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• Learning to create beautiful /next-generation GUI

  - by ShaChris23

  I really want to create a stunning-looking GUI desktop application that looks like, for example: Mac OS X interface Picasa desktop client on windows IPhone apps Office 2007 I've mostly been programming GUI using Qt/Swing/WinForm and I'm tired of creating so plain looking GUI, lol. So I was thinking about diving into stuff like: jQuery WPF/C# iPhone SDK Silverlight Adobe Air/Flex Just to get some ideas on how to create really cool looking UI. Does that sound like a good list? Any developers here that could share what platform they use to create very cool looking desktop app? On a sidenote, I really wonder what developers at Apple / Microsoft use to develop their own cool-looking software. EDIT A lot of responses talk about the importance of usability over "cool-looking".. I totally agree that usability and simplicity are the most important aspects of user interface design. I've been doing GUI development for a while now ( 3 years), so that I understand. But using cool-looking UI also improves user experience + it could make big difference on whether or not your software sells. I mean, otherwise why would Microsoft/Apple try to make their OS UI look "cooler" everytime there's a new version? Why would websites like pragprog.com, or versionsapp.com. make their websites look like that? Basically you kill 2 birds with one stone: stunnning-looking UI + super usability (because it looks simple and intuitive). That is what I'm striving for. And as far as I know, I cannot achieve that using Qt/Winform. Most of the books I have read just show you how to make average-looking (read: 1990's) UI. I want to learn how to create cool-looking UI. And the only place I see cool-looking UIs these days are the technology I list above. I'm not enamored with any technology; but I just want to know how things are done in other technology to see if I could apply them to the technology I'm using, or see if I could use those technology in my line of work. An example: if I were to pick between this UI and this UI, I probably would pick the latter, if just based on looks alone. Functionally, they are just the same UI; they both allow you to keep track of your time. They both contain buttons and textboxes, etc. But the fact that they look different, also differentiate them in terms of attractiveness. So in all, I think the "ice on the cake" is very important. I would say it's the thing you strive for after you are certain you have a totally intuitive, usable UI.

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• Learning Hibernate: too many connections

  - by stivlo

  I'm trying to learn Hibernate and I wrote the simplest Person Entity and I was trying to insert 2000 of them. I know I'm using deprecated methods, I will try to figure out what are the new ones later. First, here is the class Person: @Entity public class Person { private int id; private String name; @Id @GeneratedValue(strategy = GenerationType.TABLE, generator = "person") @TableGenerator(name = "person", table = "sequences", allocationSize = 1) public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } } Then I wrote a small App class that insert 2000 entities with a loop: public class App { private static AnnotationConfiguration config; public static void insertPerson() { SessionFactory factory = config.buildSessionFactory(); Session session = factory.getCurrentSession(); session.beginTransaction(); Person aPerson = new Person(); aPerson.setName("John"); session.save(aPerson); session.getTransaction().commit(); } public static void main(String[] args) { config = new AnnotationConfiguration(); config.addAnnotatedClass(Person.class); config.configure("hibernate.cfg.xml"); //is the default already new SchemaExport(config).create(true, true); //print and execute for (int i = 0; i < 2000; i++) { insertPerson(); } } } What I get after a while is: Exception in thread "main" org.hibernate.exception.JDBCConnectionException: Cannot open connection Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Too many connections Now I know that probably if I put the transaction outside the loop it would work, but mine was a test to see what happens when executing multiple transactions. And since there is only one open at each time, it should work. I tried to add session.close() after the commit, but I got Exception in thread "main" org.hibernate.SessionException: Session was already closed So how to solve the problem?

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• Summer Learning Opportunities for an upcoming College Freshman

  - by SteveStifler

  I'm currently a senior in high school, about to matriculate and pursue a major in Computer Science (possibly dual-major with electrical engineering. Comments?). I already program regularly as a hobby, but I would like to get a jump start this summer by perhaps attending a seminar, helping out on an open source project...you know, something legitimate that will bolster my knowledge of the computer science field. Any ideas?

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• AttributeError HELP!

  - by C0d3r

  class Account: def __init__(self, initial): self.balance = initial def deposit(self, amt): self.balance = self.balance + amt def withdraw(self,amt): self.balance = self.balance - amt def getbalance(self): return self.balance a = Account(1000.00) a.deposit(550.23) a.deposit(100) a.withdraw(50) print a.getbalance() I get this error when I run this code.. AttributeError: Account instance has no attribute 'deposit'

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• Newbie: UINavigationController is pulling me back from further learning :(

  - by nithin

  I have created a window-based application and my problem is I am unable to create UINavigationController on the go. InFact I don't know how to do that. My AppDelegeate - (void)applicationDidFinishLaunching:(UIApplication *)application { // Override point for customization after application launch [window addSubview:logInView.view]; [window makeKeyAndVisible]; } here the logInView is an object of @interface LogInViewController : UIViewController { IBOutlet UITextField *usernameField; IBOutlet UITextField *passwordField; IBOutlet UIButton *logInButton; } -(IBAction) logInClick:(id) sender; from the click action of this loginviewcontroller It should be showing the home screen with navigation controller. and I have to add many subviews. My question is where should I init the UINavigationController and where could I write the codes for adding subviews? how to map it with interfacebuilder?

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• Learning web development as I go

  - by Matt Luongo

  Hey everybody, I've been seriously preparing to take the entrepreneurship leap. I've got a great partner, and we're going to take on some minor funding, and do the thing. Our product is web-based- I'll deem it YAWA (Yet Another Web Application). Both my partner and I have database and web development experience, and I've had a front-end developer in mind for a while. Except, well- he just bowed out. I know a fair amount about the associated technologies (XHTML, CSS, Javascript and some JQuery) interface-side, but I've never had to deal with real-world scenarios, eg cross-browser design. Am I going to be able to survive without this guy? Is it realistic to believe that I can learn the details as I go?

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• Setup SSL (self signed cert) with tomcat

  - by Danny

  I am mostly following this page: http://tomcat.apache.org/tomcat-6.0-doc/ssl-howto.html I used this command to create the keystore keytool -genkey -alias tomcat -keyalg RSA -keystore /etc/tomcat6/keystore and answered the prompts Then i edited my server.xml file and uncommented/edited this line <Connector port="8443" protocol="HTTP/1.1" SSLEnabled="true" maxThreads="150" scheme="https" secure="true" clientAuth="false" sslProtocol="TLS" keystoreFile="/etc/tomcat6/keystore" keystorePass="tomcat" /> then I go to the web.xml file for my project and add this into the file <security-constraint> <web-resource-collection> <web-resource-name>Security</web-resource-name> <url-pattern>/*</url-pattern> </web-resource-collection> <user-data-constraint> <transport-guarantee>CONFIDENTIAL</transport-guarantee> </user-data-constraint> </security-constraint> When I try to run my webapp I am met with this: Unable to connect Firefox can't establish a connection to the server at localhost:8443. * The site could be temporarily unavailable or too busy. Try again in a few moments. * If you are unable to load any pages, check your computer's network connection. If I comment out the lines I've added to my web.xml file, the webapp works fine. My log file in /var/lib/tomcat6/logs says nothing. I can't figure out if this is a problem with my keystore file, my server.xml file or my web.xml file.... Any assistance is appreciated I am using tomcat 6 on ubuntu.

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• Build path issues learning Guice

  - by Preston

  I can't figure out why I'm getting this error below I have included all the appropriate jars as far as I can tell(I have included eclipses .classpath file below.) All of the classpath entries resolve just fine. What am I missing? The type javax.servlet.ServletContextListener cannot be resolved. It is indirectly referenced from required .class files on the "extends GuiceServletContextListener" line - import com.google.inject.Guice; import com.google.inject.Injector; import com.google.inject.servlet.GuiceServletContextListener; import com.google.inject.servlet.ServletModule; public class ServletConfig extends GuiceServletContextListener { @Override protected Injector getInjector() { return Guice.createInjector(new ServletModule(){ @Override protected void configureServlets() { // TODO: add necessary code to bind } }); } } .Classpath <?xml version="1.0" encoding="UTF-8"?> <classpath> <classpathentry kind="src" path="src"/> <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/jdk1.7.0_21"> <attributes> <attribute name="owner.project.facets" value="java"/> </attributes> </classpathentry> <classpathentry kind="con" path="oracle.eclipse.tools.glassfish.lib.system"> <attributes> <attribute name="owner.project.facets" value="jst.web"/> </attributes> </classpathentry> <classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.web.container"/> <classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.module.container"/> <classpathentry kind="lib" path="guice-3.0/aopalliance.jar"/> <classpathentry kind="lib" path="guice-3.0/guice-3.0.jar"/> <classpathentry kind="lib" path="guice-3.0/guice-servlet-3.0.jar"/> <classpathentry kind="lib" path="guice-3.0/javax.inject.jar"/> <classpathentry kind="output" path="build/classes"/> </classpath>

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• Self Assesstment Tests for Programmers

  - by THX1138.6

  I want to help the Dev team identify areas of knowledge (practical and theoretical) that they can work on. Though I am big believer in focusing on people's strengths being a good programmer requires (I think) being challenged by concepts and ideas that don't always come naturally. We work largely in the web app space using PHP & MySQL but better skills in data modelling, query optimisation, use of MVC and OOP etc. would help the team and the company a lot. I want to help the Dev team manage their careers, explore and expand their skills sets. Be all they can be and better than they were previously. I know its an idealistic goal but work must be about more than simply getting the work done. There should be some time to review, to learn, to grow and get better. Any thoughts, ideas, opinions and directions to tests or similar resources would be greatly appreciated.

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• J2EE fast track (Learning Enterprise Java real fast)

  - by IndexController

  Hello, We just started a new project in J2EE in our office and i am required to participate effectively. I mostly work on web applications and I use PHP/MySql but I also know J2SE and have written couple of standalone applications. I need help and advise on how i can learn J2ee very fast so that i can blend into the project without difficulties. I need help with book & tutorial recommendations and also links to resources. Thank you for your time.

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• quick question about learning c#

  - by Oliver Bayes-Shelton

  Hi, I am looking to buy my first c# book, at the moment amazon have a special offer on two titles Sams Teach Yourself the C# Language and Sams Teach Yourself Visual C# 2008 my qutestion is if their a difference between visual C# and C# ? also which book would be better for an intro to C#

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• Self documenting REST interface

  - by KandadaBoggu

  I have a Rails based server running several REST services and a Rails based web UI that interacts with the server using ActiveResource. Same server is being used by other clients( e.g: mobile). I have to generate documentation for the REST interface. I need to provide service URL, input/output and error document structure for each service. Ideally, I would like to use an interceptor at the server side that will document the service based on the existing traffic. I am wondering if there is a gem to do this.

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• Learning MVC - Maintaining model state

  - by GenericTypeTea

  First of all, I'm very new to MVC. Bought the books, but not got the T-Shirt yet. I've put together my first little application, but I'm looking at the way I'm maintaining my model and I don't think it looks right. My form contains the following: <% using (Html.BeginForm("Reconfigured", null, FormMethod.Post, new { id = "configurationForm" })) { %> <%= Html.DropDownList("selectedCompany", new SelectList(Model.Companies, Model.SelectedCompany), new { onchange = "$('#configurationForm').submit()" })%> <%= Html.DropDownList("selectedDepartment", new SelectList(Model.Departments, Model.SelectedDepartment), new { onchange = "$('#configurationForm').submit()" })%> <%=Html.TextArea("comment", Model.Comment) %> <%} %> My controller has the following: public ActionResult Index(string company, string department, string comment) { TestModel form = new TestModel(); form.Departments = _someRepository.GetList(); form.Companies = _someRepository.GetList(); form.Comment = comment; form.SelectedCompany = company; form.SelectedDepartment = department; return View(form); } [HttpPost] public ActionResult Reconfigured(string selectedCompany, string selectedDepartment, string comment) { return RedirectToAction("Index", new { company = selectedCompany, department = selectedDepartment, comment = comment}); } And finally, this is my route: routes.MapRoute( "Default", "{controller}/{company}/{department}", new { controller = "CompanyController", action = "Index", company="", department="" } ); Now, every time I change DropDownList value, all my values are maintained. I end up with a URL like the following after the Reconfigure action is called: http://localhost/Main/Index/Company/Sales?comment=Foo%20Bar Ideally I'd like the URL to remain as: http://localhost/Main/Index My routing object is probably wrong. This can't be the right way? It seems totally wrong to me as for each extra field I add, I have to add the property into the Index() method? I had a look at this answer where the form is passed through TempData. This is obviously an improvement, but it's not strongly typed? Is there a way to do something similar but have it strongly typed? This may be a simple-enough question, but the curse of 10 years of WinForms/WebForms makes this MVC malarky hard to get your head 'round.

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• Where can I get material for learning EBNF?

  - by yesraaj

  Extended Backus–Naur Form: EBNF I'm very new to parsing concepts. Where can I get sufficiently easy to read and follow material for writing a grammar for the boost::spirit library, which uses a grammar similar to EBNF? Currently I am looking into EBNF from Wikipedia.

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• (fluxus) learning curve

  - by Inaimathi

  I'm trying to have some fun with fluxus, but its manual and online docs all seem to assume that the reader is already an expert network programmer who's never heard of Scheme before. Consequently, you get passages that try to explain the very basics of prefix notation, but assume that you know how to pipe sound-card data into the program, or setup and connect to an OSC process. Is there any tutorial out there that goes the opposite way? IE, assumes that you already have a handle on the Lisp/Scheme thing, but need some pointers before you can properly set up sound sources or an OSC server? Barring that, does anyone know how to get (for example) the system microphone to connect to (fluxus), or how to get it to play a sound file from disk?

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• Need some ignition for learning Embedded Systems

  - by Rahul

  I'm very much interested in building applications for Embedded Devices. I'm in my 3rd year Electrical Engineering and I'm passionate about coding, algorithms, Linux OS, etc. And also by Googling I found out that Linux OS is one of the best OSes for Embedded devices(may be/may not be). I want to work for companies which work on mobile applications. I'm a newbie/naive to this domain & my skills include C/C++ & MySQL. I need help to get started in the domain of Embedded Systems; like how/where to start off, Hardware prerequisites, necessary programming skills, also what kind of Embedded Applications etc. I've heard of ARM, firmware, PIC Micorcontrollers; but I don't know anything & just need proper introduction about them. Thanx. P.S: I'm currently reading Bjarne Struotsup's lecture in C++ at Texas A&M University, and one chapter in it describes about Embedded Systems Programming.

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• Self-describing file format for gigapixel images?

  - by Adam Goode

  In medical imaging, there appears to be two ways of storing huge gigapixel images: Use lots of JPEG images (either packed into files or individually) and cook up some bizarre index format to describe what goes where. Tack on some metadata in some other format. Use TIFF's tile and multi-image support to cleanly store the images as a single file, and provide downsampled versions for zooming speed. Then abuse various TIFF tags to store metadata in non-standard ways. Also, store tiles with overlapping boundaries that must be individually translated later. In both cases, the reader must understand the format well enough to understand how to draw things and read the metadata. Is there a better way to store these images? Is TIFF (or BigTIFF) still the right format for this? Does XMP solve the problem of metadata? The main issues are: Storing images in a way that allows for rapid random access (tiling) Storing downsampled images for rapid zooming (pyramid) Handling cases where tiles are overlapping or sparse (scanners often work by moving a camera over a slide in 2D and capturing only where there is something to image) Storing important metadata, including associated images like a slide's label and thumbnail Support for lossy storage What kind of (hopefully non-proprietary) formats do people use to store large aerial photographs or maps? These images have similar properties.

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• Ruby/IRB self help

  - by mozillalives

  I'm new to Ruby - what tricks can I use to help me find documentation on a object I'm working with? Normally I just do a_var.class or a_var.methods and try to guess what I need or search the web for documentation. Are there other methods or modules that might help?

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• Learning Lisp - Why ?

  - by David

  I really feel that I should learn Lisp and there are plenty of good resources out there to help me do it. I'm not put off by the complicated syntax, but where in "traditional commercial programming" would I find places it would make sense to use it instead of a procedural language. Is there a commercial killer-app out there that's been written in Lisp ?

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• Where Should I Begin Learning Struts?

  - by Justin Nelson - jjnguy

  I need to use struts for a class I am taking. What is the best web resource to begin looking at how to set up a struts application from scratch? I am already familiar with JSP's. This is for Struts 1 by the way.

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• C# Application self-destroy at specific date

  - by DanSogaard

  Is there anyway I can use to destroy my deployed application at specific date?. How can I order the application to destroy itself at specific date after installation?. Say I deployed my C# application at PC1 today. After a specific date the application is deleted and removed off PC1 automatically (Installation folder removed). How can I do that?. If this is not possible, at least how can I prevent the user from using it anymore after specific date?.

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• Learning Modelling

  - by me1234

  Is there a good book which I can follow to learn modelling/doing architecture? Good samples? What would you do if you have to learn modelling from very basics? Thanks

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• how to save a gtktextbuffer content in file

  - by user1565593

  i tried to save sengtktextbuffer content in a file. my code seens working but i have a problem in file. some characters are unreadable in outfile outfile my code: def on_save_clicked(self, widget, data=None): start = self.textbuffer.get_start_iter() end = self.textbuffer.get_end_iter() this = self.textbuffer.get_text(start, end, False) format = self.textbuffer.register_serialize_tagset(this) data = self.textbuffer.serialize(self.textbuffer, format, start, end) outfile = open("/home/christophe/toto.txt", "w") outfile.write(data) outfile.close() what is wrong in my code? thanks for your help

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• What's the best self-tracking software for Linux?

  - by trench

  I'm looking for a way to track myself and receive quality data upon which I can write future scripts/programs. For example, I use Google Reader a lot. I'd like to track the hrefs that garner my clicks. Further, I'd like to drop all of the words of each href into a database where they can be stacked in a hierarchical manner. At the end of the week I want to know that "Ubuntu" garnered 448 clicks and "Cheetos" garnered 2. :) That's just one example... I'd like this tracking and data-collecting to extend beyond my browser. I know writing something to do this myself wouldn't be too awfully difficult but if something already exists I'd happily use it. Thanks in advance. Primary OS: Ubuntu 10.04

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• How to Delete all data from a table which contain self referencing foreign key

  - by Shantanu Gupta

  I have a table which has employee relationship defined within itself. i.e. EmpID Name SeniorId ----------------------- 1 A NULL 2 B 1 3 C 1 4 D 3 and so on... Where Senior ID is a foreign key whose primary key table is same with refrence column EmpId I want to clear all rows from this table without removing any constraint. How can i do this? Deletion need to be performed like this 4, 3 , 2 , 1 How can I do this

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