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• Physical storage of data in Access 2007

  - by ste

  I've been trying to estimate the size of an Access table with a certain number of records. It has 4 Longs (4 bytes each), and a Currency (8 bytes). In theory: 1 Record = 24 bytes, 500,000 = ~11.5MB However, the accdb file (even after compacting) increases by almost 30MB (~61 bytes per record). A few extra bytes for padding wouldn't be so bad, but 2.5X seems a bit excessive - even for Microsoft bloat. What's with the discrepancy? The four longs are compound keys, would that matter?

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• Why is Harvest being purchased at all?

  - by Mike Caron

  Does your work environment use Harvest SCM? I've used this now at two different locations and find it appalling. In one situation I wrote a conversion script so I could use CVS locally and then daily import changes to the Harvest system while I was sleeping. The corp was fanatic about using Harvest, despite 80% of the programmers crying for something different. It was needlessly complicated, slow and heavy. It is now a job requirement for me that Harvest is not in use where I work. Has anyone else used Harvest before? What's your experience? As bad as mine? Did you employ other, different workarounds? Why is this product still purchased today?

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• Parent-child table layout

  - by cyberzed

  I'm currently planning a piece of software for dogbreeders and I'm in doubt about my datadesign...whether I'm doing something smart or stupid :) The plan at the moment is one holistic "dog" table sorta like this... Id | Name | FatherId | MotherId ------------------------------- 1 | A | 0 | 0 2 | B | 1 | 0 3 | C | 0 | 0 4 | D | 0 | 3 5 | E | 1 | 3 6 | F | 5 | 2 7 | G | 4 | 3 My questions is, is it common to make it like this or is it really sloppy. I can see a quick lookup reason to have it but I'm really in doubt whether it's good or bad in the end. I thinking it would be better designed if I had a rel-table on the side with Id coupling, but I'm really in doubt how well any of the cases are. A side note is that it'll only be me personally looking at the data this way (or someone adopting the project from me)

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• Should I be using libraries if I'm trying to learn how to program?

  - by CodeJustin.com

  I have been programming "a lot" in the past few months and at first I was trying to find the "easyest" language. Fortunately I realized that it's not about the language, it's about learning HOW to code. I ran into the Stanford lectures online (programming methodology) and I watched them all (around 23 hours total) awhile ago. Then I got into Java ME and programmed about 28.47% of a mobile RPG game (only around 2k lines of code). I feel like I learned a lot from those two experiences compared to previous ones but now that I'm moving into flash/actionscript 3.0 development and I'm finding myself learning like I did when I first started with PHP. I'm not really getting whats under the hood kind of. I'm finding myself using libraries to speed up development time which doesn't seem like a bad thing BUT I personally do not know how to write the libraries myself off hand. So should I be coding everything myself or is it ok to use libraries when you don't even know how to code them?

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• Localhost disable

  - by user1766361

  I need to install an script and i go to install window and type in host: localhost and in other fields dbname and dbusername... but when i click to install button then redirect me to my localhost http: // localhost:8283 WHY DOING tHAT? How i can solve that problem? Is there any way to solve that localhost problem? Is my browser settings bad? also i have installed Wamp server on my pc What I need to do now? aplikation want to redirect to localhost not to serverhost

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• How to yield a single element from for loop in scala?

  - by Julio Faerman

  Much like this question: Functional code for looping with early exit Say the code is def findFirst[T](objects: List[T]):T = { for (obj <- objects) { if (expensiveFunc(obj) != null) return /*???*/ Some(obj) } None } How to yield a single element from a for loop like this in scala? I do not want to use find, as proposed in the original question, i am curious about if and how it could be implemented using the for loop. * UPDATE * First, thanks for all the comments, but i guess i was not clear in the question. I am shooting for something like this: val seven = for { x <- 1 to 10 if x == 7 } return x And that does not compile. The two errors are: - return outside method definition - method main has return statement; needs result type I know find() would be better in this case, i am just learning and exploring the language. And in a more complex case with several iterators, i think finding with for can actually be usefull. Thanks commenters, i'll start a bounty to make up for the bad posing of the question :)

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• Why i get this following error when using dir in Matlab?

  - by nata

  Matlab keep give me following error message : ??? Error using == dir Argument must contain a string. Error in == Awal at 15 x = dir(subDirs) Below is my codes : %MY PROGRAM clear all; clc; close all; %-----Create Database----- TrainDB = uigetdir('','Select Database Directory'); TrainFiles = dir(TrainDB); dirIndex = [TrainFiles.isdir]; [s subDirNumber] = size(dirIndex); for i = 3:subDirNumber subDirs = {TrainFiles(i).name}; subDirs = strcat(TrainDB,'\',subDirs); x = dir(subDirs) %<-------Error Here end Is something wrong with the codes? Your help will be appreciated. I'm sorry for my bad English.

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• How to deal with multiple screensizes + dynamic controls in Android?

  - by chobo2

  Hi I am learning how to program on Android phone. However I am unsure how to make my application work for the different screen sizes and resolutions. I read the tutorial on the android site and still unsure how to do it. First I know there are different files so could make a layout for each of the sizes but my problem is most of the screen needs to be dynamically created so there would not be much to put in these files. So I am not sure how to android to re size dynamic controls based on the screen size. I have also read it is bad practice to make controls in anything but the xml file as it separates view logic and programming logic. However they never talk about if you need to make these controls dynamically what you should do. So is there some other way to do it that is considered good practice?

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• What is an alternative to eval in this situation?

  - by CppLearner

  Many of my view functions do similar things. For the most part, they reverse to a different views upon clicking a button / a text link. So I wrote a helper function render_reverse def render_reverse(f, args): # args are all string type return eval('reverse(' + f + ', ' + args + ')' ) eval is a bad practice, and is pretty slow. It takes 3 seconds to start redirecting, whereas calling reverse directly takes less than 1 second to start redirecting. What alternative do I have? By the way, the function above doesn't work properly. I was modelling after this line (which works) eval('reverse("homepage", args=["abcdefg"])') Thanks.

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• Display popup window for a CD.

  - by SLC

  Got a CD with a bunch of tutorials etc. done in HTML. What I want is to have a browser window open with no toolbars, fixed width/height etc. because the content is designed to fit nicely into such a window. You can do this with window.open and put a bunch of parameters in, but this triggers popup blockers and activex warnings. Also it looks kinda bad, as the original window doesn't close without a hack that also generates problems. Is there a nice way I can achieve this effect? I could perhaps compile an .exe to autorun on the CD to launch this, but I wouldn't know how to get an .exe to open a window with toolbars etc. turned off.

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• How to check an exectuable's path is correct in PHP?

  - by nickf

  I'm writing a setup/installer script for my application, basically just a nice front end to the configuration file. One of the configuration variables is the executable path for mysql. After the user has typed it in (for example: /path/to/mysql-5.0/bin/mysql or just mysql if it is in their system PATH), I want to verify that it is correct. My initial reaction would be to try running it with "--version" to see what comes back. However, I quickly realised this would lead to me writing this line of code: shell_exec($somethingAUserHasEntered . " --version"); ...which is obviously a Very Bad Thing. Now, this is a setup script which is designed for trusted users only, and ones which probably already have relatively high level access to the system, but still I don't think the above solution is something I want to write. Is there a better way to verify the executable path? Perhaps one which doesn't expose a massive security hole?

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• XCode Project Code Changes Not Updating 100% After Save-Build-Run

  - by Greg

  When I make code changes to my iPhone game project in XCode, and then do CMD-B + Enter, I expect the project to be saved, build and run on the simulator with the latest. What is happening though, sometimes, is that it doesn't pick up a small change I make unless I clean the project and then build. I'm a long time Java person and newish to C-based languages and it's compiler. Can someone explain to me what is cached after each build that does this and how to change my project settings to avoid having to clean everytime? Or tell me the bad news that this is part of C development? Not trying to bash it - I get compiled JSPs stuck in the working cache often in Java, too. :P

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• Loading external content with jquery or iframe?

  - by nailuenlue

  Hiho, There's an existing website that i need to include into another site which goes like this: a.mysite.com and i need to fetch content from this site in my www.mysite.com website... As i need to access the content of the iframe the Same origin policy produces a problem here. What i did was to configure mod_proxy on Apache to proxy pass all requests from www.mysite.com/a to a.mysite.com This will work fine...but my problem is that im not sure what the best way would be to include those pages. 1. Idea As the content of the iframe is a full featured site with a top navigation...left navigation etc....i would need to change the page template to only show the content box to be able to integrate that page in the iframe. 2. Idea I could just load the DIV where the content lies through JQuery.load() and integrate it into my site. What is the best way to accomplish such a task? How bad is both ideas from the SEO point of view?

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• PHP / XHTML. Should I place everything in echo tags?

  - by 110175914651386975417

  A quick question involving PHP development, I seem to be wondering about this more and more as I develop more complex sites. Basically say we have a basic PHP / XHTML inbox (messaging system). I perform checks at the top (check if user is logged in, check if user has correct permissions etc). Then use the 'header('location:www.abc.com)' function if the authentication fails. The question is do I write the rest of the inbox code in a huge 'else' block or just use standard html. I read somewhere about about it being bad to put any code after using the 'header' function.

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• Declaring two classes that contain instance variables of each others' types.

  - by Benji XVI

  Let’s say you wish to have two classes like so, each declaring an instance variable that is of the other’s class. @interface A : NSObject { B *something; } @end @interface B : NSObject { A *something; } @end It seems to be impossible to declare these classes with these instance variables. In order for A to include an IV of class B, B must already be compiled, and so its @interface must come before A’s. But A’s must be put before B’s for the same reason. Putting the two class declarations in separate files, and #import-ing each other’s .h doesn’t work either, for obvious reasons. So, what is the solution? Or is this either (1) impossible or (2) indicative of a bad design anyway?

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• Main page content populated on the fly?

  - by jcovert

  Is there any reason to NOT have a webpage retrieve it's main content on the fly? For example, I have a page that has a header and a footer, and in the middle of this page is an empty div. When you click on one of the buttons in the header, an http GET is done behind the scenes and the .innerHTML() of the empty div is replaced with the result. I can't think of any reason why this might be a bad idea, but I can't seem to find any pages out there that do it? Please advise!

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• Migrating an Access Database into SharePoint 2007.

  - by Mike T

  To my surprise and delight I read that an adminsitrator can import (nearly directly) an Access 2007 database into a sharepoint site. Automagically, the database in transformed into lists and views with some table lookup thrown in for good measure. With Access 2007 installed on the client machine, even the forms and what not can still be reused. To me... this sounds to good to be true. Has anyone actually dones this? With all this good news, where is the bad stuff and pitfalls to this. Depending on the size of the database, wouldn't this some how "gum up the works" in the SharPoint database? Sources: http://madhurahuja.blogspot.com/2007/01/adding-data-to-sharepoint-l-ists-in.html http://social.technet.microsoft.com/Forums/en-US/sharepointadmin/thread/17745835-a861-4984-9f44-7291fdae7d07

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• int vs const int&

  - by Valdo

  I've noticed that I usually use constant references as return values or arguments. I think the reason is that it works almost the same as using non-reference in the code. But it definitely takes more space and function declarations become longer. I'm OK with such code but I think some people my find it a bad programming style. What do you think? Is it worth writing const int& over int? I think it's optimized by the compiler anyway, so maybe I'm just wasting my time coding it, a?

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• char '0x8' what character is this?

  - by OHHAI

  I have a large amount of data in a database. When I attempt to read a certain portion of the data and generate some xml and send it to a webservice I get the following exception... The char '0x8' in 'java.lang.IllegalArgumentException'. I'm guessing it is some bad data, as it has worked perfectly for about 7 months but now some user uploaded some new data that seems to have some issues. Anyone know what character this is so I can just run a sql query and clean it from the db? Thanks in advance.

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• Eclipse 3.5 (Cocoa) slowing down irregularly after some time

  - by chris_l

  Hi, I'd like to hear, if anyone else encounters the same problems, and doesn't use Google's GWT (2.0) plugins: Sometimes, my Eclipse 3.5 (Cocoa) slows down after some time of usage (=30 minutes), so that things like maximizing an editor or moving the splitters becomes unbearably slow (reacting only after several seconds). After an Eclipse restart, everything's fine again. I'm not running low on memory (neither free RAM, nor memory available to Eclipse - Heap/Stack/PermGenSpace), and my system specs are not too bad. I know exactly one other person so far, who sees the same problem - but he also uses the GWT plugins. Since these issues appear irregularly, they're hard to track. Before creating an issue on the GWT bug tracker, I'd like to find out, if this also happens for somebody without Google's plugins. Thanks, Chris Edit: I'm running Snow Leopard 10.6.2

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• The pImpl idiom and Testability

  - by Rimo

  The pImpl idiom in c++ aims to hide the implementation details (=private members) of a class from the users of that class. However it also hides some of the dependencies of that class which is usually regarded bad from a testing point of view. For example if class A hides its implementation details in Class AImpl which is only accessible from A.cpp and AImpl depends on a lot of other classes, it becomes very difficult to unit test class A since the testing framework has no access to the methods of AImpl and also no way to inject dependency into AImpl. This has been a problem for me lately and I am beginning to think that the pImpl idiom and writing testable code don't mix well. Has anyone come across this problem before? and have you found a solution?

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• jQuery lightBox plugin, problem with first image

  - by torm

  Hi, for start sorry for my bad english... but i have a little problem with this plugin. http://leandrovieira.com/projects/jquery/lightbox/ - to be sure we know what i'm talking about. So... i've got an image gallery with thumbs, and everything goes well.. except... when i click on the first image... it shows - ok, but i can go to the next image by clicking "next". It's loading all the time. When i choose second image... everything is allright, and i can skip to the next images... but i also cannot go back to the first one.

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• Totally fed-up with get Gtk widget height and width.

  - by PP

  Trying to get Height and Width of GtkEventBox. Tried following Things. GtkRequisition requisition; gtk_widget_get_child_requisition(widget, &requisition); // Getting requisition.height 0 ---------------------------------------------------------- widget->allocation-x //getting 0 widget->allocation-height //getting -1 ---------------------------------------------------------- gtk_widget_get_size_request( widget, &height, &width); // Again getting 0 -------------------------------------------------------------------------- It is really bad that Gtk has not provided simple function that will give you the actual displayed height and with of the widget. Anyone tried to get height and with of GtkWidget?

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• Use of 'standalone parentheses'

  - by zaf

  I just answered a question where I advised removing parentheses around a statement and was asked why, to which I had no answer when I realised that it caused no errors/warnings. I could only cite bad practice. But maybe I'm the one missing something... I did my own tests: (print('!')); // Outputs '!' ((print('!!'))); // Outputs '!!' (1); // No output (qwerty); // No output (1==2); // No output (1=2); // Syntax error // etc... Can someone shed some light on whats going on and of what use are 'standalone parentheses'?

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• PHP Localhost Application connect to server database

  - by Cross Vander

  I want to ask about how to connect my localhost application (C:xampp/htdocs/myproject) to database at my server host (www.someweb.somedomain)? Am I possible to do that? If it is, how to connect it at my php config? Right now my config (server.php) is: <?php $host = "my web IP public:3306"; $user = "root"; $pass = ""; $db = "dispatcherDB"; $conn = mysql_connect($host, $user, $pass) or die ("Cant connect to mySQL"); mysql_select_db($db); ?> what I got: Warning: mysql_connect(): No connection could be made because the target machine actively refused it. in C:\xampp\htdocs\XMS\server.php on line 7 So, what must I filled for $host? I'm trying using website IP, it still can't connect. Maybe there's someone here have experience at this problem? Sorry for my bad English

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