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• LINQ to Entities and Business / Validation Rules

  - by Chris

  We have a requirement where we need to allow users to dynamically create custom reports that will run against our database and return sets of data. It would be something similar to this: http://www.marcuswhitworth.com/2009/12/dynamic-linq-with-expression-trees/ but would ultimately contain the ability to create more complicated logic. I believe LINQ to Entities might possibly allow us to do something like we're attempting to achieve. I should note that these reports are going to need to run against multiple tables. Can anyone point me in the right direction for something like this? Has anyone done anything similar with LINQ to Entities?

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• How to: Save order of tabs when customizing tabs in UITabBarController

  - by Canada Dev

  I am having problems finding any other information than the docs for how to save the tab order for my UITabBarController, so that the user's customization is saved for next app launch. I have searched online, but have been unable to find any blog posts or articles that goes through the proper code for doing this. I realize I have to use the delegate methods for the UITabBarController (didEndCustomizingViewControllers:) but I am not sure how I best approach persistance in terms of saving the state of the order the user wants the tabs in. Can someone post some code, point me in the right direction or perhaps you have a link for something saved? :) Thanks

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• What guides or standards do you use for version control in your team ?

  - by PaulHurleyuk

  I'm starting to do a small amount of development within my company. I'm intending to use Git for version control, and I'm interested to see what guidelines or standards people are using around version in their groups, similar to coding standards are often written within the group for the group. I'm assuming there will be things like; Commit often (at least every day/week/meeting etc) Release builds are always made from the master branch Prior to release, a new branch will be created for Testing and tagged as such. only bug fixes from this point onwards. The final release of this will be tagged as such and the bug fixes merged back into the trunk Each developer will have a public repo New features should get their own branch Obviously a lot of this will depend on what cvs you're using and how you've structured it. Similar Questions; http://stackoverflow.com/questions/273695/git-branch-naming-best-practices http://stackoverflow.com/questions/2006265/is-there-an-standard-naming-convention-for-git-tags

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• C# Compiler should give warning but doesn't?

  - by Cristi Diaconescu

  Someone on my team tried fixing a 'variable not used' warning in an empty catch clause. try { ... } catch (Exception ex) { } - gives a warning about ex not being used. So far, so good. The fix was something like this: try { ... } catch (Exception ex) { string s = ex.Message; } Seeing this, I thought "Just great, so now the compiler will complain about s not being used." But it doesn't! There are no warnings on that piece of code and I can't figure out why. Any ideas? PS. I know catch-all clauses that mute exceptions are a bad thing, but that's a different topic. I also know the initial warning is better removed by doing something like this, that's not the point either. try { ... } catch (Exception) { } or try { ... } catch { }

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• Lablgtk2 Installation on Windows.

  - by Animesh

  Hi there people, I am currently relearning Ocaml and am in the need of a good editor. There is a new editor from OcamlForge: OCamlEditor http://ocamleditor.forge.ocamlcore.org/. Prerequisite for installation is Lablgtk2. Installing Lablgtk2 on windows is not straight forward and there is good instruction here: http://wwwfun.kurims.kyoto-u.ac.jp/soft/lsl/install-win32.txt I have completed the first two steps and in the third step, as warned, it is failing on the native code version. This is where I am left stranded. How do I check to see if the assembler is on my path? What am I missing here? Please help me move forward from this point. Sincere thanks. Animesh

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• How to change object positions in an android layout?

  - by Pedro Santos

  Hi, I'm currently working on a very simple aplication, and I intended to make it change the visual aspect depending on the screen size. The application just has 6 buttons like this: http://www.freeimagehosting.net/uploads/e1efb4c4d0.jpg I'm using the AbsoluteLayout, and changing the x and y of the buttons with the methods offsetLeftAndRight and offsetTopAndBottom. I'm not changing the layout of the buttons in the xml file, so the all start in the same place. However, if I use this methods inside the onClickMethod they sometimes appear where I want them, sometimes don't (can't figure out why), but if i use them in the onCreate method, nothing happens. Can someone point me in the right direction? Thanks

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• DDE Server Windows:orcascr9.exe: Application Error

  - by Critical Skill

  Hello I've looked at the queries on SO that pertain to similar errors - but haven't found anything so far, to help with this particular problem I am having with an orcascript which I am running under Powerbuilder9.0. The orca script connects to an SCC service provider, does a full target refresh, and then is supposed to build the exe. It never gets to the last step though. The log is not very informative and simply says this at the point of failure: PBORCA_SccRefreshTarget. Full Rebuild Calling cm_rebuild_application(CM_REBUILD_FULL) While the script is at some way into this above step, it exits and throws up the DDE server error. Can someone help me figure this one out? I just barely know the basics of PB, and the intent of this exercise is to convert an IDE-based build that I inherited, into an orcascript build so that i can run the build unmonitored. Thanks in advance!

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• VBScript - copy files modified in last 24 hours

  - by Martin North

  Hi, I'm trying to copy files from a directory where the last modified date is within 24hours of the current date. I'm using a wildcard in the filepath as it changes every day I'm using; option explicit dim fileSystem, folder, file dim path path = "d:\x\logs" Set fileSystem = CreateObject("Scripting.FileSystemObject") Set folder = fileSystem.GetFolder(path) for each file in folder.Files If DateDiff("d", file.DateLastModified, Now) < 1 Then filesystem.CopyFile "d:\x\logs\apache_access_log-*", "d:\completed logs\" WScript.Echo file.Name & " last modified at " & file.DateLastModified end if next Unfortunately this seems to be copying all files, and not just the recently modified ones. Can anyone point me in the right direction? many thanks Martin.

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• GAE transaction exceptions

  - by bach

  Hi, In this example IS the exception being thrown if ANY of the Table elements are being changed by another client OR only if the element that we changed has been changed by another client? Just to verify - the exception is thrown from the commit() isn't it? PersistenceManager pm = PMF.get().getPersistenceManager(); try { pm.currentTransaction().begin(); List<Row> Table = (List<Row>) pm.newQuery(query).execute(); Table.get(0).setReserved(true); // <----- we change only this element pm.currentTransaction().commit(); } catch (JDOCanRetryException ex) { pm.currentTransaction().rollback() // <----- if Table.get(1) was changed by another client do we get to this point??? }

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• How to solve JavaScript origin problem with an application and static file server

  - by recipriversexclusion

  In a system that I'm building I want to serve Static files (static HTML pages and a lot of images), and Dynamic XML generated by my servlet. The dynamic XML is generated from my database (through Hibernate) and I use Restlets to serve it in response to API calls. I want to create a static file server (e.g. Apache) so that this does not interfere with the dynamic server traffic. Currently both servers need to run on the same machine. I've never done something like this before and this is where I'm stuck: The static HTML pages contain JavaScript that makes API calls to the dynamic server. However, since the two servers operate on different ports, I get stuck with the same origin problem. How can this be solved? As a bonus, if you can point me to any resources that explain how to create such a static/dynamic content serving system, I'll be happy. Thanks!

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• Exposing APIs - third party or homegrown?

  - by amelvin

  Parts of the project I'm currently working on (I can't give details) will be exposed as an API at some point over the next few months and I was wondering whether anyone could recommend a third party API 'provider' (possibly Mashery or SO advertiser Webservius). And I mean recommend in the 'I've used these people and they are good' sense because although I can google for an answer to this question it is more difficult to get truly unbiased opinions. As an addendum is there much mileage in creating a bespoke API solution and has anyone had any joy going down that road? Thanks in anticipation.

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• Generating Running Sum of Ratings in SQL

  - by Koobz

  I have a rating table. It boils down to: rating_value created +2 april 3rd -5 april 20th So, every time someone gets rated, I track that rating event in the database. I want to generate a rating history/time graph where the rating is the sum of all ratings up to that point in time on a graph. I.E. A person's rating on April 5th might be select sum(rating_value) from ratings where created <= april 5th The only problem with this approach is I have to run this day by day across the interval I'm interested in. Is there some trick to generating a running total using this sort of data? Otherwise, I'm thinking the best approach is to create a denormalized "rating history" table alongside the individual ratings.

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• compiler warning on (ambiguous) method resolution with named parameters

  - by FireSnake

  One question regarding whether the following code should yield a compiler warning or not (it doesn't). It declares two methods of the same name/return type, one has an additional named/optional parameter with default value. NOTE: technically the resolution isn't ambiguous, because the rules clearly state that the first method will get called. See here, Overload resolution, third bullet point. This behavior is also intuitive to me, no question. public void Foo(int arg) { ... } public void Foo(int arg, bool bar = true) { ...} Foo(42); // shouldn't this give a compiler warning? I think a compiler warning would be kind of intuitive here. Though the code technically is clean (whether it is a sound design is a different question:)).

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• Problem with VisualBasic

  - by Michael

  Ok, I am sure this is simple but I am not able to figure it out and people on this site seem to be brains... I will admit this is for homework but it has nothing to do with how to code. Has to do with a silly error that I am unable to resolve. I try to debug and when I debug i get the following error ERROR "Visual Studio cannot start debugging because debut target 'C:\Documents and Settings\user\Desktop\programs6\HuricaneSeasonStatistics\bin\Debug\HuricaneStatistics.exe" is missing. Please build the project and retry, or set the OutputPath and AssemblyName properties appropriate to point a the correct location for the target assembly." I am fairly sure the error is in the OutputPath and or AssemblyName. but I am not sure where to change.

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• Passing a 'var' into another method

  - by Danny

  Hi, I am probably totally missing the point here but.... How can I pass a 'var' into another method? (I am using linq to load XML into an Enumerable list of objects). I have differernt object types (with different fields), but the final step of my process is the same regardless of which object is being used. XNamespace xmlns = ScehmaName; var result = from e in XElement.Load(XMLDocumentLocation).Elements(xmlns + ElementName) select new Object1 { Field1 = (string)e.Element(xmlns + "field1"), Field2 = (string)e.Element(xmlns + "field2") }; var result2 = Enumerable.Distinct(result); This code will vary for the different type of XML files that will be processed. But I then want to iterate though the code to check for various issues: foreach (var w in result2) { if (w.CheckIT()) { //do something } } What I would love is the final step to be in a method in the base class, and I can pass the 'var' varible into it from each child class.

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• after_create :create a new line in DB

  - by Karl Entwistle

  Hey guys I was wondering if anyone could help me with an issue im having, basically id like to have Account.create after a PayPal notification is received, There is a simple cart model which corresponds to line_items within the cart so add_account_to_market would look like this in pseudo code def add_account_to_market if status == "Completed" find the line items(via cart_id) that correspond to the cart.id that just been paid create an account with user_id set to the current carts user id end end Ive never tried to do something like this in Rails and its not working, Ive been pulling my hair out all night trying to fix this, hopefully someone can help or point me in the right direction. Thanks :) class PaymentNotification < ActiveRecord::Base belongs_to :cart serialize :params after_create :mark_cart_as_purchased after_create :add_account_to_market private def mark_cart_as_purchased if status == "Completed" cart.update_attribute(:purchased_at, Time.now) cart.update_attribute(:paid, true) end end def add_account_to_market if status == "Completed" l = LineItem.find(:all, :conditions => "cart_id = '#{cart.id}'") for l.quantity Account.new(:user_id => cart.user_id) end end end end PS mark_cart_as_purchased method is working fine, its just the add_account_to_market im having issues with.

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• what does this code do?

  - by bstullkid

  It looks like this just sends a ping, but whats the point of that when you can just use ping? int main (int argc, char *argv[]) { unsigned int pid = 0; char buffer[2]; char *args[] = { "/bin/ping", "-c", "5", NULL, NULL }; if (argc != 2) return 0; args[3] = strdup(argv[1]); for (;;) { gets(buffer); /* FTW */ if (buffer[0] == 0x6e) break; switch (pid = fork()) { case -1: printf("Error Forking\n"); exit(255); case 0: execvp(args[0], args); exit(1); default: break; } } return 255; }

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• Relative Position in PHP between 2 points (Lat/Long)

  - by Brian H

  I have a database of airports with Latitude and Longitude for each point. I want to run a PHP script to find all airports that are nearby a given airport, with their distance and relative direction. I.e. for Airport KLDJ (40-37-02.810N 074-14-40.539W) Airport Nearby KJFK - John F Kennedy Airport (21.2 nm NE) (40-38-23.104N 073-46-44.132W) I have used code from http://www.movable-type.co.uk/scripts/latlong.html to find distance, and tried to use it to find bearing, which might not be right. //BEARING RHUMB LINE $phi = log(tan($lat2/2+pi/4)/tan($lat1/2+pi/4)); $distance['bearing'] = (rad2deg(atan2($theta, $phi)) +180) % 360; I basically want to run all points through this script and find the distance, which I have already, but then the direction. (i.e. N, S, W, E, NW, SW, NE, SE)

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• How can I teach a know-it-all beginner programmer?

  - by Liran Orevi

  I need to teach a teenage beginner programmer (private tutoring style). The problem is that despite their poor knowledge and skills, they are sure of their abilities, to the point where I find it hard to teach them "better ways". What's the best way to tackle this? Just to be clear what I'm talking about: Constantly changing between tools/IDEs/libraries when it's tough. Blind certainty that really bad designs are really very good. Copying and pasting from the Internet, without understanding the code, and "marking" it as a project.

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• NHibernate and SetSessionAuth audit columns

  - by user86431

  We have audit columns set by triggers. For obscure security reasons predating my tenure and out of my control, we log in with a generic user, and do a 'set session authorization' to change the user to the db user of the user who is logged in. When we converted to NHibernate, it creates a whole new session and jacks everything up when we try to do a set session auth, so we turned the set session auth off... Now we are trying to find out a way to get NHibernate to let us do 'set session authorization' without recycling the session on us, so we can use our existing trigger based audit column stuff with both legacy apps, and our new NHibernate apps. It's not a ideal soloution, or the best way to do it even, but is it possible? I was hoping there was a alternate interface that allowed this kind of access. Does anyone know how to do it, or can you point me towards and good hints? Thanks, Eric-

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• how can multiple trailing slashes can be removed from an url in Ruby

  - by splintercell

  Hello, What i'm trying to achieve here is lets say we have two example urls: url1 "http://emy.dod.com/kaskaa/dkaiad/amaa//////////" & url2 = "http://www.example.com/". How can I extract the striped down urls? url1 : "http://emy.dod.com/kaskaa/dkaiad/amaa" & url2 to "http://http://www.example.com"? URI.parse in ruby sanitizes certain type of malformed url but is ineffective in this case. If we use regex then /^(.*)\/$/ removes a single slash (/) from url1 & is ineffective for url2. Is anybody aware of how to handle this type of url parsing? The point here is I dont want my system to have "http://www.example.com/" & "http://www.example.com" being treated as two different urls. And same goes for "http://emy.dod.com/kaskaa/dkaiad/amaa////" & "http://emy.dod.com/kaskaa/dkaiad/amaa/" cheers, -dg

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• With ASP .NET, how do I display a side submenu depending on what user picked from the main menu?

  - by Ole Media

  Hello, I come from PHP side, but I'm in need to develop a site using ASP .NET So far I manage to create a master page. Now I'm dealing with menus and submenus What I'm trying to do is, if the user picks "About Us" from the main menu, under the about us page I want to display a submenu with the options "who we are, what we do, contact us" If the user picks "Our Products" from the main menu, then under the products page I want to display a submenu with the options "product 1, product 2, product 3" Is this possible with only one master page? I read something about menu control but not sure that is what I need. So far I found how to display a sitemap, but not specific sections of a sitemap, if this is the way to do things. Any links, sample code, point of reference will be appreciated. Thanks

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• Sql query - how to construct

  - by Max Malmgren

  Hi. I am working to implement a dataconnection between my C# application and an Sql Express database. Please bear in mind I have not worked with Sql queries before. I have the following relevant tables: ArticlesCommon ArticlesLocalized CategoryCommon CategoryLocalized where ArticlesCommon holds language independent information such as price, weight etc. This is the statement for now: SELECT * FROM ArticlesCommon INNER JOIN ArticlesLocalized ON ArticlesCommon.ID = ArticlesLocalized.ID WHERE ArticlesLocalized.Language = @language ORDER BY ArticlesCommon.DateAdded ArticlesCommon contains a category id for each row. Now, I want to use this to look up the localized information in CategoryLocalized and add it to the result, something like SELECT *, CategoryLocalized.Name as CategoryName. If I have gotten my point across, is this doable? Thank you.

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• Which browsers support font embedding.

  - by jonhobbs

  I've been reading about the @font-face rule and trying to work out if it's worth using it in a project to render "franklin gothic medium" for title instead of something like sIfr. I figured that for browsers that don't support it I could make it fall back on Arial. The thing is that I'm having trouble getting a definitive answer about which browsers support embedding fonts in this way. So far I've worked out the IE does, but doesn't support .ttf files. Other browsers I'm not sure. If anyone could point me towards some kinf of compatibility chart that would be great. Jon

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• sbt: "test" works "test:run" not

  - by Martin

  I try to establish a build pipeline on Jenkins with a Play(2.0.2) project. As I want to just build the sources once and use the classes for downstream builds, I now have created a "compile"-job, that runs "sbt test:compile". That works so far. The next job should then just run the compiled tests. If I use "sbt test" it works as expected, but compiles the sources again. But if I try to run "sbt test:run" it says: [info] Loading project definition from ~/myproject/project [info] Set current project to myproject (in build file: ~/myproject/) java.lang.RuntimeException: No main class detected. at scala.sys.package$.error(package.scala:27) [error] {file:~/myproject/test:run: No main class detected. The same happens locally. I can run "sbt test" but not "sbt test:run". Same error. Is there someone who can point me to the right direction?

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