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• 2-column table with two foreign keys. Performance/design question.

  - by Emanuel

  Hello everyone! I recently ran into a quite complex problem and after looking around a lot I couldn't find a solution to it. I've found answers to my questions many times before on stackoverflow.com, so I decided to post here. So I'm making a user/group managment system for a web-based project, and I'm storing all related data into a postgreSQL…

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• Interview question : What is the fastest way to generate prime number recursively ?

  - by hilal

  Generation of prime number is simple but what is the fastest way to find it and generate( prime numbers) it recursively ? Here is my solution. However, it is not the best way. I think it is O(N*sqrt(N)). Please correct me, if I am wrong. public static boolean isPrime(int n) { if (n < 2) { return false; } else…

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• Layout question with BlackBerry IDE FieldManagers; how to emulate HTML's rowspan

  - by canadiancreed

  Hello all I'm trying to create a page where a list of items are displayed in a row where there are multiple columns on the left, but only one on the right, encased within a horizontialFieldManager. Currently I have the following code to attempt to do the following: VerticalFieldManager mainScreenManager = new VerticalFieldManager(); …

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• Beginner MVC question - Correct approach to render out a List and details?

  - by fizzer

  I'm trying to set up a page where I display a list of items and the details of the selected item. I have it working but wonder whether I have followed the correct approach. I'll use customers as an example I have set the aspx page to inherit from an IEnumerable of Customers. This seems to be the standard approach to display the list…

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• C# - Basic question: What is '?' ?

  - by Amokrane

  Hi, I'm wondering what ? means in C# ? I'm seeing things like: DateTime? or int?. I suppose this is C# specific to C# 4.0? I can't look for it in Google because I don't know the name of this thing. The problem is I'm using DateTime and I have a lot of cast errors (from DateTime to DateTime?). Thank you

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• Access SQL query to SELECT from one table and INSERT into another

  - by typoknig

  Below is my query. Access does not like it, giving me the error Syntax error (missing operator) in query expression 'answer WHERE question = 1'. Hopefully you can see what I am trying to do. Please pay particular attention to 3rd, 4th, and 5th lines under the SELECT statement. INSERT INTO Table2 (respondent,1,2,3-1,3-2,3-3,4,5)…

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• Entity Framework. Noob question: How do you refresh the model when the db changes?

  - by George

  If you build the edmx file from the database and then the db changes, how do you get the model to pick up the change? Do you delete the whole model and regenerate or can you detect changes? I'm just starting out...

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• c++ design question: Can i query the base classes to find the number of derived classes satisfying a

  - by vivekeviv

  I have a piece of code like this class Base { public: Base(bool _active) { active = _active; } void Configure(); void Set Active(bool _active); private: bool active; }; class Derived1 : public Base { public: Derived1(bool active):Base(active){} }; similarly Derived 2 and Derived 3 Now if i call derived1Object.Configure, i…

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• A beginner's question...How do I use $_POST instead of $_GET? (PHP)

  - by ggfan

  Okay, for all my coding so far I been using GETs and only $_POST on the same script. Ex: profile.php would show all the posts an user made and under each of their post, they can edit their post. The way I been using it is through $_GETs. So.. //this is the link users click to edit their post echo '<td><a…

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• Objective-C style question: do "release" or "nil" properties in dealloc?

  - by Piotr Czapla

  Hi, Apple usually release ivars in dealloc but is there anything wrong with nilling the properties in dealloc? I mean instead of this: - (void) dealoc(){ [myRetainedProperty release]; [super dealloc]; } write code like this: - (void) dealoc(){ self.myRetainedProperty = nil; [super dealloc]; } I know…

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• Question about the String.replaceAll() and String.replaceFirst() method.

  - by Java Doe

  I need to do a simple string replace operation on a segment of string. I ran into the following issue and hope to get some advice. In the original string I got, I can replace the string such as to something else. BUT, in the same original string, if I want to replace a much long string such as the following, it won’t…

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• work question how to start working as a programmer what do i need!

  - by giorgo

  Hi i am learning java and php i have some projects from uni.(Gui,s in java with mysql and a web application in php with mysql ++ more things like this.) i have started learning mvc struts spring and i also lerning php +zend +++++ more stuff etc....you can't learn everything!!!!!!!!!!!!!!!!!!!!!!! I would like to ask how…

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• Where to start with the development of first database driven Web App (long question)?

  - by Ryan

  Hi all, I've decided to develop a database driven web app, but I'm not sure where to start. The end goal of the project is three-fold: 1) to learn new technologies and practices, 2) deliver an unsolicited demo to management that would show how information that the company stores as office documents spread across a…

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• Google App Engine/GWT/Eclipse Plugin Newbie Question- how to autobuild client side resources?

  - by Dieter Hanover

  Hi there, I'm tinkering with the default GWT application generated by the Google Eclipse plugin when I click the Google "New Web Application Project" button in Eclipse 3.5. This will no doubt be familiar to many of you.. basically there is an h1 title stating "Web Application Starter Project," a text field, and a…

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• Maybe This is dead-simple stupid question, but how PHP translate our code ?

  - by justjoe

  i got this code ` // // prints out "Hello World!" // hello_world(); //First call function hello_world() { echo "Hello World!<br/>\n"; } hello_world(); //second call ?>` Both of 'hello_world' call will print out the same result. It's easily to understand why the second call will…

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• PHP HTTP POST Question - How do you pass data from multiple forms as HTTP Post?

  - by matt

  I have a step 1 page, and a step 2 page. I want to take the information from step 1 page, then step 2 page, and save as session information (which i have already done). Once this information is all gathered i then want to be able to submit it to another php page using HTTP POST.

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• How to log php error in a separate file?

  - by Question Overflow

  I just did an upgrade of my server to Fedora 17 and merged some configuration files containing .rpmnew into the existing ones. I have been successfully logging my php errors in a separate log file by keeping the following in php.ini: log_errors = On error_log = /var/log/php-errors.log I am not sure why the…

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• QT Question (general math really): How can I tell if an Ellipse and a Line have an intersection?

  - by asdsa

  The ellipse is actually a circle. I know all the coordinates of both things, I just need to know whether or not a line goes through an ellipse. Is this built in anywhere? SPecifically I am using QGraphicsEllipseIem and QLine but i can convert them to any other type thanks

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• Question: can the title of my setting differ from the title of my executable/application?

  - by user100017

  Hi there, I'm developing an application which has a Settings pane, following the AppPrefs sample by Apple. If my application is named AppPrefs, this is the exact name/prompt/ title the Settings application will provide. Is there anyway to make this change? Can my executable somehow be named (for…

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• iOS sdk question: how do I cast a UIView to a UIImage View (alternativly how do I get a UIImageView from a GestureRecognzer?)

  - by user439299

  Desired end result: user taps a UIImageView and the image changes to another image (a subsequent tap returns the image to the original state) Problem: I add a (unique) selector to a bunch of UIImageViews (in an array) and point the action at the same function - let's call this function imageTapped:…

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• jQuery: Quick question. How to select string variable?

  - by user317563

  Hello world, EDIT: I would like to avoid doing something like this: var str = 'Hello'; if ( str == 'Hello') { alert(str); } I would rather do: var str = 'Hello'; $(str).filter(':contains("Hello")').each(function(){ alert(this) }); I've tried a lot of things: …

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• Noob question: Draw a quad parallel to the view.

  - by Jack

  Hi all, ok what I want to do is to draw a quad in the scene that lays on a plane parallel to the view. So it should appear flat. More in particular, I think I didn't get very well how the mechanism of gluLookAt works in comparison with the functions glTranslate and glRotate: If…

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• Question in reading gnumake tuto:when does implicit rule apply for make?

  - by Mask

  It says: In general,make searches for an implicit rule for each target[1], and for each double-colon rule[2], that has no commands[3]. This can have two different understanding: 1 or (2 and 3) (1 or 2) and 3 Which does it mean?

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• How to calculate the y-pixels of someones weight on a graph? (math+programming question)

  - by RexOnRoids

  I'm not that smart like some of you geniuses. I need some help from a math whiz. My app draws a graph of the users weight over time. I need a surefire way to always get the right pixel position to draw the weight point at for a given weight. For example, say I want to plot the…

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• Beginner Question ; About Prime Generation in "C" - What is wrong with my code ? -

  - by alorsoncode

  I'm a third year irregular CS student and ,i just realized that i have to start coding. I passed my coding classes with lower bound grades so that i haven't a good background in coding&programming. I'm trying to write a code that generates prime numbers between given upper…

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