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• Implementation of a distance matrix of a binary tree that is given in the adjacency-list representation

  - by Denise Giubilei

  Given this problem I need an O(n²) implementation of this algorithm: "Let v be an arbitrary leaf in a binary tree T, and w be the only vertex connected to v. If we remove v, we are left with a smaller tree T'. The distance between v and any vertex u in T' is 1 plus the distance between w and u." This is a problem and solution of a Manber's exercise (Exercise 5.12 from U. Manber, Algorithms: A Creative Approach, Addison-Wesley (1989).). The thing is that I can't deal properly with the adjacency-list representation so that the implementation of this algorithm results in a real O(n²) complexity. Any ideas of how the implementation should be? Thanks.

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• Curious: Could LLVM be used for Infocom z-machine code, and if so how? (in general)

  - by jonhendry2

  Forgive me if this is a silly question, but I'm wondering if/how LLVM could be used to obtain a higher performance Z-Machine VM for interactive fiction. (If it could be used, I'm just looking for some high-level ideas or suggestions, not a detailed solution.) It might seem odd to desire higher performance for a circa-1978 technology, but apparently Z-Machine games produced by the modern Inform 7 IDE can have performance issues due to the huge number of rules that need to be evaluated with each turn. Thanks! FYI: The Z-machine architecture was reverse-engineered by Graham Nelson and is documented at http://www.inform-fiction.org/zmachine/standards/z1point0/overview.html

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• How to create a formatted localized string?

  - by mystify

  I have a localized string which needs to take a few variables. However, in localization it is important that the order of the variables can change from language to language. So this is not a good idea: NSString *text = NSLocalizedString(@"My birthday is at %@ %@ in %@", nil); In some languages some words come before others, while in others it's reverse. I lack of an good example at the moment. How would I provide NAMED variables in a formatted string? Is there any way to do it without some heavy self-made string replacements? Even some numbered variables like {%@1}, {%@2}, and so on would be sufficient... is there a solution?

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• JAXWS serves only 100 requests, how to configure JAXWS to change it to unlimited?

  - by cbz

  Hello, I'm using JAXWS for generating webservices and serving using EndPoint.publish() as well as deploying war file, but as soon as it has served 100 requests it wouldn't return 101st response. How to configure JAXWS to change this count to unlimited? EDIT: solution found, first of all it was not related to JAXWS and I'm sorry for posting it here, in my first impression I thought problem is with JAXWS but after deep exploring and debugging I found problem with my persistence layer (Hibernate) where max number of sessions allowed are 100 by default. Sorry again for making you guys to think which actually does not make sense.

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• Trouble dragging and dropping gui components onto other .net forms using NHibernate

  - by IsaacB

  Hi, using VS2008, here. I have a GUI component that loads some stuff from a database mapped by nhibernate in its constructor. When I drag and drop this component onto another form from the toolbox, NHibernate complains that it can't find the config file in program files\visual studio 9\common7\ide. Why is it looking here for the cfg file? I'm actually calling database stuff through another project in the same solution, and the cfg file is located at the root of that project. copy/pasting the cfg file over to there does work, but I'm working with svn here and I don't want to have configuration files outside the repository. Something else that would help would be turning off how it tries to load the data in the form design screen. How would I do that?

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• Issues with Firefox 3.6 & SWFObject 2.2

  - by Wopdoowop

  I've searched the net for a solution but still haven't found one yet. I'm on Mac OSX and I use FlashBuilder. I try to publish a movie with the values of 100% for the width & the height. These are the values I use both in SWFObject and the CSS. Flash doesn't display in Firefox but displays on Opera, Chrome & Safari. SWFObject test suite displays fine though! I've tried to replicate the test suite settings but it doesn't work :( The only way I can get the movie to display in Firefox is by setting the height value to a fixed pixel size in the flash content div, which defeats the purpose of using percentage values in the first place :) I've tried most recommendations such as putting the script in the head tag as well as a few others but nothing works except setting a fixed height size in the CSS. Help would be most appreciated! ;)

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• C++'s char * by swig got problem in Python 3.0

  - by gpliu3

  Our C++ lib works fine with Python2.4 using Swig, returning a C++ char* back to a python str. But this solution hit problem in Python3.0, error is: Exception=(, UnicodeDecodeError('utf8', b"\xb6\x9d\xa.....",0, 1, 'unexpected code byte') Our definition is like(working fine in Python 2.4): void cGetPubModulus( void* pSslRsa, char* cMod, int* nLen ); %include "cstring.i" %cstring_output_withsize( char* cMod, int* nLen ); Suspect swig is doing a Bytes-Str conversion automatically. In python2.4 it can be implicit but in Python3.0 it's no long allowed.. Anyone got a good idea? thanks

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• How to build a SQL statement when any combination of user input to the table is possible?

  - by Greg McNulty

  Example: the user fills in everything but the product name. I need to search on what is supplied, so in this case everything but productName= This example could be for any combination of input. Is there a way to do this? Thanks. $name = $_POST['n']; $cat = $_POST['c']; $price = $_POST['p']; if( !($name) ) { $name = some character to select all? } $sql = "SELECT * FROM products WHERE productCategory='$cat' and productName='$name' and productPrice='$price' "; EDIT Solution does not have to protect from attacks. Specifically looking at the dynamic part of it.

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• The shortest way to convert infix expressions to postfix (RPN) in C

  - by kuszi

  Original formulation is given here (you can try also your program for correctness) . Additional rules: 1. The program should read from standard input and write do standard output. 2. The program should return zero to the calling system/program. 3. The program should compile and run with gcc -O2 -lm -s -fomit-frame-pointer. The challenge has some history: the call for short implementations has been announced at the Polish programming contest blog in September 2009. After the contest, the shortest code was 81 chars long. Later on the second call has been made for even shorter code and after the year matix2267 published his solution in 78 bytes: main(c){read(0,&c,1)?c-41&&main(c-40&&(c%96<27||main(c),putchar(c))):exit(0);} Anyone to make it even shorter or prove this is impossible?

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• Center an Image vertically and horizontally? css

  - by acidzombie24

  How do i vertically and horizontally center an image when i do not know the size of it? I asked this question and someone suggested using a table. This isnt the first time i heard a table can do it but i tried without luck. Searching SO only got me results when i do know the size of the image. How do i do this with a table? NOTE: Javascript/jquery is not preferred but if theres a solution with it i'll be open to it.

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• Process every pair in a sequence

  - by Henry Jackson

  I'm looking for a concise way to process every (unordered) pair of elements in a sequence in .NET. I know I can do it with nested foreach loops, but I was looking for something a little more readable. I was imagining something like a modified Any() extension method: IEnumerable<Transaction> transactions = ... if (transactions.AnyPair( (first, second) => first.UniqueID == second.UniqueID)) throw ... Or maybe a foreach-style one: IEnumerable<JigsawPiece> pieces = ... pieces.ForEachPair( (first, second) => { TryFit(first, second); }); This question has been asked for other languages (e.g. see http://stackoverflow.com/questions/942543/operation-on-every-pair-of-element-in-a-list), but I'm looking for a .NET solution.

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• MS Access CrossTab query - across 3 tables

  - by Prembo

  Hi, I have the following 3 tables: 1) Sweetness Table FruitIndex CountryIndex Sweetness 1 1 10 1 2 20 1 3 400 2 1 50 2 2 123 2 3 1 3 1 49 3 2 40 3 3 2 2) Fruit Name Table FruitIndex FruitName 1 Apple 2 Orange 3 Peaches 3) Country Name Table CountryIndex CountryName 1 UnitedStates 2 Canada 3 Mexico I'm trying to perform a CrossTab SQL query to end up with: Fruit\Country UnitedStates Canada Mexico Apple 10 20 400 Orange 50 123 1 Peaches 49 40 2 The challenging part is to label the rows/columns with the relevant names from the Name tables. I can use MS Access to design 2 queries, create the joins the fruit/country names table with the Sweetness table perform crosstab query However I'm having trouble doing this in a single query. I've attempted nesting the 1st query's SQL into the 2nd, but it doesn't seem to work. Unfortunately, my solution needs to be be wholly SQL, as it is an embedded SQL query (cannot rely on query designer in MS Access, etc.). Any help greatly appreciated. Prembo.

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• C# Windows CE 5.0 error: Can't find entry point ExitWindowsEx in PInvoke DLL coredll

  - by JackN

  I need to programatically shutdown a Windows CE 5.0 tablet using Microsoft.NET SDK CompactFramework v2.0. I tried using the solution here but got the error message Can't find entry point ExitWindowsEx in PInvoke DLL coredll Is there a way to add ExitWindowsEx to my build? Do I need a different coredll? [Flags] public enum ExitFlags { Reboot = 0x02, PowerOff = 0x08 } [DllImport("coredll")] public static extern int ExitWindowsEx(ExitFlags flags, int reserved); private static void buttonShutdown_Click(object sender, EventArgs e) { ExitWindowsEx(ExitFlags.PowerOff, 0); } private static void buttonRestart_Click(object sender, EventArgs e) { ExitWindowsEx(ExitFlags.Reboot, 0); }

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• Eclipse, Android ndk, source files, and library project dependencies

  - by Android Noob

  In Microsoft Visual Studio 2010, it is possible to create a Solution with multiple projects and set dependencies between projects. I'm trying to figure out if the same thing can be done using Eclipse via the NDK. More specifically, I want to know if it is possible to create C source files in an ordinary Android project that can reference C header files in an Android library project. For example: Android library project: Sockets Ordinary Android project: Socket_Server Sockets contains all the C header/source files that are needed to do socket I/O. Socket_Server contains test code that makes calls to the functions that are defined in Sockets library project. This test code requires a header file that contains the function declaration of all API calls. I already set the library dependencies between the projects via: Properties > Android > Library > Add

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• No resource found when using style Theme.Sherlock

  - by Vitaly Menchikovsky

  I am trying to use Sherlock. The steps That I did bring up the library of abc to my project while my project min sdk 2.2 and max api 15. the problem that I cant set up the style to use it. the error Error retrieving parent for item: No resource found that matches the given name '@style/ Theme.Sherlock'. my code of xml: <resources> <style name="AppTheme" parent="@style/Theme.Sherlock" /> </resources> the java that I use is 1.6. I am runing 4.0.3 avd. I know that you will give me a link for webs but didnt find any thing that can help. I am using eclipse and Sherlock 4.0.3.If you can give me the solution how to do it simple way with instructions. thanks.

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• Oracle (PL/SQL): Is UPDATE RETURNING concurrent?

  - by Jaap

  I'm using table with a counter to ensure unique id's on a child element. I know it is usually better to use a sequence, but I can't use it because I have a lot of counters (a customer can create a couple of buckets and each of them needs to have their own counter, they have to start with 1 (it's a requirement, my customer needs "human readable" keys). I'm creating records (let's call them items) that have a prikey (bucket_id, num = counter). I need to guarantee that the bucket_id / num combination is unique (so using a sequence as prikey won't fix my problem). The creation of rows doesn't happen in pl/sql, so I need to claim the number (btw: it's not against the requirements to have gaps). My solution was: UPDATE bucket SET counter = counter + 1 WHERE id = param_id RETURNING counter INTO num_forprikey; PL/SQL returns var_num_forprikey so the item record can be created. Question: Will I always get unique num_forprikey even if the user concurrently asks for new items in a bucket?

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• How to make django test framework read from live database?

  - by lfborjas

  I realize there's a similar question here, but this one has a different approach: I have a django app that does queries over data indexed with djapian ; I'd like to write unit tests for this app's search component, and, obviously, I'd need the django settings module and all connections with the database active, so the test runner that django provides seems ideal. however, the django testing framework creates a dummy database and I'd hate to dump all my data to a fixture and then index it (the tests would take forever!); My data isn't at risk because the tests would only read from the database, so, how could this be achieved? -I'm new at this whole unit testing thing, so the solution of writing a new test runner I read in that similar question doesn't enlighten me a bit, at least not without some details

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• POST data disapearing on large file upload

  - by DfKimera

  I'm having issues with a file uploading utility in my PHP application. When sending large files (9MB+) over the form, I get a very odd behaviour: the POST data I've included in the form dissapears, including the file information. I've already increased all PHP limits I could (time limit, max input time, post max size, memory limit and upload max filesize) and I still can't get the proper behaviour. I've tried replacing the regular HTTP forms with a Flash-based solution (SWFUpload, www.swfupload.org), still the same behaviour. I've tried multiple files of similar sizes and its definitely not a particular file issue. I've debugged the POST vars sent using Firebug, and the correct variables are still there in the header, together with the file. What could be going on here?

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• Source control Branching needs

  - by Mükremin

  Hello, we are creating hospital information system software. The project will be different hospital to hospital and contain different use cases. But lots of parts will be the same. So we will use branching mechanism of the source control. If we find a bug in one hospital, how can we know the other branches have the same bug or not. Resim The numbers in the picture which we attached show the each hospital software. Do you have a solution about this problem ? Which source control(SVN,Git,Hg) we will be suitable about this problem ? Thank you.!

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• Delphi Search files and directories fastest alghorithm

  - by radu-barbu

  Hi, I'm using Delphi7 and i need a solution to a big problem.Can someone provide me a faster way for searching through files and folders than using findnext and findfirst? because i also process the data for each file/folder (creation date/author/size/etc) and it takes a lot of time...I've searched a lot under WinApi but probably I haven't see the best function in order to accomplish this. All the examples which I've found made in Delphi are using findfirst and findnext... Also, I don't want to buy components or use some free ones... Thanks in advance!

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• How to configure a OCUnit test bundle for a framework?

  - by GuidoMB

  I've been developing a Mac OS X framework and I want to use OCUnit in my XCode 3.2.1 project. I've followed several tutorials on how to configure a OCUnit test bundle. The problem is that when I create a test case that uses a function that is defined in one of the framework's sources, I get a building error telling me that the symbol is not found. I made the test bundle dependent of my project's target as the tutorial said, but that doesn't seem to be problem. First I thought that I could solve this problem by dragging the framework's source files into the compile sources section within the Test bundle target, but then all the symbols referenced from that source file started to show up in the build errors, so that seems to not be a good solution/idea. How can I configure my unit test bundle so it builds properly?

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• datagrid column issue with MouseEnter events

  - by prince23

  hi, i have 3 data grid placed working fine with expand and collapse. now i have an requirement where i have an grid with four columns starting from name age mailId address once user moves mouse over the *name column only. i need to call the MouseEnter Event* here i am showing an pop grid whereas when i move mouse over the other columns like i need call the MouseLeave Event here i need to hide the pop grid right now once user click on the row on any column values i am showing an pop up grid with all the details of that row. here i am using Selection Changed Event is there any way i can achieve this functionality like on move mouse over only the first column need to display the data and call the mouse events thanks in advance looking for an help. i am at few steps away from the solution let me know how to solve it. prince

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• Drupal 6 sign-up booking, reservation system with payments

  - by Lukasz

  Hi Guys. I have tried to find out the working solution for implementing simple events booking system in Drupal 6 (limited places, payment, signing up/buying few places for firends). System does not have to be big but easy to customize events to reserve/book places for. I was surprised of not finding much complete solutions. Most of the time I was directed to use modules like: Date, Calendar, Singup, Singup Ubercraft integration, Ubercraft. Does anybody of you has tested it? Is it working and customizable or you would suggest other alternatives on the subject? Wiil appreciate any recomendations.

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• User Interface Diagram That is always reachable

  - by Fosa

  If you have to build a flow of a Use-case by drawing each Interface Diagram. Then you would start with a Diagram like say "login". But after the login page, no mather wich page you choose except the "logout" page, you always have your navigation bar right ? So all the options in the navigation bar? Like account page , personal page, etc... Do you have to make sure in your flow that in every diagram there is acces to the "accountpage" diagram ? Or do they have an other solution for that ? Thanx in advance

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• php + upload.class + not overwriting the image

  - by Paulo

  Hi, i am trying to upload a file with upload.class and i need to overwrite the file when the user upload a new one. But instead of overwriting, he is putting photo_01, photo_02, etc... The code: $foto = new Upload($_FILES['photo']); $fotot = new Upload($_FILES['photo']); $fotot->image_resize = true; $fotot->image_y = 110; $fotot->image_x = 110; $foto->file_new_name_body = "photo"; $fotot->file_new_name_body = "photo"; $foto->file_ovewrite = true; $fotot->file_ovewrite = true; $fotot->Process("{$dir_fotos}thumbs/"); $foto->Process("{$dir_fotos}"); Somebody has already passed by this or has a solution??? notice that i'm using file_ovewrite = true; thanks

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