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  • Should I consider Erlang for web mvc?

    - by gotts
    Can I do that? I'm afraid that this can be an overkill and eventually I'll end up with much less productivity than with traditional stack like Ruby/Python/you name it. I understand that you will start with much lower productivity if you start to work with new technology but .. is it potentially worth trying and finally switch to Erlang as the only tool for web development and all the backend stuff. Or is Erlang more suitable for only some high performance backend tasks?

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  • SQLiteOpenHelper getWritableDatabse() fails with no Exception

    - by Michal K
    I have a very strange problem. It only shows from time to time, on several devices. Can't seem to reproduce it when I want, but had it so many times, that I think I know where I get it. So I have a Loader which connects to sqlite through a singleton SQLiteOpenHelper: try{ Log.i(TAG, "Get details offline / db helper: "+DatabaseHelper.getInstance(getContext())); SQLiteDatabase db=DatabaseHelper.getInstance(this.getContext()).getWritableDatabase(); Log.i(TAG, "Get details offline / db: "+db); //doing some work on the db //... } catch(SQLiteException e){ e.printStackTrace(); return null; } catch(Exception e){ e.printStackTrace(); return null; //trying everything to grab some exception or whatever } My SQLIteOpenHelper looks something like this: public class DatabaseHelper extends SQLiteOpenHelper { private static DatabaseHelper mInstance = null; private static Context mCxt; public static DatabaseHelper getInstance(Context cxt) { //using app context ass suggested by CommonsWare Log.i("DBHELPER1", "cxt"+mCxt+" / instance: "+mInstance); if (mInstance == null) { mInstance = new DatabaseHelper(cxt.getApplicationContext()); } Log.i("DBHELPER2", "cxt"+mCxt+" / instance: "+mInstance); mCxt = cxt; return mInstance; } //private constructor private DatabaseHelper(Context context) { super(context, DATABASE_NAME, null, DATABASE_VERSION); this.mCxt = context; } @Override public void onCreate(SQLiteDatabase db) { //some tables created here } @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { //upgrade code here } It really works great in most cases. But from time to time I get a log similar to this: 06-10 23:49:59.621: I/DBHELPER1(26499): cxtcom.bananout.Bananout@407152c8 / instance: com.bananout.helpers.DatabaseHelper@40827560 06-10 23:49:59.631: I/DBHELPER2(26499): cxtcom.bananout.Bananout@407152c8 / instance: com.bananout.helpers.DatabaseHelper@40827560 06-10 23:49:59.631: I/DetailsLoader(26499): Get event details offline / db helper: com.bananout.helpers.DatabaseHelper@40827560 06-10 23:49:59.631: I/DBHELPER1(26499): cxtcom.bananout.Bananout@407152c8 / instance: com.bananout.helpers.DatabaseHelper@40827560 06-10 23:49:59.651: I/DBHELPER2(26499): cxtcom.bananout.Bananout@407152c8 / instance: com.bananout.helpers.DatabaseHelper@40827560 This line Log.i(TAG, "Get details offline / db: "+db); never gets called! No Exceptions, silence. Plus, the thread with the Loader is not running anymore. So nothing past this line SQLiteDatabase db=DatabaseHelper.getInstance(this.getContext()).getWritableDatabase(); gets executed. What can possibly go wrong on this line?

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  • jquery and confirmation link button problem

    - by senzacionale
    http://javiercrespoalvez.com/2008/12/aspnet-confirmation-button-using-jquery.html I am using this aspx control but i have problem in updatepanel on aspx confirmation link button. First time i click on link button then i click "yes" and code is executed. Next time i click on any link button code is alwas executed before i click "yes" or "no". I think problem is in jquery nad updatepane...

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  • EXC_MEMORY_ACCESS when trying to delete from Core Data ($cash solution)

    - by llloydxmas
    I have an application that downloads an xml file, parses the file, and creates core data objects while doing so. In the parse code I have a function called 'emptydatacontext' that removes all items from Core Data before creating replacements items from the xml data. This method looks like this: -(void) emptyDataContext { NSFetchRequest * allCon = [[NSFetchRequest alloc] init]; [allCon setEntity:[NSEntityDescription entityForName:@"Condition" inManagedObjectContext:managedObjectContext]]; NSError * error = nil; NSArray * conditions = [managedObjectContext executeFetchRequest:allCon error:&error]; DebugLog(@"ERROR: %@",error); DebugLog(@"RETRIEVED: %@", conditions); [allCon release]; for (NSManagedObject * condition in conditions) { [managedObjectContext deleteObject:condition]; } // Update the data model effectivly removing the objects we removed above. //NSError *error; if (![managedObjectContext save:&error]) { DebugLog(@"%@", [error domain]); } } The first time this runs it deletes all objects and functions as it should - creating new objects from the xml file. I created a 'update' button that starts the exact same process of retrieving the file the proceeding with the parse & build. All is well until its time to delete the core data objects. This 'deleteObject' call creates a "EXC_BAD_ACCESS" error each time. This only happens on the second time through. Captured errors return null. If I log the 'conditions' array I get a list of NSManagedObjects on the first run. On the second this log request causes a crash exactly as the deleteObject call does. I have a feeling it is something very simple I'm missing or not doing correctly to cause this behavior. The data works great on my tableviews - its only when trying to update I get the crashes. I have spent days & days on this trying numerous alternative methods. Whats left of my hair is falling out. I'd be willing to ante up some cash for anyone willing to look at my code and see what I'm doing wrong. Just need to get past this hurdle. Thanks in advance for the help!

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  • How can a Rails newbie find a job as a Rails developer?

    - by esavard
    I'm a Ruby on Rails newbie. I'm learning Rails in my spare time (my day job is C++ developer) and I like it. I would like to be paid to do Rails development full-time instead of C++. How can I find a job in Rails when most job offering requires 2-5 years of Rails experience? What is the most effective strategy to get some credibility as a Rails Developer? Thanks in advance for your answers.

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  • What is the order of Android call state change when out going or incoming happened?

    - by CKR666
    The following are the changes in phone state in android CALL_STATE_OFFHOOK CALL_STATE_IDLE CALL_STATE_RINGING When i am making an outgoing call ,one received my call and after some time I or He ends the call. When i have a incoming call ,I received the call and after some time I or He ends the call. Where i want to use the broadcast receiver and Listener and why service is using for doing this.

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  • Is there a more modern regexp handler for Open Object Rexx

    - by Brent.Longborough
    The regular expression class (rxregexp.dll) that comes with ooRexx (I'm on 4.0.0) is relatively low on function compared, say, with Python's re module (even at 2.5.2). It appears to have no assertions, no facilities for group extraction, or for substitution. Greedy or lazy matching is a global pattern option, rather than flagged by an additional "?". Basically, a pre-PCRE regular expression engine. Does anyone know if anything with more up-to-date function is available?

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  • How to set configuration properties in VS once and for all?

    - by atch
    In VS 2010RC I have to specify configuration properties and specifically included path every time I'm creating new project. Is there a way to do it just once for all future projects? I'm asking this for a reason that I'm starting to use Boost libraries and I have to specify all those paths every time I'm creating project which is bit tedious.

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  • Turn off IIS 7.5 Attach security warning

    - by Miau
    IIS 7 and Visual Studio 2008, every time you attach to w3wp.exe you get an Attach Security Warning, How do you turn this of? It would be cool to know also, how to keep it attached for linger, as this seems to time out after a while Btw: I Added this as a comment to the answer below, the first thing i did was try the msdn article http://msdn.microsoft.com/en-us/library/ms241736.aspx that doesn't work

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  • Listview dsplaying Issue

    - by raj
    I am using LinearLayout to display ListView Adding Button at the Top. Then adding Listview bellow the button. Problem is that Listview take the entire screen at the time of scroll. At the time of scroll the first cell of the ListView went in the Background of the button. Is there any solution to strict the List below the button?

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  • How to get points that intersect the treadline?

    - by chutsu
    Basically I did the Cavendish experiment, and I have a damped sinusoidal wave plotted on Excel. With Position (mm) against Time (s). My problem is that I have added a tread line through the wave function, and wish to calculate the points of which the wave function intersects the tread line. From this I will then be able to calculate the time period. At the moment I'm just having difficulty getting the intersects.. Thanks

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  • Instantiate a model when the kind of model needed is represented as a string argument

    - by indiehacker
    My input data is a string representing the kind of datastore model I want to make. In python, I am using the eval() function to instantiate the model (below code), but this seems overly complex so I was wondering if there is a simpler way people normally do this? >>>model_kind="TextPixels" >>>key_name_eval="key_name" >>>key_name="key_name" >>>kwargs {'lat': [0, 1, 2, 3], 'stringText': 'boris,ted', 'lon': [0, 1, 2, 8], 'zooms': [0, 10]} >>>obj=eval( model_type + '(key_name='+tester+ ',**kwargs )' ) >>>obj <datamodel.TextPixels object at 0xed8808c>

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  • Common Lisp's equivalent of \r inside the format function?

    - by liszt
    Basically, I'd like to do the following, only using Common Lisp instead of Python: print("Hello world.\r\n") I can do this, but it only outputs the #\newline character and skips #\return: (format t "Hello world.~%") I believe I could accomplish this using an outside argument, like this: (format t "Hello world.~C~%" #\return) But is seems awkward to me. Surely I can somehow embed #\return into the very format string, like I can #\newline? Yeah ehh, I'm nitpicking. Thanks for any help!

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  • Partial PHP code refresh

    - by Tom
    Is it possible to refresh only the part of the page? How? the part: if (checkExpiry($member->expires)==true) { print timeLeft($leftts); } else { print "expired"; } I have table which is showing name, email, time until membership ends and I need to refresh 'time until membership ends' every second.

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  • What Java/Scala or .NET web frameworks support modify source code and instantly run workflow e.i. wi

    - by Alexey
    As far as I can see the key advantage of dynamic languages like Ruby or Python over Java/Scala/C# etc is "hot" applying of your changes to source code to the running application. What are the frameworks for JVM or .NET that support the same workflow - apply changes to configuration and source code on the fly? Can they also watch changes to custom configurations and notify application? Note: Frameworks for dynamic languages on JVM/.NET like Grails or Compojure are out of scope here.

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  • Ping results "echo'd" out to a text file on Windows XP machine has unusual character rather than the outcome

    - by Richard Rice
    Here is the situation. I have a Windows XP machine that I would like to ping another machine and send the output to a text file for review at a later date. This is quite a standard question with several answers on this website and others. The issue I have is that when reviewing the txt file afterwards, the outcome of the ping appears as a strange character. A screenshot of the text file output can be found at the following link. Please note its the first 8 ping outputs that have a strange character. The %%B was me hoping that would output what I wanted! (Cannot upload image to any hosting websites because the company I work for seems to be afraid of them ....) Here is the code I'm using: @echo off For /f "tokens=1-2 delims=/:" %%b in ("%TIME%") do (set mytime=%%a%%b) PING 1.1.1.1 -n 1 -w 1000 >NUL for /f "tokens=*" %%A in ('ping 192.168.5.2 -w 10 -n 1') do (echo %date% %time% %%A >> C:\Temp\Ping_Checks\GarrickSide.txt && GOTO Ping ) :Ping PING 1.1.1.1 -n 1 -w 1000 >NUL for /f "tokens=* skip=2" %%A in ('ping 192.168.5.2 -w 10 -n 1') do (echo %date% %time% %%A >> C:\Temp\Ping_Checks\GarrickSide.txt && GOTO Ping ) This code works fine on a Windows 7 machine, but not on a Windows XP machine. It appears that the echo command isn't outputting the right data, but I don't understand this enough to correct it. Can anyone spot where I'm going wrong?

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  • Should the MAC Tables on a switch Stack be the same between sessions?

    - by Kyle Brandt
    According to Cisco's documentation: "The MAC address tables on all stack members are synchronized. At any given time, each stack member has the same copy of the address tables for each VLAN." However, when logged into the switch I see the following: ny-swstack01#show mac ad | inc Total Total Mac Addresses for this criterion: 222 ny-swstack01#ses 2 ny-swstack01-2#show mac ad | inc Total Total Mac Addresses for this criterion: 229 ny-swstack01-2#exit ny-swstack01#ses 3 ny-swstack01-3#show mac ad | inc Total Total Mac Addresses for this criterion: 229 ny-swstack01-3#exit ny-swstack01#ses 4 ny-swstack01-4#show mac ad | inc Total Total Mac Addresses for this criterion: 235 ny-swstack01-4#exit ny-swstack01#show mac ad | inc Total Total Mac Addresses for this criterion: 222 Going back and forth this isn't just because it is changing over time either, within certain sessions there are entries that I don't seen from the master session. We are currently waiting to hear back on CIsco from this, but has anyone run into this before? I stumbled upon this when looking into Unicast flooding, one of the hosts that is a destination MAC of flooding has a MAC entry that appears in session 3, but nowhere else. Also, I checked an all sessions show the same aging time.

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  • C++: How to count all instantiated objects at runtime?

    - by nina
    I have a large framework consisting of many C++ classes. Is there a way using any tools at runtime, to trace all the C++ objects that are being constructed and currently exist? For example, at a certain time t1, perhaps the application has objects A1, A2 and B3, but at time t2, it has A1, A4, C2 and so on? This is a cross platform framework but I'm familiar with working in Linux, Solaris and (possibly) Mac OS X.

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  • Django model help

    - by dotty
    Does anyone have any clue why this doesn't work as expected. If i use the python shell and do team.game_set or team.games It returns an error AttributeError: 'Team' object has no attribute 'game' If i create a Game object and call game.home_team it returns the correct team object Heres my model class Team(models.Model): name = models.CharField(blank=True, max_length=100) class Game(models.Model): home_team = models.ForeignKey(Team, related_name="home_team")

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  • List files that don't match a string in bash

    - by Javier
    Dear all, I'm a newbie in bash and I would like to pass as parameter to a python function all files in a directory that don't match a given pattern. sth. like: $myscripts/myprog.py $myfiles/!(bonjovi) The above example should retrieve all files that don't match to "bonjovi". Best wishes

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  • Long running php script hangs/terminates on IIS 7.5

    - by Rich
    I'm a bit of nube when it comes to configuring IIS 7.5 and Php so apologies if this is a silly question but I've been wrestling with this for over half the day and need some fresh input. I have a php application running on IIS 7.5 , php 5.4 running as fastcgi. The application works absolutley fine with the exception that long running php scripts seem to hang; no 500 error they simply seem never complete and return the results to the browser. I've written a simple test script below to eliminate the possibility of programming error in the main app : <?php /* test timeout */ /*set_time_limit(110);*/ echo "Testing time out in seconds\n"; for ($i = 0; $i < 175; $i++) { echo $i." -- "; if(sleep(1)!=0) { echo "sleep failed script terminating"; break; } } ?> If I run the script beyond 175 seconds it hangs. Below that it will return the results to the browser. Here are the time out parameters that I've set for php and fastcgi. I've also played around setting these really low in order to get various time out errors and have succeeded which brings me to the conclusion that there's another setting that I'm missing .. perhaps. fastcgi activity timeout=800 Idle Timeout = 900 request Timeout 800 Php max_execution_time=700 Any solutions or pointers in the right direction would be very ... very welcome. Thanks

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