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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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  • CVE-2011-2728 Denial of Service (DoS) vulnerability in Perl

    - by chandan
    CVE DescriptionCVSSv2 Base ScoreComponentProduct and Resolution CVE-2011-2728 Denial of Service (DoS) vulnerability 4.3 Perl 5.6 Solaris 10 SPARC: 146032-03 X86: 146033-03 Solaris 9 Patches planned but not yet available This notification describes vulnerabilities fixed in third-party components that are included in Oracle's product distributions.Information about vulnerabilities affecting Oracle products can be found on Oracle Critical Patch Updates and Security Alerts page.

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  • How can I add a character and enemies to a game that uses Parallax Scrolling? [on hold]

    - by Homer_Simpson
    I use the following code to create Parallax Scrolling: http://www.david-gouveia.com/portfolio/2d-camera-with-parallax-scrolling-in-xna/ Parallax Scrolling is working but I don't know how to add the player and the enemies. I tried to add a player class to the existing code, but if the player moves, then the camera isn't pointing at the player. The player leaves the camera viewport after a few seconds. I use the following code(as described in the tutorial), but it's not working: // Updates my camera to lock on the character _camera.LookAt(player.Playerposition); What can I do so that the player is always the center of the camera? How should I add the character and the enemies to the game? Should I create a layer for the character and the enemies? For example: new Layer(_camera) { Parallax = new Vector2(0.9f, 1.0f) } At the moment, I don't use a layer for the player and I don't have implemented the enemies because I don't know how to do that. My player class: public class Player { Texture2D Playertex; public Vector2 Playerposition = new Vector2(400, 240); private Game1 game1; public Player(Game1 game) { game1 = game; } public void Load(ContentManager content) { Playertex = content.Load<Texture2D>("8bitmario"); TouchPanel.EnabledGestures = GestureType.HorizontalDrag; } public void Update(GameTime gameTime) { while (TouchPanel.IsGestureAvailable) { GestureSample gs = TouchPanel.ReadGesture(); switch (gs.GestureType) { case GestureType.HorizontalDrag: Playerposition.X += 3f; break; } } } public void Render(SpriteBatch batch) { batch.Draw(Playertex, new Vector2(Playerposition.X - Playertex.Width / 2, Playerposition.Y - Playertex.Height / 2), Color.White); } } In Game1, I update the player and camera class: protected override void Update(GameTime gameTime) { // Updates my character's position player.Update(gameTime); // Updates my camera to lock on the character _camera.LookAt(player.Playerposition); base.Update(gameTime); } protected override void Draw(GameTime gameTime) { GraphicsDevice.Clear(Color.CornflowerBlue); foreach (Layer layer in _layers) layer.Draw(spriteBatch); spriteBatch.Begin(SpriteSortMode.Deferred, null, null, null, null, null, _camera.GetViewMatrix(new Vector2(0.0f, 0.0f))); player.Render(spriteBatch); spriteBatch.End(); base.Draw(gameTime); }

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  • Get to Build Free Websites on the Internet Now

    Do you have something that you want to share? Are you trying to make money online with your own website? Are you finding ways on how you can possibly build your own website for free? With your own personal website, you get to practically put up anything and it is entirely up to you on how you want to monetize your website. Setting up and building your own page is not a complicated task.

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  • How to Build a Website - Without Tears!

    How to build a web site, is a question a have been asked endless times and my response is always the same, 'what do you want the site to do for you?' If you want a site that can be visited by friends and family to admire your latest holiday pictures and videos then your task is simple.

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  • Multiple vulnerabilities in Webmin

    - by RitwikGhoshal
    CVE DescriptionCVSSv2 Base ScoreComponentProduct and Resolution CVE-2012-2981 Improper Input Validation vulnerability 6.0 Webmin Solaris 10 SPARC: 145006-04 X86: 145007-04 CVE-2012-2982 Arbitrary code execution vulnerability 6.5 CVE-2012-2983 Improper Authentication vulnerability 5.0 This notification describes vulnerabilities fixed in third-party components that are included in Oracle's product distributions.Information about vulnerabilities affecting Oracle products can be found on Oracle Critical Patch Updates and Security Alerts page.

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  • Adding a simple .js redirect through RoR? [closed]

    - by user18294
    I've just been tasked with adding a .js redirect from an RoR site to another domain. The files are being pulled from GitHub, which means I obviously need to edit the files there. The problem is I know nothing about RoR and coming from an FTP environment, this simple task is proving quite confusing. Can someone please guide me step-by-step on how I would redirect one site to another using JS in this environment? Thanks for your help!

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  • Best Ways to Get Better Positions in the Search Engines

    Since the inception of Internet business, there has been an ever increasing knowledge base with insight into the best way to use the features of search engines. There is actually a precise and methodical approach to generating those top places, so it wouldn't hurt to employ a company that is proficient with them; however, be careful with your selection.

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  • Analyzing I/O performance in Linux

    <b>cmdln.org:</b> "Monitoring and analyzing performance is an important task for any sysadmin. Disk I/O bottlenecks can bring applications to a crawl. What is an IOP? Should I use SATA, SAS, or FC? How many spindles do I need?"

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  • Colliding Rects [migrated]

    - by user73400
    I have been working on this game, but I have a question when it comes to collision detection. Can I check for collision and have it return True: example: def collide(self, EnemyTank): tank_collision = pygame.sprite.collide_rect(self.rect, EnemyTank.rect) if tank_collision == True: return True And then make it perform an action like this: if player.collide == True: e_tank_x += 0 I am new to programming so please bear with me, I am trying as hard as I can and any comments or suggestions would also be very appreciated.

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  • Subdomain redirects to subdirectory [duplicate]

    - by redraw
    This question already has an answer here: How do I get the root index page to redirect to a subdirectory without affecting SEO? 1 answer Supposing I have folder called "support" inside root folder "/public_html". I've added a subdomain in my server's panel so that when going to "support.mydomain.com" it redirects to "mydomain.com/support" The problem is that redirection is reflected on the browser's address bar, and I want to make that subdomain work like "base domain". i.e "support.mydomain.com/folder-inside-support" Is it something to be with .htaccess file?

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  • A Free CMS - The Uphills of Joomla!

    Joomla! is a free of cost content management system that offers to manage and control the entire content for your website. Though maintaining a website is not an easy task, but it is easy to maintain the websites that are created with the help of Joomla!

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  • Could Your Business Benefit From a Website?

    As a business owner you may have considered using a website to boost your sales and customer base. Many business people know that a website can bring a new dimension to their businesses presence yet they simply do not known where to start.

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  • Is the using of dirname(__FILE__) a good practice?

    - by webose
    looking at the code of Joomla I see that in the first line of the index, it defines the base path of installation with the dirname(FILE) is this a font of possible risk for the site, I mean if a non controlled error message show the internal path of the Joomla directory, because of, for example a failed include, can it be used to perform some kind of attack to the site ? If yes, is it convenient to use this function ? Any idea is welcome. Thanks

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  • CVE-2011-0216 Denial of Service (DoS) vulnerability in libxml2

    - by chandan
    CVE DescriptionCVSSv2 Base ScoreComponentProduct and Resolution CVE-2011-0216 Numeric Errors vulnerability 9.3 libxml2 Solaris 11 Contact Support Solaris 10 SPARC: 125731-07 X86: 125732-07 Solaris 9 Contact Support This notification describes vulnerabilities fixed in third-party components that are included in Sun's product distribution.Information about vulnerabilities affecting Oracle Sun products can be found on Oracle Critical Patch Updates and Security Alerts page.

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  • Google : vers plus de reconnaissance faciale et de réalité augmentée, Motorola vient de racheter la société spécialisée Viewdle

    Google va ajouter plus de reconnaissance faciale et de réalité augmentée à ses produits Motorola rachète la société spécialisée Viewdle Google, via sa filiale Motorola, vient de racheter une société d'origine Ukrainienne baptisée Viewdle. Basé aujourd'hui en Californie, Viewdle est spécialisée « dans la réalité augmentée et la reconnaissance faciale ». [IMG]http://ftp-developpez.com/gordon-fowler/Viewdle%20Google%20Motorola/Viewdle%20Google%20Motorola%201.jpg[/IMG] Sur le même modèle que Face.com acquis par Facebook, son produit phare reconnait et tague automatiquement les visages sur les photos avant de les uploader sur Facebook.

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