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• Using java classes in Grails

  - by RN

  I have a Java\Spring\Hibernate application - complete with domain classes which are basically Hibernate POJOs There is a piece of functionality that I think can be written well in Grails. I wish to reuse the domain classes that I have created in the main Java app What is the best way to do so ? Should I write new domain classes extending the Java classes ? this sounds tacky Or Can I 'generate' controllers off the Java domain classes ? What are the best practices around reusing Java domain objects in Grails\Groovy I am sure there must be others writing some pieces in grails\groovy If you know about a tutorial which talks about such an integration- that would be awesome !!! PS: I am quite a newbie in grails-groovy so may be missing the obvious. Thanks !!!

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• Zend Framework: Flash Messenger, add a message from the model

  - by Dan

  Any idea on how best to add a message to flash messenger from the model? As FlashMessenger is an action helper, this seems not to be possible, so the obvious solution is to create an internal message object in the model, and return that to the controller from where you can use addMessage(). But if you want to return something else as well, this falls down. Another idea is an additional session namespace for these internal messages, which is then merged in with the Flash Messenger namespace messages at output time? Anyone have any thoughts or experience on this? Cheers.

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• Circular Dependency Solution

  - by gfoley

  Our current project has ran into a circular dependency issue. Our business logic assembly is using classes and static methods from our SharedLibrary assembly. The SharedLibrary contains a whole bunch of helper functions, such as a SQL Reader class, Enumerators, Global Variables, Error Handling, Logging and Validation. The SharedLibrary needs access to the Business objects, but the Business objects need access to SharedLibrary. The old developers solved this obvious code smell by replicating the functionality of the business objects in the shared library (very anti-DRY). I've spent a day now trying to read about my options to solve this but i'm hitting a dead end. I'm open to the idea of architecture redesign, but only as a last resort. So how can i have a Shared Helper Library which can access the business objects, with the business objects still accessing the Shared Helper Library?

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• SVN Delete with wildcard?

  - by David Lively

  I'm migrating a VSS repository to SVN and inadvertently included all of the _vti_cnf, *.scc files in the first check-in. I'd like to remove these from SVN. (Not permanently, of course - just in the HEAD). The application in question is quite large, and finding and deleting these files on a folder-by-folder basis will take forever. Suggestions? There must be some obvious way to do this, but the proximity of the weekend is interfering with my higher brain functions.

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• Most efficent way to create all possible combinations of four lists in Python?

  - by Baresi

  I have four different lists. headers, descriptions, short_descriptions and misc. I want to combine these into all the possible ways to print out: header\n description\n short_description\n misc like if i had (i'm skipping short_description and misc in this example for obvious reasons) headers = ['Hello there', 'Hi there!'] description = ['I like pie', 'Ho ho ho'] ... I want it to print out like: Hello there I like pie ... Hello there Ho ho ho ... Hi there! I like pie ... Hi there! Ho ho ho ... What would you say is the best/cleanest/most efficent way to do this? Is for-nesting the only way to go?

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• Cross domain cookie tracking

  - by Jon

  Hi, The company I work for has four domains and I'm trying to set up the cookies, so one cookie can be generated and tracked across all the domains. From reading various posts on here I thought it was possible. I've set up a sub domain on one site, to serve a cookie and 1*1 pixel image to all four sites. But I can't get this working on the other sites. If anyone can clarify that: Its possible? If I'm missing something obvious or a link to a good example? I'm trying to do this server side with PHP. Thanks

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• The "Why" behind PMD's rules.

  - by James Kingsbery

  Is there a good resource which describes the "why" behind PMD rule sets? PMD's site has the "what" - what each rule does - but it doesn't describe why PMD has that rule and why ignoring that rule can get you in trouble in the real world. In particular, I'm interested in knowing why PMD has the AvoidInstantiatingObjectsInLoops and OnlyOneReturn rules (the first seems necessary if you need to create a new object corresponding to each object in a collection, the second seems like it is a necessity in many cases that return a value based on some criteria). Just to be clear, I know that I can disable these and how to do that, I'm just wondering why they are there in the first place. Sorry if there's something obvious I missed out there, but I did a Google search and SO search before posting this.

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• Problem with extern keyword in C++

  - by Jeff

  What's the difference between the following two declarations? I thought they were equivalent, but the first sample works, and the second does not. I mean it compiles and runs, but the bitmap display code shows blank. I have not stepped through it yet, but am I missing something obvious? GUI_BITMAP is a simple structure describing a bitmap. This is for VC++ 2005, but I think it fails in VC++ 2008 also. Scratching my head on this one... Sample 1: extern "C" const GUI_BITMAP bmkeyA_cap_active; extern "C" const GUI_BITMAP bmkeyA_cap_inactive; Sample 2: extern "C" { const GUI_BITMAP bmkeyA_cap_active; const GUI_BITMAP bmkeyA_cap_inactive; };

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• iPad/iPod: autoRotate resizes view in window

  - by Jasconius

  Developing an iPad interface, I have a scenario where I have a UIViewController which manages a view that gets placed directly as a subview of the main UIWindow. Before being placed in the UIWindow, that view gets resized to a non-standard size, let's say, 768x460, and positioned at the bottom of the screen. When rotating the device, the autoRotate feature of the UIViewController causes the view to be resized so that it fills the entire UIWindow space. I thought this might be because in the XIB, the view is set to window size, but when I changed it to reflect the desired size, it still expanded it to the window size. Then I went into the MainWindow XIB and turned off autoresizeSubviews, and it still happens. This is a very frustrating problem, I am hoping that there is merely something obvious that I am missing out on. Anyone have any bright ideas?

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• What is dmake actually doing when installing a new module?

  - by aj-sin-dhal

  I just mangaged to install the perl/Tk module after much struggle. I realise I don't understand what dmake or make etc is actually doing. I am using strawberry perl installed at C:\strawberry. Fisrt I unpacked the module to another directory and ran perl makefile.pl which worked fine. Then I tried dmake which did not work. I guess that will be obvious to people who know how this works. When I placed the module as a sub-directory of C:\strawberry I could run perl makefile.pl, dmake, dmake test and dmake install. My guess is that dmake install is adding some executable files to the interpreter and to work the module must be in a subdirectory. Is there any article anywhere that explains what it is doing in detail?

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• Migrate existing ROR app to GAE

  - by zengr

  I have managed to run a basic rails app1 on App Engine using: http://gist.github.com/268192 So, on my basic app2, I install CE, which works fine on local machine. (communityengine.org) But, when I follow the same steps on my actual app2, where community_engine plugin is installed and all the gems are frozen, the app engine installer script asks for to over write various files like boot.rb, routes.rb, which I don't allow. So, as expected, when I publish the rails + ce app to GAE, it's not published and it also screws the local installation of CE on app2. So, the problem is obvious, CE uses ActiveRecord, and GAE uses DataMapper. So, my question can also be rephrased as: Can we migrate an existing ROR App using Active Record to GAE which uses DataMapper? PS: This is my first project on ROR and GAE.

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• django generic view update/create: update works but create raises IntegrityError

  - by smarber

  I'm using CreateView and UpdateView directely into urls.py of my application whose name is dydict. In the file forms.py I'm using ModelForm and I'm exluding a couple of fields from being shown, some of which sould be set when either creating or updating. So, as mentioned in the title, update part works but create part doesn't which is obvious because required fields that I have exluded are sent empty which is not allowed in my case. So the question here is, how should I do to fill exluded fields into the file forms.py so that I don't have to override CreateView? Thanks in advance.

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• Dialing a command prefix on the iPhone

  - by tewha

  Our application lets users call phone numbers. Users would like to be able to block their caller ID. On other platforms, we let the user specify a custom dialing prefix. For instance, on my cell provider it's #31#. I've tried two approaches so far. First: id url = [NSURL URLWithString: @"tel:#31#0000000"] // produces nil Second: id encoder = ["#31#0000000" stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding]; // produces %2331%230000000 id url = [NSURL URLWithString: [NSString stringWithFormat: @"tel:%@", encoded]]; // produces a valid-looking NSURL which doesn't do anything I'm thinking at this point that I'm just not allowed to dial # and *, even from a Cocoa touch application. (I know it's not allowed from a web app.) Is this true, or am I missing something obvious?

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• Measuring Web Page Performance on Client vs. Server

  - by Yaakov Ellis

  I am working with a web page (ASP.net 3.5) that is very complicated and in certain circumstances has major performance issues. It uses Ajax (through the Telerik AjaxManager) for most of its functionality. I would like to be able to measure in some way the amounts of time for the following, for each request: On client submitting request to server Client-to-Server On server initializing request On server processing request Server-to-Client Client rendering, JavaScript processing I have monitored the database traffic and cannot find any obvious culprit. On the other hand, I have a suspicion that some of the Ajax interactions are causing performance issues. However, until I have a way to track the times involved, make a baseline measurement, and measure performance as I tweak, it will be hard to work on the issue. So what is the best way to measure all of these? Is there one tool that can do it? Combination of FireBug and logging inserted into different places in the page life-cycle?

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• Mysql IN clause, php array

  - by robert knobulous

  I know that this has been asked and answered before, but for the life of me I cannot find where I am going wrong. My code is below. $backa = array("1", "7", "8", "9", "12"); $backaa = implode(",", $backa); /* code to create connection object $wkHook */ $getOpt=$wkHook->prepare("select movementId, movementName from Movement where movementId IN ($backaa) order by movementName asc"); $getOpt->execute(); $getOpt->store_result($id, $name); Every time I run this I get one of two errors depending upon how I use the $backaa variable. More often than not I get a call to a non-object error indicating that $getOpt is not a proper Mysql query. I have tried every fashion of quoting, bracketing, etc for the $backaa variable but it's just not working for me. What obvious thing am I missing?

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• Retrieving JSON from a web URL

  - by npeterson

  This may be a terribly uninformed question, brace yourself. A company I'm working with has given an 'API' that I can use to access orders, however, there are only two real commands, getorders and getorderdetails. These commands are put in the format of http://www.server.com/path/to/the/orderapi/getorders/UniqueKey/ If I go to that web address, I'm prompted for a username and password, and once authenticating, get presented with a page of JSON formatted order details, contained in the body of the html page. I would like a service to check this information and create orders in our crm based on it, is there an obvious way to access it without the browser/client interaction?

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• Intergration of checkout badges into an order form

  - by Reno

  Hi Does anyone know how to integrate several checkout badges into an order form? It might sound obvious to all (or most) but within the html wouldn't the form tag have an action to just one of the online merchants and not all? For example? I would like to have a basic order form which collects a users name, email, uploaded files, project details, and a few packages to choose from. Once they have selected the package most appropriate to them? They would be given a total cost and asked to pay via Paypal, Google Checkout OR Moneybookers. Can anyone help me out on this? Or point me in the direction where I can obtain further knowledge? Thanks in advance. Reno

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• Big O complexity of simple for not always linear?

  - by i30817

  I'm sure most of you know that a nested loop has O(n^2) complexity if the function input size is n for(int i = 0; i < n; i++){ for(int j = 0; j < n; j++){ ... } } I think that this is similar, by a analogous argument, but i'm not sure can anyone confirm? for(int i = 0, max = n*n; i < max; i++{ ... } If so i guess that there is some kinds of code whose big O mapping is not immediately obvious besides recursion and subroutines.

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• Database of common translated phrases for localization?

  - by richardtallent

  I'd like to localize my app into a few other languages, all of which I can barely order a drink in. Does anyone know of an online resource for translations of common software menu options, messages, etc. into other languages? Given the number of developers (both OSS and closed-source) that deal with localization, and the overlap of resource strings between, it seems like a pretty obvious fit for a wiki or open source package, but I can't seem to find anything like this. I could try to mine the Windows resource files or dig around in resource strings in robust OSS apps like Firefox, but I suspect I'm not the first person to think of this and surely there is a site that I'm just not finding yet. Update: since nothing exists like this that I could find, I started a feeble attempt at an open-source string library. It's just a boilerplate Google spreadsheet now, so if you want to contribute, please go here: http://www.xark.org/

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• Is It Possible To Use Javascript/CSS To Swap Style Sheets When A Mobile Device Rotates?

  - by Sean M

  I am working on a site that must be designed with mobile accessibility in mind. As part of our brainstorming, we wondered whether it's possible to detect, for a mobile browser (i.e. Mobile Safari or the Android browser), when the viewing device has changed orientation, and to use that as a trigger to change page content? As the title of this question implies, our best-case scenario is the ability to detect the orientation change and use it to alter the CSS on the fly so as to present a slightly different page for landscape versus portrait. Of course we can just design for a page that looks good one way and make it obvious that it's supposed to be viewed that way, but the cool-stuff factor of a page that looks good either way is pretty appealing. Is this idea implementable? Practical?

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• How to handle data output in an Observer?

  - by Mannaz

  I have an Observable and an Observer. The observable does download some stuff in a background thread and calls notifyObservers to let the observers read the status. At some point in public void update the observer tries to updates the GUI ((TextView)findViewById('R.id.foo')).setText("bar"); but it seems like the observable thread calls this method, because the Observable (!!!) throws this: android.view.ViewRoot$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views. at android.view.ViewRoot.checkThread(ViewRoot.java:2462) at android.view.ViewRoot.requestLayout(ViewRoot.java:512) ... at com.mynamespace.acitivty.TrackActivity.startPlay(TrackActivity.java:72) at com.mynamespace.acitivty.TrackActivity.update(TrackActivity.java:107) at java.util.Observable.notifyObservers(Observable.java:147) at java.util.Observable.notifyObservers(Observable.java:128) at com.mynamespace.module.communication.Download.stateChanged(Download.java:213) at com.mynamespace.module.communication.Download.run(Download.java:186) at java.lang.Thread.run(Thread.java:1058) Is there some way I can prevent this from happening? I'm sure I'm missing something obvious here.

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• .NET Lambda Pass Method Parameter

  - by RM

  Hi All, I hope i'm missing something obvious, but I'm having some troubles defining a method that takes a parameter of a method to fetch the method information for the passed method. I do NOT want actually execute the method. I want to be able to do: busObject.SetResolverMethod<ISomeInterface>(x=>x.GetNameById); Where GetNameById is a method defined on the interface ISomeInterface. In this case, an example of the method being passed in's signature would be: MyVarA GetNameById(int id){ .... } In the above example, the SetResolverMethod's body should be able to return / store the string "GetNameById". There is no standard signature the method being passed in will conform to (except that it will always return an object of some kind). Currently I'm setting the method as a string (i.e. "GetNameById"), but I want it to be compile time checked, hence this question.

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• Get user-inputed file name from JFileChooser Save dialog box

  - by Anya

  This answer to this question may seem obvious, but I'm actually struggling with it quite a bit. I've searched through JFileChooser methods in the API, and I've looked at some of the questions already asked and answered here on stackoverflow. My question is this. In my program, I am to allow the user to type in a file name which I will then use to create a brand new file that I will write on. How do you get the text the user has entered in the textfield next to the label "Save As:" on the Save dialog box provided by JFileChooser? Is there a JFileChooser method that would allow me to get that user-inputed text? Or would I have to go through another class, or do something else to get that text? Thank you so much, to anyone who answers. It's very late for me now, and this program is due in a few hours (meaning I'll be having another sleepless night). Desperate may be too strong a word, but I'm something close enough.

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• Django file uploads - Just can't work it out

  - by phoebebright

  OK I give up - after 5 solid hours trying to get a django form to upload a file, I've checked out all the links in stackoverflow and googled and googled. Why is it so hard, I just want it to work like the admin file upload? So I get that I need code like: if submitForm.is_valid(): handle_uploaded_file(request.FILES['attachment']) obj = submitForm.save() and I can see my file in request.FILES['attachment'] (yes I have enctype set) but what am I supposed to do in handle_uploaded_file? The examples all have a fixed file name but obviously I want to upload the file to the directory I defined in the model, but I can't see where I can find that. def handle_uploaded_file(f): destination = open('fyi.xml', 'wb+') for chunk in f.chunks(): destination.write(chunk) destination.close() Bet I'm going to feel really stupid when someone points out the obvious!

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• Representing Sparse Data in PostgreSQL

  - by Chris S

  What's the best way to represent a sparse data matrix in PostgreSQL? The two obvious methods I see are: Store data in a single a table with a separate column for every conceivable feature (potentially millions), but with a default value of NULL for unused features. This is conceptually very simple, but I know that with most RDMS implementations, that this is typically very inefficient, since the NULL values ususually takes up some space. However, I read an article (can't find its link unfortunately) that claimed PG doesn't take up data for NULL values, making it better suited for storing sparse data. Create separate "row" and "column" tables, as well as an intermediate table to link them and store the value for the column at that row. I believe this is the more traditional RDMS solution, but there's more complexity and overhead associated with it. I also found PostgreDynamic, which claims to better support sparse data, but I don't want to switch my entire database server to a PG fork just for this feature. Are there any other solutions? Which one should I use?

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