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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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  • I just started learning the syntax of c++. What now? [closed]

    - by user73924
    I more or less know the syntax of C++, but when I start to write a program, I have nothing to write, I am blank. The thing is I knew the syntax of C as well and I didn't know how to write programs in that either. Though I could understand the written answers of almost anything. So, my question here is how do I start writing my own programs or how do I put my thoughts on any program using any programming language?

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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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  • Java Developer Workshop #2 ??!(12/1)

    - by ksky
    12/1??????????????Java?????????????????????????????(?2?:?1????????)??????!?????????????JavaFX/SE/EE/ME???????????????????????"Polyglot Programming on Java VM"??????Scala?JRuby?Groovy????Java VM??????????????????????????????????????????????????????? ???????Client Java Group?Vice President???JavaFX???????????Nandini Ramani???????????????JavaFX 2.0??????????????????????????Nandini?JavaOne???????????????????????????JavaOne??iPad?Windows?Linux?????????JavaFX???????????????????????? ???????????????????????????JavaOne??????????????Java EE/SE/ME???????????????????????????????????SE 8???????????EE????SE?FX???????ME??????????????????? ???Java VM????!???Scala?????????Scala??????????????????????????Scala????????????????????JRuby????????JRuby/CRuby???????????????????JRuby????????????????????????Groovy????????????????GROOVY???????????????Groovy????Java???????????????????? ???????????Java SE 7?JavaFX 2.0?????????????????Java VM?????????????????????????????! ???????????????????????????????????????????????????????????????????!????????????????????ustream?????????????

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  • c# RegEx with "|"

    - by WtFudgE
    I need to be able to check for a pattern with | in them. For example an expression like d*|*t should return true for a string like "dtest|test". I'm no regex hero so I just tried a couple of things, like: Regex Pattern = new Regex("s*\|*d"); //unable to build because of single backslash Regex Pattern = new Regex("s*|*d"); //argument exception error Regex Pattern = new Regex(@"s*\|*d"); //returns true when I use "dtest" as input, so incorrect Regex Pattern = new Regex(@"s*|*d"); //argument exception error Regex Pattern = new Regex("s*\\|*d"); //returns true when I use "dtest" as input, so incorrect Regex Pattern = new Regex("s*" + "\\|" + "*d"); //returns true when I use "dtest" as input, so incorrect Regex Pattern = new Regex(@"s*\\|*d"); //argument exception error I'm a bit out of options, what should I then use? I mean this is pretty basic RegEx i know, but I'm not getting it for some reason.. Thx

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  • Why not standard Android emulators?

    - by Gerry
    I'm new to Android, but have published iphone and bberry apps. I see that I have to create an emulator using the SDK, before I can write and test an app. Why are there no default emulators? Why not at least a Nexus one, or HTC hero emulator shipped with the product? Sure its supposed to be flexible, but why not make it easy to create hello world and play around with a virtual Android phone? Both blackberry and iphone come with default simulators when you download the sdk. Thanks, Gerry

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  • Problem in getting Contact Info

    - by Rahul
    Hi, I m working on application in which i have to send all contacts from Android mobile to other mobile through SMS. I don't have any problem in getting contact information but when I send those Contacts after few messages there is Alert Window pop up saying "A large number of message have being send" and ask if you want to send or not. I am testing this application on HTC Hero. Is this problem is for specific mobiles or for all? I don't know what should i do to avoid this window because I cant get SMS Sent event. Please help me with any ideas that i can implement........ Thanks

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  • regular expression with "|"

    - by WtFudgE
    I need to be able to check for a pattern with | in them. For example an expression like d*|*t should return true for a string like "dtest|test". I'm no regular expression hero so I just tried a couple of things, like: Regex Pattern = new Regex("s*\|*d"); //unable to build because of single backslash Regex Pattern = new Regex("s*|*d"); //argument exception error Regex Pattern = new Regex(@"s*\|*d"); //returns true when I use "dtest" as input, so incorrect Regex Pattern = new Regex(@"s*|*d"); //argument exception error Regex Pattern = new Regex("s*\\|*d"); //returns true when I use "dtest" as input, so incorrect Regex Pattern = new Regex("s*" + "\\|" + "*d"); //returns true when I use "dtest" as input, so incorrect Regex Pattern = new Regex(@"s*\\|*d"); //argument exception error I'm a bit out of options, what should I then use? I mean this is a pretty basic regular expression I know, but I'm not getting it for some reason.

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  • camera preview on androd - strange lines on 1.5 version of sdk

    - by Marko
    Hi all, I am developing the camera module for an android application. In main application when user clicks on 'take picture' button, new view with SurfaceView control is opened and camera preview is shown. When users click on dpad center, camera takes picture and save it to the disc. Pretty simple and straightforward. Everything works fine on my device - HTC Tattoo, minsdkversion 1.6 ...but when I tested application on HTC Hero minsdkversion 1.5, when camera preview is shown,some strange lines occur. Anyone has idea what is going on? p.s. altough preview is crashed, taking of pictures works fine here is the picture: Thanx Marko

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  • Enable GPS and network location programmatically on rooted phone?

    - by Steve H
    I'd like to write a simple widget that toggles GPS and network location on and off. I've read that it's not possible to do that normally, but presumably on a rooted phone it must be doable. Does anyone know what the code would be? (I only need the code to toggle the location providers, I know how to make the widget.) It doesn't matter that this isn't a 'good' solution, I don't plan to distribute the widget. If it matters, this would be on an HTC Hero, still running v1.5.

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  • Android app works on emulator but not on phone ("Can't dispatch DDM chunk XXXX: no handler defined")

    - by JR_vv2
    Hey all, I made a very simple application to start playing around with Android development. It works fine on the emulator, but it gives me the following error when I try to install it on my HTC Hero (v1.5): Sorry! The application Simple Dial (process com.foo.simpledial) has stopped unexpectedly. Please try again. (Force Close button) and on in the Eclipse console, I get the following message: [2010-06-14 23:10:52 - Simple Dial] Uploading Simple Dial.apk onto device 'HT9BSHF00222' [2010-06-14 23:10:53 - Simple Dial] Installing Simple Dial.apk... [2010-06-14 23:10:56 - Simple Dial] Success! [2010-06-14 23:10:56 - Simple Dial] Starting activity com.alanvaghti.simpledial.DialActivity on device [2010-06-14 23:10:57 - Simple Dial] ActivityManager: Can't dispatch DDM chunk 46454154: no handler defined [2010-06-14 23:10:57 - Simple Dial] ActivityManager: Can't dispatch DDM chunk 4d505251: no handler defined [2010-06-14 23:10:57 - Simple Dial] ActivityManager: Starting: Intent { action=android.intent.action.MAIN categories={android.intent.category.LAUNCHER} comp={com.alanvaghti.simpledial/com.alanvaghti.simpledial.DialActivity} } I did put 'android:debuggable="true"' inside the application tag on the manifest.xml Any ideas on what is going on?? Thanks in advance.

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  • Fade effect onclick (jQuery)

    - by Nimbuz
    I have this very basic tabbed block: $('.tabbed-section .panel').hide(); $('.tabbed-section .panel:first').show(); $('.tabbed-section .tabs li:first').addClass('active'); $('.tabbed-section .tabs li a').click(function () { $('.tabbed-section .tabs li').removeClass('active'); $(this).parent().addClass('active'); var currentTab = $(this).attr('href'); var tab_id = $(this).attr('href'); $(this).closest('#hero').attr('class', 'clear ' + tab_id.replace('#', '')); $('.tabbed-section .panel').hide(); $(currentTab).show(); return false; }); .. it works great, but can I add fade effect when the active tab changes? I think there's a plugin (innerfade) for it but I want to avoid using another plugin if possible. Also, can the jQuery above be compacted further? Thanks for your help!

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  • OpenGL extensions available on different Android devices

    - by MH114
    I'm in the process of writing an OpenGL ES powered framework for my next Android game(s). Currently I'm supporting three different techniques of drawing sprites: the basic way: using vertex arrays (slow) using vertex-buffer-objects (VBOs) (faster) using the draw_texture extension (fastest, but only for basic sprites, i.e. no transforming) Vertex arrays are supported in OpenGL ES 1.0 and thus in every Android-device. I'm guessing most (if not all) of the current devices also support VBOs and draw_texture. Instead of guessing, I'd like to know the extensions supported by different devices. If majority of devices support VBOs, I could simplify my code and focus only on VBOs + draw_texture. It'd be helpful to know what different devices support, so if you have an Android-device, do report the extensions list please. :) String extensions = gl.glGetString(GL10.GL_EXTENSIONS); I've got a HTC Hero, so I can share those extensions next.

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  • Getting a variable out of a Public Void (Android)

    - by James Rattray
    I have this code: hubSpinner.setOnItemSelectedListener(new OnItemSelectedListener() { public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) { final MediaPlayer mp2 = MediaPlayer.create(Textbox.this, R.raw.hero); mp2.start(); } public void onNothingSelected(AdapterView<?> parentView) { } }); (The code basically runs when a new item is selected of a spinner and then plays a song, -which later will be a variable based on what was picked, but i'm fine as it is for now) Problem: And I want to be able to use 'mp2' out of this public void, (I want a button which pauses it) How can I do this? Please explain/show... Thanks alot James

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  • Can't correctly stream x264 video to mobile via RTSP

    - by Andrew
    Hello! I'm trying to stream video compressed with x264 and NeroAAC and hinted with MP4Box. When i'm playing it with VLC player streaming works fine, as expected. When i'm trying to open URL with my HTC Hero, it switches to player mode, then starts "loading video" animation, then after some time it shows "unable to connect to server". Sample movies provided with DSS streamed fine regardless bitrate. I tried few encoding options, but always the same result. I suspect nocabac and level=11 but it didn't changed nothing. Is there some more specific encoding options for such type? Thank You!

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  • Problem with onscreen keyboard on Droid

    - by mudit
    Hi all i am developing an application which has a general text entry form. So while testing on my moto droid, i am facing a strange issue-- when i touch an input field ( which is at lower end of the screen) -- the on screen keyboard pops up and hides the input field. So user have to enter blindly. So is this a sdk issue OR it is particular for droids OR am i doing something wrong??? I have tested this same form on G1, Hero..i see no issues at all. Please help...

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  • Bitmap .compress() returning false

    - by Tsimmi
    Hi! The next call to Bitmap.compress(), has a different behavior on the Emulator and on a real device. In the Emulator, result is true, and in a real device the same call returns false. FileOutputStream fos = new FileOutputStream(destinationFile, true); boolean result = myBitmap.compress(Bitmap.CompressFormat.PNG, 100, fos); The thing is that on the emulator this is working great, on a real device ( a HERO) when calling .compress(), this returns false, witch means that it was unable to convert the image properly. Why is this? Thank you

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  • Is it possible to establish default values for inherited fields in subclasses?

    - by Christian Mann
    I'm trying to establish a default value for inherited fields from superclasses. So, my class hierarchy is thus: Character - Enemy - Boss                 \                   - Hero Each Character has a public static char avatar to represent him on an ASCII playing field. How do I set a default value for the avatar of each class inherited from Character? Thank you!

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  • Sending MMS into different Android devices

    - by 6istik
    I need to send MMS. Into my hero this code looks ugly but works: Intent sendIntent = new Intent("android.intent.action.SEND_MSG"); sendIntent.putExtra("address", toText); sendIntent.putExtra(Intent.EXTRA_SUBJECT, "subject"); sendIntent.putExtra("sms_body", textMessage); sendIntent.putExtra(Intent.EXTRA_STREAM, Uri.parse(url)); sendIntent.setType("image/jpeg"); startActivity(sendIntent); But it seems to me that on the other devices it doesn't work at all. I want to send directly to main messaging app without any choices(the better solution of course - direct from my app). Because not sure that all of them would handle it properly. If anybody could recommend any third-party library I'll be appretiate.

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  • How to keep Ubuntu 11.10 and Kate editor w/terminal from changing command line when changing tabs?

    - by Kairan
    I am programming C using Kate editor in Ubuntu 11.10. It works great, but when I change tabs in Kate, the terminal line changes to the file path of the tab I click on. Normally this is not a big deal (other than annoyingly adding extra text to my terminal) however if I am currently RUNNNING a C program, it obviously will type at the command line, which is not so cool. Example terminal window for my C program (its at a menu): 1) select opt 1 2) select opt 2 Enter choice: (here it waits for prompt from user) Now when I click a tab in Kate, it wants to put in the cd / path of the file in that tab, such as: cd /home/user/os/files And of course since my terminal was waiting for prompt from user it gets that command.. not good. Perhaps there is no fix, but maybe someone knows? Obviously I could choose NOT to switch tabs or end program before switching tabs... Note: I probably made the mistake of putting this under StackOverflow which is more of a programming area - so though repost here might be best (I am not sure how to link the questions but will paste hyperlink to that post - I dont want to violate any stackoverflow/superuser violations) Suggestions on merging them are welcome or if I should delete one? StackOverFlow Question

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  • Why does the file date always change to the current date?

    - by Marshall
    We are a programming shop, but this i snot a programming question. My boss has put an external HD on the network. It contains the 'home' folders for users on the network. He uses it to place VB projects that he wants me to work on. But no matter what date and time he places a project on the drive, the file dates(modified) always shows the current date, though nothing in the files have changed. It makes it very hard to confirm that he has given me the latest versions. (He is not a fan of version control and nothing I do will convince him different.) Any ideas why this happens and how to prevent it from happening? P.S. As I wrote this I decided to add the last accessed date to the file display, and those dates happen to show the dates I expect to see. Why is the modified date getting changed, but not the accessed date. Does the accessed date change only when the files are opened or read, changed or not? Note: I use Directory Opus 9, a replacement for windows file browser. Thanks, Marshall

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  • Windows 7 - Windows XP - sharing - why isn't working?

    - by durumdara
    Hi! This is seems to be "hardware" and not "software" / "programming" question, but I need to use this share in my programs, so it is "close to programming". We had an XP based wireless network. The server is XP Professional, the clients are XP Home (Notebooks). This was working well with folder sharing (with user rights, not simple share). Then we replaced the one of the notebook with Win7/X64 notebook. First time this can reach the server, and the another client too. Later I went to another sites, and connect to another servers, another networks. And then, when I return to this network, I saw that I cannot connect to this server. Nothing of resources I see, and when try to dbl click on this computer, I got login window, where I can write anything, never I can login... The interesting part, that: Another XP home can see the server, can login as quest, or with other user. The server can see the XP home notebook. The Win7 can see the notebook's shared folders, and XP home can see the Win7 shared folders. The server can see the Win7 folders, BUT: the Win7 cannot see the server folders. Cannot see the resources too... The Win7 is in "work networking group", the group name is not mshome. I tried everything on the server, I tried to remove MS client, restore it with simple sharing, set guest password, etc., but I lost the possibilities to access this server from Win7. Does anyone have any idea what I need to see, what I need to set to access these resource - to use them in my programs? Thanks for every info, link: dd

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