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  • Django: Generating a queryset from a GET request

    - by Nimmy Lebby
    I have a Django form setup using GET method. Each value corresponds to attributes of a Django model. What would be the most elegant way to generate the query? Currently this is what I do in the view: def search_items(request): if 'search_name' in request.GET: query_attributes = {} query_attributes['color'] = request.GET.get('color', '') if not query_attributes['color']: del query_attributes['color'] query_attributes['shape'] = request.GET.get('shape', '') if not query_attributes['shape']: del query_attributes['shape'] items = Items.objects.filter(**query_attributes) But I'm pretty sure there's a better way to go about it.

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  • Object declaration in Objective-C

    - by Sahat
    Is there any difference in declaring objects in Objective-C between (1) and (2), besides the style and personal preference? (1) One-line declaration, allocation, initialization. Student *myStudent = [[Student alloc] init]; (2) Multi-line declaration, allocation, initialization. Student *myStudent; myStudent = [Student alloc]; myStudent = [myStudent init];

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  • How to Schedule Method call in Objective C

    - by user359277
    Hi, I am try to do multi-threading in Objective C. What I want to do now is that, for some instance of objects, I want to have to way to call some function 5 seconds later. How can I do that? In Coco 2D, it's very easy to do it. They have something called scheduler. In Objective C, how to do it please? Thanks

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  • What am I missing about WCF?

    - by Bigtoe
    I've been developing in MS technologies for longer than I care to remember at this stage. When .NET arrived on the scene I thought they hit the nail on the head and with each iteration and version I thought their technologies were getting stronger and stronger and looked forward to each release. However, having had to work with WCF for the last year I must say I found the technology very difficult to work with and understand. Initially it's quite appealing but when you start getting into the guts of it, configuration is a nightmare, having to override behaviours for message sizes, number of objects contained in a messages, the complexity of the security model, disposing of proxies when faulted and finally moving back to defining interfaces in code rather than in XML. It just does not work out of the box and I think it should. We found all of the above issues while either testing ourselves or else when our products were out on site. I do understand the rationale behind it all, but surely they could have come up with simpler implementation mechanism. I suppose what I'm asking is, Am I looking at WCF the wrong way? What strengths does it have over the alternatives? Under what circumstances should I choose to use WCF? OK Folks, Sorry about the delay in responding, work does have a nasty habbit of get in the way somethimes :) Some clarifications My main paint point with WCF I suppose falls down into the following areas While it does work out of the box, your left with some major surprises under the hood. As pointed out above basic things are restricted until they are overridden Size of string than can be passed can't be over 8K Number of objects that can be passed in a single message is restricted Proxies not automatically recovering from failures The amount of configuration while it's there is a good thing, but understanding it all and what to use what and under which circumstances can be difficult to understand. Especially when deploying software on site with different security requirements etc. When talking about configuration, we've had to hide lots of ours in a back-end database because security and network people on-site were trying to change things in configuration files without understanding it. Keeping the configuration of the interfaces in code rather than moving to explicitly defined interfaces in XML, which can be published and consumed by almost anything. I know we can export the XML from the assembley, but it's full of rubbish and certain code generators choke on it. I know the world moves on, I've moved on a number of times over the last (ahem 22 years I've been developing) and am actively using WCF, so don't get me wrong, I do understand what it's for and where it's heading. I just think there should be simplier configuration/deployment options available, easier set-up and better management for configuration (SQL config provider maybe, rahter than just the web.config/app.config files). OK, back to the daily grid. Thanks for all your replies so far. Kind Regards Noel

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  • How to display over state of a SimpleButton at up state

    - by Hasan Gürsoy
    I have a menu with button objects in As3. I want to display the page where user is and for this I must show buttons' over state (which is mc) when flash loads. I'm sending the page parameter to flash. I just need to play the movie clip inside the specific button. Looking for something like: btn1.m1.gotoAndPlay(1); or btn1.m1.play();

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  • Re-using Buttons in WPF

    - by Alex Marshall
    I have a bunch of different objects that are commonly edited in the same TabControl using different DataTemplates, but I want each DataTemplate to have a common look and feel with Ok and Cancel buttons at the bottom right of each tab that will close the tab or save the content and then close the currently selected tab. What's the best way to place buttons on each tab ? Is there a way to do it without copying and pasting the buttons and stack panel across all of my data templates ?

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  • Programming Logic upgrading from VB6 to Vb.net

    - by KoolKabin
    Hi guys, I have been programming in vb6 for few time ago and i used open SQL Server connection and command objects to make database traansactions. I have been searching for similar approaches in vb.net too but not finding any starting point. How can we work similarly in vb.net application?

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  • Integers not properly returned from a property list (plist) array in Objective-C

    - by Gaurav
    In summary, I am having a problem where I read what I expect to be an NSNumber from an NSArray contained in a property list and instead of getting a number such as '1', I get what looks to be a memory address (i.e. '61879840'). The numbers are clearly correct in the property list. Below is my process for creating the property list and reading it back. Creating the property list I have created a simple Objective-C property list with arrays of integers within one root array: <array> <array> <integer>1</integer> <integer>2</integer> </array> <array> <integer>1</integer> <integer>2</integer> <integer>5</integer> </array> ... more arrays with integers ... </array> The arrays are NSArray objects and the integers are NSNumber objects. The property list has been created and serialized using the following code: // factorArray is an NSArray that contains NSArrays of NSNumbers as described above // serialize and compress factorArray as a property list, Factors-bin.plist NSString *error; NSString *rootPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0]; NSString *plistPath = [rootPath stringByAppendingPathComponent:@"Factors-bin.plist"]; NSData *plistData = [NSPropertyListSerialization dataFromPropertyList:factorArray format:NSPropertyListBinaryFormat_v1_0 errorDescription:&error]; Inspecting the created plist, all values and types are correct. Reading the property list The property list is read in as Data and then converted to an NSArray: NSString *path = [[NSBundle mainBundle] pathForResource:@"Factors" ofType:@"plist"]; NSData *plistData = [[NSData alloc] initWithContentsOfFile:path]; NSPropertyListFormat format; NSString *error = nil; NSArray *factorData = (NSArray *)[NSPropertyListSerialization propertyListFromData:plistData mutabilityOption:NSPropertyListImmutable format:&format errorDescription:&error]; Cycling through factorData to see what it contains is where I see the erroneous integers: for (int i = 0; i < 10; i++) { NSArray *factorList = (NSArray *)[factorData objectAtIndex:i]; NSLog(@"Factors of %d\n", i + 1); for (int j = 0; j < [factorList count]; j++) { NSLog(@" %d\n", (NSNumber *)[factorList objectAtIndex:j]); } } I see all the correct number of values, but the values themselves are incorrect, i.e.: Factors of 3 61879840 (should be 1) 61961200 (should be 3) Factors of 4 61879840 (should be 1) 61943472 (should be 2) 61943632 (should be 4) Factors of 5 61879840 (should be 1) 61943616 (should be 5)

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  • Parsing SQL in .NET

    - by Eli
    I'm trying to build a .NET Managed data provider and I need to be able to parse SQL commands. What are good, free (as in beer) objects to do this? - I haven't seen any standard .NET assemblies for this yet. Thanks, Eli.

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  • OpenGl glutIdleFunc(void (*func)(void))

    - by PHENOMERICAN
    I'm trying to design very simple animation in OpenGL such as rotating and translating objects. In the red book, I found that using GLUT's glutIdleFunc() is okay for a simple animation. How many times does glutIdleFunc(...) call the function in one second? Thank you.

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  • Zend Form: How to pass parameters into the constructor?

    - by Andrew
    I'm trying to test my form. It will be constructing other objects, so I need a way to mock them. I tried passing them into the constructor... class Form_Event extends Zend_Form { public function __construct($options = null, $regionMapper = null) { $this->_regionMapper = $regionMapper; parent::__construct($options); } ...but I get an exception: Zend_Form_Exception: Only form elements and groups may be overloaded; variable of type "Mock_Model_RegionMapper_b19e528a" provided What am I doing wrong?

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  • How do I concatenate strings in Objective-C?

    - by Typeoneerror
    Are there any shortcuts to (stringByAppendingString:) string concatenation in Objective-C or shortcuts for working with NSString or other objects in general? e.g. I'd like to make this: NSString *myString = @"This"; NSString *test = [myString stringByAppendingString:@" is just a test"]; something more like this: string myString = "This"; string test = myString + " is just a test";

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  • 'object' undeclared <first use in this function>

    - by Mohit Deshpande
    I am using Winchain to develop on my Windows 7 machine. Here is my code: iPhoneTest.h #import <Foundation/Foundation.h> #import <UIKit/UIKit.h> @interface iPhoneTest : UIApplication { UITextView *textview; UIView *mainView; } @end iPhoneTest.m #import "iPhoneTest.h" #import <UIKit/UIKit.h> #import <Foundation/Foundation.h> #import <CoreFoundation/CoreFoundation.h> @implementation iPhoneTest -(void)applicationDidFinishLaunching:(id)unused { UIWindow *window; struct CGRect rect = [UIHardware fullScreenApplicationContentRect]; rect.origin.x = rect.origin.y = 0.0f; window = [[UIWindow alloc] initWithContentRect: rect]; mainView = [[UIView alloc] initWithFrame: rect]; textView = [[UITextView alloc] init]; [textView setEditable:YES]; [textView setTextSize:14]; [window orderFront: self]; [window makeKey: self]; [window _setHidden: NO]; [window setContentView: mainView]; [mainView addSubview:textView]; [textView setText:@"Hello World"]; } @end main.m #import <Foundation/Foundation.h> #import <UIKit/UIKit.h> #import "iPhoneTest.h" int main(int argc, char *argv[]) { NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; int ret = UIApplicationMain(argc, argv, [iPhoneTest class]); [pool release]; return ret; } Makefile INFOPLIST_FILE=Info.plist SOURCES=\ main.m \ iPhoneTest.m CC=/usr/local/bin/arm-apple-darwin-gcc CFLAGS=-g -O2 -Wall LD=$(CC) LDFLAGS=-lobjc -framework CoreFoundation -framework Foundation -framework UIKit -framework LayerKit PRODUCT_NAME=iPhoneTest SRCROOT=/iphone-apps/iPhoneTest WRAPPER_NAME=$(PRODUCT_NAME).app EXECUTABLE_NAME=$(PRODUCT_NAME) SOURCES_ABS=$(addprefix $(SRCROOT)/,$(SOURCES)) INFOPLIST_ABS=$(addprefix $(SRCROOT)/,$(INFOPLIST_FILE)) OBJECTS=\ $(patsubst %.c,%.o,$(filter %.c,$(SOURCES))) \ $(patsubst %.cc,%.o,$(filter %.cc,$(SOURCES))) \ $(patsubst %.cpp,%.o,$(filter %.cpp,$(SOURCES))) \ $(patsubst %.m,%.o,$(filter %.m,$(SOURCES))) \ $(patsubst %.mm,%.o,$(filter %.mm,$(SOURCES))) OBJECTS_ABS=$(addprefix $(CONFIGURATION_TEMP_DIR)/,$(OBJECTS)) APP_ABS=$(BUILT_PRODUCTS_DIR)/$(WRAPPER_NAME) PRODUCT_ABS=$(APP_ABS)/$(EXECUTABLE_NAME) all: $(PRODUCT_ABS) $(PRODUCT_ABS): $(APP_ABS) $(OBJECTS_ABS) $(LD) $(LDFLAGS) -o $(PRODUCT_ABS) $(OBJECTS_ABS) $(APP_ABS): $(INFOPLIST_ABS) mkdir -p $(APP_ABS) cp $(INFOPLIST_ABS) $(APP_ABS)/ $(CONFIGURATION_TEMP_DIR)/%.o: $(SRCROOT)/%.m mkdir -p $(dir $@) $(CC) $(CFLAGS) $(CPPFLAGS) -c $< -o $@ clean: echo rm -f $(OBJECTS_ABS) echo rm -rf $(APP_ABS) When I try to compile it with make, I get iPhoneTest.m: In fucntion '-[iPhoneTest applicationDidFinishLaunching:]' iPhoneTest.m:15: error: 'testView' undeclared <first use in this function> iPhoneTest.m:15: error: <Each undeclared identifier is reported only once for each function it appears in> Can anyone spot the problem?

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  • How to display total record count against models in django admin

    - by Rog
    Is there a neat way to make the record/object count for a model appear on the main model list in the admin module? I have found techniques for showing counts of related objects within sets in the list_display page (and I can see the total in the pagination section at the bottom of the same), but haven't come across a neat way to show the record count at the model list level.

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  • Microsoft.ACE.OLEDB.12.0 has not been Registered" Error

    - by brohjoe
    I'm getting a "The OLE DB provider "Microsoft.ACE.OLEDB.12.0 has not been registered" error. I have the data objects library downloaded and I have "Microsoft Office 12.0 Access database engine Object Library" selected. I'm running the Windows Vista 32-bit operating system. Any ideas would be greatly appreciated.

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  • C# what does the == operator do in detail?

    - by clamp
    in c# what does exactly happen in the background when you do a comparison with the "==" operator on two objects? does it just compare the addresses? or does it something like Equals() or CompareTo() ? PS: what about the "==" operator in java? does it behave the same?

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  • Convert array of hashes to array of structs?

    - by keruilin
    Let's say I have two objects: User and Race. User has two attributes: first_name, last_name. And Race has three attributes: course, start_time, end_time. Now let's say I create an array of hashes like this: user_races = races.map{ |race| {:user = race.user, :race = race} } How do I then convert user_races into an array of structs, keeping in mind that I want to be able to access the attributes of both user and race from the struct element?

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