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  • should I extend or create instance of the class

    - by meWantToLearn
    I have two classes Class A and Class B in Class A, i have three methods that perform the save, delete and select operation based upon the object I pass them. in Class B I perform the logic operations, such as modification to the property of the object before being passed to the methods of Class A, My problem is in Class B, should it extend Class A, and call the methods of class A , by parent::methodName or create instance of class A and then call Class A does not includes any property just methods. class A{ public function save($obj){ //code here } public function delete($obj){ //code here } public function select($obj){ //code here } } //Should I extend class A, and call the method by parent::methodName($obj) or create an instance of class A, call the method $instanceOfA-methodName($obj); class B extends A{ public function checkIfHasSaved($obj){ if($obj->saved == 'Yes'){ parent::save($obj); //**should I call the method like this** $instanceOFA = new A(); //**or create instance of class A and call without extending class A** instanceOFA->save($obj); } //other logic operations here } }

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  • Can't serve files without extension because they "appear to be script" on IIS7.5

    - by madd0
    I created a certain number of static JSON files with no extension in a subfolder of my site. I want to use them for tests. The problem is that IIS is refusing to serve them because : HTTP Error 404.17 - Not Found The requested content appears to be script and will not be served by the static file handler. The folder is a subfolder of an ASP.NET application and I can't create an application just for it, neither can I change the parent application's application pool. Actually, I don't have access to the IIS configuration other than through the web.config file in the folder in question. I assume there must be a way to get a web server to serve static files, right?

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  • MediaTemple Django Bad Gateway

    - by Eeyore
    I have a site running on GS server on MediaTemple. It's Django/PostgreSQL setup. For some reason from time to time I get Bad Gateway error and I can't figure out what's causing it. What can cause this error? What else can I do to find the cause of the problem? url.access-deny = ( "~", ".inc" ) fastcgi.server = ( "/main.fcgi" => ( "main" => ( "socket" => "/var/tmp/" + appname + ".sock", # don't change this "check-local" => "disable", ) ) ) alias.url = ( "/media/" => "/home/xxx/data/python/django/django/contrib/admin/media/", "/static/" => "/home/xxx/containers/django/site/static/", ) url.rewrite-once = ( "^(/media.*)$" => "$1", "^(/static.*)$" => "$1", "^/favicon\.ico$" => "/media/favicon.ico", "^(/.*)$" => "/main.fcgi$1", ) server.error-handler-404 = "/main.fcgi"

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  • How to name setter that does data conversion?

    - by IAdapter
    I'm struggling with how to name this method, I don't like the "set" prefix, because I feel it should be reserved for normal "dumb" setters and some tools might not like it (i did not check it in checkstyle, pmd, etc., but I got a feeling they won't like it.) for example (in java, but I feel its language agnostic) public void setActionListenerClicked(boolean actionListenerClicked) { this.actionListenerClicked = actionListenerClicked ? "1" : "0"; } The only purpose of this method is ONLY to set, this method is needed and cannot be joined with any other (because of framework used). P.S. I DO know that question is similar to How to name multi-setter?, but I feel its not the same question.

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  • Deprecated vs. Denigrated in JavaDoc?

    - by jschoen
    In the JavaDoc for X509Certificate getSubjectDN() it states: Denigrated, replaced by getSubjectX500Principal(). I am used to seeing Deprecated in the for methods that should not be used any longer, but not Denigrated. I found a bug report about this particular case where it was closed with comment: This isn't a bug. "Deprecated" is meant to be used only in serious cases. When we are using a method that is Deprecated, the general suggested action is to stop using the method. So what is the suggested action when a method is marked as Denigrated?

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  • How to set up VirtualBox Bridged Network on Windows 7 Host?

    - by Tong Wang
    I have virtualbox running on a Windows 2008 server, with a guest running ubuntu 10.04. The ubuntu guest is given a static IP of 192.168.1.4, which also has openssh installed. The guest has bridged network setup, I can ping 192.168.1.4 from any machine in the LAN, the ubuntu guest can also access the LAN. However, when I try to PuTTY into the ubuntu machine, I always get "connection refused". Below are some setup details: ubuntu IP: 192.168.1.4 hosts.allow sshd : 192.168.1.38 hosts.deny ALL : ALL when I the following command, I can see that sshd is listening on port 22: lsof -i tcp:22 Any idea? EDIT: It turned out to be a wrong VirtualBox Bridged Network setup. I give the Ubuntu guest a static IP of 192.168.1.4 (assigned to eth0). Then in the Windows 7 host, in the Network and Sharing Center, there is a new connection named "VirtualBox Host-Only Network" after the bridge is setup, that connection is again given the same static IP of 192.168.1.4. Once I change the "VirtualBox Host-Only Network" to automatically obtain an IP address, it's getting a different IP address of 169.254.249.70(Tentative). And now I can SSH into 192.168.1.4 with no problem, even without touching hosts.allow and hosts.deny. I've also noticed that in the properties windows (see screenshot below) of the "VirtualBox Host-Only Network", the second checkbox, "VirtualBox Bridged Networking Driver" is unchecked. While the same checkbox of the physical NIC (that is bridged to) is checked. So my further question is: is this how VBox bridged networking supposed to be setup? Any rationale behind this? I'd appreciate if someone could provide some explaination on VBox bridged networking setup on Windows host and I'll accept it as an answer.

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  • Is writing comments inside methods not a good practice?

    - by Srini Kandula
    A friend told me that writing comments inside methods is not good. He said that we should have comments only for the method definitions(javadocs) but not inside the method body. It seems he read in a book that having comments inside the code means there is a problem in the code. I don't quite understand his reasoning. I think writing comments inside the method body is good and it helps other developers to understand it better and faster. Please provide your comments.

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  • Making particle bounce off a line with friction

    - by Dlaor
    So I'm making a game and I need a particle to bounce off a line. I've got this so far: public static Vector2f Reflect(this Vector2f vec, Vector2f axis) //vec is velocity { Vector2f result = vec - 2f * axis * axis.Dot(vec); return result; } Which works fine, but then I decided I wanted to be able to change the bounciness and friction of the bounce. I got bounciness down... public static Vector2f Reflect(this Vector2f vec, Vector2f axis, float bounciness) //Bounciness goes from 0 to 1, 0 being not bouncy and 1 being perfectly bouncy { var reflect = (1 + bounciness); //2f Vector2f result = vec - reflect * axis * axis.Dot(vec); return result; } But when I tried to add friction, everything went to hell and back... public static Vector2f Reflect(this Vector2f vec, Vector2f axis, float bounciness, float friction) //Does not work at all! { var reflect = (1 + bounciness); //2f Vector2f subtract = reflect * axis * axis.Dot(vec); Vector2f subtract2 = axis * axis.Dot(vec); Vector2f result = vec - subtract; result -= axis.PerpendicularLeft() * subtract2.Length() * friction; return result; } Any physics guys willing to help me out with this? (if you're not sure what I mean with the friction of a bounce see this: http://www.metanetsoftware.com/technique/diagrams/A-1_particle_collision.swf)

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  • UIM notification area icon in Unity, Oneiric?

    - by James
    When I was using Maverick, it was possible to switch the input method from a UIM indicator applet. Now that I have upgraded to Oneiric, I can't seem to switch the input method even when I open uim-im-switcher-gtk. This is necessary for me because I need to be able to switch back and forth between English and Tibetan and the keyboard shortcuts don't seem to work until after I've changed the input method from the panel first. Is there some way to get a UIM indicator on the Unity panel? This is a major regression for me and makes it impossible to do certain kinds of work in Ubuntu.

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  • Network: Incoming connections work, outgoing fails

    - by anirvan
    i recently set up my own server at home to run Ubuntu 12.04 server ed. on booting up, i noticed that a message related to networking comes up, and the booting process pauses. the message read something like - waiting for network configuration and after a while - waiting another 60 seconds... on booting up, I realised that any command which requires a network connection was not working - ping, apt-get install, etc. on firing the ifup eth0 command, I get the error RTNETLINK answers: File exists. Failed to bring up eth0. I also realised, while searching the web for this problem, that this is probably one of the most common networking related issues - however, most of the questions are around setting up multiple IPs for the same machine. ifdown eth0 also fails, stating that eth0 is not configured. my /etc/network/interfaces file has a simple configuration for a static IP: auto lo iface lo inet loopback auto eth0 iface eth0 inet static address xx.xx.xx.xx netmask xx.xx.xx.xx broadcast xx.xx.xx.xx gateway xx.xx.xx.xx dns-nameservers xx.xx.xx.xx The strangest part of this problem is that, while I can't connect to anything outside, I can ping to this particular server using the static IP configured in the interface file, and, i can even SSH into it! I'm really at ends here with this problem, and any guidance is much appreciated. Thanks!

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  • Laptop is Switching DNS Servers

    - by Steffan Harris
    Ok sometime ago I changed my ip address to a static one because I was bored and I wanted to learn more about static ips. I am running windows xp. My laptop works find on the network that i set up a static ip address, but when i go to another network, the incorrect dns servers are being used. When I enter the option to get a dns server automatically, the internet connection works but only for a short time. After that the dns servers resets to the one i entered manually on a previous network. I did this by going to Network Connection-Right Click Local Area Connection and go to properties-Select TCP/IP - then click the Properties button. At this point i am given the option to Obtain an ip address or obtain and address automatically. My question is how do I resolve this problem of the dns server reseting to the previous one.

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  • overriding implemented base class methods

    - by user793468
    I read somewhere that the chain of inheritance breaks when you alter a behavior from derived class. What does "altering a behavior" mean here? Is overriding an already implemented method in base class considered as "altering behavior"? Or, does the author mean altering method signatures and the output? Also, I ready Duplicating code is not a good practice, and its a maintenance nightmare. Again, does overriding an already implemented method in base class considered "Duplicating code"? If not, what would be considered as "Duplicating code"? I

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  • When designing a job queue, what should determine the scope of a job?

    - by Stuart Pegg
    We've got a job queue system that'll cheerfully process any kind of job given to it. We intend to use it to process jobs that each contain 2 tasks: Job (Pass information from one server to another) Fetch task (get the data, slowly) Send task (send the data, comparatively quickly) The difficulty we're having is that we don't know whether to break the tasks into separate jobs, or process the job in one go. Are there any best practices or useful references on this subject? Is there some obvious benefit to a method that we're missing? So far we can see these benefits for each method: Split Job lease length reflects job length: Rather than total of two Finer granularity on recovery: If we lose outgoing connectivity we can tell them all to retry The starting state of the second task is saved to job history: Helps with debugging (although similar logging could be added in single task method) Single Single job to be scheduled: Less processing overhead Data not stale on recovery: If the outgoing downtime is quite long, the pending Send jobs could be outdated

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  • Package libxul not fount - Kiwix Wikpedia in Ubuntu Precise 12.04

    - by JHOSmAN
    I'm trying to install the service Kiwix but I need a library that is not available for Ubuntu 12.04 LTS Precise leave the log and if someone could tell me how to install Seller would appreciate. kiwix-0.9# ls aclocal.m4 COMPILE config.sub COPYING install-sh ltmain.sh missing static AUTHORS config.guess configure depcomp kiwix Makefile.am README CHANGELOG config.log configure.ac desktop libxul-dev_1.8.1.16+nobinonly-0ubuntu1_all.deb Makefile.in src root@ubuntu-MM061:/home/ubuntu/Escritorio/kiwix-0.9# ./configure checking for a BSD-compatible install... /usr/bin/install -c checking whether build environment is sane... yes checking for a thread-safe mkdir -p... /bin/mkdir -p checking for gawk... no checking for mawk... mawk checking whether make sets $(MAKE)... yes checking whether to enable maintainer-specific portions of Makefiles... no checking for gcc... gcc checking whether the C compiler works... yes checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether gcc accepts -g... yes checking for gcc option to accept ISO C89... none needed checking for style of include used by make... GNU checking dependency style of gcc... gcc3 checking for g++... g++ checking whether we are using the GNU C++ compiler... yes checking whether g++ accepts -g... yes checking dependency style of g++... gcc3 checking for g++... g++ checking for cl... no checking for cl... no checking for Xcode... no checking for jar... jar checking build system type... i686-pc-linux-gnu checking host system type... i686-pc-linux-gnu checking for a sed that does not truncate output... /bin/sed checking for grep that handles long lines and -e... /bin/grep checking for egrep... /bin/grep -E checking for fgrep... /bin/grep -F checking for ld used by gcc... /usr/bin/ld checking if the linker (/usr/bin/ld) is GNU ld... yes checking for BSD- or MS-compatible name lister (nm)... /usr/bin/nm -B checking the name lister (/usr/bin/nm -B) interface... BSD nm checking whether ln -s works... yes checking the maximum length of command line arguments... 1572864 checking whether the shell understands some XSI constructs... yes checking whether the shell understands "+="... yes checking for /usr/bin/ld option to reload object files... -r checking for objdump... objdump checking how to recognize dependent libraries... pass_all checking for ar... ar checking for strip... strip checking for ranlib... ranlib checking command to parse /usr/bin/nm -B output from gcc object... ok checking how to run the C preprocessor... gcc -E checking for ANSI C header files... yes checking for sys/types.h... yes checking for sys/stat.h... yes checking for stdlib.h... yes checking for string.h... yes checking for memory.h... yes checking for strings.h... yes checking for inttypes.h... yes checking for stdint.h... yes checking for unistd.h... yes checking for dlfcn.h... yes checking whether we are using the GNU C++ compiler... (cached) yes checking whether g++ accepts -g... (cached) yes checking dependency style of g++... (cached) gcc3 checking how to run the C++ preprocessor... g++ -E checking for objdir... .libs checking if gcc supports -fno-rtti -fno-exceptions... no checking for gcc option to produce PIC... -fPIC -DPIC checking if gcc PIC flag -fPIC -DPIC works... yes checking if gcc static flag -static works... yes checking if gcc supports -c -o file.o... yes checking if gcc supports -c -o file.o... (cached) yes checking whether the gcc linker (/usr/bin/ld) supports shared libraries... yes checking whether -lc should be explicitly linked in... no checking dynamic linker characteristics... GNU/Linux ld.so checking how to hardcode library paths into programs... immediate checking whether stripping libraries is possible... yes checking if libtool supports shared libraries... yes checking whether to build shared libraries... yes checking whether to build static libraries... yes checking for ld used by g++... /usr/bin/ld checking if the linker (/usr/bin/ld) is GNU ld... yes checking whether the g++ linker (/usr/bin/ld) supports shared libraries... yes checking for g++ option to produce PIC... -fPIC -DPIC checking if g++ PIC flag -fPIC -DPIC works... yes checking if g++ static flag -static works... yes checking if g++ supports -c -o file.o... yes checking if g++ supports -c -o file.o... (cached) yes checking whether the g++ linker (/usr/bin/ld) supports shared libraries... yes checking dynamic linker characteristics... GNU/Linux ld.so checking how to hardcode library paths into programs... immediate checking for ranlib... (cached) ranlib checking whether make sets $(MAKE)... (cached) yes checking for pkg-config... pkg-config checking for perl... perl checking fcntl.h usability... yes checking fcntl.h presence... yes checking for fcntl.h... yes checking float.h usability... yes checking float.h presence... yes checking for float.h... yes checking libintl.h usability... yes checking libintl.h presence... yes checking for libintl.h... yes checking limits.h usability... yes checking limits.h presence... yes checking for limits.h... yes checking stddef.h usability... yes checking stddef.h presence... yes checking for stddef.h... yes checking for stdint.h... (cached) yes checking for stdlib.h... (cached) yes checking for string.h... (cached) yes checking for strings.h... (cached) yes checking sys/socket.h usability... yes checking sys/socket.h presence... yes checking for sys/socket.h... yes checking sys/time.h usability... yes checking sys/time.h presence... yes checking for sys/time.h... yes checking for unistd.h... (cached) yes checking wchar.h usability... yes checking wchar.h presence... yes checking for wchar.h... yes checking for stdbool.h that conforms to C99... yes checking for _Bool... no checking for inline... inline checking for int16_t... yes checking for int32_t... yes checking for int64_t... yes checking for int8_t... yes checking for off_t... yes checking for pid_t... yes checking for size_t... yes checking for uint16_t... yes checking for uint32_t... yes checking for uint64_t... yes checking for uint8_t... yes checking for ptrdiff_t... yes checking vfork.h usability... no checking vfork.h presence... no checking for vfork.h... no checking for fork... yes checking for vfork... yes checking for working fork... yes checking for working vfork... (cached) yes checking for stdlib.h... (cached) yes checking for GNU libc compatible malloc... yes checking for working strtod... yes checking for getcwd... yes checking for gettimeofday... yes checking for memmove... yes checking for memset... yes checking for pow... yes checking for regcomp... yes checking for sqrt... yes checking for strcasecmp... yes checking for strchr... yes checking for strdup... yes checking for strerror... yes checking for strtol... yes Package libxul was not found in the pkg-config search path. Perhaps you should add the directory containing libxul.pc' to the PKG_CONFIG_PATH environment variable No package 'libxul' found Package libxul was not found in the pkg-config search path. Perhaps you should add the directory containinglibxul.pc' to the PKG_CONFIG_PATH environment variable No package 'libxul' found checking for /stable... no checking for "/nsISupports.idl"... no configure: error: unable to find nsISupports.idl apt-get install libxul Leyendo lista de paquetes... Hecho Creando árbol de dependencias Leyendo la información de estado... Hecho E: No se ha podido localizar el paquete libxul

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  • How cloudfront works?

    - by Dharmik Bhandari
    I'm planning to Implement CDN(Content Delivery Network) of Amazon which is known as CloudFront in ASP.NET MVC3 with c#. I've googled about it but little bit confuse about few things mentions below. Is it compulsory that we have to uploads all static resources to CDN Network first and then we can use or Is it manageable by Amazon to crawl site static resources which is predefine folder or directory of sites? Is Amazon automatic update its copies when we anything change in static resources or every time we have to upload updated resources to CDN network.

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  • Loading Entities Dynamically with Entity Framework

    - by Ricardo Peres
    Sometimes we may be faced with the need to load entities dynamically, that is, knowing their Type and the value(s) for the property(ies) representing the primary key. One way to achieve this is by using the following extension methods for ObjectContext (which can be obtained from a DbContext, of course): 1: public static class ObjectContextExtensions 2: { 3: public static Object Load(this ObjectContext ctx, Type type, params Object [] ids) 4: { 5: Object p = null; 6:  7: EntityType ospaceType = ctx.MetadataWorkspace.GetItems<EntityType>(DataSpace.OSpace).SingleOrDefault(x => x.FullName == type.FullName); 8:  9: List<String> idProperties = ospaceType.KeyMembers.Select(k => k.Name).ToList(); 10:  11: List<EntityKeyMember> members = new List<EntityKeyMember>(); 12:  13: EntitySetBase collection = ctx.MetadataWorkspace.GetEntityContainer(ctx.DefaultContainerName, DataSpace.CSpace).BaseEntitySets.Where(x => x.ElementType.FullName == type.FullName).Single(); 14:  15: for (Int32 i = 0; i < ids.Length; ++i) 16: { 17: members.Add(new EntityKeyMember(idProperties[i], ids[i])); 18: } 19:  20: EntityKey key = new EntityKey(String.Concat(ctx.DefaultContainerName, ".", collection.Name), members); 21:  22: if (ctx.TryGetObjectByKey(key, out p) == true) 23: { 24: return (p); 25: } 26:  27: return (p); 28: } 29:  30: public static T Load<T>(this ObjectContext ctx, params Object[] ids) 31: { 32: return ((T)Load(ctx, typeof(T), ids)); 33: } 34: } This will work with both single-property primary keys or with multiple, but you will have to supply each of the corresponding values in the appropriate order. Hope you find this useful!

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  • having 2 ip's on a debian 7 box

    - by David
    I just installed Debian Wheezy on my homeserver. I want to assign 2 ip's to it on the same network interface, 1 static ip (eth0) and 1 dynamic ip (eth0:1). I know it doesn't make much sense but I need it to test something. I edited my /etc/network/interfaces to be like this: auto lo eth0 eth0:1 iface lo inet loopback iface eth0 inet static address 192.168.178.240 network 192.168.178.0 netmask 255.255.255.0 broadcast 192.168.178.255 gateway 192.168.178.1 iface eth0:1 inet dhcp when I bring up eth0:1 (ifup eth0:1) I get the following error (eth0 works fine) Bind socket to interface: No such device Failed to bring up eth0:1. is it even possible to have a dynamic and static ip on the same network adapter?

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  • AndEngine GLES2 - getting Black screen on emulator 4.1

    - by dizworld.com
    I'm new in andengine . I create following code public class MainActivity extends BaseGameActivity { static final int CAMERA_WIDTH = 800; static final int CAMERA_HEIGHT = 480; public Font mFont; public Camera mCamera; //A reference to the current scene public Scene mCurrentScene; public static BaseActivity instance; public EngineOptions onCreateEngineOptions() { instance = this; mCamera = new Camera(0, 0, CAMERA_WIDTH, CAMERA_HEIGHT); return new EngineOptions(true, ScreenOrientation.LANDSCAPE_SENSOR, new RatioResolutionPolicy(CAMERA_WIDTH, CAMERA_HEIGHT), mCamera); } @Override public void onCreateResources(OnCreateResourcesCallback arg0) throws Exception { mFont = FontFactory.create(this.getFontManager(),this.getTextureManager(), 256, 256,Typeface.create(Typeface.DEFAULT, Typeface.BOLD), 32); mFont.load(); } @Override public void onCreateScene(OnCreateSceneCallback arg0) throws Exception { mEngine.registerUpdateHandler(new FPSLogger()); mCurrentScene = new Scene(); Log.v("Scene","enter"); mCurrentScene.setBackground(new Background(0.09804f, 0.7274f, 0.8f)); // return mCurrentScene; } @Override public void onPopulateScene(Scene arg0, OnPopulateSceneCallback arg1) throws Exception { // TODO Auto-generated method stub } } I got code on sites there is returning scene but in AndEngine GLES2 in method onCreateScene() there is no return scene ... so my First run is BLACK .. any suggestion :)

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  • How to search unique dynamic data in a sheet and then copy relevent row in diffrent sheet?

    - by Hemant
    I am getting data from internet (DataFrom Web) In sheet1. Then I disperse that data in to three sheets based on three unique text. Like a,b and c. Rows are copied to sheet a,b and c sheets depending on text (a,b,c) they have. All the rows have one unique text (like url) by which they can be searched. I have added static data corresponding to the row. The problem is when ever internet data is changed (row addition/substitution or randomized). My static data loses its connection with the original row for which it was written. I want to search the data based on one unique key and put it to its original place where it used to be with static data.

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  • How to store a list of Objects that might change in future?

    - by Amogh Talpallikar
    I have set of Objects of the same class which have different values of their attributes. and I need to find the best match from a function under given scenarios out of these objects. In future these objects might increase as well. Quite similar to the way we have Color class in awt. we have some static color objects in the class with diff rgb values. But in my case say, I need to chose the suitable color out of these static ones based on certain criteria. So should I keep them in an arrayList or enum or keep them as static vars as in case of Colors. because I will need to parse through all of them and decide upon the best match. so I need them in some sort of collection. But in future if I need to add another type I will have to modify the class and add another list.add(object) call for this one and then it will violate the open-close principle. How should I go about it ?

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  • ubuntu server in a vm, can't connect to internet

    - by jessh
    I'm attemtping to host my own development web server in a virtual box guest, Ubuntu Server. I would like this virtual machine to be accessible from not only my home network, but outside the LAN as well. As such, I've set up a static IP (so I can later forward ports to this static IP.) My virtual box settings have this vm only using one adapter -- in bridged mode. Here's what my /etc/network/interfaces looks like: iface eth0 inet static address 10.0.1.203 /*this is outside the DHCP range*/ netmask 255.255.255.0 gateway 10.0.1.1 network 10.0.1.0 broadcast 10.0.1.255 dns-nameservers: 8.8.8.8 8.8.8.4 Here's what the output of ifconfig looks like: https://dl.dropbox.com/u/2241201/locker/ubuntu.png My Host is a mac mini, running OS X 10.7. From within the guest, if I ping google.com: $ ping google.com # outputs 'ping: unknown host google.com' immediately Why am I unable to access the web?

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  • Java chunk negative number problem

    - by user1990950
    I've got a tile based map, which is divided in chunks. I got a method, which puts tiles in this map and with positive numbers it's working. But when using negative numbers it wont work. This is my setTile method: public static void setTile(int x, int y, Tile tile) { int chunkX = x / Chunk.CHUNK_SIZE, chunkY = y / Chunk.CHUNK_SIZE; IntPair intPair = new IntPair(chunkX, chunkY); world.put(intPair, new Chunk(chunkX, chunkY)); world.get(intPair).setTile(x - chunkX * Chunk.CHUNK_SIZE, y - chunkY * Chunk.CHUNK_SIZE, tile); } This is the setTile method in the chunk class (CHUNK_SIZE is a constant with the value 64): public void setTile(int x, int y, Tile t) { if (x >= 0 && x < CHUNK_SIZE && y >= 0 && y < CHUNK_SIZE) tiles[x][y] = t; } What's wrong with my code?

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  • Is it wrong to use a boolean parameter to determine behavior?

    - by Ray
    I have seen a practice from time to time that "feels" wrong, but I can't quite articulate what is wrong about it. Or maybe it's just my prejudice. Here goes: A developer defines a method with a boolean as one of its parameters, and that method calls another, and so on, and eventually that boolean is used, solely to determine whether or not to take a certain action. This might be used, for example, to allow the action only if the user has certain rights, or perhaps if we are (or aren't) in test mode or batch mode or live mode, or perhaps only when the system is in a certain state. Well there is always another way to do it, whether by querying when it is time to take the action (rather than passing the parameter), or by having multiple versions of the method, or multiple implementations of the class, etc. My question isn't so much how to improve this, but rather whether or not it really is wrong (as I suspect), and if it is, what is wrong about it.

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  • How to name multi-setter?

    - by IAdapter
    I'm struggling with how to name this method, I don't like the "set" prefix, because I feel it should be reserved for normal "dumb" setters and some tools might not like it (i did not check it in checkstyle, pmd, etc., but I got a feeling they won't like it.) for example (in java, but I feel its language agnostic) public void setField1Field2(String field1, String field2) { this.field1 = field1; this.field2 = field2; } The only purpose of this method is ONLY to set, this method is needed and cannot be joined with any other (because of framework used).

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  • Problems bringing up a second virtual network interface

    - by tubaguy50035
    I'm having issues adding a second IP address to one interface. Below is my /etc/networking/interfaces # The loopback network interface auto lo iface lo inet loopback #eth0 is our main IP address auto eth0 iface eth0 inet static address 198.58.103.* netmask 255.255.255.0 gateway 198.58.103.1 #eth0:0 is our private address auto eth0:0 iface eth0:0 inet static address 192.168.129.134 netmask 255.255.128.0 #eth0:1 is for www.site.com auto eth0:1 iface eth0:1 inet static address 198.58.104.* netmask 255.255.255.0 gateway 198.58.104.1 When I run /etc/init.d/networking restart, I get a fail error about bringing up eth0:1: RTNETLINK answers: File exists Failed to bring up eth0:1. Any reason this would be? I didn't have any problems with I first set up eth0 and eth0:0.

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