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• ShowDialog and Hide form, when from is called from other object in VS2010

  - by Piotr Dabrowski

  Hallo, I have a modal Form, used for searching information in DB. This Form is used by a COM object, that waits for search result. Initialization of the form take a lot of time (because of building connection to DB). So, I initialize the Form (without showing it), and keep Form-object alive, as long as COM-object work. In this way I keep the state of the Form: public void Search() this.ShowDialog(); string result = this.ResultOfSearch; this.Hide() return result; And it doesn't work anymore on VS2010 (compiled for Framework 2.0). I search for alternative way to make a modal form (or a method to protect a form against Destroy() at the end of ShowDialog). Any ideas?

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• Should default passwords always be empty?

  - by mafutrct

  I'm currently designing a system that requires an admin to log in using a password. For certain reasons, it is difficult to set this password during installation, but it can be changed later. My idea is this: If I leave the default password empty, it is so horridly insecure that every admin is going to fix this as soon as possible. If I were to use some kind of predefined password instead, admins may think "ah.. nobody would think I've got 'defaultpassword' as my password so it's not very important to change." So the basic thought is to make it so terrible that even the most lazy people are going to do something about it.

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• How can I fake sql data while preserving statements without commenting my server-side code?

  - by Fedor

  I have to use hardcoded values for certain fields because at this moment we don't have access to the real data. When we do get access, I don't want to go through a lot of work uncommenting. Is it possible to keep this statement the way it is, except use '25' as the alias for ratecode? IF(special.ratecode IS NULL, br.ratecode, special.ratecode) AS ratecode, I have about 8 or so IF statements similar to this and I'm just too lazy ( even with vim ) to re-append while commenting out each if statement line by line. I would have to do this: $sql = 'SELECT u.*,'; // IF ( special.ratecode IS NULL, br.ratecode, special.ratecode) AS ratecode $sql.= '25 AS ratecode';

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• Calling As function from js problem

  - by Gene

  I have a swf file that is not controlled by me. The swf expects a javascript call to set some variables after initialization. The swf is embedded using the swfobject and I'm trying to call the as function right after the embed. This appears to be too soon because I get an error. Everything else should be fine since calling the as function manually via firebug does not produce the error. So the question is how do I call the function when the embed is complete?

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• StructureMap singleton behavior not working

  - by user137348

  My code is public static class ContainerBootstrapper { public static void BootstrapStructureMap() { ObjectFactory.Initialize(x => x .ForRequestedType<ValueHolder>() .CacheBy(InstanceScope.Singleton) .TheDefaultIsConcreteType<ValueHolder>()); } } Initialization code (its a windows service) static class Program { static void Main() { ServiceBase[] ServicesToRun; ServicesToRun = new ServiceBase[] { new AppServer() }; ServiceBase.Run(ServicesToRun); ContainerBootstrapper.BootstrapStructureMap(); } } And then I call an instance like this: var valueHolder = ObjectFactory.GetInstance<ValueHolder>(); But I get everytime an new instance not the one used before.

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• How can I neatly clean my R workspace while preserving certain objects?

  - by briandk

  Suppose I'm messing about with some data by binding vectors together, as I'm wont to do on a lazy sunday afternoon. x <- rnorm(25, mean = 65, sd = 10) y <- rnorm(25, mean = 75, sd = 7) z <- 1:25 dd <- data.frame(mscore = x, vscore = y, caseid = z) I've now got my new dataframe dd, which is wonderful. But there's also still the detritus from my prior slicings and dicings: > ls() [1] "dd" "x" "y" "z" What's a simple way to clean up my workspace if I no longer need my "source" columns, but I want to keep the dataframe? That is, now that I'm done manipulating data I'd like to just have dd and none of the smaller variables that might inadvertently mask further analysis: > ls() [1] "dd" I feel like the solution must be of the form rm(ls[ -(dd) ]) or something, but I can't quite figure out how to say "please clean up everything BUT the following objects."

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• Implement abstract class as a local class? pros and cons

  - by sinec

  Hi, for some reason I'm thinking on implementing interface within a some function(method) as local class. Consider following: class A{ public: virtual void MethodToOverride() = 0; }; A * GetPtrToAImplementation(){ class B : public A { public: B(){} ~B(){} void MethodToOverride() { //do something } }; return static_cast<A *>(new B()); } int _tmain(int argc, _TCHAR* argv[]) { A * aInst = GetPtrToAImplementation(); aInst->MethodToOverride(); delete aInst; return 0; } the reason why I'm doing this are: I'm lazy to implement class (B) in separate files MethodToOverride just delegates call to other class Class B shouldn't be visible to other users no need to worry about deleting aInst since smart pointers are used in real implementation So my question is if I'm doing this right? Thanks in advance!

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• Fancybox2 Inline Content Gallery

  - by beefchimi

  I am trying to create a gallery of inline content with Fancybox 2, and am failing miserably. I checked out some other resources online and they seem to indicate doing this relatively easily, yet, I cannot seem to get it to work. Here is my fiddle: http://jsfiddle.net/beefchimi/jtxHd/2/ Now, I feel like the fiddle is not loading the resources, so thats a problem. But even with the resources this does not work, I get the fancybox error. Resources: http://fancyapps.com/fancybox/source/jquery.fancybox.pack.js?v=2.1.3 http://fancyapps.com/fancybox/source/jquery.fancybox.css?v=2.1.3 Any help would be greatly appreciated. EDIT: So I can't submit my question without including some code, because linking to jsfiddle isn't okay, so, here is my fancybox initialization, which you will also find in the jsfiddle: $(document).ready(function() { $('a.inlinepopup').fancybox({ 'width' : '75%', 'height' : '75%', 'autoScale' : false, 'type' : 'iframe' }); });

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• Select item in CascadingDropDown via JavaScript & invoke update

  - by akosch

  In code-behind I can do this to select something: // Select item in first DropDownList myCascadingDropDown_1.SelectedValue = itemValue_1+":::"+itemText_1; // Select item in second DropDownList myCascadingDropDown_2.SelectedValue = itemValue_2+":::"+itemText_2; How can I do this in JavaScript? (I'm aware, that I could search the list and set the selectedIndex property for each dropdown, but I have many items and i'm very lazy.) EDIT: npups answer works: I can select my desired item in the first dropdownlist. The problem is however, that new values based on that selected item (it is a CascadingDropDown, remember?) don't show in the second dropdown so I can't select anything there. I would need to somehow invoke the update method of the second dropdown manually: any suggestions?

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• jQuery UI: how to run evaluation

  - by mikkelbreum

  I want to add 'Year' or Years' to the end of a string depending on the string. Like this: $("#selector").val(conditional_value_here); Using jQuery UI I have a slider that manipulates a value: $("#slider").slider({ value: 1, min: 1, max: 25, step: 1, slide: function(event, ui) { $("#amount").val(ui.value + ' Year' + function(){return (ui.value == 1) ? '' : 's';} ); } }); // and again I want to do the same for the initialization of the value: $("#amount_3").val($("#slider_3").slider("value") + ' Jahr' + function(){return ($("#slider_3").slider("value") == 1) ? '' : 's';}); This does not work. What is the correct way to to this?

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• specyfic syntax question

  - by bua

  Hi there, Is it possible to create template to the initialization like: template <typename C> typename C::value_type fooFunction(C& c) {...}; std::vector<string> vec_instance; fooFunction(cont<0>(vec_instance)); fooFunction(cont<1>(vec_instance)); In general i'm interested is it possible to specify template using integer (ie. 0) instead of true type name. And how to achieve above?

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• How to write a build script for a C++ project

  - by Paul

  I am developing a C++ application on Ubuntu. The application consists of several modules, each with its makefile. I want to have a customised command line build process that does the following: checks code out from a repository (for specified branch/tag) builds the app (release or debug as specified) logs any errors etc I am too lazy to learn Perl (I tried before, but cant seem to get my head around it). Are there any (preferably open source) tools anyone can suggest, or maybe a simpler scripting languuage - or do I really have to learn Perl?

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• Why isn't the compiler smarter in this const function overloading problem?

  - by Frank

  The following code does not compile: #include <iostream> class Foo { std::string s; public: const std::string& GetString() const { return s; } std::string* GetString() { return &s; } }; int main(int argc, char** argv){ Foo foo; const std::string& s = foo.GetString(); // error return 0; } I get the following error: const1.cc:11: error: invalid initialization of reference of type 'const std::string&' from expression of type 'std::string* It does make some sense because foo is not of type const Foo, but just Foo, so the compiler wants to use the non-const function. But still, why can't it recognize that I want to call the const GetString function, by looking at the (type of) variable I assign it to? I found this kind of surprising.

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• dojo dynamic right click context menu

  - by levy

  There are tons of different dojo right click context menus in a page slowing down the browser. Some divs have context menus while some others don't. So I just can't have a dynamic global context menu and still be able to fallback to the browser's built in menu in some cases, do I? The non lazy instantiation of the dojo context menus just take too much time. How can I make those context menus dynamic? Preferably being created on demand when the user actually right clicks on them.

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• How to manage memory for ios with large csv files?

  - by Pell000

  I'm new to ios development, and I'm running into issues relating to memory management and my approaches to dealing with large datasets. Right now, I am loading the csv files and storing the relevant data as objects in memory at app initialization. Some of the csv files are larger than 1MB, and in total, my app uses about 180MB of memory. This is obviously way too high of a number (unless the info I found is wrong and this is an acceptable number, then please let me know). I feel as though there is a fundamental flaw in my approach: is there a way I can avoid storing the csv files in the project itself? Or, is there a kind of "lazy" loading I can do so that I can simply look up info in the csv file, as opposed to loading all of the data from it at once? Any help would do. I think that I need a new perspective in how to manage this more efficiently.

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• Optimal way to initialize varying objects

  - by John Smith

  I have to initialize a lot of different types of objects based on an integer parameter. They all have the same overall initialization methods. At the moment I have the following code #def APPLE 1 #def PEAR 2 switch (t) { case APPLE: newobj = [[FApple alloc] init]; break; case PEAR: newobj = [[FPear] alloc] init]; break; default: retobj = nil; } I believe there must be a better way to do this. When I add FOrange I have to go and add another line here. What would be a better way?

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• Callback exception/error handling for ASP TreeView OnTreeNodePopulate?

  - by MHutchinson

  We're using an asp:TreeView configured with lazy loading. The callback method assigned for OnTreeNodePopulate throws an exception if the user has been logged out since the page was loaded. What we want to do is to direct the user to the login page. First attempt was to catch the exception on the server and try Response.Redirect(...), but that doesn't work because you can't redirect within a callback. I've tried various other approaches, including using ClientScript.RegisterStartupScript(...) but that doesn't seem to work for OnTreeNodePopulate. If there was some way we could hook into the callback event handling on the client side then it would be easy, but the TreeView doesn't seem to offer anything here. Suggestions?

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• MVC more specified models should be populated by more precise query too?

  - by KevinUK

  If you have a Car model with 20 or so properties (and several table joins) for a carDetail page then your LINQ to SQL query will be quite large. If you have a carListing page which uses under 5 properties (all from 1 table) then you use a CarSummary model. Should the CarSummary model be populated using the same query as the Car model? Or should you use a separate LINQ to SQL query which would be more precise? I am just thinking of performance but LINQ uses lazy loading anyway so I am wondering if this is an issue or not.

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• Convert sets to frozensets as values of a dictionary

  - by Space_C0wb0y

  I have dictionary that is built as part of the initialization of my object. I know that it will not change during the lifetime of the object. The dictionary maps keys to sets. I want to convert all the values from sets to frozensets, to make sure they do not get changed. Currently I do that like this: for key in self.my_dict.iterkeys(): self.my_dict[key] = frozenset(self.my_dict[key]) Is there a simpler way to achieve this? I cannot build frozenset right away, because I do not how much items will be in each set until i have built the complete dictionary.

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• Misunderstanding function pointer - passing it as an argument

  - by Stef

  I want to pass a member function of class A to class B via a function pointer as argument. Please advise whether this road is leading somewhere and help me fill the pothole. #include <iostream> using namespace std; class A{ public: int dosomeA(int x){ cout<< "doing some A to "<<x <<endl; return(0); } }; class B{ public: B(int (*ptr)(int)){ptr(0);}; }; int main() { A a; int (*APtr)(int)=&A::dosomeA; B b(APtr); return 0; } This brilliant piece of code leaves me with the compiler error: cannot convert int (A::*)(int)' toint (*)(int)' in initialization Firstly I want it to compile. Secondly I don't want dosomeA to be STATIC.

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• Oracle Hibernate with in Netbean RCP

  - by jurnaltejo

  All, i have a problem with hibernate using netbean platform 6.8, i have been search around internet, but cannot found the suitable answer This is my story. i am using oracle database as data source of my hibernate entity with ojdbc14.jar driver. First i create hibernate entity tobe wrapped latter in a netbeans module, i tested the hibernate connection configuration and everything just works well. i can connect to oracle database successfuly, every hibernate query works well. Then i wrapped that hibernate entity jar as a netbeans module, create another module to warp my ojdbc14.jar then i test it. and, im using hibernate library dependency that available on netbean platform (netbean 6.8), but unfutornatelly i got oracle sql error saying “no suitable driver for [connection url]” when running the project. thats quite weird since it doesn’t happend when I test it before with out netbean platform. i thought that is related to netbeans lazy loading issue, i am not sure,. any idea ? tq for help

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• How to invoke a Servlet (doGet) in a web application on startup?

  - by Dan

  I need to invoke a Servlet on application startup since it contains some application initialization logic. I know I can set load-on-startup configuration, but this will only invoke Servlet’s init method. I need to invoke a doGet method and pass some Url parameters to it. Servlet doGet method expects ServletRequest and ServletResponse objects. Also, since this is clustered application, I need to know exactly what node I am accessing (since one option is just to open a socket and invoke a Servlet). What is the best option to perform this?

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• Function 'didFinishLaunchingWithOptions' getting invoked inappropriately

  - by clint

  I connected my IOS device to a MAC processor and installed/initialized my app running in xcode or dragged it from itunes folder. Now i physically disconnected my device from the processor and through wifi enabled in the device, sent notifications/messages through APNS to the device. I was able to successfully receive notifications in the device. Now after some time, i reconnected the device to the processor, which lead to a problem of the app launching again and calling 'didFinishLaunchingWithOptions' method again, which is not desirable as the launch/initialization should happen only once. This behaviour is random ie. every time when i disconnect/reconnect, it is not happening, only sometimes. Why is this happening. What could be the reason for this random behaviour. Any help will be appreciated.Thanks

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• Two phase Construction in C++

  - by tommieb75

  I have as part of assignment to look into a development kit that uses the "two-phase" construction for C++ classes: // Include Header class someFubar{ public: someFubar(); bool Construction(void); ~someFubar(); private: fooObject _fooObj; } In the source // someFubar.cpp someFubar::someFubar : _fooObj(null){ } bool someFubar::Construction(void){ bool rv = false; this->_fooObj = new fooObject(); if (this->_fooObj != null) rv = true; return rv; } someFubar::~someFubar(){ if (this->_fooObj != null) delete this->_fooObj; } Why would this "two-phase" be used and what benefits are there? Why not just instantiate the object initialization within the actual constructor?

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• Faster way of initializing arrays in Delphi

  - by Max

  I'm trying to squeeze every bit of performance in my Delphi application and now I came to a procedure which works with dynamic arrays. The slowest line in it is SetLength(Result, Len); which is used to initialize the dynamic array. When I look at the code for the SetLength procedure I see that it is far from optimal. The call sequence is as follows: _DynArraySetLength - DynArraySetLength DynArraySetLength gets the array length (which is zero for initialization) and then uses ReallocMem which is also unnecessary for initilization. I was doing SetLength to initialize dynamic array all the time. Maybe I'm missing something? Is there a faster way to do this?

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