-type-(only)-polymorphism in Haskell a good thing?

    - by dainichi
    One thing that I've never quite come to terms with in Haskell is how you can have polymorphic constants and functions whose return type cannot be determined by their input type, like class Foo a where foo::Int -> a Some of the reasons that I do not like this: Referential transparency: "In Haskell, given the same input, a function will always return the same output", but is that really true? read "3" return 3 when used in an Int context, but throws an error when used in a, say, (Int,Int) context. Yes, you can argue that read is also taking a type parameter, but the implicitness of the type parameter makes it lose some of its beauty in my opinion. Monomorphism restriction: One of the most annoying things about Haskell. Correct me if I'm wrong, but the whole reason for the MR is that computation that looks shared might not be because the type parameter is implicit. Type defaulting: Again one of the most annoying things about Haskell. Happens e.g. if you pass the result of functions polymorphic in their output to functions polymorphic in their input. Again, correct me if I'm wrong, but this would not be necessary without functions whose return type cannot be determined by their input type (and polymorphic constants). So my question is (running the risk of being stamped as a "discussion quesion"): Would it be possible to create a Haskell-like language where the type checker disallows these kinds of definitions? If so, what would be the benefits/disadvantages of that restriction? I can see some immediate problems: If, say, 2 only had the type Integer, 2/3 wouldn't type check anymore with the current definition of /. But in this case, I think type classes with functional dependencies could come to the rescue (yes, I know that this is an extension). Furthermore, I think it is a lot more intuitive to have functions that can take different input types, than to have functions that are restricted in their input types, but we just pass polymorphic values to them. The typing of values like [] and Nothing seems to me like a tougher nut to crack. I haven't thought of a good way to handle them. I doubt I am the first person to have had thoughts like these. Does anybody have links to good discussions about this Haskell design decision and the pros/cons of it?

    Read the article

  • Web dev/programmer with 4.5 yrs experience. Better for career: self-study or master's degree? [closed]

    - by Anonymous Programmer
    I'm a 28 year-old web developer/programmer with 4.5 years of experience, and I'm looking to jump-start my career. I'm trying to decide between self-study and a 1-year master's program in CS at a top school. I'm currently making 65K in a high cost-of-living area that is NOT a hot spot for technology firms. I code almost exclusively in Ruby/Rails, PHP/CodeIgniter, SQL, and JavaScript. I've slowly gained proficiency with Git. Roughly half the time I am architecting/coding, and half the time I am pounding out HTML/CSS for static brochureware sites. I'd like to make more more money while doing more challenging/interesting work, but I don't know where to start. I have an excellent academic record (math major with many CS credits, 3.9+ GPA), GRE scores, and recommendations, so I am confident that I could be admitted to a great CS master's program. On the other hand, there is the tuition and opportunity cost to consider. I feel like there are a number of practical languages/tools/skills worth knowing that I could teach myself - shell scripting, .NET, Python, Node.js, MongoDB, natural language processing techniques, etc. That said, it's one thing to read about a subject and another thing to have experience with it, which structured coursework provides. So, on to the concrete questions: What programming skills/knowledge should I develop to increase my earning potential and make me competitive for more interesting jobs? Will a master's degree in CS from a top school help me develop the above skills/knowledge, and if so, is it preferable to self-study (possibly for other reasons, e.g., the degree's value as a credential)?

    Read the article

  • Rendering multiple squares fast?

    - by Sam
    so I'm doing my first steps with openGL development on android and I'm kinda stuck at some serious performance issues... What I'm trying to do is render a whole grid of single colored squares on to the screen and I'm getting framerates of ~7FPS. The squares are 9px in size right now with one pixel border in between, so I get a few thousand of them. I have a class "Square" and the Renderer iterates over all Squares every frame and calls the draw() method of each (just the iteration is fast enough, with no openGL code the whole thing runs smootlhy at 60FPS). Right now the draw() method looks like this: // Prepare the square coordinate data GLES20.glVertexAttribPointer(mPositionHandle, COORDS_PER_VERTEX, GLES20.GL_FLOAT, false, vertexStride, vertexBuffer); // Set color for drawing the square GLES20.glUniform4fv(mColorHandle, 1, color, 0); // Draw the square GLES20.glDrawElements(GLES20.GL_TRIANGLES, drawOrder.length, GLES20.GL_UNSIGNED_SHORT, drawListBuffer); So its actually only 3 openGL calls. Everything else (loading shaders, filling buffers, getting appropriate handles, etc.) is done in the Constructor and things like the Program and the handles are also static attributes. What am I missing here, why is it rendering so slow? I've also tried loading the buffer data into VBOs, but this is actually slower... Maybe I did something wrong though. Any help greatly appreciated! :)

    Read the article

  • Web log files analyzer

    - by Peter Štibraný
    I already use Google Analytics on my page, but I'd like to get additional info from log files. I've looked at various packages during last days, but nothing impressed me so far. Some requirements: must work on log file level (I use apache combined logs, but can configure apache to produce other types of logs) can generate static reports (windows/linux) or use GUI (windows only) should be easy to add custom user agents, and rerun analysis if it can recognize installation of eclipse plugins from log, that would be big plus understands google serp position referer should not require two days to setup (awstats, I am looking at you) should be still under active developement (i.e. analog isn't good answer) preferrably free, or at not very expensive :-) Any good analyzers programs out there?

    Read the article

< Previous Page | 584 585 586 587 588 589 590 591 592 593 594 595  | Next Page >