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• Oracle on Mac OS X Snow Leopard

  - by Steve

  Hi, I am trying to install oracle on snow leopard using these guidelines. http://blog.rayapps.com/2009/09/14/how-to-install-oracle-database-10g-on-mac-os-x-snow-leopard/ There is a step in the installation, where I have to change netca and dbca such that it runs in 32 bit mode. Can someone please tell me how to do it. I have pasted the exact step below –Now you need to modify $ORACLE_HOME/jdk/bin/java script and change “…java -Xbootclasspath…” to “…java -d32 -Xbootclasspath…”--

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• Does anyone change the Visual Studio default bracing style in C# - Is there a standard?

  - by El Ronnoco

  I find the default bracing style a bit wasteful on line count eg... function foo() { if (...) { ... } else { ... } } would, if I was writing in JavaScript for example be written like... function foo() { if (...) { ... } else { ... } } ...which I understand may also not be to peoples' tastes. But the question(s) is/are do you turn off the VS formatting style and use your own rules? What is the opinion of this in the industry when many people are working on the same code-base? Is it better just to stick to the default just for simplicity/uniformity?

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• What CPAN module can summarize arbitrary error logs?

  - by mithaldu

  I'm maintaining some website code that will soon dump all its errors and warnings into a log file. In order to make this a bit more pro-active I plan to parse this log file daily, summarize the warnings and errors (i.e. count the occurrence of each specific one and group by either warning/error) and then email this to the devs on the project. This would likely admittedly be rather trivial with a hash and some further fiddling, I wondered if there is a suitable module on CPAN that I could use to do this task. It would either be one that summarizes specifically Perl error/warnings logs or one that summarizes arbitrary text files. Any suggestions?

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• PHP: Odd behaviour with date_sunset function

  - by Svish

  I'm having a look at the date_sunset function in PHP and have met an issue that I find a bit strange. I have this piece of code: $sunset = date_sunset(mktime(0, 0, 0, 5, 14, 2010), $format, // Format 55.596041, // Latitude 12.992495, // Longitude 90, // Zenith 2 // GMT Offset ); For the three different formats, that would give me: SUNFUNCS_RET_STRING 21:05 SUNFUNCS_RET_DOUBLE 21.095732016315 SUNFUNCS_RET_TIMESTAMP 1273863944 // H:i:s O -> 19:05:44 +0000 Why is the timestamp format ignoring the gmt offset? Is is supposed to be like that? If so what is the reason behind that?

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• C or Ada for engineering computations?

  - by yCalleecharan

  Hi,as an engineer I currently use C to write programs dealing with numerical methods. I like C as it's very fast. I don't want to move to C++ and I have been reading a bit about Ada which has some very good sides. I believe that much of the software in big industries have been or more correctly were written in Ada. I would like to know how C compares with Ada. Is Ada fast as C? I understand that no language is perfect but I would like to know if Ada was designed for scientific computing. Thanks a lot...

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• Usability standards when combining AJAX and regular POST-based form saves

  - by mcrider

  I'm working on a project where on certain pages (e.g. settings pages) we combine AJAX and regular fill-out-the-form-then-submit POST based operations. I'm curious if anyone has advice on improving the usability of such a page. One of my ideas is that when the user enters/modifies a value in a non-ajax part of the page, some sort of div would appear (say in a fashion similar to Growl) indicating that the user needs to save by pressing 'Submit' at the bottom of the page (and possibly putting up a modal dialog if the user navigates away from the page before saving, though that might be a bit too intrusive). I'm sure this type of interaction exists, but I can't find any examples.

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• jstring to L_TCHAR* format

  - by Ayusman

  Hi All, I have been trying to call a C function that has the following signature int changeFoo(L_TCHAR* pszFileSrc){....} in my JNI call my method looks like this: JNIEXPORT jint JNICALL Java_com_me_L_AFoo (JNIEnv * env, jclass jclass, jstring pSrc) { jint retValue = -100; retValue = changeFoo(pSrc); return retValue; } I get the following error in visual studio. Error 1 error C2664: 'L_FileConvert' : cannot convert parameter 1 from 'jstring' to 'L_TCHAR *' c:\Ayusman\Work\MyVCpp\LTExampleDll\LTExampleDll\LTExampleMain.cpp 46 LTExampleDll When I looked at the definition of L_TCHAR * here is what I got in the header files (in that sequence): typedef TCHAR L_TCHAR; typedef WCHAR TCHAR,*PTCHAR; typedef wchar_t WCHAR; //wc, 16 bit UNICODE char I work on java, this is a JNI application that I am trying to build. Can any body help as to how can I convert this properly? Thanks, Ayusman

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• SQLite doesn't have booleans or date-times...but C# does

  - by DanM

  I've been thinking about using SQLite for my next project, but I'm concerned that it seems to lack proper datetime and bit data types. If I use DbLinq (or some other ORM) to generate C# classes, will the data types of the properties be "dumbed down"? Will date-time data be placed in properties of type string or double? Will boolean data be placed in properties of type int? If yes, what are the implications? I'm envisioning a scenario where I need to write a whole second layer of classes with more specific data types and do a bunch of transformations and casts, but maybe it's not so bad. If you have any experience with this or a similar scenario, what are your "lessons learned"?

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• Need help getting Suspend to work in Ubuntu on laptop

  - by Aerik

  I've been doing a lot of research, but I've got to admit right out front that I'm not even sure exactly what is the right question. I've installed Kubuntu 10.4 on a Panasonic Toughbook CF-29. When I try to uses "suspend", the screen flickers, and then the hard drive light goes off but the power light stays on. I looked at the /var/log/pm-suspend.log, but I don't seen any errors... though I'm not sure what success should look like either. So I guess my real question is a bit more accurately stated as "How do I troubleshoot suspend not working in Kubuntu on a laptop?" Thanks, Aerik

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• Advanced Where Statements in Linq to Entity Framework

  - by JimJams

  Hi, I am wanting to create a Where statement within my Linq statement, but have hit a bit of a stumbling block. I would like to split a string value, and then search using each array item in the Where clause. In my normal Sql statement I would simply loop through the string array, and build up there Where clause then either pass this to a stored procedure, or just execute the sql string. But am not sure how to do this with Linq to Entity? ( From o In db.TableName Where o.Field LIKE Stringvalue Select o ).ToList() Hope you can help. Thanks in advance!

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• How do I change careers to become a programmer with little money

  - by bgc83

  I'm currently a network engineer, but find myself wanting to get into the world of development. I took a little bit of Java in college, am 27 years old and have been network engineering for 4 years now. I have a mortgage and student loans so going back to school would be difficult. I'm willing to put in however much hardwork is needed around my full time job to learn, but part of me feels I may need actuall schooling to get down some of the advanced concepts. Just looking for a little advice and direction. I have purchased a bunch of the Head First programming books and have begun reading through some of them as I figure out my way into this transition.

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• Table View rotate, but not properly (shape change)

  - by Pencrace

  Hello everyone, Here is the thing. I have a ViewController which contain a view in full window. And the program run in landscape mode. I want to put an UITableView over the full screen view but only on right half part of the screen. So I add a UITableView in my view controller, I used the Interface Builder in order to set the Table View in the upper half of the screen so It will be on the right part in LandscapeLeft mode. I searched for on a lot of forum how to rotate my Table View. And so it does... except, It get stuck on the upper half of the landscape mode, it should stick on the right half. I'm not a iPhone coder since long, so I'm a bit confused on how to solve this problem. Do you have any idea on how to resize or make the TableView rotate properly. Thanks,

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• How can I integrate a bitbucket repository with the hosted on-demand version of FogBugz?

  - by carrier

  I use the on-demand (hosted) version of FogBugz. I would like to start using Mercurial for source control. I would like to integrate FogBugz and a BitBucket repository. I gave it a bit of a try but things weren't going very well. FogBugz requires that you hook up your Mercurial client to a fogbugz.py python script. TortoiseHg doesn't seem to have the hgext directory that they refer to in instructions. So has anyone successfully done something similar?

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• How does sizeof calculate the size of structures

  - by Gearoid Murphy

  I know that a char and an int are calculated as being 8 bytes on 32 bit architectures due to alignment, but I recently came across a situation where a structure with 3 shorts was reported as being 6 bytes by the sizeof operator. Code is as follows: #include <iostream> using namespace std ; struct IntAndChar { int a ; unsigned char b ; }; struct ThreeShorts { unsigned short a ; unsigned short b ; unsigned short c ; }; int main() { cout<<sizeof(IntAndChar)<<endl; // outputs '8' cout<<sizeof(ThreeShorts)<<endl; // outputs '6', I expected this to be '8' return 0 ; } Compiler : g++ (Debian 4.3.2-1.1) 4.3.2. This really puzzles me, why isn't alignment enforced for the structure containing 3 shorts?

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• Objective-C "if" statements not retaining

  - by seanny94

  I know the title of this question is a bit confusing, but here it goes anyway: I'm creating an NSString after an if statement but it just doesn't seem to want to retain outside of the statement. My conditional looks like this: if ([[password stringValue] isEqualToString:@""]) { NSString *pwd = [[NSString alloc]initWithString:@"password"]; } else { NSString *pwd = [[NSString alloc]initWithFormat:@"%@", [password stringValue]]; } ... and I call pwd later in the script like this: NSArray *arguments; arguments = [NSArray arrayWithObjects: ip, pwd, nil]; [task setArguments: arguments]; But when I do so in this way, the first snippet returns a warning of Unused variable 'pwd' and the latter call ends up in an error of 'pwd' undeclared. What am I doing wrong here? Thanks in advance. ;)

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• Ruby on Rails - where to write business logic while processing a request? (newbie)

  - by Genadinik

  I am learning Ruby on Rails. I made a simple link like this: <%= link_to "Alex Link", alexes_path(@alex) %> then I routed it in routes.rb like this: resources :alexes get "home/index" then I am a bit unclear, but I think it goes to this part of the controller: def index #@alexes = Alex.all respond_to do |format| format.html # index.html.erb format.json { render json: @alexes } end end Am I correct that it goes to this part of the controller? Then nothing much happens and it goes to the next page which is index.html.rb under views\alexes So what I am wondering is - if I needed to do some business logic, would I write that in the controller snippet? Where inside the snippet? An example would be nice to take a look. Also, I would like to connect to a MongoDb database. Would I also write that in the middle of the controller? Thanks!

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• Are there any purely functional Schemes or Lisps?

  - by nickname

  Over the past few months, I've put a lot of effort into learning (or attempting to learn) several functional programming languages. I really like math, so they have been very natural for me to use. Simply to be more specific, I have tried Common Lisp, Scheme, Haskell, OCaml, and (a little bit of) Erlang. I did not like the syntax of OCaml and do not have enough Erlang knowledge to make a judgment on it yet. Because of its consistent and beautiful (non-)syntax, I really like Scheme. However, I really do appreciate the stateless nature of purely functional programming languages such as Haskell. Haskell looks very interesting, but the amount of inconsistent and non-extendable syntax really bothered me. In the interest of preventing a Lisp vs Haskell flame war, just pretend that I can't use Haskell for some other reason. Therefore, my question is: Are there any purely functional Schemes (or Lisps in general)?

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• Unit testing UDP socket handling code

  - by JustJeff

  Are there any 'good' ways to cause a thread waiting on a recvfrom() call to become unblocked and return with an error? The motivation for this is to write unit tests for a system which includes a unit that reads UDP datagrams. One of the branches handles errors on the recvfrom call itself. The code isn't required to distinguish between different types of errors, it just has to set a flag. I've thought of closing the socket from another thread, or do a shutdown on it, to cause recvfrom to return with an error, but this seems a bit heavy handed. I've seen mention elsewhere that sending an over-sized packet would do it, and so set up an experiment where a 16K buffer was sent to a recvfrom waiting for just 4K, but that didn't result in an error. The recvfrom just return 4096, to indicate it had gotten that many bytes.

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• Error Using PDCurses: Cannot Open File Libc.C

  - by cam

  I'm getting the error: 1>LINK : fatal error LNK1104: cannot open file 'LIBC.lib' Here's my source code: #include <curses.h> int main() { initscr(); /* Start curses mode */ printw("Hello World !!!"); /* Print Hello World */ refresh(); /* Print it on to the real screen */ getch(); /* Wait for user input */ endwin(); /* End curses mode */ return 0; } I've configured the PDcurses library properly (added to Additional Include libraries, added folder to Additional Library Directories). I've looked around for a bit, and I've tried adding Libc.C to the 'Ignore Library' list, which in turn causes about 150 errors. Not sure what to do from here.

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• .NET Application using a native DLL (build management)

  - by moogs

  I have a .NET app that is dependent on a native DLL. I have the .NET app set as AnyCPU. In the post-build step, I plan to copy the correct native DLL from some directory (x86 or AMD64) and place it in the target path. However, this doesn't work. On a 64-bit machine, the environment variable PROCESSOR_ARCHITECTURE is "x86" in Visual Studio. My alternative right now is to create a small tool that outputs the processor architecture. This will be used by the post-build step. Is there a better alternative? (Side Note: when deploying/packaging the app, the right native DLL is copied to the right platform. But this means we have two separate release folders for x86 and AMD64, which is OK since this is for a device driver. The app is a utility tool for the driver).

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• C# "Could not find a part of the path" - Creating Local File

  - by Pyronaut

  I am trying to write to a folder that is located on my C:\ drive. I keep getting the error of : Could not find a part of the path .. etc My filepath looks basically like this : C:\WebRoot\ManagedFiles\folder\thumbs\5c27a312-343e-4bdf-b294-0d599330c42d\Image\lighthouse.jpg And I am writing to it like so : using (MemoryStream memoryStream = new MemoryStream()) { thumbImage.Save(memoryStream, ImageFormat.Jpeg); using (FileStream diskCacheStream = new FileStream(cachePath, FileMode.CreateNew)) { memoryStream.WriteTo(diskCacheStream); } memoryStream.WriteTo(context.Response.OutputStream); } Don't worry too much about the memory stream. It is just outputting it (After I save it). Since I am creating a file, I am a bit perplexed as to why it cannot find the file (Shouldn't it just write to where I tell it to, regardless?). The strange thing is, It has no issue when I'm testing it above using File.Exists. Obviously that is returning false, But it means that atleast my Filepath is semi legit. Any help is much appreciated.

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• Windows API calls from assembly while minimizing program size

  - by takteek

  I'm trying to write a program in assembly and make the resulting executable as small as possible. Some of what I'm doing requires windows API calls to functions such as WriteProcessMemory. I've had some success with calling these functions, but after compiling and linking, my program comes out in the range of 14-15 KB. (From a source of less than 1 KB) I was hoping for much, much less than that. I'm very new to doing low level things like this so I don't really know what would need to be done to make the program smaller. I understand that the exe format itself takes up quite a bit of space. Can anything be done to minimize that? I should mention that I'm using NASM and GCC but I can easily change if that would help.

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• 'script/console test' with spork and rspec not loading the whole environment?

  - by TheDeeno

  I'm trying to load up console to interact with some of my rspec mocking helpers. I expected that running script/console test would load an env similar to when I run spec. However, this doesn't appear to be the case. It looks like spec_helper is never loaded. Or, if it is, it's not actually running through the logic because spork has polluted it a bit. In short, is there a quick and easy way to get an interactive rspec party going?

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• 'Array of arrays' in matlab?

  - by waitinforatrain

  Hey, having a wee bit of trouble. Trying to assign a variable length 1d array to different values of an array, e.g. a(1) = [1, 0.13,0.52,0.3]; a(2) = [1, 0, .268]; However, I get the error: ??? In an assignment A(I) = B, the number of elements in B and I must be the same. Error in ==> lab2 at 15 a(1) = [1, 0.13,0.52,0.3]; I presume this means that it's expecting a scalar value instead of an array. Does anybody know how to assign the array to this value? I'd rather not define it directly as a 2d array as it is for are doing solutions to different problems in a loop Edit: Got it! a(1,1:4) = [1, 0.13,0.52,0.3]; a(2,1:3) = [1, 0, .268];

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• Password reset by email without a database table

  - by jpatokal

  The normal flow for resetting a user's password by mail is this: Generate a random string and store it in a database table Email string to user User clicks on link containing string String is validated against database; if it matches, user's pw is reset However, maintaining a table and expiring old strings etc seems like a bit of an unnecessary hassle. Are there any obvious flaws in this alternative approach? Generate a MD5 hash of the user's existing password Email hash string to user User clicks on link containing string String is validated by hashing existing pw again; if it matches, user's pw is reset Note that the user's password is already stored in a hashed and salted form, and I'm just hashing it once more to get a unique but repeatable string. And yes, there is one obvious "flaw": the reset link thus generated will not expire until the user changes their password (clicks the link). I don't really see why this would be a problem though -- if the mailbox is compromised, the user is screwed anyway.

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