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• many-to-many query

  - by kofto4ka

  Hello, guys! I have a problem and I dont know what is better solution. Okay, I have 2 tables: posts(id, title), posts_tags(post_id, tag_id). I have next task: must select posts with tags ids for example 4, 10 and 11. Not exactly, post could have any other tags at the same time. So, how I could do it more optimized? Creating temporary table in each query? Or may be some kind of stored procedure? In the future, user could ask script to select posts with any count of tags (it could be 1 tag only or 10 at the same time) and I must be sure that method that I will choose would be the best method for my problem. Sorry for my english, thx for attention.

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• class method or named_scope?

  - by Hadi

  i would like to have your opinion in a project i am currently working on. class Product has_many :orders end class Order attr_accessor :deliverable # to contain temporary data on how many items can be delivered for this order belongs_to :product end somehow i want to have Order.all_deliverable that will calculate the Product's quantity, subtract from list of Orders until the Product is empty or there is no more Order for this Product to illustrate Product A, quantity: 20 Product B, quantity: 0 Order 1, require Product A, quantity: 12 Order 2, require Product B, quantity: 10 Order 3, require Product A, quantity: 100 so if i call Order.all_deliverable, it will give Order 1, deliverable:12 Order 3, deliverable: 8 #(20-12) i have been thinking on using named_scope, but i think the logic will be too complex to be put in a named_scope. Any suggestion? the pseudo code for all_deliverable will be something like this: go to each orders find the remaining quantity for specific product deduct the product to max amount of order, if product is not enough, add the maximum product add to the order end From what i read around in the web, named_scope deal mostly like find and have not many method calling and looping.

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• strange nhibernate exception? "(0xc0000005 at address 5A17BF2A): likely culprit is 'PARSE'."

  - by nRk

  Hi i am gettin a strange exception in may windows service application, but it was working fine for a long time and suddenly gave this error: 2010-05-11 07:00:03,154 ERROR [0 ] [NHibernate.Cfg.Configuration.LogAndThrow] - Could not compile the mapping document: xxxx.hbm.xml NHibernate.MappingException: Could not compile the mapping document: xxxx.hbm.xml ---> System.InvalidOperationException: Unable to generate a temporary class (result=1). error CS0001: Internal compiler error (0x80004005) error CS0001: Internal compiler error (0xc0000017) error CS0583: Internal Compiler Error (0xc0000005 at address 5A17BF2A): likely culprit is 'PARSE'. error CS0586: Internal Compiler Error: stage 'PARSE' error CS0587: Internal Compiler Error: stage 'PARSE' error CS0587: Internal Compiler Error: stage 'BEGIN' any could help me in understanding this issue/error why it came and to solve it? Thanks nRk

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• 'Error serializing body'. Problem calling Fedex webservice through .NET 3.5

  - by Simon_Weaver

  I'm using Fedex's web services and getting an annoying error right up front before I can actually get anywhere. There was an error in serializing body of message addressValidationRequest1: 'Unable to generate a temporary class (result=1). error CS0030: Cannot convert type 'FedEx.InterOp.AddressValidationServiceReference.ParsedElement[]' to 'FedEx.InterOp.AddressValidationServiceReference.ParsedElement' error CS0029: Cannot implicitly convert type 'FedEx.InterOp.AddressValidationServiceReference.ParsedElement' to 'FedEx.InterOp.AddressValidationServiceReference.ParsedElement[]' '. Please see InnerException for more details. I'm using .NET 3.5 and get a horrible named class generated for me (I'm not sure why it isn't just AddressValidationService): AddressValidationPortTypeClient addressValidationService = new ...; on this class I make my web service call: addressValidationService.addressValidation(request); This is when I get this error. The only references I can find to this error come from ancient 1.1 projects. In my case my DLL has references to System.Web and System.Web.Services which seemed to be an issue back then.

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• Launching Vim via Lua

  - by Keith Pimmel

  I'm writing a simple little Lua commandline app that will build a static website. I'm storing my fragments in a sqlite database. Retrieving the data from the db is straightforward as is saving it; my question comes from editing the data. Is there an elegant way to pipe the data from Lua to vim? Can vim edit a memory buffer and return it? I was planning on launching the editor via os.execute('vim') but only after grabbing a temporary file handle and dumping the database output into that. I would like to have to avoid touching the filesystem that way but that is my contingency plan.

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• Garbage collection of Strings returned from C# method calls in ascx pages

  - by Icarus

  Hi, For a web application developed on ASP.NET, we are finding that for user control files (ascx) we are returning long strings as a result of method calls. These are embedded in the ascx pages using the special tags <% %> When performing memory dump analysis for the application, we find that many of those strings are not being garbage collected. Also, the ascx pages are compiled to temporary DLLs and they are held in memory. Is this responsible for causing the long strings to remain in memory and not be garbage collected ? Note : The strings are larger than 85K in size.

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• Is it possible to implement a GC.GetAliveInstancesOf<T>() (for use in debugging)?

  - by Omer Raviv

  Hi, I know this was answered before, but I'd like to pose a somewhat different question. Is there any conceivable way to implement GC.GetAliveInstancesOf(), that can be evaluated in Visual Studio Debug Watch window? Sasha Goldstein shows one solution in this article, but it requires every class you want to query inherit from a specific base class. I'll emphasize that I only want to use this method during debugging, so I don't care that the GC may change an object's address in memory during runtime. One idea might be to somehow harness the !dumpheap –type command of SOS, and do some magic trick to create a temporary variable and have it point out to the memory address printed by SOS. Does anyone have a solution that works?

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• Are we in a functional programming fad?

  - by TraumaPony

  I use both functional and imperative languages daily, and it's rather amusing to see the surge of adoption of functional languages from both sides of the fence. It strikes me, however, that it looks rather like a fad. Do you think that it's a fad? I know the reasons for using functional languages at times and imperative languages in others, but do you really think that this trend will continue due to the cliched "many-core" revolution that has been only "18 months from now" since 2004 (sort of like communism's Radiant Future), or do you think that it's only temporary; a fascination of the mainstream developer that will be quickly replaced by the next shiny idea, like Web 3.0 or GPGPU? Note, that I'm not trying to start a flamewar or anything (sorry if it sounds bitter), I'm just curious as to whether people will think functional or functional/imperative languages will become mainstream. Edit: By mainstream, I mean, equal number of programmers to say, Python, Java, C#, etc

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• Resolving patch conflicts manually

  - by Antony Hatchkins

  I've downloaded a patch from some site and trying to apply it (twisted, python web framework). Several hunks failed. How do I automate manual patching process using vim? Details: I'm trying to automate the process of applying failed hunks. Many tiny changes, each about adding/removing 1-2 chars. Difficult to see. I Have to create two new temporary files and :diffthis them manually to see the difference. Yes, outside VCS. I can imagine a neat way to deal with it using git, but I would prefer to avoid creating git repo for that.

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• Array.BinarySearch where a certain condition is met

  - by codymanix

  I have an array of a certain type. Now I want to find an entry where a certain condition is met. What is the preferred way to do this with the restriction that I don't want to create a temporary object to find, but instead I only want to give a search condition. MyClass[] myArray; // fill and sort array.. MyClass item = Array.BinarySearch(myArray, x=>x.Name=="Joe"); // is this possible? Maybe is it possible to use LINQ to solve it?

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• Wrapping allocated output parameters with a scoped_ptr/array

  - by Danra

  So, I have some code which looks like this: byte* ar; foo(ar) // Allocates a new[] byte array for ar ... delete[] ar; To make this safer, I used a scoped_array: byte* arRaw; scoped_array ar; foo(arRaw); ar.reset(arRaw); ... // No delete[] The question is, Is there any existing way to do this using just the scoped_array, without using a temporary raw array? I can probably write an in-place "resetter" class, just wondering if the functionality exists and I'm missing it. Thanks, Dan

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• Storing a value in Memory Independent of Process

  - by Ganesh

  Hi, I need a way to store a value somewhere for temporarily by say Process A. Process A can exit the after storing the value in memory. After sometime Process B comes accesses the same location of memory and read the value. I need to store in memory, because I dont want the data to persistent across reboots. But as long as the system is up, it Independent of the Process the data must be accessible. I tried MailSlots and Temporary files in windows, both seem to have problem where the process reference count drops to zero , the entities dont persist in memory. What is a suitable mechanism for this in Windows preferably using Win32 API? Ganesh

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• REST: Should I redirect to the version URL of an entity?

  - by sfussenegger

  I am currently working on a REST service. This service has an entity which has different versions, similar to Wikipedia articles. Now I'm wondering what I should return if for GET /article/4711 Should I use a (temporary) redirect to the current version, e.g. GET /article/4711/version/7 Or should I return the current version directly? Using redirects would considerably simplify HTTP caching (using Last-Modified) but has the disadvantages a redirect has (extra request, 'harder' to implement). Therefore I'm not sure whether this is good practice though. Any suggestions, advise, or experiences to share? (btw: ever tried search for "REST Version"? Everything you get is about the version of the API rather than entities. So please bear with me if this is a duplicate.)

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• What's wrong with my logic here?

  - by stu

  In java they say don't concatenate Strings, instead you should make a stringbuffer and keep adding to that and then when you're all done, use toString() to get a String object out of it. Here's what I don't get. They say do this for performance reasons, because concatenating strings makes lots of temporary objects. But if the goal was performance, then you'd use a language like C/C++ or assembly. The argument for using java is that it is a lot cheaper to buy a faster processor than it is to pay a senior programmer to write fast efficient code. So on the one hand, you're supposed let the hardware take care of the inefficiencies, but on the other hand, you're supposed to use stringbuffers to make java more efficient. While I see that you can do both, use java and stringbuffers, my question is where is the flaw in the logic that you either use a faster chip or you spent extra time writing more efficient software.

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• Compare values for audit trail

  - by kagaku

  I'm attempting to develop an audit trail/tracking solution for an existing database written in PLSQL/PHP - however I'm still unsure as of yet on an easy (to implement and maintain) solution for tracking changes to fields/values. For instance, the project tracking portion of the DB APP tracks over 200 fields and ideally I'd like a nice way to show a history of changes, such as: 5/10/2010 - Project 435232 updated by John Doe Changed Project Name (Old: Test Project; New: Super Test Project) Changed Submission Date (Old: 5/10/2010; New: 5/11/2010) Changed Description (Old: This is an example!; New: This is a test example) Essentially for each field (db column) it would output a new line to show the old/new values. So far my current idea is saving the current version of the data to a temporary table, updating the primary table with the new data then loading each row into an array and doing an array compare to determine the differences. This seems a bit convoluted, and if there is an easier method I'd love to know it. Any ideas or suggestions are much appreciated!

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• [wxWidgets] How to store wxImage into database, using C++?

  - by Thomas Matthews

  I have some wxImages and I would like to store them into a BLOB (Binary Large OBject) field in a MySQL database. There are no methods in wxImage nor wxBitmap for obtaining the binary data as an array of unsigned char so I can load into the database. My current workaround is to write the image to a temporary file, then load the BLOB field directly from the file. Is there a more efficient method to load and store a wxImage object into a MySQL BLOB field? I am using MySql C++ connector 1.05, MS Visual Studio 2008, wxWidgets and C++.

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• vs2008 mystery: Quick macro record and playback shortcuts not allowed?

  - by gerryLowry

  in vs2008, Tools, Macros, Record TemporaryMacro keyboard shortcut toggle is Ctrl+Shift+R; Run TemporaryMacro keyboard shorcut is Ctrl+Shift+P for playback. I've used them before, but they've stopped working. If I open Tools, Options, Keyboard, then navigate to a command like Tools.Run that has no assigned keyboard shortcut, I can experiment by pretending to assign a keyboard shorcut: I simply click inside the "Press shortcut keys:" textbox and try different keystroke combinations. Examples: Ctrl+p: currently assigned to File.Print Ctrl+r: currently assigned to various uses Ctrl+Shift+Q: available Ctrl+Shift+B: currently assigned to Build.BuildSolution BUT vs2008 will not even allow me to type either of Ctrl+Shift+P or Ctrl+Shift+R in the "Press shortcut keys:" textbox. When I type those combinations, nothing appears in the "Press shortcut keys:" textbox. Please note: I can record and playback a temporary macro by using the menu commands, however, the mouse is like a turtle when compared to the keyboard. Any ideas why this very useful vs2008 feature is broken? Thank you. Regards ~~ Gerry (Lowry)

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• Self-extracting Delphi program

  - by Steve

  I'm writing an updater program in Delphi7 which will be run once, but needs many files to run. What I'd like the achieve: 1, User runs exe 2, Exe unpacks files, runs updater 3, If updater detects and error, prompts the user to send log in e-mail 4, After the updater is run, temporary files are deleted (some of these files are dlls used by the updater program, so the updater has to be closed before the files can be deleted) Can anyone recommend a good solution? I've thought about using Inno Setup (too complicated for such an easy task) or using a self-extracting zip file (but how to delete the files afterwards)? Thanks!

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• SQL Server 2008 - Conditional Range

  - by user208662

  Hello, I have a database that has two tables. These two tables are defined as: Movie ----- ID (int) Title (nvchar) MovieReview ----------- ID (int) MovieID (int) StoryRating (decimal) HumorRating (decimal) ActingRating (decimal) I have a stored procedure that allows the user to query movies based on other user's reviews. Currently, I have a temporary table that is populated with the following query: SELECT m.*, (SELECT COUNT(ID) FROM MovieReivew r WHERE r.MovieID=m.ID) as 'TotalReviews', (SELECT AVG((r.StoryRating + r.HumorRating + r.ActingRating) / 3) FROM MovieReview r WHERE r.MovieID=m.ID) as 'AverageRating' FROM Movie m In a later query in my procedure, I basically want to say: SELECT * FROM MyTempTable t WHERE t.AverageRating >= @lowestRating AND t.AverageRating <= @highestRating My problem is, sometimes AverageRating is zero. Because of this, I'm not sure what to do. How do I handle this scenario in SQL?

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• Best solution for exporting Word documents to PDF programatically (without using a "software printer

  - by mbmccormick

  I'm looking for a way to export a Word document as a PDF. I would like to do this without the use of a "software printer" (such as CutePDF, etc.) and stick to reference assemblies if at all possible. I'm using Microsoft Office Interop Assemblies to generate a Word Document which I save to a temporary directory. So its not necessary for this solution to interact directly with Microsoft Office, unless it needs to. Any help or feedback you might have would be greatly appreciated! Thanks!

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• Auto-generate WebControls

  - by Adrian K

  I want to generate .net code from a template so that it more rapid, so lazy developers (and I mean that in the nicest possible way!) don't have to write them in the IDE, compile them, etc... I know I can roll my own tool which generates the code using reflection (by reading in some text file, etc), but I just wondered if there was an easier than starting from scratch since this is what ASP.NET basically does already; so is there anyway to leverage this? E.g. to quote Peter A. Bromberg: Even an ASPX page with no code on it gets turned into an instance of the System.Web.UI.Page class. The page is parsed by the ASP.NET engine when it is first requested, and then its JIT compiled version is cached in the Temporary ASP.NET Files folder as long as the application is running and the .aspx page hasn't been changed. Ideally I want to auto-generate WebControls, but examples of anything closely related will do. C# Examples preferred also, but anything considered :)

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• Multiple Grails Applications create Ehcache conflicts

  - by Lloyd Meinholz

  I am running multiple Grails Applications on one of my servers. I am using Grails 1.2.2. I am using the default cache configuration in DataSource.groovy. When I try and run two Grails applications, they both seem to be using/writing to: /tmp/org.hibernate.cache.UpdateTimestampsCache.data When I look at how to customize Ehcache with an ehcache.xml file from this page: http://ehcache.org/documentation/grails.html I do not see any information about specifying the locations and/or names or temporary files. How do I avoid this issue when running multiple Grails applications on the same server (without turning off the cache)?

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• How to utilize network for p2p file sharing on Android Platform?

  - by CSharperWithJava

  I'm working on some apps for the android platform and I have two problems that I'm not quite sure how to approach, and both are closely related. How can I send a relatively small data file from one android device to another (preferably over the internet or directly through wireless network)? Is it possible to create a temporary p2p live data stream from one android device to another? An example application would be to stream low-res video from phone A's camera to phone B, or audio. I would much appreciate being pointed in the right direction on either issue (File transfer or real time data transfer).

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• Will client JVM for a web service(https) throw an SSL Exception when the server is having a valid ce

  - by ring bearer

  I have a web service deployed on tomcat hosted on a remote server. I have set it up such that it can be accessed only via HTTPS. For this, I generated a Certificate Signing Request (CSR) and used it to get a temporary certificate from VeriSign. My web service client is on my local machine. If I try to access the service it will throw a javax.net.ssl.SSLHandshakeException:unable to find valid certification path to requested target If I install the certificate in to local Java's keystore, the issue will be resolved. My question is if I install a valid SSL certificate from a CA in to my tomcat server, will I get this client-side error even if I do not import the certificate to local key store?

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• Reading Windows ACLs from Java

  - by Matt Sheppard

  From within a Java program, I want to be able to list out the Windows users and groups who have permission to read a given file. Obviously Java has no built-in ability to read the Windows ACL information out, so I'm looking for other solutions. Are there any third party libraries available which can provide direct access to the ACL information for a Windows file? Failing that, maybe running cacls and capturing and then processing the output would be a reasonable temporary solution - Is the output format of cacls thoroughly documented anywhere, and is it likely to change between versions of Windows?

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