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  • android activity class does not exists?

    - by user975234
    I have been developing a project in eclipse for an android app. An error which i frequently get is that of- activity class does not exist. But when i just save the manifest file once again the error vanishes and the program runs correctly. Why then do i get the same error again and again. ? Console error: [2011-11-18 15:08:38 - link] Starting activity acb.abc.LinkActivity on device emulator-5554 [2011-11-18 15:08:40 - link] ActivityManager: Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] cmp=acb.abc/.LinkActivity } [2011-11-18 15:08:40 - link] New package not yet registered with the system. Waiting 3 seconds before next attempt. [2011-11-18 15:08:40 - link] ActivityManager: Error: Activity class {acb.abc/acb.abc.LinkActivity} does not exist.

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  • django objects.all() method issue

    - by xlione
    after I saved one item using MyModelClass.save() method of django in one view/page , at another view I use MyModelClass.objects.all() to list all items in MyModelClass but the newly added one always is missing at the new page. i am using django 1.1 i am using mysql middleware setting MIDDLEWARE_CLASSES = ( 'django.middleware.common.CommonMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.middleware.locale.LocaleMiddleware', ) my model: class Company(models.Model): name = models.CharField(max_length=500) description = models.CharField(max_length=500,null=True) addcompany view def addcompany(request): if request.POST: form = AddCompanyForm(request.POST) if form.is_valid(): companyname = form.cleaned_data['companyname'] c = Company(name=companyname,description='description') c.save() return HttpResponseRedirect('/admins/') else: form = AddCompanyForm() return render_to_response('user/addcompany.html',{'form':form},context_instance=RequestContext(request)) after this page in another view i called this form in another view class CompanyForm(forms.Form): companies=((0,' '),) for o in CcicCompany.objects.all(): x=o.id,o.name companies+=(x,) company = forms.ChoiceField(choices=companies,label='Company Name') to list all companies but the recently added one is missing. The transaction should be successful, since after i do a apache server reboot , i can see the newly added company name Thanks for any help...

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  • good __eq__, __lt__, ..., __hash__ methods for image class?

    - by Marten Bauer
    I create the following class: class Image(object): def __init__(self, extension, data, urls=None, user_data=None): self._extension = extension self._data = data self._urls = urls self._user_data = user_data self._hex_digest = hashlib.sha1(self._data).hexDigest() Images should be equal when all values are equal. Therefore I wrote: def __eq__(self, other): if isinstance(other, Image) and self.__dict__ == other.__dict__: return True return False def __ne__(self, other): return not self.__eq__(other) def __lt__(self, other): return self.__dict__ < other.__dict__ ... But how should the __hash__ method look like? Equal Images should return equal hashes... def __hash__(self): # won't work !?! return hash(self.__dict__) Is the way I try to use __eq__, __ne__, __lt__, __hash__, ... recommend?

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  • What to name this class?

    - by orlandu63
    (This is not an interface: I simply omitted the method bodies) class _ { protected $_data = array(); function __construct($data); function set($name, $value); function get($name); function __set($name, $value); function __get($name); //aliases for their respective non-magic methods. # and some other generic methods } Essentially it's a class that provides a magical object-oriented reusable access layer to some data. I've considered DataLayer, DataObject and some others; I'd like to hear some suggestions from someone who's more terminologically savvy.

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  • Automated method to convert .reg registry file to reg.exe commands

    - by nhinkle
    Occasionally I need to put registry entries into batch files to use in login scripts, unattended installers, etc. While it's pretty easy to add one or two registry commands to a batch file using reg.exe, when there is a large amount of registry data, it becomes tedious. I usually just end up merging an external reg file in those cases, which I would like to avoid, since it ruins the self-contained nature of the batch file. Does anybody know of any tools which can automatically convert a .reg file to a series of REG ADD and REG DELETE commands? This would make life a lot easier! Thanks.

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  • c# binarysearch a list<T> by a member of T

    - by Pygmy
    I have a baseclass Event with a DateTime member TimeStamp. Lots of other event-classes will derive from this. I want to be able to search a list of events (that can contain events with duplicate timestamps) fast, so I'd like to use a binary search. So I started out writing something like this : public class EventList<T> : List<T> where T : Event { private IComparer<T> comparer = (x, y) => Comparer<DateTime>.Default.Compare(x.TimeStamp, y.TimeStamp); public IEnumerable<T> EventsBetween(DateTime inFromTime, DateTime inToTime) { // Find the index for the beginning. int index = this.BinarySearch(inFromTime, comparer); // BLAH REST OF IMPLEMENTATION } } The problem is that the BinarySearch only accepts T (so - an Event type) as parameter, while I want to search based on a member of T - the TimeStamp. What would be a good way to approach this ?

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  • Custom iterator for a class based on two sets

    - by Dan Hook
    I have a class that contains two sets. They both contain the same key type but have different compare operations. I would like to provide an iterator for the class that iterates through the elements of both sets. I want to start with one set, then when I increment an iterator pointing to the last element of the first set, I want to go to the first element of the second set. How do I do this? I would like to preserve the bidirectional iterator semantics of std::set, but if it turns out that implementing a forward iterator is much easier, so be it. I'm willing to use the Boost Iterator library if that would help.

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  • Connection string in app.config in a class library

    - by Copeleto
    I am creating solution and inside I have three projects: A WCF Service Library Project A DataAccess Project (Class Library) A Web site for hosting WCF service The implementation of the service is on the project # 1, but in order to access the DataBase I use a second project that implements the data access using a class library project. That problem is in order to get data access I need to configure a connection string, but that connection string must be configurable in a production environment, I meant in production I am going to deploy the site, which is a very simple project that contains only a reference WCF Service Library Project then a guy from database department will configure the connection string. In development I have an app.config on the data access project but when I do the release that app.config is embedded on the dll. Any ideas how can we achieve our purpose

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  • How to remove ActiveX Add on from IE 7 (normal method does not work)

    - by James
    Hi, Does anybody know how to remove an ActiveX control from Internet Explorer 7.0 ? I had been deleting and adding this control numerous times using the built in delete button in Tools, Manage Add-ons, Enable or Disable. This is required for me to test a downloader ActiveX used for a website. It had always shown up in the "Downloaded ActiveX Controls (32 bit) section of the drop down which activates the delete button. However, all of a sudden it now appears under "Add ons that have been used by Internet Explorer" and I cannot delete it from there. The "in folder" column says it's in the C:\WINDOWS\Downloaded Program Files folder... But it does not appear to be there either... Thanks, James

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  • Ugly thing and advantage of anonymos method -C#

    - by nettguy
    I was asked to explain the ugly thing and advantages of anonymous method. I explained possibly Ugly thing anonymous methods turning quickly into spaghetti code. Advantages We can produce thread safe code using anonymous method :Example static List<string> Names = new List<string>( new string[] { "Jon Skeet", "Marc Gravell", "David", "Bill Gates" }); static List<string> FindNamesStartingWith(string startingText) { return Names.FindAll( delegate(string name) { return name.StartsWith(startingText); }); } But really i did not know whether it is thread safe or not.I was asked to justify it. Can any one help me to understand (1) advantages of anonymous methods (2) Is the above code thread safe or not?

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  • What's the difference between the 'DES' class and The 'DESCryptoServiceProvider' class?

    - by IbrarMumtaz
    All I can make out is that one of them is the BC for all 'DES' algorithms to be derived from and the later is a wrapper for the Cryptographic service provider implementation of the DES algorithm. The reason why I ask is that I am going over .Net Security and the MS official training book simply refers to the DES class but the another official MS book refers to the DESCrypto' class. What's the difference between these two? When would you use either of them? What do I need to know as far as the 70-536 exam is concerned. I am asking my question from an educational P.O.V as far as the 70-536 exam is concerned. Thanks In Advance. Ibrar

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  • Custom array class with assotiated objects

    - by FancyDancy
    I have a simple structure, it's just an array of model's objects. For example, it's a users with books. @books = Book.find(:all, :include = :users) I need to check, does user have a book? I have written a helper method: def has_book?(user_id) @books.select{|b| b.user_id == user_id}.any? end Then, i need to get only books from selected library def in_library(n) @books.select{|b| b.library == n} end I have tried to make custom Array class: class BooksList < Array def initialize(books) self << books end # its my custom methods def has_book?(user_id) self.select{|b| b.user_id == user_id}.any? end def in_library(n) self.select{|b| b.library == n} end end It works, but i have only one problem. I can't access Book's assotiated object (user). So i can't write: @books = BookList.new(Book.find(:all, :include => :users)) @books.first.user.id # it says undefined method `user' for #<Array:0x104b43e08>

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  • Issue with class template partial specialization

    - by DeadMG
    I've been trying to implement a function that needs partial template specializations and fallen back to the static struct technique, and I'm having a number of problems. template<typename T> struct PushImpl<const T&> { typedef T* result_type; typedef const T& argument_type; template<int StackSize> static result_type Push(IStack<StackSize>* sptr, argument_type ref) { // Code if the template is T& } }; template<typename T> struct PushImpl<const T*> { typedef T* result_type; typedef const T* argument_type; template<int StackSize> static result_type Push(IStack<StackSize>* sptr, argument_type ptr) { return PushImpl<const T&>::Push(sptr, *ptr); } }; template<typename T> struct PushImpl { typedef T* result_type; typedef const T& argument_type; template<int StackSize> static result_type Push(IStack<StackSize>* sptr, argument_type ref) { // Code if the template is neither T* nor T& } }; template<typename T> typename PushImpl<T>::result_type Push(typename PushImpl<T>::argument_type ref) { return PushImpl<T>::Push(this, ref); } First: The struct is nested inside another class (the one that offers Push as a member func), but it can't access the template parameter (StackSize), even though my other nested classes all could. I've worked around it, but it would be cleaner if they could just access StackSize like a normal class. Second: The compiler complains that it doesn't use or can't deduce T. Really? Thirdly: The compiler complains that it can't specialize a template in the current scope (class scope). I can't see what the problem is. Have I accidentally invoked some bad syntax?

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  • Is there a way to call custom method of Custom Role Provider class

    - by IrfanRaza
    Hello friends, I have created my own custom role provider class "SGI_RoleProvider" and configured properly. Everything is working fine. Suppose that I have added a public method say "SayHello()", then how can i call that. Because if i am using Roles then the method is not displayed. If i am forcefully using that Roles.SayHello() then compiler gives the error. Any suggestion how can i call this. Because creating a new instance of SGI_RoleProvider is meaningless. Thanks for sharing your time.

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  • How does this ruby custom accessor work

    - by ennuikiller
    So the method below in class_eval dynamically creates accessors for attributes defined at runtime. It can be used, for example, to create configuration objects with attributes read from a config file (and unknown until runtime). I understanding all of it except for the else branch. If I am correct the else branch returns the attribute value (val[0]) if there is one value passed in *val. However the way its written I would expect it to return an array (val) if there is more then one value passed in *var. In particular, if I have something like the following: value = 5 then from reading the code I would expect "#{@value}" to be [=,5]. However "#{@value}" returns 5 and not the array [=,5]. How is this possible? class Module def dsl_accessor(*symbols) symbols.each do |sym| class_eval %{ def #{sym}(*val) if val.empty? @#{sym} else @#{sym} = val.size == 1 ? val[0] : val end end } end end end

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  • How invoke live method with arguments

    - by dorelal
    I am learning how to write jQuery plugin. So why I am doing what I am doing does not matter. I writing a plugin called live2 which does nothing else but internally calls live method. (function($) { $.fn.live2 = function() { /* if there are no elements then just return */ if (!this.length) return this; return this.each(function() { var $this = $(this); jQuery.fn.live.apply(this, arguments); }); // end of return this.each(function()) }; // end of plugin })(jQuery); Above code should be invoked just live any live method. Instead of live use live2. $('#container').live2('click',function(){ return false; }) But the plugin is not working. Any idea what the fix should be.

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  • Using LDAP as auth method for git repositories

    - by Lenni
    I want to convince my boss that we should be using git for version control. He says, that it absolutely must authenticate users through our central LDAP server. I looked at the various solutions (gitweb, gitorious ... ) and couln't really find a definitive answer about whether they support LDAP authentication. The only solution I could find a little info on was a Apache+mod_ldap setting. But that would mean that the user authenticating on LDAP wouldn't necessarily be the same as the actual git user, right? (Not that this is a huge problem, but just something which would bug me.) So, what's the best way to authenticate git users via LDAP?

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  • Calling different layers from the same class

    - by khalid
    Hi, I am here to seek some help with my code which i am facing a dead end road with. I'm trying to pass values from screen1.java using Intent to screen2.java. Passing the values is fine and I managed to get through it; however, when I check using if statement the program crash down. Here are my files, plzzzzzzzzzzz help screen1.java package test.android; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.Button; public class screen1 extends Activity { static String strKey = "Hello"; static final String strValue = "Hello"; public void onCreate(Bundle icicle) { super.onCreate(icicle); setContentView(R.layout.screen1); //** button A Button A = (Button) findViewById(R.id.btnClickA); A.setOnClickListener(new View.OnClickListener() { public void onClick(View arg0) { Intent i = new Intent(screen1.this, screen2.class); strKey = "NAME"; i.setClassName("packageName", "packageName.IntentClass"); String term = "Hello"; i.putExtra("packageName.term", term); //i.putExtra(strKey, strValue); startActivity(i); } }); //** //** button B Button B = (Button) findViewById(R.id.btnClickB); B.setOnClickListener(new View.OnClickListener() { public void onClick(View arg0) { Intent i = new Intent(screen1.this, screen3.class); startActivity(i); } }); //** } } screen2.java package test.android; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.widget.Button; public class screen2 extends Activity { public void onCreate(Bundle icicle) { Bundle extras = getIntent().getExtras(); String term = extras.getString("packageName.term"); System.out.println("--- Name is -->"+ term); if(term.equalsIgnoreCase("Hello") || term.equalsIgnoreCase("Name")){ super.onCreate(icicle); setContentView(R.layout.screen3); Button b = (Button) findViewById(R.id.btnClick3); b.setOnClickListener(new View.OnClickListener() { public void onClick(View arg0) { setResult(RESULT_OK); finish(); } }); } else { super.onCreate(icicle); setContentView(R.layout.screen2); Button b = (Button) findViewById(R.id.btnClick2); b.setOnClickListener(new View.OnClickListener() { public void onClick(View arg0) { setResult(RESULT_OK); finish(); } }); } // DOES NOT WORK !!!!!!!!! System.out.println("--- Name is --"+ term); } } Layouts: screen1.xml screen2.xml screen3.xml AndroidManifest.xml <activity android:name="screen1" android:label="SCREEN 1"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name="screen2" android:label="SCREEN 2"> </activity> <activity android:name="screen3" android:label="SCREEN 3"> </activity> ===== The error is caused by these lines of code in screen2.java: if(term.equalsIgnoreCase("Hello") || term.equalsIgnoreCase("Name")){ super.onCreate(icicle); setContentView(R.layout.screen3); Button b = (Button) findViewById(R.id.btnClick3); b.setOnClickListener(new View.OnClickListener() { public void onClick(View arg0) { setResult(RESULT_OK); finish(); } }); } else { super.onCreate(icicle); setContentView(R.layout.screen2); Button b = (Button) findViewById(R.id.btnClick2); b.setOnClickListener(new View.OnClickListener() { public void onClick(View arg0) { setResult(RESULT_OK); finish(); } }); } **notice if I get rid of the entire IF statement and go with only the ELSE the program works fine.

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  • Practical differences between classes and structs in .net (not conceptual)?

    - by Gulshan
    Whenever I tried to search about differences between classes and structs in C# or .net, I ended up with the conceptual overview of the two things like value type or the reference type, where the variables are allocated etc. But I need some practical differences. I have found some like different behavior of assignment operator, having constructors etc. Can anybody provide some more practical differences which will be directly useful while coding? Like the things works with one but not with other or same operation showing different behavior. And some common mistakes regarding these two. Also please suggest where to consider using a struct instead of a class. And where the structs should not be used.

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  • Scala Lift - Robust method to protect files from hotlinking

    - by sirjamm
    I'm attempting to implement a way to stop hotlinking and/or un-authorised access to resources within my app. The method I'm trying to add is something I've used before in PHP apps. Basically a session is set when the page is first called. The images are added to the page via the image tag with the session value as a parameter: <img src="/files/image/[handle]?session=12345" /> When the image is requested the script checks to see if the session is set and matches the provided value. If the condition is not met the serving page returns null. Right at the end to the code I unset the session so further requests from outside the scope of the page will return null. What would be the best implementation of this method within the lift framework? Thanks in advance for any help, much appreciated :)

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  • How to design this class hierarchy?

    - by devoured elysium
    I have defined an Event class: Event and all the following classes inherit from Event: AEvent BEvent CEvent DEvent Now, with the info I gather from all these Event classes, I will make a chart. With AEvent and BEvent, I will generate points for that chart, while with CEvent and DEvent I will paint certain regions of the chart. Now, how should I signal this in my class hierarchy? Should I make AEvent and BEvent inherit from PointEvent while CEvent and DEvent inherit from RegionEvent, being that both RegionEvent and PointEvent inherit from Event? Should I add a field with an Enum to Event with 2 values, Point and Region, and each of the child classes set their value to it? Should I use some kind of pattern here? Which one? Thanks.

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  • Stack trace method names redacted

    - by c.cam108
    I have users email me stack traces when my app crashes on their device. Prior to iOS 6 they looked like this: CRASH: NSInvalidArgumentException (*** -[__NSArrayM insertObject:atIndex:]: object cannot be nil) TRACE: ( 0 CoreFoundation 0x355e58a7 __exceptionPreprocess + 186 1 libobjc.A.dylib 0x3798c259 objc_exception_throw + 32 2 CoreFoundation 0x3553a1d7 -[__NSArrayM insertObject:atIndex:] + 186 3 MYAPP 0x0006c0f7 MYAPP + 188663 4 MYAPP 0x000652a3 MYAPP + 160419 5 Foundation 0x3512ac29 __65-[NSURLConnectionInternal _withConnectionAndDelegate:onlyActive:]_block_invoke_0 + 16 6 Foundation 0x350826d9 -[NSURLConnectionInternalConnection invokeForDelegate:] + 28 7 Foundation 0x350826a3 -[NSURLConnectionInternal _withConnectionAndDelegate:onlyActive:] + 198 8 Foundation 0x350825c5 -[NSURLConnectionInternal _withActiveConnectionAndDelegate:] + 60 9 CFNetwork 0x34de77f5 _ZN19URLConnectionClient23_clientDidFinishLoadingEPNS_26ClientConnectionEventQueueE + 192 10 CFNetwork 0x34ddc4a5 _ZN19URLConnectionClient26ClientConnectionEventQueue33processAllEventsAndConsumePayloadEP20XConnectionEventInfoI12XClientEvent18XClientEventParamsEl + 424 11 CFNetwork 0x34ddc1a3 _ZN19URLConnectionClient13processEventsEv + 106 12 CFNetwork 0x34ddc0d9 _ZN17MultiplexerSource7performEv + 156 13 CoreFoundation 0x355b9ad3 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 14 14 CoreFoundation 0x355b929f __CFRunLoopDoSources0 + 214 15 CoreFoundation 0x355b8045 __CFRunLoopRun + 652 16 CoreFoundation 0x3553b4a5 CFRunLoopRunSpecific + 300 17 CoreFoundation 0x3553b36d CFRunLoopRunInMode + 104 18 GraphicsServices 0x371d7439 GSEventRunModal + 136 19 UIKit 0x33047cd5 UIApplicationMain + 1080 20 MYAPP 0x0003fbcf MYAPP + 7119 21 MYAPP 0x0003fb84 MYAPP + 7044 ) From the CoreFoundation etc method names and asking the user what happened, I can get a pretty good idea of where the crash happened. However, since iOS 6 was released, my crash reports all look like this: CRASH: NSRangeException (*** -[__NSArrayI objectAtIndex:]: index 2147483670 beyond bounds [0 .. 11]) TRACE: ( 0 CoreFoundation 0x3a3872bb <redacted> + 186 1 libobjc.A.dylib 0x32ca697f objc_exception_throw + 30 2 CoreFoundation 0x3a2d1e8d <redacted> + 164 3 MYAPP 0x000ff721 MYAPP + 214817 4 MYAPP 0x000e8999 MYAPP + 121241 5 UIKit 0x372f60ad <redacted> + 72 6 UIKit 0x372f605f <redacted> + 30 7 UIKit 0x372f603d <redacted> + 44 8 UIKit 0x372f58f3 <redacted> + 502 9 UIKit 0x372e1287 <redacted> + 526 10 UIKit 0x37373f3d <redacted> + 748 11 UIKit 0x3721e52b <redacted> + 318 12 UIKit 0x3720b809 <redacted> + 380 13 UIKit 0x3720b123 <redacted> + 6154 14 GraphicsServices 0x362085a3 <redacted> + 590 15 GraphicsServices 0x362081d3 <redacted> + 34 16 CoreFoundation 0x3a35c173 <redacted> + 34 17 CoreFoundation 0x3a35c117 <redacted> + 138 18 CoreFoundation 0x3a35af99 <redacted> + 1384 19 CoreFoundation 0x3a2cdebd CFRunLoopRunSpecific + 356 20 CoreFoundation 0x3a2cdd49 CFRunLoopRunInMode + 104 21 GraphicsServices 0x362072eb GSEventRunModal + 74 22 UIKit 0x3725f301 UIApplicationMain + 1120 23 MYAPP 0x000ccbd3 MYAPP + 7123 24 MYAPP 0x000ccb88 MYAPP + 7048 ) I get the stack trace from here, which the user is prompted to email when the app is re-opened: void uncaughtExceptionHandler(NSException *exception) { //make a file name to write the data to using the documents directory: NSString *fileName = [NSString stringWithFormat:@"%@/crashlog.txt", documentsDirectory]; //create content - four lines of text NSString *content = [NSString stringWithFormat:@"CRASH: %@ (%@)\n\nTRACE: %@", [exception name], [exception reason], [exception callStackSymbols]]; //save content to the documents directory [content writeToFile:fileName atomically:NO encoding:NSStringEncodingConversionAllowLossy error:nil]; } Without the method names, this is worse than useless. Is there any way of getting these method names back into my stack traces? This is a release configuration, not debug.

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  • Better Method of Opening TTY Permissions

    - by VxJasonxV
    At work, I have a few legacy servers that I log into as root, and then su down to a user. I continue to run into an issue where after doing so, I am unable to run screen as this user. I don't want to open screen as root, because then I have to consciously su down the user every new shell, and I often forget. The question is, is there an easier resolution to this than I'm currently aware of? My current solution is to find my terminal pts number, then set it chmod 666. I'm looking for something akin to X11's xhost ACL management, if such a thing exists for this situation.

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