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• Behaviour Trees with irregular updates

  - by Robominister

  I'm interested in behaviour trees that aren't iterated every game tick, but every so often. (Edit: the tree could specify how many frames within the main game loop to wait before running its tick function again). Every theoretical implementation I have seen of behaviour trees talks of the tree search being carried out every game update - which seems necessary, because a leaf node (eg a behaviour, like 'return to base') needs to be constantly checked to see if is still running, failed or completed. Can anyone suggest how I might start implementing a tree that isnt run every tick, or point me in the direction of good material specific to this case (I am struggling to find anything)? My thoughts so far: action leaf nodes (when they start) must only push some kind of action object onto a list for an entity, rather than directly calling any code that makes the entity do something. The list of actions for the entity would be run every frame (update any that need to run, pop any that have completed from the list). the return state from a given action must be fed back into the tree, so that when we run the tree iteration again (and reach the same action leaf node - so the tree has so far determined that we ought to still be trying this action) - that the action has completed, or is still running etc. If my actual action code is running from an action list on an entity, then I possibly need to cancel previously running actions in the list - i am thinking that I can just delete the entire stack of queued up actions. I've seen the idea of ActionLists which block lower priority actions when a higher priority one is added, but this seems like very close logic to behaviour trees, and I dont want to be duplicating behaviour. This leaves me with some questions 1) How would I feed the action return state back into the tree? Its obvious I need to store some information relating to 'currently executing actions' on the entity, and check that in the tree tick, but I can't imagine how. 2) Does having a seperate behaviour tree (for deciding behaviour) and action list (for carrying out actual queued up actions) sound like a reasonable approach? 3) Is the approach of updating a behaviour tree irregularly actually used by anyone? It seems like a nice idea for budgeting ai search time when you have a lot of ai entities to process. (Edit) - I am also thinking about storing a single instance of a given behaviour tree in memory, and providing it by reference to any entity that uses it. So any information about what action was last selected for execution on an entity must be stored in a data context relative to the entity (which the tree can check). (I am probably answering my own questions as i go!) I hope I have expressed my questions adequately! Thanks in advance for any help :)

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• Why would I learn C++11, having known C and C++?

  - by Shahbaz

  I am a programmer in C and C++, although I don't stick to either language and write a mixture of the two. Sometimes having code in classes, possibly with operator overloading, or templates and the oh so great STL is obviously a better way. Sometimes use of a simple C function pointer is much much more readable and clear. So I find beauty and practicality in both languages. I don't want to get into the discussion of "If you mix them and compile with a C++ compiler, it's not a mix anymore, it's all C++" I think we all understand what I mean by mixing them. Also, I don't want to talk about C vs C++, this question is all about C++11. C++11 introduces what I think are significant changes to how C++ works, but it has introduced many special cases that change how different features behave in different circumstances, placing restrictions on multiple inheritance, adding lambda functions, etc. I know that at some point in the future, when you say C++ everyone would assume C++11. Much like when you say C nowadays, you most probably mean C99. That makes me consider learning C++11. After all, if I want to continue writing code in C++, I may at some point need to start using those features simply because my colleagues have. Take C for example. After so many years, there are still many people learning and writing code in C. Why? Because the language is good. What good means is that, it follows many of the rules to create a good programming language. So besides being powerful (which easy or hard, almost all programming languages are), C is regular and has few exceptions, if any. C++11 however, I don't think so. I'm not sure that the changes introduced in C++11 are making the language better. So the question is: Why would I learn C++11? Update: My original question in short was: "I like C++, but the new C++11 doesn't look good because of this and this and this. However, deep down something tells me I need to learn it. So, I asked this question here so that someone would help convince me to learn it." However, the zealous people here can't tolerate pointing out a flaw in their language and were not at all constructive in this manner. After the moderator edited the question, it became more like a "So, how about this new C++11?" which was not at all my question. Therefore, in a day or too I am going to delete this question if no one comes up with an actual convincing argument. P.S. If you are interested in knowing what flaws I was talking about, you can edit my question and see the previous edits.

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• How to Add a Taskbar to the Desktop in Ubuntu 14.04

  - by Lori Kaufman

  If you’ve switched to Ubuntu from Windows, it may take some time to get used to the new and different interface. However, you can easily incorporate a familiar Windows feature, the Taskbar, into Ubuntu to make the transition easier. A tool called Tint2 provides a bar at the bottom of the Ubuntu Desktop that resembles the Windows Taskbar. We will show you how to install it and make it start every time you log into Ubuntu. NOTE: When we say to type something in this article and there are quotes around the text, DO NOT type the quotes, unless we specify otherwise. Press Ctrl + Alt + T to open a Terminal window. To install Tint2, type the following line at the prompt and press Enter. sudo apt-get install tint2 Type your password at the prompt and press Enter. The progress of the installation displays and then a message displays saying how much disk space will be used. When asked if you want to continue, type a “y” and press Enter. When the installation has finished, close the Terminal window by typing “exit” at the prompt and pressing Enter. Click the Search button at the top of the Unity bar. Start typing “startup applications” in the Search box. Items that match what you type start displaying below the Search box. When the Startup Applications tool displays, click the icon to open it. On the Startup Applications Preferences window, click Add. On the Add Startup Program dialog box, enter a name for the startup application. This name displays in the list on the Startup Applications Preferences window. Type “tint2” in the Command edit box, enter a description in the Comment edit box, if desired, and click Add. Tint2 is added as a startup program and will start every time you log into Ubuntu. Click Close to close the Startup Applications Preferences window. Log out and log back in to make the Taskbar available on the desktop. You do not need to reboot the computer for this change to take effect. Now, when you minimize a program, an icon for it displays on the Taskbar at the bottom of the screen, just like the Taskbar in Windows. If you decide that you don’t want the Taskbar to display every time you log into Ubuntu, you can uncheck the Tint2 startup program on the Startup Applications Preferences window. You don’t need to delete it from the list.

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• SQL 2014 does data the way developers want

  - by Rob Farley

  A post I’ve been meaning to write for a while, good that it fits with this month’s T-SQL Tuesday, hosted by Joey D’Antoni (@jdanton) Ever since I got into databases, I’ve been a fan. I studied Pure Maths at university (as well as Computer Science), and am very comfortable with Set Theory, which undergirds relational database concepts. But I’ve also spent a long time as a developer, and appreciate that that databases don’t exactly fit within the stuff I learned in my first year of uni, particularly the “Algorithms and Data Structures” subject, in which we studied concepts like linked lists. Writing in languages like C, we used pointers to quickly move around data, without a database in sight. Of course, if we had a power failure all this data was lost, as it was only persisted in RAM. Perhaps it’s why I’m a fan of database internals, of indexes, latches, execution plans, and so on – the developer in me wants to be reassured that we’re getting to the data as efficiently as possible. Back when SQL Server 2005 was approaching, one of the big stories was around CLR. Many were saying that T-SQL stored procedures would be a thing of the past because we now had CLR, and that obviously going to be much faster than using the abstracted T-SQL. Around the same time, we were seeing technologies like Linq-to-SQL produce poor T-SQL equivalents, and developers had had a gutful. They wanted to move away from T-SQL, having lost trust in it. I was never one of those developers, because I’d looked under the covers and knew that despite being abstracted, T-SQL was still a good way of getting to data. It worked for me, appealing to both my Set Theory side and my Developer side. CLR hasn’t exactly become the default option for stored procedures, although there are plenty of situations where it can be useful for getting faster performance. SQL Server 2014 is different though, through Hekaton – its In-Memory OLTP environment. When you create a table using Hekaton (that is, a memory-optimized one), the table you create is the kind of thing you’d’ve made as a developer. It creates code in C leveraging structs and pointers and arrays, which it compiles into fast code. When you insert data into it, it creates a new instance of a struct in memory, and adds it to an array. When the insert is committed, a small write is made to the transaction to make sure it’s durable, but none of the locking and latching behaviour that typifies transactional systems is needed. Indexes are done using hashes and using bw-trees (which avoid locking through the use of pointers) and by handling each updates as a delete-and-insert. This is data the way that developers do it when they’re coding for performance – the way I was taught at university before I learned about databases. Being done in C, it compiles to very quick code, and although these tables don’t support every feature that regular SQL tables do, this is still an excellent direction that has been taken. @rob_farley

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• Does it make the game more fun when the user is forced to progress thru the levels sequentially rather than letting them pick and play?

  - by BeachRunnerJoe

  Hello. For the first time in my game, I'm stuck with a real design dilemma. I guess that's a good thing ;) I'm building a word puzzle game that has five levels, each with 30 puzzles. Currently, the user has to solve one puzzle at a time before moving to the next. However, I'm finding the user occasionally gets stuck on a puzzle, at which point they can no longer play until they solve it. This is obviously bad because many people will just quit playing the game and delete the app since they get frustrated and can't play any other puzzles until the current puzzle is solved. The only elegant solution I can find to helping the player get unstuck is changing the design of the game to allow the users to pick any puzzle to play at any time. This way, if they get stuck, they can come back to it later and at least they have other puzzles to play in the meantime. It's my opinion, however, that this new flow design doesn't make the game as fun as the original flow design where the player has to complete a puzzle before moving to the next. To me, it's like anything else, when you only have one of something, it's more enjoyable, but when you have 30 of something, it's far less enjoyable. In fact, when I present the user with 30 puzzles to choose from that they need to solve before unlocking the next level, it almost seems as tho I'm making them feel like it's work they have to do. I even had a tester voluntarily tell me that being forced to complete a puzzle before moving to the next is more motivating. My questions are... Do you agree/disagree? Do you have any suggestions for how I can help the player get unstuck? Thanks so much in advance for your thoughts! EDIT: I should mention that I've already considered a few other solutions to helping the user get unstuck, but none of them seem like good ideas. They are... Add more hints: Currently, the user gets two hints per puzzle. If I increase the hint count, it only makes the game more easy and still leaves the possibility of the user getting stuck. Add a "Show Solution" button: This seems like a bad idea because it's my opinion this takes the fun out of the game for many people who would probably otherwise solve the puzzle if they didn't have the quick option to see the solution.

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• Generate MERGE statements from a table

  - by Bill Graziano

  We have a requirement to build a test environment where certain tables get reset from production every night.  These are mainly lookup tables.  I played around with all kinds of fancy solutions and finally settled on a series of MERGE statements.  And being lazy I didn’t want to write them myself.  The stored procedure below will generate a MERGE statement for the table you pass it.  If you have identity values it populates those properly.  You need to have primary keys on the table for the joins to be generated properly.  The only thing hard coded is the source database.  You’ll need to update that for your environment.  We actually used a linked server in our situation. CREATE PROC dba_GenerateMergeStatement (@table NVARCHAR(128) )ASset nocount on; declare @return int;PRINT '-- ' + @table + ' -------------------------------------------------------------'--PRINT 'SET NOCOUNT ON;--'-- Set the identity insert on for tables with identitiesselect @return = objectproperty(object_id(@table), 'TableHasIdentity')if @return = 1 PRINT 'SET IDENTITY_INSERT [dbo].[' + @table + '] ON; 'declare @sql varchar(max) = ''declare @list varchar(max) = '';SELECT @list = @list + [name] +', 'from sys.columnswhere object_id = object_id(@table)SELECT @list = @list + [name] +', 'from sys.columnswhere object_id = object_id(@table)SELECT @list = @list + 's.' + [name] +', 'from sys.columnswhere object_id = object_id(@table)-- --------------------------------------------------------------------------------PRINT 'MERGE [dbo].[' + @table + '] AS t'PRINT 'USING (SELECT * FROM [source_database].[dbo].[' + @table + ']) as s'-- Get the join columns ----------------------------------------------------------SET @list = ''select @list = @list + 't.[' + c.COLUMN_NAME + '] = s.[' + c.COLUMN_NAME + '] AND 'from INFORMATION_SCHEMA.TABLE_CONSTRAINTS pk , INFORMATION_SCHEMA.KEY_COLUMN_USAGE cwhere pk.TABLE_NAME = @tableand CONSTRAINT_TYPE = 'PRIMARY KEY'and c.TABLE_NAME = pk.TABLE_NAMEand c.CONSTRAINT_NAME = pk.CONSTRAINT_NAMESELECT @list = LEFT(@list, LEN(@list) -3)PRINT 'ON ( ' + @list + ')'-- WHEN MATCHED ------------------------------------------------------------------PRINT 'WHEN MATCHED THEN UPDATE SET'SELECT @list = '';SELECT @list = @list + ' [' + [name] + '] = s.[' + [name] +'],'from sys.columnswhere object_id = object_id(@table)-- don't update primary keysand [name] NOT IN (SELECT [column_name] from INFORMATION_SCHEMA.TABLE_CONSTRAINTS pk , INFORMATION_SCHEMA.KEY_COLUMN_USAGE c where pk.TABLE_NAME = @table and CONSTRAINT_TYPE = 'PRIMARY KEY' and c.TABLE_NAME = pk.TABLE_NAME and c.CONSTRAINT_NAME = pk.CONSTRAINT_NAME)-- and don't update identity columnsand columnproperty(object_id(@table), [name], 'IsIdentity ') = 0 --print @list PRINT left(@list, len(@list) -3 )-- WHEN NOT MATCHED BY TARGET ------------------------------------------------PRINT ' WHEN NOT MATCHED BY TARGET THEN';-- Get the insert listSET @list = ''SELECT @list = @list + '[' + [name] +'], 'from sys.columnswhere object_id = object_id(@table)SELECT @list = LEFT(@list, LEN(@list) - 1)PRINT ' INSERT(' + @list + ')'-- get the values listSET @list = ''SELECT @list = @list + 's.[' +[name] +'], 'from sys.columnswhere object_id = object_id(@table)SELECT @list = LEFT(@list, LEN(@list) - 1)PRINT ' VALUES(' + @list + ')'-- WHEN NOT MATCHED BY SOURCEprint 'WHEN NOT MATCHED BY SOURCE THEN DELETE; 'PRINT ''PRINT 'PRINT ''' + @table + ': '' + CAST(@@ROWCOUNT AS VARCHAR(100));';PRINT ''-- Set the identity insert OFF for tables with identitiesselect @return = objectproperty(object_id(@table), 'TableHasIdentity')if @return = 1 PRINT 'SET IDENTITY_INSERT [dbo].[' + @table + '] OFF; 'PRINT ''PRINT 'GO'PRINT '';

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• Create a kind of Interface c++ [migrated]

  - by Liuka

  I'm writing a little 2d rendering framework with managers for input and resources like textures and meshes (for 2d geometry models, like quads) and they are all contained in a class "engine" that interacts with them and with a directX class. So each class have some public methods like init or update. They are called by the engine class to render the resources, create them, but a lot of them should not be called by the user: //in pseudo c++ //the textures manager class class TManager { private: vector textures; .... public: init(); update(); renderTexture(); //called by the "engine class" loadtexture(); gettexture(); //called by the user } class Engine { private: Tmanager texManager; public: Init() { //initialize all the managers } Render(){...} Update(){...} Tmanager* GetTManager(){return &texManager;} //to get a pointer to the manager //if i want to create or get textures } In this way the user, calling Engine::GetTmanager will have access to all the public methods of Tmanager, including init update and rendertexture, that must be called only by Engine inside its init, render and update functions. So, is it a good idea to implement a user interface in the following way? //in pseudo c++ //the textures manager class class TManager { private: vector textures; .... public: init(); update(); renderTexture(); //called by the "engine class" friend class Tmanager_UserInterface; operator Tmanager_UserInterface*(){return reinterpret_cast<Tmanager_UserInterface*>(this)} } class Tmanager_UserInterface : private Tmanager { //delete constructor //in this class there will be only methods like: loadtexture(); gettexture(); } class Engine { private: Tmanager texManager; public: Init() Render() Update() Tmanager_UserInterface* GetTManager(){return texManager;} } //in main function //i need to load a texture //i always have access to Engine class engine-GetTmanger()-LoadTexture(...) //i can just access load and get texture; In this way i can implement several interface for each object, keeping visible only the functions i (and the user) will need. There are better ways to do the same?? Or is it just useless(i dont hide the "framework private functions" and the user will learn to dont call them)? Before i have used this method: class manager { public: //engine functions userfunction(); } class engine { private: manager m; public: init(){//call manager init function} manageruserfunciton() { //call manager::userfunction() } } in this way i have no access to the manager class but it's a bad way because if i add a new feature to the manager i need to add a new method in the engine class and it takes a lot of time. sorry for the bad english.

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• Block-level deduplicating filesystem

  - by James Haigh

  I'm looking for a deduplicating copy-on-write filesystem solution for general user data such as /home and backups of it. It should use online/inline/synchronous deduplication at the block-level using secure hashing (for negligible chance of collisions) such as SHA256 or TTH. Duplicate blocks need not even touch the disk. The idea is that I should be able to just copy /home/<user> to an external HDD with the same such filesystem to do a backup. Simple. No messing around with incremental backups where corruption to any of the snapshots will nearly always break all later snapshots, and no need to use a specific tool to delete or 'checkout' a snapshot. Everything should simply be done from the file browser without worry. Can you imagine how easy this would be? I'd never have to think twice about backing-up again! I don't mind a performance hit, reliability is the main concern. Although, with specific implementations of cp, mv and scp, and a file browser plugin, these operations would be very fast, especially when there is a lot of duplication as they would only need to transfer the absent blocks. Accidentally using conventional copy tools that do not integrate with the FS would merely take longer, waste some bandwidth when copying remotely and waste some CPU, as the duplicate data would be re-read, re-transferred and re-hashed (although nothing would be re-written), but would absolutely not corrupt anything. (Some filesharing software may also be able to benefit by integrating with the FS.) So what's the best way of doing this? I've looked at some options: lessfs - Looks unmaintained. Any good? [Opendedup/SDFS][3] - Java? Could I use this on Android?! What does [SDFS][4] stand for? [Btrfs][5] - Some patches floating around on mailing list archives, but no real support. [ZFS][6] - Hopefully they'll one day relicense under a true Free/Opensource GPL-compatible licence. Also, 2 years ago I had a go at an attempt in Python using Fuse at the file-level to be used over the top of a typical solid FS such as EXT4, but I found Fuse for Python underdocumented and didn't manage to implement all of the system calls. My first post here, so I can't post more than 2 links until I get over 10 rep: [3]: http://www.opendedup.org/ [4]: https://en.wikipedia.org/w/index.php?title=SDFS&action=edit&redlink=1 [5]: https://en.wikipedia.org/wiki/Btrfs#Features [6]: https://en.wikipedia.org/wiki/ZFS#Linux

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• Nautilus ignores / misinterprets view size

  - by BlueZero4

  I noticed that a lot of my folders had suddenly switched to higher view sizes than I had specificied. I was assuming that somehow nautilus had suddenly decided to create per-folder entries for said folders with incorrect view sizes. So I found this question: How to reset all per-folder view settings in nautilus? I found the folder specified in the answer (~/.local/share/gvfs-metadata) and found that it was actually important to delete the files INSIDE the folder, because for some reason deleting the folder itself didn't work for some reason. After doing that, I discovered that the odd setting was for the default view settings, not for a handful of files. Nautilus actually handles the per-folder settings like it should, but it ignores the global folder settings. I want Nautilus to, by default, display all non-specified folders as compact view, 50%. My folders are using the compact setting like I want, but they are not down to 50%. At a guess, they are at 100%. Altering the view size of the icon view can set the compact view to 33%, but I'm not sure by what mechanism this functions. I haven't extensively tested the other view sizes because I don't plan on using them much at all. Next I looked up questions like How do I reset nautilus to the default configuration? I'm expecting the problem to be a corrupted config file or something of the sort, so I hunted down directories like ~/.nautilus, ~/.gconf/apps/nautilus, and ~/.gnome2/nautilus. (I don't have a ~/.nautilus directory, so I'm assuming that's only for older versions.) I attempted to remove the contents of each, but I can't seem to force Nautilus back to default configuration settings. Actually viewing Nautilus's preferences in GConf made the settings look like they were what I wanted them to be, which is odd. I'd like to force Nautilus to default settings, basically. Though if something else will fix it, I'll take it too. I'm not interested in doing a full uninstall, reinstall of Nautilus if I don't have to. ==EDIT1== Turns out that Nautilus just writes the settings in GConf for the heck of it. Nautilus only really uses the settings that it stores in DConf. I did gsettings reset-recursively org.gnome.nautilus, which actually did reset Nautilus to default, but it still doesn't like my view size settings.

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• 5 Step Procedure for Android Deployment with NetBeans IDE

  - by Geertjan

  I'm finding that it's so simple to deploy apps to Android that I'm not needing to use the Android emulator at all, haven't been able to figure out how it works anyway (big blinky screen pops up that I don't know what to do with). I just simply deploy the app straight to Android, try it out there, and then uninstall it, if needed. The whole process (only step 4 and 5 below need to be done for each deployment iteration, after you've done steps 1, 2, and 3 once to set up the deployment environment), takes a few seconds. Here's what I do: On Android, go to Settings | Applications. Check "Unknown sources". In "Development", check "USB debugging". Connect Android to your computer via a USB cable. Start up NetBeans IDE, with NBAndroid installed, as described yesterday. and create your "Hello World" app. Right-click the project in the IDE and choose "Export Signed Android Package". Create a new keystore, or choose an existing one, via the wizard that appears. At the end of the wizard (would be nice if NBAndroid would let you set up a keystore once and then reuse it for all your projects, without needing to work through the whole wizard step by step each time), you'll have a new release APK file (Android deployment archive) in the project's 'bin' folder, which you can see in the Files window. Go to the command line (would be nice if NBAndroid were to support adb, would mean I wouldn't need the command line at all), browse to the location of the APK file above. Type "adb install helloworld-release.apk" or whatever the APK file is called. You should see a "Success" message in the command line. Now the application is installed. On your Android, go to "Applications", and there you'll see your brand new app. Then try it out there and delete it if you're not happy with it. After you've made a change in your app, simply repeat step 4 and 5, i.e., create a new APK and install it via adb. Step 4 and 5 take a couple of seconds. And, given that it's all so simple, I don't see the value of the Android emulator, at all.

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• Dual booting windows 8/ubuntu 12.04.2, Grub doesn't appear and machine never boot in ubuntu

  - by black sensei

  i got a new ACER predator AG3620-UR308 which came with windows 8, so i wanted to run ubuntu 12.04.2 on it as a dual booting. To be honest, i've been doing dual booting for a while now so, i did the right thing. the box came with 2TB HDD. so i made 4 partitions with a raw partition just after the windows installation partition I always do manual installation so even if ubuntu didn't detect windows 8, it was ok for me. So i created swap area and finished the installation etc....Grub was install on the only drive there which is sda. After reboot, grub doesn't even come up.So it always boot in windows 8. I did repeat the installation process twice and yield same result. which is weird because this method always works for me so far.Even the laptop am using to write this post is a dual booting windows 7/ mint nadia installed the same way. Is there anything new in windows 8 that i didn't make provision for? Before starting the installation, all i read about was that , windows 8 should be installed first and ubuntu after. I went ahead and disable secure boot from the BIOS and enabled CSM (don't even know what it means) according to Acer custhelp site . I boot from USB and did fdisk -l bellow is the result: ubuntu@ubuntu:~$ sudo fdisk -l WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted. Disk /dev/sda: 2000.4 GB, 2000398934016 bytes 255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x8c361cb5 Device Boot Start End Blocks Id System /dev/sda1 1 3907029167 1953514583+ ee GPT Partition 1 does not start on physical sector boundary. Disk /dev/sdb: 8178 MB, 8178892800 bytes 255 heads, 63 sectors/track, 994 cylinders, total 15974400 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0006a87e Device Boot Start End Blocks Id System /dev/sdb1 * 2048 15972351 7985152 b W95 FAT32 ubuntu@ubuntu:~$ Can anybody shed some light? thank you in advance EDIT Hey, i just did another trial with 13.04 this time and still no luck. bios: secure-boot: disabled enable CSM : always 1-delete previous ubuntu partition and swap area partition.now having free space 2- used usb installer to prepare usb with ubuntu-13.04-desktop-amd64.iso 3- rebooted : liveusb didnt detect windows 8, used something else 4-created partition ext4 for / 5-created partition for swap-area 6- default grub path is /dev/sda and clicked install Acer always boots into windows.

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• How to Update Remote Diagnostic Agent (RDA) to Latest Version?

  - by Daniel Mortimer

  Remote Diagnostic Agent (RDA) 4.28 was released on 12th June. Full details can be found in this My Oracle Support documentRDA 4 Release Notes [ID 414970.1]From a Fusion Middleware Core Component, Install and Administration perspective this latest release does not offer any significant new features or changes. However, despite the lack of Fusion Middleware specific new features in version 4.28, Remote Diagnostic Agent still comes as highly recommended. It is incredibly useful problem solving / troubleshooting aid. Support engineers dealing with Service Requests often request RDA output as it collects just about everything you might need to get a view of the state and configuration of the host operating system, network setup and Fusion Middleware components. To find out more take a look at Running RDA Against Oracle Fusion Middleware 11g [ID 853437.1] Getting Started With Remote Diagnostic Agent: Case Study - Oracle WebLogic Server (Video) [ID 1262157.1] Note: While the latter document looks at RDA from the perspective of WebLogic Server, much of the advice given in the videos can be applied to other Fusion Middleware products.Ok, let's get back on track with the topic suggested by the title. If you are already familiar with Remote Diagnostic Agent you may ask the question - 'How do I keep my RDA at the latest version?' The answer is in "Running RDA Against Oracle Fusion Middleware 11g [ID 853437.1]". To quote: There are two methods: 1. Upgrade RDA via OCM (Oracle Configuration Manager) Refer to the advice given in: Remote Diagnostic Agent (RDA) Upgrade README [ID 1309034.1] OR 2. Manually download and upgrade to the latest version. To quote from Remote Diagnostic Agent (RDA) 4 - FAQ [ID 330363.1] +++++++++++++++++++++++++++++++++++++++++++++++++++++++ How do I upgrade my RDA 4.x installation from the prior release? The most simplest and reliable way to upgrade your RDA installation is delete or move your old installation to a new location. Then install the new release into the location you had the prior release installed. If you want to reuse you old setup.cfg file, you can place the older version into the new <rda> directory and it will try to upgrade your setup.cfg to the new features. A second approach is to install the latest RDA into another directory, then if needed copy the old setup.cfg file to the new RDA directory. When the new RDA is run for the first time, it will try to upgrade your setup.cfg to the new features. +++++++++++++++++++++++++++++++++++++++++++++++++++++++ The upgrade method via Oracle Configuration Manager is nice because it allows RDA to be auto updated whenever a new release of RDA is made available (which roughly speaking is every 3 months). However, it does require you to install and configure Oracle Configuration Manager in addition to RDA. A quick guide to Fusion Middleware 11g and OCM can be found in this support document.Configuring OCM in Oracle Fusion Middleware 11g? A Quick and Easy Guide [ID 1096871.1]

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• core.* files eating up server space (~50MB)

  - by skytreader

  I'm renting server space from someone and, upon logging in my control panel after quite sometime, noticed an abnormal spike (~50MB) in the disk usage. Upon investigating, I found a lot of core.* files scattered around my public_html directory. Each one is more than 5MB in size but no more than 6MB. The * part is all numbers (in programming regex, that should be core\.\d+). I downloaded one and checked the contents. There was a lot of balderdash characters (NUL mostly, but also a scattering of ETB, ETX, STX) but there's this block of readable text which says: This text is part of the internal format of your mail folder, and is not a real message. It is created automatically by the mail system software. If deleted, important folder data will be lost, and it will be re-created with the data reset to initial values. Pretty self-explanatory. A few blocks above the text are some more readable messages that look like logs but is sandwiched in between non printable characters. I've extracted some below. Scan not valid for mh mailboxes Bogus character 0x%x in news state Can't rewrite news state %.80s Error closing backup news state %.80s No state for newsgroup %.80s found Now, a few concerns: Am I under attack? The messages seem to be about my webmail but I don't use my personal webmail that much---only for a vanity email address and an inbox for an outdated comments system. However, lately, I seem to notice a spike in the spam for my vanity mail. (Note: the comments system is covered by a captcha but every now and then some get through. My vanity email has a spam filter but it isn't as good as I'd like). Next, if this is a feature, can I turn it off? Is it advisable to? I've only 150MB so you see why I'm fretting over a 50MB spike. Some final details: my only server-side scripts are in PHP. The directory which accumulated the most number of these core files is the one containing the Wordpress-managed subdomain of my site. I manage my server through CPanel. Lastly, I decided to delete this files and after some checking nothing seems amiss in my websites nor in my mail. They are indeed the ones responsible for the ~50MB spike as my disk space usage is back to expected.

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• SMTP POP3 & PST. Acronyms from Hades.

  - by mikef

  A busy SysAdmin will occasionally have reason to curse SMTP. It is, certainly, one of the strangest events in the history of IT that such a deeply flawed system, designed originally purely for campus use, should have reached its current dominant position. The explanation was that it was the first open-standard email system, so SMTP/POP3 became the internet standard. We are, in consequence, dogged with a system with security weaknesses so extreme that messages are sent in plain text and you have no real assurance as to who the message came from anyway (SMTP-AUTH hasn't really caught on). Even without the security issues, the use of SMTP in an office environment provides a management nightmare to all commercial users responsible for complying with all regulations that control the conduct of business: such as tracking, retaining, and recording company documents. SMTP mail developed from various Unix-based systems designed for campus use that took the mail analogy so literally that mail messages were actually delivered to the users, using a 'store and forward' mechanism. This meant that, from the start, the end user had to store, manage and delete messages. This is a problem that has passed through all the releases of MS Outlook: It has to be able to manage mail locally in the dreaded PST file. As a stand-alone system, Outlook is flawed by its neglect of any means of automatic backup. Previous Outlook PST files actually blew up without warning when they reached the 2 Gig limit and became corrupted and inaccessible, leading to a thriving industry of 3rd party tools to clear up the mess. Microsoft Exchange is, of course, a server-based system. Emails are less likely to be lost in such a system if it is properly run. However, there is nothing to stop users from using local PSTs as well. There is the additional temptation to load emails into mobile devices, or USB keys for off-line working. The result is that the System Administrator is faced by a complex hybrid system where backups have to be taken from Servers, and PCs scattered around the network, where duplication of emails causes storage issues, and document retention policies become impossible to manage. If one adds to that the complexity of mobile phone email readers and mail synchronization, the problem is daunting. It is hardly surprising that the mood darkens when SysAdmins meet and discuss PST Hell. If you were promoted to the task of tormenting the souls of the damned in Hades, what aspects of the management of Outlook would you find most useful for your task? I'd love to hear from you. Cheers, Michael

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• Does it make the game more fun when the user is forced to progress through the levels sequentially rather than letting them pick and play?

  - by BeachRunnerJoe

  Hello. For the first time in my game, I'm stuck with a real design dilemma. I guess that's a good thing ;) I'm building a word puzzle game that has five levels, each with 30 puzzles. Currently, the user has to solve one puzzle at a time before moving to the next. However, I'm finding the user occasionally gets stuck on a puzzle, at which point they can no longer play until they solve it. This is obviously bad because many people will probably just quit playing the game and delete the app. The only elegant solution I can find to helping the player get unstuck is changing the design of the game to allow the users to pick any puzzle to play at any time. This way, if they get stuck, they can come back to it later and at least they have other puzzles to play in the meantime. It's my opinion, however, that this new flow design doesn't make the game as fun as the original flow design where the player has to complete a puzzle before moving to the next. To me, it's like anything else, when you only have one of something, it's more enjoyable, but when you have 30 of something, it's far less enjoyable. In fact, when I present the user with 30 puzzles to choose from, I'm concerned I might be making them feel like it's a lot of work they have to do and that's bad. I even had a tester voluntarily tell me that being forced to complete a puzzle before moving to the next is actually motivating. My questions are... Do you agree/disagree? Do you have any suggestions for how I can help the player get unstuck? Thanks so much in advance for your thoughts! EDIT: I should mention that I've already considered a few other solutions to helping the user get unstuck, but none of them seem like good ideas. They are... Add more hints: Currently, the user gets two hints per puzzle. If I increase the hint count, it only makes the game more easy and still leaves the possibility of the user getting stuck. Add a "Show Solution" button: This seems like a bad idea because it's my opinion this takes the fun out of the game for many people who would probably otherwise solve the puzzle if they didn't have the quick option to see the solution.

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• Taking a Projects Development to the Next Level

  - by user1745022

  I have been looking for some advice for a while on how to handle a project I am working on, but to no avail. I am pretty much on my fourth iteration of improving an "application" I am working on; the first two times were in Excel, the third Time in Access, and now in Visual Studio. The field is manufacturing. The basic idea is I am taking read-only data from a massive Sybase server, filtering it and creating much smaller tables in Access daily (using delete and append Queries) and then doing a bunch of stuff. More specifically, I use a series of queries to either combine data from multiple tables or group data in specific ways (aggregate functions), and then I place this data into a table (so I can sort and manipulate data using DAO.recordset and run multiple custom algorithms). This process is then repeated multiple times throughout the database until a set of relevant tables are created. Many times I will create a field in a query with a value such as 1.1 so that when I append it to a table I can store information in the field from the algorithms. So as the process continues the number of fields for the tables change. The overall application consists of 4 "back-end" databases linked together on a shared drive, with various output (either front-end access applications or Excel). So my question is is this how many data driven applications that solve problems essentially work? Each backend database is updated with fresh data daily and updating each takes around 10 seconds (for three) and 2 minutes(for 1). Project Objectives. I want/am moving to SQL Server soon. Front End will be a Web Application (I know basic web-development and like the administration flexibility) and visual-studio will be IDE with c#/.NET. Should these algorithms be run "inside the database," or using a series of C# functions on each server request. I know you're not supposed to store data in a database unless it is an actual data point, and in Access I have many columns that just hold calculations from algorithms in vba. The truth is, I have seen multiple professional Access applications, and have never seen one that has the complexity or does even close to what mine does (for better or worse). But I know some professional software applications are 1000 times better then mine. So Please Please Please give me a suggestion of some sort. I have been completely on my own and need some guidance on how to approach this project the right way.

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• Curating projects of deceased friends

  - by Ant

  A very good friend of mine, and an avid programmer, recently passed away. He left nearly 40 projects on BitBucket. Most of them are public, but a few of them are marked as private. I've decided to take on curation duties for the projects rather than leave his work to disappear. If you have been in the same situation, what did you do? Did you open-source everything? Continue development? Delete it all? I'm very interested to hear other people's experiences. There are a few reasons why some of the projects are marked as private (private projects on BitBucket are visible only to invited users and the original creator): One of them is an iOS web app that was free in the app store. I've had to remove the app from the store as I'm shutting down his web sites as a favour to his widow. However, I've already made the app public under the GPL v3 (he was a big GPL supporter). One of them contains proprietary code. It can't be open-sourced. Others are very much work-in-progress. I don't know if he intended to make them into hosted, paid services or if he wanted to give the code away under an open-source licence when they were finished. Here's a list of the private projects: Some kind of living cell simulator that uses SBML along with Runge-Kutta and Euler algorithms to do... something. There's a fair amount of code here but I don't know what it does or how far along it is. No docs. An accountacy application; it seems to have a solid DB design behind it but there's little code on top of that. A website whose purpose is to suggest good restaurants. Built on yii. Seems to have a lot of code but I'd need to set up a WAMP stack to see how far along it is. A website intended to host memorials to people who suffered from the same problem he was. Built on Joomla. I'm not sure how much of the code is just Joomla and how much is custom; again, I'd need to get Joomla running to find out. I'd just introduced him to Mercurial and BitBucket. All of the private projects are single commits of codebases he wasn't using version control with/was previously using SVN. I don't have the SVN repositories so I can't see the commit logs.

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• [EF + Oracle] Inserting Data (1/2)

  - by JTorrecilla

  Prologue Following EF series (I ,II y III) in this chapter we will see how to create DB record from EF. Inserting Data Like we indicated in the 2º post: “One Entity matches with a DB record, and one property match with a Table Column”. To start, we need to create an object from one of the Entities: 1: EMPLEADOS empleado = new EMPLEADOS(); Also like, I told previously, Exists the possibility to use the Static Function defined by VS for each Entity: Once we have created the object, we can Access to it properties to fill like a common class:   1: empleado.NOMBRE = "Javier Torrecilla";   After finish of fill our Entity properties, it must be needed to add the object to the appropriate ObjectSet in the ObjectContext: 1: enti.EMPLEADOS.AddObject(empleado); or 1: enti.AddToEMPLEADOS(empleado); Both methods will do the same action, create an insert statement. Have we finished? No. Any Entity has a property called “EntityState”. This prop is an Enum from “EntityState”, which has the following: Detached: the Entity is created, but not added to the Context. Unchanged: There is no pending changes in the Entity. Added: The entity is added to the ObjectSet, but it is not yet sent to the DB. Deleted: The object is deleted form the ObjectSet, but not yet from the DB. Modified: There is Pending Changes to confirm. Let’s see, the several values of the property during the Creation steps: 1. While the Object is created and we are filling the props: EntityState.Detached; 2. After adding to the ObjectSet: EntityState.Added. This not indicated that the record is in the DB 3. Saving the Data: To sabe the data in the DB, we are going to call “SaveChanges” method of the Object Context. After invoke it, the property will be EntityState.Unchanged.   What does SaveChanges Method? This function will synchronize and send all pending changes to DB. It will add, modify or delete all Entities, whose EntityState property, is setted to Added, Deleted or Modified. After finishing, all added or modified entities will be change the State to “Unchanged”, and deleted Entities must take the “Detached” state.

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• Code testing practice

  - by Robin Castlin

  So now I have come to the conclusion like many others that having some way of constantly testing your code is good practice since it enables fewer people to be involved (colleges and customers alike) by simply knowing what's wrong before someone else finds out the hard way. I've heard and read some about Unit Testing and understand what it's supposed to do and all. The there are so many different types of bugs. It can be everything from web browser not being able not being able to send correct values, javascript failing, a global function messing up a piece of code somewhere to a change that looked good when testing it out but fails in some special case which was hard to anticipate. My simply finding these errors I learn to rarely repeat them again, but there seems to always be new bugs to be found and learnt from. I would guess maybe the best practice would be to run every page and it's functions a couple of times, witness the result and repeat this in Firefox, Chrome and Internet Explorer (and all smartphones apparently) to make sure it works as intended. However this would take quite some time to do consider I don't work with patches/versions and do little fixes here and there a couple of times per week. What I prefer would be some kind of page I can just load that tests as much things as possible to make sure the site works as intended. Basicly just run a lot of cURL's with POST-values and see if I get expected result. But how would I preferably not increase the IDs of every mysql rows if I delete these testing rows? It feels silly to be on ID 1000 with maybe 50 rows in total. If I could build a new project from scratch I would probably implement some kind of smooth way to return a "TRUE" on testing instead of the actual page. But this solution would for the moment being have to be passed on existing projects. My question What would you recommend to be the best way to test my site to make sure that existing functions does their job upon editing the code? Should I consider to implement a lot of edits first, then test manually the entire code to make sure it still works? Is there any nice way of testing codes without "hurting" the ID columns? Extra thoughs Would it be a good idea to associate all of my files to the different parts of my site which they affect? For instance if I edit home.php I will through documentation test if my homepage's start works as intended since it's the only part of my site it should affect.

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• Accessing controls of .aspx file in .aspx.cs without any declaration.!!??

  I am able to access the controls of ".aspx" file in ".aspx.cs" directly without any declaration in ".aspx.cs" or in designer.cs. How is this possible? This is happeing only if I open website as using File System. Create a new ASP.NET web site application with Visual Studio 2008. So following three files will be created automatically              "Default.aspx",              "Default.aspx.cs"              "Default.designer.cs" Now Delete "Default.designer.cs" perminently. Just create a button in Default.aspx file    <asp:Button runat="server" Text="Save Plan" ID="btnSave" />   Close the Solution and open the website as File System.               File -> Open Web Site -> File System -> Select Web Site Folder and Open the project.                   Now btnSave is automatically recognized in Default.aspx.cs without any declaration in Default.aspx.cs as bellow                            System.Web.UI.WebControls.Button btnSave; How btnSave is being recognized by .cs file without defining it anywhere as an object of System.Web.UI.WebControls.Button? Note: This happens only if you open Web Site from File System.           and No Declaration at all for btnSave. Please refer this article on this. span.fullpost {display:none;}

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• Raid superblock missing on single parition. Recovery needed!

  - by user171639

  Ok so I have a 2 TB raid 1 setup that has three partitions: sdc1: linux sdc2: swap sdc3: LVM for data However the LVM will no longer mount. So I thought that I would take the first drive, mount it in linux (ive done this b4), and reset the spare drive to copy the data. Normally I can mount a single drive for data recovery using: sudo su apt-get install mdadm lvm2 mdadm --assemble --scan modprobe dm-mod vgscan vgchange -ay c mount -o ro /dev/c/c /mnt Unfortunately, vgscan doesnot recognize the data partition. It appears as though the superblock on the first drive's data partition was erased while syncing with the second. So now I cannot mount that partition and the second drive is stuck in spare mode. Any ideas? Or a way to force mount the data partition just to copy the data? knoppix@Microknoppix:~$ sudo su root@Microknoppix:/home/knoppix# apt-get install mdadm lvm2 Reading package lists... Done Building dependency tree Reading state information... Done lvm2 is already the newest version. mdadm is already the newest version. 0 upgraded, 0 newly installed, 0 to remove and 551 not upgraded. root@Microknoppix:/home/knoppix# mdadm --assemble --scan mdadm: /dev/md/1 has been started with 1 drive (out of 2). mdadm: /dev/md/0 has been started with 1 drive (out of 2). root@Microknoppix:/home/knoppix# modprobe dm-mod root@Microknoppix:/home/knoppix# vgscan Reading all physical volumes. This may take a while... No volume groups found root@Microknoppix:/home/knoppix# cat /proc/mdstat Personalities : [raid1] md0 : active raid1 sdc1[2] 4193268 blocks super 1.2 [2/1] [U_] md1 : active raid1 sdc2[2] 524276 blocks super 1.2 [2/1] [U_] unused devices: <none> root@Microknoppix:/home/knoppix# mdadm -v --assemble --auto=yes /dev/md2 /dev/sdc3 mdadm: looking for devices for /dev/md2 mdadm: no recogniseable superblock on /dev/sdc3 mdadm: /dev/sdc3 has no superblock - assembly aborted root@Microknoppix:/home/knoppix# dumpe2fs /dev/md0 | grep -i superblock dumpe2fs 1.42.4 (12-Jun-2012) Primary superblock at 0, Group descriptors at 1-1 Backup superblock at 32768, Group descriptors at 32769-32769 Backup superblock at 98304, Group descriptors at 98305-98305 Backup superblock at 163840, Group descriptors at 163841-163841 Backup superblock at 229376, Group descriptors at 229377-229377 Backup superblock at 294912, Group descriptors at 294913-294913 Backup superblock at 819200, Group descriptors at 819201-819201 Backup superblock at 884736, Group descriptors at 884737-884737 root@Microknoppix:/home/knoppix# Notes: I can read the super block from the spare drive. I was gonna try and restore the superblock from one of the backups, but i dont know how or if this would work. I also heard creating a new array (mdadm --create) using the same parameters will not delete the data on the drive but i didnt want to risk it. Recommendations?

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• Accessing controls of .aspx file in .aspx.cs without any declaration.!!??

  I am able to access the controls of ".aspx" file in ".aspx.cs" directly without any declaration in ".aspx.cs" or in designer.cs. How is this possible? This is happeing only if I open website as using File System. Create a new ASP.NET web site application with Visual Studio 2008. So following three files will be created automatically              "Default.aspx",              "Default.aspx.cs"              "Default.designer.cs" Now Delete "Default.designer.cs" perminently. Just create a button in Default.aspx file    <asp:Button runat="server" Text="Save Plan" ID="btnSave" />   Close the Solution and open the website as File System.               File -> Open Web Site -> File System -> Select Web Site Folder and Open the project.                   Now btnSave is automatically recognized in Default.aspx.cs without any declaration in Default.aspx.cs as bellow                            System.Web.UI.WebControls.Button btnSave; How btnSave is being recognized by .cs file without defining it anywhere as an object of System.Web.UI.WebControls.Button? Note: This happens only if you open Web Site from File System.           and No Declaration at all for btnSave. Please refer this article on this. span.fullpost {display:none;}

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• Is it good practice to keep 2 related tables (using auto_increment PK) to have the same Max of auto_increment ID when table1 got modified?

  - by Tum

  This question is about good design practice in programming. Let see this example, we have 2 interrelated tables: Table1 textID - text 1 - love.. 2 - men... ... Table2 rID - textID 1 - 1 2 - 2 ... Note: In Table1: textID is auto_increment primary key In Table2: rID is auto_increment primary key & textID is foreign key The relationship is that 1 rID will have 1 and only 1 textID but 1 textID can have a few rID. So, when table1 got modification then table2 should be updated accordingly. Ok, here is a fictitious example. You build a very complicated system. When you modify 1 record in table1, you need to keep track of the related record in table2. To keep track, you can do like this: Option 1: When you modify a record in table1, you will try to modify a related record in table 2. This could be quite hard in term of programming expecially for a very very complicated system. Option 2: instead of modifying a related record in table2, you decided to delete old record in table 2 & insert new one. This is easier for you to program. For example, suppose you are using option2, then when you modify record 1,2,3,....,100 in table1, the table2 will look like this: Table2 rID - textID 101 - 1 102 - 2 ... 200 - 100 This means the Max of auto_increment IDs in table1 is still the same (100) but the Max of auto_increment IDs in table2 already reached 200. what if the user modify many times? if they do then the table2 may run out of records? we can use BigInt but that make the app run slower? Note: If you spend time to program to modify records in table2 when table1 got modified then it will be very hard & thus it will be error prone. But if you just clear the old record & insert new records into table2 then it is much easy to program & thus your program is simpler & less error prone. So, is it good practice to keep 2 related tables (using auto_increment PK) to have the same Max of auto_increment ID when table1 got modified?

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• Delphi Editbox causing unexplainable errors...

  - by NeoNMD

  On a form I have 8 edit boxes that I do the exact same thing with. They are arranged in 2 sets of 4, one is Upper and the other is Lower. I kept getting errors clearing all the edit boxes so I went through clearing them 1 by 1 and found that 1 of the edit boxes just didnt work and when I tried to run the program and change that exit box it caused the debugger to jump to a point in the code with the database (even though the edit boxes had nothing to do with the database and they arent in a procedure or stack with a database in it) and say the program has access violation there. So I then removed all mention of that edit box and the code worked perfectly again, so I deleted that edit box, copied and pasted another edit box and left all values the same, then went through my code and copied the code from the other sections and simply renamed it for the new Edit box and it STILL causes an error even though it is entirely new. I cannot figure it out so I ask you all, what the hell? The editbox in question is "Edit1" unit DefinitionCoreV2; interface uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, SQLiteTable3, StdCtrls; type TDefinitionFrm = class(TForm) GrpCompetition: TGroupBox; CmbCompSele: TComboBox; BtnCompetitionAdd: TButton; BtnCompetitionUpdate: TButton; BtnCompetitionRevert: TButton; GrpCompetitionDetails: TGroupBox; LblCompetitionIDTitle: TLabel; EdtCompID: TEdit; LblCompetitionDescriptionTitle: TLabel; EdtCompDesc: TEdit; LblCompetitionNotesTitle: TLabel; EdtCompNote: TEdit; LblCompetitionLocationTitle: TLabel; EdtCompLoca: TEdit; BtnCompetitionDelete: TButton; GrpSection: TGroupBox; LblSectionID: TLabel; LblGender: TLabel; LblAge: TLabel; LblLevel: TLabel; LblWeight: TLabel; LblType: TLabel; LblHeight: TLabel; LblCompetitionID: TLabel; BtnSectionAdd: TButton; EdtSectionID: TEdit; CmbGender: TComboBox; BtnSectionUpdate: TButton; BtnSectionRevert: TButton; CmbAgeRange: TComboBox; CmbLevelRange: TComboBox; CmbType: TComboBox; CmbWeightRange: TComboBox; CmbHeightRange: TComboBox; EdtSectCompetitionID: TEdit; BtnSectionDelete: TButton; GrpSectionDetails: TGroupBox; EdtLowerAge: TEdit; EdtLowerWeight: TEdit; EdtLowerHeight: TEdit; EdtUpperAge: TEdit; EdtUpperLevel: TEdit; EdtUpperWeight: TEdit; EdtUpperHeight: TEdit; LblAgeRule: TLabel; LblLevelRule: TLabel; LblWeightRule: TLabel; LblHeightRule: TLabel; LblCompetitionSelect: TLabel; LblSectionSelect: TLabel; CmbSectSele: TComboBox; Edit1: TEdit; procedure FormCreate(Sender: TObject); procedure BtnCompetitionAddClick(Sender: TObject); procedure CmbCompSeleChange(Sender: TObject); procedure BtnCompetitionUpdateClick(Sender: TObject); procedure BtnCompetitionRevertClick(Sender: TObject); procedure BtnCompetitionDeleteClick(Sender: TObject); procedure CmbSectSeleChange(Sender: TObject); procedure BtnSectionAddClick(Sender: TObject); procedure BtnSectionUpdateClick(Sender: TObject); procedure BtnSectionRevertClick(Sender: TObject); procedure BtnSectionDeleteClick(Sender: TObject); procedure CmbAgeRangeChange(Sender: TObject); procedure CmbLevelRangeChange(Sender: TObject); procedure CmbWeightRangeChange(Sender: TObject); procedure CmbHeightRangeChange(Sender: TObject); private procedure UpdateCmbCompSele; procedure AddComp; procedure RevertComp; procedure AddSect; procedure RevertSect; procedure UpdateCmbSectSele; procedure ClearSect; { Private declarations } public { Public declarations } end; var DefinitionFrm: TDefinitionFrm; implementation {$R *.dfm} procedure TDefinitionFrm.UpdateCmbCompSele; var slDBpath: string; sldb : TSQLiteDatabase; sltb : TSQLiteTable; sCompTitle : string; bNext : boolean; begin slDBPath := ExtractFilepath(application.exename)+ 'Competitions.db'; if not FileExists(slDBPath) then begin MessageDlg('Competitions.db does not exist.',mtInformation,[mbOK],0); exit; end; sldb := TSQLiteDatabase.Create(slDBPath); try sltb := slDb.GetTable('SELECT * FROM CompetitionTable'); try CmbCompSele.Items.Clear; Repeat begin sCompTitle:=sltb.FieldAsString(sltb.FieldIndex['CompetitionID'])+':'+sltb.FieldAsString(sltb.FieldIndex['Description']); CmbCompSele.Items.Add(sCompTitle); bNext := sltb.Next; end; Until sltb.EOF; finally sltb.Free; end; finally sldb.Free; end; end; procedure TDefinitionFrm.UpdateCmbSectSele; var slDBpath: string; sldb : TSQLiteDatabase; sltb : TSQLiteTable; sSQL : string; sSectTitle : string; bNext : boolean; bLast : boolean; begin slDBPath := ExtractFilepath(application.exename)+ 'Competitions.db'; if not FileExists(slDBPath) then begin MessageDlg('Competitions.db does not exist.',mtInformation,[mbOK],0); exit; end; sldb := TSQLiteDatabase.Create(slDBPath); try sltb := slDb.GetTable('SELECT * FROM SectionTable WHERE CompetitionID = '+EdtCompID.text); If sltb.RowCount =0 then begin sltb := slDb.GetTable('SELECT * FROM SectionTable'); bLast:= sltb.MoveLast; sSQL := 'INSERT INTO SectionTable(SectionID,CompetitionID,Gender,Type) VALUES ('+IntToStr(sltb.FieldAsInteger(sltb.FieldIndex['SectionID'])+1)+','+EdtCompID.text+',1,1)'; sldb.ExecSQL(sSQL); sltb := slDb.GetTable('SELECT * FROM SectionTable WHERE CompetitionID = '+EdtCompID.text); end; try CmbSectSele.Items.Clear; Repeat begin sSectTitle:=sltb.FieldAsString(sltb.FieldIndex['SectionID'])+':'+sltb.FieldAsString(sltb.FieldIndex['Type'])+':'+sltb.FieldAsString(sltb.FieldIndex['Gender'])+':'+sltb.FieldAsString(sltb.FieldIndex['Age'])+':'+sltb.FieldAsString(sltb.FieldIndex['Level'])+':'+sltb.FieldAsString(sltb.FieldIndex['Weight'])+':'+sltb.FieldAsString(sltb.FieldIndex['Height']); CmbSectSele.Items.Add(sSectTitle); //CmbType.Items.Strings[sltb.FieldAsInteger(sltb.FieldIndex['Type'])] Works but has logic errors bNext := sltb.Next; end; Until sltb.EOF; finally sltb.Free; end; finally sldb.Free; end; end; procedure TDefinitionFrm.AddComp; var slDBpath: string; sSQL : string; sldb : TSQLiteDatabase; sltb : TSQLiteTable; bLast : boolean; begin slDBPath := ExtractFilepath(application.exename)+ 'Competitions.db'; if not FileExists(slDBPath) then begin MessageDlg('Competitions.db does not exist.',mtInformation,[mbOK],0); exit; end; sldb := TSQLiteDatabase.Create(slDBPath); try sltb := slDb.GetTable('SELECT * FROM CompetitionTable'); try bLast:= sltb.MoveLast; sSQL := 'INSERT INTO CompetitionTable(CompetitionID,Description) VALUES ('+IntToStr(sltb.FieldAsInteger(sltb.FieldIndex['CompetitionID'])+1)+',"New Competition")'; sldb.ExecSQL(sSQL); finally sltb.Free; end; finally sldb.Free; end; UpdateCmbCompSele; end; procedure TDefinitionFrm.AddSect; var slDBpath: string; sSQL : string; sldb : TSQLiteDatabase; sltb : TSQLiteTable; bLast : boolean; begin slDBPath := ExtractFilepath(application.exename)+ 'Competitions.db'; if not FileExists(slDBPath) then begin MessageDlg('Competitions.db does not exist.',mtInformation,[mbOK],0); exit; end; sldb := TSQLiteDatabase.Create(slDBPath); try sltb := slDb.GetTable('SELECT * FROM SectionTable'); try bLast:= sltb.MoveLast; sSQL := 'INSERT INTO SectionTable(SectionID,CompetitionID,Gender,Type) VALUES ('+IntToStr(sltb.FieldAsInteger(sltb.FieldIndex['SectionID'])+1)+','+EdtCompID.text+',1,1)'; sldb.ExecSQL(sSQL); finally sltb.Free; end; finally sldb.Free; end; UpdateCmbSectSele; end; procedure TDefinitionFrm.RevertComp; var slDBpath: string; sldb : TSQLiteDatabase; sltb : TSQLiteTable; iID : integer; begin slDBPath := ExtractFilepath(application.exename)+ 'Competitions.db'; if not FileExists(slDBPath) then begin MessageDlg('Competitions.db does not exist.',mtInformation,[mbOK],0); exit; end; sldb := TSQLiteDatabase.Create(slDBPath); try If CmbCompSele.Text <> '' then begin iID := StrToInt(Copy(CmbCompSele.Text,0,Pos(':',CmbCompSele.Text)-1)); sltb := slDb.GetTable('SELECT * FROM CompetitionTable WHERE CompetitionID='+IntToStr(iID))//ItemIndex starts at 0, CompID at 1 end else sltb := slDb.GetTable('SELECT * FROM CompetitionTable WHERE CompetitionID=1'); try EdtCompID.Text:=sltb.FieldAsString(sltb.FieldIndex['CompetitionID']); EdtCompLoca.Text:=sltb.FieldAsString(sltb.FieldIndex['Location']); EdtCompDesc.Text:=sltb.FieldAsString(sltb.FieldIndex['Description']); EdtCompNote.Text:=sltb.FieldAsString(sltb.FieldIndex['Notes']); finally sltb.Free; end; finally sldb.Free; end; end; procedure TDefinitionFrm.RevertSect; var slDBpath: string; sldb : TSQLiteDatabase; sltb : TSQLiteTable; iID : integer; sTemp : string; begin slDBPath := ExtractFilepath(application.exename)+ 'Competitions.db'; if not FileExists(slDBPath) then begin MessageDlg('Competitions.db does not exist.',mtInformation,[mbOK],0); exit; end; sldb := TSQLiteDatabase.Create(slDBPath); try If CmbCompSele.Text <> '' then begin iID := StrToInt(Copy(CmbSectSele.Text,0,Pos(':',CmbSectSele.Text)-1)); sltb := slDb.GetTable('SELECT * FROM SectionTable WHERE SectionID='+IntToStr(iID));//ItemIndex starts at 0, CompID at 1 end else sltb := slDb.GetTable('SELECT * FROM SectionTable WHERE CompetitionID='+EdtCompID.Text); try EdtSectionID.Text:=sltb.FieldAsString(sltb.FieldIndex['SectionID']); EdtSectCompetitionID.Text:=sltb.FieldAsString(sltb.FieldIndex['CompetitionID']); Case sltb.FieldAsInteger(sltb.FieldIndex['Type']) of 1 : CmbType.ItemIndex:=0; 2 : CmbType.ItemIndex:=0; 3 : CmbType.ItemIndex:=1; 4 : CmbType.ItemIndex:=1; end; Case sltb.FieldAsInteger(sltb.FieldIndex['Gender']) of 1 : CmbGender.ItemIndex:=0; 2 : CmbGender.ItemIndex:=1; 3 : CmbGender.ItemIndex:=2; end; sTemp := sltb.FieldAsString(sltb.FieldIndex['Age']); if sTemp <> '' then begin //Decode end else begin LblAgeRule.Hide; EdtLowerAge.Text :=''; EdtLowerAge.Hide; EdtUpperAge.Text :=''; EdtUpperAge.Hide; end; sTemp := sltb.FieldAsString(sltb.FieldIndex['Level']); if sTemp <> '' then begin //Decode end else begin LblLevelRule.Hide; Edit1.Text :=''; Edit1.Hide; EdtUpperLevel.Text :=''; EdtUpperLevel.Hide; end; sTemp := sltb.FieldAsString(sltb.FieldIndex['Weight']); if sTemp <> '' then begin //Decode end else begin LblWeightRule.Hide; EdtLowerWeight.Text :=''; EdtLowerWeight.Hide; EdtUpperWeight.Text :=''; EdtUpperWeight.Hide; end; sTemp := sltb.FieldAsString(sltb.FieldIndex['Height']); if sTemp <> '' then begin //Decode end else begin LblHeightRule.Hide; EdtLowerHeight.Text :=''; EdtLowerHeight.Hide; EdtUpperHeight.Text :=''; EdtUpperHeight.Hide; end; finally sltb.Free; end; finally sldb.Free; end; end; procedure TDefinitionFrm.BtnCompetitionAddClick(Sender: TObject); begin AddComp end; procedure TDefinitionFrm.ClearSect; begin CmbSectSele.Clear; EdtSectionID.Text:=''; EdtSectCompetitionID.Text:=''; CmbType.Clear; CmbGender.Clear; CmbAgeRange.Clear; EdtLowerAge.Text:=''; EdtUpperAge.Text:=''; CmbLevelRange.Clear; Edit1.Text:=''; EdtUpperLevel.Text:=''; CmbWeightRange.Clear; EdtLowerWeight.Text:=''; EdtUpperWeight.Text:=''; CmbHeightRange.Clear; EdtLowerHeight.Text:=''; EdtUpperHeight.Text:=''; end; procedure TDefinitionFrm.CmbCompSeleChange(Sender: TObject); begin If CmbCompSele.ItemIndex <> -1 then begin RevertComp; GrpSection.Enabled:=True; CmbSectSele.Clear; ClearSect; UpdateCmbSectSele; end; end; procedure TDefinitionFrm.BtnCompetitionUpdateClick(Sender: TObject); var slDBpath: string; sSQL : string; sldb : TSQLiteDatabase; begin slDBPath := ExtractFilepath(application.exename)+ 'Competitions.db'; if not FileExists(slDBPath) then begin MessageDlg('Competitions.db does not exist.',mtInformation,[mbOK],0); exit; end; sldb := TSQLiteDatabase.Create(slDBPath); try sSQL:= 'UPDATE CompetitionTable SET Description="'+EdtCompDesc.Text+'",Location="'+EdtCompLoca.Text+'",Notes="'+EdtCompNote.Text+'" WHERE CompetitionID ="'+EdtCompID.Text+'";'; sldb.ExecSQL(sSQL); finally sldb.Free; end; end; procedure TDefinitionFrm.BtnCompetitionRevertClick(Sender: TObject); begin RevertComp; end; procedure TDefinitionFrm.BtnCompetitionDeleteClick(Sender: TObject); var slDBpath: string; sSQL : string; sldb : TSQLiteDatabase; iID : integer; begin If CmbCompSele.Text <> '' then begin If (CmbCompSele.Text[1] ='1') and (CmbCompSele.Text[2] =':') then begin MessageDlg('Deleting the last record is a very bad idea :/',mtInformation,[mbOK],0); end else begin slDBPath := ExtractFilepath(application.exename)+ 'Competitions.db'; if not FileExists(slDBPath) then begin MessageDlg('Competitions.db does not exist.',mtInformation,[mbOK],0); exit; end; sldb := TSQLiteDatabase.Create(slDBPath); try iID := StrToInt(Copy(CmbCompSele.Text,0,Pos(':',CmbCompSele.Text)-1)); sSQL:= 'DELETE FROM SectionTable WHERE CompetitionID='+IntToStr(iID)+';'; sldb.ExecSQL(sSQL); sSQL:= 'DELETE FROM CompetitionTable WHERE CompetitionID='+IntToStr(iID)+';'; sldb.ExecSQL(sSQL); finally sldb.Free; end; CmbCompSele.ItemIndex:=0; UpdateCmbCompSele; RevertComp; CmbCompSele.Text:='Select Competition'; end; end; end; procedure TDefinitionFrm.FormCreate(Sender: TObject); begin UpdateCmbCompSele; end; procedure TDefinitionFrm.CmbSectSeleChange(Sender: TObject); begin RevertSect; end; procedure TDefinitionFrm.BtnSectionAddClick(Sender: TObject); begin AddSect; end; procedure TDefinitionFrm.BtnSectionUpdateClick(Sender: TObject); //change fields values var slDBpath: string; sSQL : string; sldb : TSQLiteDatabase; iTypeCode : integer; iGenderCode : integer; sAgeStr, sLevelStr, sWeightStr, sHeightStr : string; begin slDBPath := ExtractFilepath(application.exename)+ 'Competitions.db'; if not FileExists(slDBPath) then begin MessageDlg('Competitions.db does not exist.',mtInformation,[mbOK],0); exit; end; sldb := TSQLiteDatabase.Create(slDBPath); try If CmbType.Text='Fighting' then iTypeCode := 1 else iTypeCode := 3; If CmbGender.Text='Male' then iGenderCode := 1 else if CmbGender.Text='Female' then iGenderCode := 2 else iGenderCode := 3; Case CmbAgeRange.ItemIndex of 0:sAgeStr := 'o-'+EdtLowerAge.Text; 1:sAgeStr := 'u-'+EdtLowerAge.Text; 2:sAgeStr := EdtLowerAge.Text+'-'+EdtUpperAge.Text; end; Case CmbLevelRange.ItemIndex of 0:sLevelStr := 'o-'+Edit1.Text; 1:sLevelStr := 'u-'+Edit1.Text; 2:sLevelStr := Edit1.Text+'-'+EdtUpperLevel.Text; end; Case CmbWeightRange.ItemIndex of 0:sWeightStr := 'o-'+EdtLowerWeight.Text; 1:sWeightStr := 'u-'+EdtLowerWeight.Text; 2:sWeightStr := EdtLowerWeight.Text+'-'+EdtUpperWeight.Text; end; Case CmbHeightRange.ItemIndex of 0:sHeightStr := 'o-'+EdtLowerHeight.Text; 1:sHeightStr := 'u-'+EdtLowerHeight.Text; 2:sHeightStr := EdtLowerHeight.Text+'-'+EdtUpperHeight.Text; end; sSQL:= 'UPDATE SectionTable SET Type="'+IntToStr(iTypeCode)+'",Gender="'+IntToStr(iGenderCode)+'" WHERE SectionID ="'+EdtSectionID.Text+'";'; sldb.ExecSQL(sSQL); finally sldb.Free; end; end; procedure TDefinitionFrm.BtnSectionRevertClick(Sender: TObject); begin RevertSect; end; procedure TDefinitionFrm.BtnSectionDeleteClick(Sender: TObject); var slDBpath: string; sSQL : string; sldb : TSQLiteDatabase; begin If CmbSectSele.Text[1] ='1' then begin MessageDlg('Deleting the last record is a very bad idea :/',mtInformation,[mbOK],0); end else begin slDBPath := ExtractFilepath(application.exename)+ 'Competitions.db'; if not FileExists(slDBPath) then begin MessageDlg('Competitions.db does not exist.',mtInformation,[mbOK],0); exit; end; sldb := TSQLiteDatabase.Create(slDBPath); try sSQL:= 'DELETE FROM SectionTable WHERE SectionID='+CmbSectSele.Text[1]+';'; sldb.ExecSQL(sSQL); finally sldb.Free; end; CmbSectSele.ItemIndex:=0; UpdateCmbSectSele; RevertSect; CmbSectSele.Text:='Select Competition'; end; end; procedure TDefinitionFrm.CmbAgeRangeChange(Sender: TObject); begin Case CmbAgeRange.ItemIndex of 0: begin EdtLowerAge.Show; LblAgeRule.Caption:='Over and including'; LblAgeRule.Show; EdtUpperAge.Hide; end; 1: begin EdtLowerAge.Show; LblAgeRule.Caption:='Under and including'; LblAgeRule.Show; EdtUpperAge.Hide; end; 2: begin EdtLowerAge.Show; LblAgeRule.Caption:='LblAgeRule'; LblAgeRule.Hide; EdtUpperAge.Show; end; end; end; procedure TDefinitionFrm.CmbLevelRangeChange(Sender: TObject); begin Case CmbLevelRange.ItemIndex of 0: begin Edit1.Show; LblLevelRule.Caption:='Over and including'; LblLevelRule.Show; EdtUpperLevel.Hide; end; 1: begin Edit1.Show; LblLevelRule.Caption:='Under and including'; LblLevelRule.Show; EdtUpperLevel.Hide; end; 2: begin Edit1.Show; LblLevelRule.Caption:='LblLevelRule'; LblLevelRule.Hide; EdtUpperLevel.Show; end; end; end; procedure TDefinitionFrm.CmbWeightRangeChange(Sender: TObject); begin Case CmbWeightRange.ItemIndex of 0: begin EdtLowerWeight.Show; LblWeightRule.Caption:='Over and including'; LblWeightRule.Show; EdtUpperWeight.Hide; end; 1: begin EdtLowerWeight.Show; LblWeightRule.Caption:='Under and including'; LblWeightRule.Show; EdtUpperWeight.Hide; end; 2: begin EdtLowerWeight.Show; LblWeightRule.Caption:='LblWeightRule'; LblWeightRule.Hide; EdtUpperWeight.Show; end; end; end; procedure TDefinitionFrm.CmbHeightRangeChange(Sender: TObject); begin Case CmbHeightRange.ItemIndex of 0: begin EdtLowerHeight.Show; LblHeightRule.Caption:='Over and including'; LblHeightRule.Show; EdtUpperHeight.Hide; end; 1: begin EdtLowerHeight.Show; LblHeightRule.Caption:='Under and including'; LblHeightRule.Show; EdtUpperHeight.Hide; end; 2: begin EdtLowerHeight.Show; LblHeightRule.Caption:='LblHeightRule'; LblHeightRule.Hide; EdtUpperHeight.Show; end; end; end; end.

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• Outlook 2007 Backup to D:\Outlook Fails - Access Denied, Write-Protected or File In Use

  - by nicorellius

  I can successfully save the Outlook PST file to the default location on the C drive (C:\Documents and Settings\user\ ... \Outlook) but when I change the backup save to directory to Outlook on the D drive I get the error: Cannot copy Outlook: Access is denied. Make sure the disk is not full or write protected and that the file is not currently in use. I suppose it is not that crucial that I save this file here, but I have never seen this problem before and I have made this same change in the past. I did some searching in this knowledge exchange as well as elsewhere on changing permissions, etc, but this didn't help. I discovered that the folder on my D drive (called Outlook) is not write-protected and nor is it read-only, as I can save to and modify files in that directory, as well as rename and delete the directory itself. At the time when I installed this version of Outlook, I used a previously saved Personal Folder (a backup PST file) and I thought having this still open in Outlook was causing the trouble. But I closed it and still have the same problem. I know this is probably a silly error on my part but I would like to figure it out. I'm new to superuser, but the answers I see are usually very good, so I thought I would post my first question. Thanks in advance.

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