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  • Linq to NHibernate using Queryable.Where predicate

    - by Groo
    I am querying an SQLite database using LINQ to NHibernate. Person is an entity containing an Id and a Name: public class Person { public Guid Id { get; private set; } public string Name { get; private set; } } Let's say my db table contains a single person whose name is "John". This test works as expected: var query = from item in session.Linq<Person>() where (item.Name == "Mike") select item; // no such entity should exist Assert.IsFalse(query.Any()); but this one fails: var query = from item in session.Linq<Person>() select item; query.Where(item => item.Name == "Mike"); // following line actually returns the // "John" entry Assert.IsFalse(query.Any()); What am I missing?

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  • Is there a limit on the number of mutex objects that can be created in a Windows process?

    - by young-phillip
    I'm writing a c# application that can create a series of request messages. Each message could have a response, that needs to be waited on by a consumer. Where the number of outstanding request messages is constrained, I have used the windows EVENT to solve this problem. However, I know there is a limit on how many EVENT objects can be created in a single process, and in this instance, its possible I might exceed that limit. Does anyone know if there is a similar limit on creation of mutex objects or semaphores? I know this can be solved by some sort of pool of shared resources, that are grabbed by consumers when they need to wait, but it would be more convenient if each request message could have its own sync object.

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  • List of generic algorithms and data structures

    - by Jake Petroules
    As part of a library project, I want to include a plethora of generic algorithms and data structures. This includes algorithms for searching and sorting, data structures like linked lists and binary trees, path-finding algorithms like A*... the works. Basically, any generic algorithm or data structure you can think of that you think might be useful in such a library, please post or add it to the list. Thanks! (NOTE: Because there is no single right answer I've of course placed this in community wiki... and also, please don't suggest algorithms which are too specialized to be provided by a generic library) The List: Data structures AVL tree B-tree B*-tree B+-tree Binary tree Binary heap Binary search tree Linked lists Singly linked list Doubly linked list Stack Queue Sorting algorithms Binary tree sort Bubble sort Heapsort Insertion sort Merge sort Quicksort Selection sort Searching algorithms

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  • Multiblog engine for asp.net

    - by Andrey
    I know, different forms of this questions were asked on this site multiple times, but I haven't seen a single answer that would satisfy my need. I need a ASP.NET based blogging engine that wouul use SQL Server as a back end and allow multiple independet blogs in one app instance. I'm writing a community website for major bank and blogging is the piece I'm not sure about. Answers to other questions include a broad spectrum from BlogEngine.NET (doesn't support multiple blogs) to CommunityServer (a beast! blogging is just asmall piece of it). I don't want to install a full-blown CRM and just use blogging, I want a blogging engine. I don't mind to buy a commercial one but I can't find one. I'm pretty much stuck, and any ideas are highly appreciated!

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  • DocProject vs Sandcastle Help File Builder GUI

    - by Nathan
    I have several C# projects along with some internal library components that I'm trying to document together. Sandcastle seems to be the place to go to generate documentation from C#. I would like to know which of the two, DocProject or Sandcastle Help File Builder GUI is better and supports the features I need. I would like to compile only each projects own part of the document and then have it all integrated together in the end. (i.e. the library components in one documentation project and each project in it's own documentation project, then all of the above in a single root using the Help 2 viewer)

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  • CF - Mobile Managed Gestures

    - by no9
    Im looking for a nice demo/sample using Windows Mobile Managed Gestures. I have a main view that contains a single panel. Every item in the panel is another panel containing pictureBox and a label. I would like to implement scrooling (finger flicking) to avoid using thin scroolers. Are the Windows Mobile Managed Gestures the right solution to get this working, if so can some one provide me with a begginers demo? I downloaded the source code from http://code.msdn.microsoft.com/gestureswm/Release/ProjectReleases.aspx?ReleaseId=3438 but i would need a simple example using this source. Also a question ... does this work only on 6.5? Even if i got this working is there a way to support this in 6.0 ? thanx!

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  • Data mining logs to locate a bug

    - by gooli
    I'm working on a data distribution application which receives data from a source and distributes that data to multiple target application. After successfully distributing several messages each second for 8 days, it missed a single message and did not deliver it properly to the clients. As I was looking at the logs I tried to find something there that was special for the time the miss happend - either in the data, its rate or some other condition but couldn't find anything. Is there any data mining technique I can use to identify how that specific event differs from other events?

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  • Performance optimization for SQL Server: decrease stored procedures execution time or unload the ser

    - by tim
    We have a web service which provides search over hotels. There is a problem with performance: a single request to the service takes around 5000 ms. Almost all of the time is spent in database by executing storing procedures. During the request our server (mssql2008) consumes ~90% of the processor time. When 2 requests are made in parallel the average time grows and is around 7000 ms. When number of request is increasing, the average time of response is increasing as well. We have 20-30 requests per minute. Which kind of optimization is the best in this case having in mind that the goal is to provide stable response time for the service: 1) Try to decrease the stored procedures execution time 2) Try to find the way how to unload the server It is interesting to hear from people who deal with booking sites.

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  • Managing multiple WCF endpoints for the same service

    - by Jacob
    I am building an single application that uses WCF to call out to multiple external endpoints. All of the remote endpoints are identical except for the URI. I would like to treat them as a pool: add and remove endpoints through configuration and have the application understand what to do. My original plan was to define one endoint in the app.config, then iterate over my list of endpoints and update client.Endpoint.Address on the fly to point to the right place. Unfortunately, that property is read-only, rendering that plan unworkable. I'm a little bit stumped here. Any suggestions on how I might accomplish this?

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  • Unique keys for Sphinx along three vectors instead of two

    - by Brendon Muir
    I'm trying to implement thinking-sphinx across multiple 'sites' hosted under a single rails application. I'm working with the developer of thinking-sphinx to sort through the finer details and am making good progress, but I need help with a maths problem: Usually the formula for making a unique ID in a thinking-sphinx search index is to take the id, multiply it by the total number of models that are searchable, and add the number of the currently indexed model: id * total_models + current_model This works well, but now I also through an entity_id into the mix, so there are three vextors for making this ID unique. Could someone help me figure out the equation to gaurantee that the id's will never collide using these three variables: id, total_models, total_entities The entity ID is an integer. I thought of: id * (total_models + total_entities) + (current_model + current_entity) but that results in collisions. Any help would be greatly appreciated :)

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  • Wordpress podcasting with youtube video hosting

    - by Salim Fadhley
    I'm trying to build a site based on Wordpress for a client. Eventually it will be used to publish videos which could be hosted locally, but to reduce costs it would be nicer if we could host all our videos on somewhere like YouTube or Vimeo. I'm looking for a plugin or a way of hacking an existing plugin in order to achieve this. The idea is that when we list a new item on the site, users of iTunes / iPod and any other (more) standards compliant podcatcher should be able to view the video. Ideally I'd like to get away without writing a single line of code, but that may not be possible. The best solution for me is the one which requires the least amount of work!

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  • Create Out-Of-Process COM in C#/.Net ?

    - by Huck
    Hi, I need to create an out-of-process COM server (.exe) in C# that will be accessed by multiple other processes on the same box. The component has to be a single process because it will cache the information it provides to its consumers in memory. Note: the processes that will access my COM Server are mostly Matlab processes, thus the necessity for a COM interface. I have seen threads regarding creating in-process COM components in .Net on stack overflow (Create COM ...) and on the web, but am having a hard time to find a way to create out-of-process components with .Net. How is this achievable? Any suggested references? Thanks.

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  • Continuous Deployment with a C#/ASP.NET website?

    - by Amber Shah
    I have a website in C#/ASP.NET that is currently in development. When we are in production, I would like to do releases frequently over the course of the day, as we fix bugs and add features (like this: http://toni.org/2010/05/19/in-praise-of-continuous-deployment-the-wordpress-com-story/). If you upload a new version of the site or even change a single file, it kicks out the users that are currently logged in and makes them start over any forms and such. Is there a secret to being able to do deployments without interfering with users for .NET sites?

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  • Large Scale VHDL techniques

    - by oxinabox.ucc.asn.au
    I'm thinking about implimenting a 16 bit CPU in VHDL. A simplish CPU. ADD, MULS, NEG, BitShift, JUMP, Relitive Jump, BREQ, Relitive BREQ, i don't know somethign along these lines Probably all only working with 16bit operands. I might even cut it down and use only a single operand and a accumulator. With Some status regitsters, Carry, Zero, Neg (unless i use a Accumlator), I know how to design all the parts from logic gates, and plan to build them up from first priciples, So for my ALU I'll need to 'build' a ADDer, proably a Carry Look ahead, group adder, this adder it self is make up oa a couple of parts, wich are themselves made up of a couple of parts. Anyway, my problem is not the CPU design, or the VHDL (i know the language, more or less). It's how i should keep things organised. How should I use packages, How should I name my processes and port maps? (i've never seen the benifit of naming the port maps, or processes)

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  • R: Using sapply on vector of POSIXct

    - by Chris
    I have what may be a very simple question. I want to process a column of POSIXct objects from a dataframe and generate a vector of datetime strings. I tried to use the following sapply call dt <- sapply(df$datetime, function(x) format(x,"%Y-%m-%dT%H:%M:%S")) but to no avail. I keep getting the following error Error in prettyNum(.Internal(format(x, trim, digits, nsmall, width, 3L, : invalid 'trim' argument When I apply this function to a single POSIXct object from the column, I have no problem. So I'm stumped at the moment about what the problem is. Do I need to do something special with POSIXct objects?

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  • Random Number on SQL without using NewID()

    - by Angel Escobedo
    Hello I want to generate a Unique Random number with out using the follow statement : Convert(int, (CHECKSUM(NEWID()))*100000) AS [ITEM] Cause when I use joins clauses on "from" it generates double registers by using NEWID() Im using SQL Server 2000 *PD : When I use Rand() it probably repeat on probability 1 of 100000000 but this is so criticall so it have to be 0% of probability to repeat a random value generated My Query with NewID() and result on SELECT statement is duplicated (x2) My QUery without NewID() and using Rand() on SELECT statement is single (x1) but the probability of repeat the random value generated is uncertainly but exists! Thanks!

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  • Delete backup files older than 7 days

    - by rockbala
    Using osql command, SSQL backup of a database is created. It is saved to Disk. Then renamed to match the date of the day backup was taken. All these files are saved in a single folder all the time. for example: Batch1.bat does the following 1) Created backup.bak 2) renamed to backup 12-13-2009.bak (this is done by the combination of % ~ - etc to get the date parameter) This is now automated to take backup everyday by Task scheduler in Windows. Can the batch file also be modified to delete backup files older than 7 days? if so, how ? If it is not possible via batch file, other than manually deleting the files are there any other alternatives to automate the deleting job ? Thanks in advance, Balaji S

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  • How to organize code using an optional assembly reference?

    - by apoorv020
    I am working on a project and want to optionally use an assembly if available. This assembly is only available on WS 2008 R2, and my ideal product whould be a common binary for both computers with and without the assembly. However, I'm primarily developing on a Windows 7 machine, where I cannot install the assembly. How can I organize my code so that I can (with minimum changes) build my code on a machine without the assembly and secondly, how do I ensure that I call the assembly functions only when it is present. (NOTE : The only use of the optional assembly is to instantiate a class in the library and repeatedly call a (single) function of the class, which returns a boolean. The assembly is fsrmlib, which exposes advanced file system management operations on WS08R2.) I'm currently thinking of writing a wrapper class, which will always return true if the assembly is not present. Is this the right way to go about doing this?

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  • Algorithm - combine multiple lists, resulting in unique list and retaining order

    - by hitch
    I want to combine multiple lists of items into a single list, retaining the overall order requirements. i.e.: 1: A C E 2: D E 3: B A D result: B A C D E above, starting with list 1, we have ACE, we then know that D must come before E, and from list 3, we know that B must come before A, and D must come after B and A. If there are conflicting orderings, the first ordering should be used. i.e. 1: A C E 2: B D E 3: F D result: A C B D E F 3 conflicts with 2, therefore requirements for 2 will be used. If ordering requirements mean an item must come before or after another, it doesn't matter if it comes immediately before or after, or at the start or end of the list, as long as overall ordering is maintained. This is being developed using VB.Net, so a LINQy solution (or any .Net solution) would be nice - otherwise pointers for an approach would be good.

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  • How to solve the performance decay of a VB.NET 1.1 application?

    - by marco.ragogna
    I have single-thread windows form application written with VB.NET and targeting Framework 1.1. The software communicates with external boards through a serial interface, and it mainly consist of a state machine that run some tests, driven in a loop done with a Timer and an Interval of 50ms. The feedback on the user interface is done through some custom events raised during the tests. The problem that is driving me crazy is that the performance slightly decrease over time, and in particular after 1200/1300 test operations. The memory occupied does not increase over time, it is only the CPU that seems interested by this problem. The strange thing is that, targeting framework 2.0 and using the same identical code, I do not have this problem. I know that is difficult without looking at the code, but do you have suggestions how can I approach the problem?

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  • MPI4Py Scatter sendbuf Argument Type?

    - by Noel
    I'm having trouble with the Scatter function in the MPI4Py Python module. My assumption is that I should be able to pass it a single list for the sendbuffer. However, I'm getting a consistent error message when I do that, or indeed add the other two arguments, recvbuf and root: File "code/step3.py", line 682, in subbox_grid i = mpi_communicator.Scatter(station_range, station_data) File "Comm.pyx", line 427, in mpi4py.MPI.Comm.Scatter (src/ mpi4py_MPI.c:44993) File "message.pxi", line 321, in mpi4py.MPI._p_msg_cco.for_scatter (src/mpi4py_MPI.c:14497) File "message.pxi", line 232, in mpi4py.MPI._p_msg_cco.for_cco_send (src/mpi4py_MPI.c:13630) File "message.pxi", line 36, in mpi4py.MPI.message_simple (src/ mpi4py_MPI.c:11904) ValueError: message: expecting 2 or 3 items Here is the relevant code snipped, starting a few lines above 682 mentioned above. for station in stations #snip--do some stuff with station station_data = [] station_range = range(1,len(station)) mpi_communicator = MPI.COMM_WORLD i = mpi_communicator.Scatter(station_range, nsm) #snip--do some stuff with station[i] nsm = combine(avg, wt, dnew, nf1, nl1, wti[i], wtm, station[i].id) station_data = mpi_communicator.Gather(station_range, nsm) I've tried a number of combinations initializing station_range, but I must not be understanding the Scatter argument types properly. Does a Python/MPI guru have a clarification this?

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  • Any form autofill for 'Developers'?

    - by Majid
    Hi all, I have looked at some autofills for Firefox. But they are not designed with the developers' needs in mind. General internet surfers will need a tool to fill in many different forms with constant values for each form. Developers need exactly the opposite, when you want to test a part of your app you'll need to fill a single (or a couple of) forms many times with different (but valid and sensible) data. So, does such a thing exist? An autofill to fill form inputs based on perhaps a class name (email, password, address, url, ...)? I strongly feel if it doesn't exist someone should roll up their sleeves and make one! I for one will put in my share if some others want to team up. But right now, I am desperately in need of one if it exists

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  • Linq2Sql Best Practices

    - by this. __curious_geek
    I'm recently migrating to Linq2Sql and all my future projects will be using Linq2Sql. Having said that, I researched a lot on how to properly plug-in Linq2Sql in application design. what to put at what layer ? How do you design your repositories and business layer services ? Should I use DTOs over Linq2Sql entities on interaction layer ? what things should I be careful about ? what problems did you face ? I did not find any rock-solid material that really talked about one single thing and everyone have their own opinions. I'm looking forward to your ideas on how to integrate/use Linq2Sql in projects. My priority is maintenance[it should be maintenable and when multiple people work on same project] and scalabilty [it should have scope of evolution]. Thanks.

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  • What is the best way to add categories to posts - Ruby on Rails blog...

    - by bgadoci
    I am new to Ruby and Rails so bear with me please. I have created a very simple blog application with both posts and comments. Everything works great. My next question regarding adding categories. I am wondering the best way to do this. As I can't see too far in front of me yet when it comes to Rails I thought I would ask. To be clear, I would like that a single post can have multiple categories and a category can have multiple posts. Is the best way to do this to create a 'categories' table and then use the posts and categories models to do has_many :posts, has_many :categories? Would I also then set the routes.rb such that posts are embedded under categories? Or is there an easier way by simply adding a category column to the existing posts table? (in which case I would imagine having multiple categories would be difficult).

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  • How to send Ctrl/Shift/Alt + Key combinations to an application window? (via SendMessage)

    - by user1792042
    I can successfully send any single key message to an application, but don't know how to send combinations of keys (like Ctrl+F12, Shift+F1, Ctrl+R, etc..) Tired doing this that way: SendMessage(handle, WM_KEYDOWN, Keys.Control, 0); SendMessage(handle, WM_KEYDOWN, Keys.F12, 0); SendMessage(handle, WM_KEYUP, Keys.F12, 0); SendMessage(handle, WM_KEYUP, Keys.Control, 0); but this doen not seems to work.. (application act like only F12 is pressed, not Ctrl+F12).. Any ideas how to make this work?

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