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  • Frustrated with Objective-c code...

    - by Moshe
    Well, I've started with iPod/iPhone programming using Head First iPhone Development (O'reilly) and I'm typing code out of the book. There are two problems, one is programming related and the other is not. I don't understand the format of objective-c methods. I'm getting an few errors now, based on source code from the book. Which leads me to my next issue. Some of the code is buggy. I think so because I couldn't get the code to run without modifying it. The book has some typos in the text since it's a first edition and whatnot, but could my "fixing" the code have to do with it? So... Where can I learn more about objective-c methods and how they work in terms of structure and where the return type and arguments go? For those with the book, I'm in the middle of the InstaTweet app towards the beginning. Thanks.

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  • Synonym for "Many-to-Many" relationship (relational databases)

    - by Byron
    What's a synonym for a "many-to-many" relationship? I've finished writing an object-relational mapper but I'm still stumped as to what to name the function that adds that relation. addParent() and addChild() seemed quite logical for the many-to-one/one-to-many and addSuperclass() for one-to-one inheritance, but addManyToMany() would sound quite unintuitive to an object-oriented programmer. addSibling() or addCousin() doesn't really make sense either. Any suggestions? And before you dismiss this as a non-programming question, please remember that consistent naming schemes and encapsulation are pretty integral to programming :)

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  • What is needed to get Delphi back on top?

    - by Jim McKeeth
    Delphi 2009 is due in the next couple months, which is its 12th release since Turbo Pascal became Delphi in 1995. Despite continued innovation it has not returned to its level of popularity before the Inprise fiasco. Many developers with Delphi backgrounds are moving to C# and many Delphi legacy applications are being rewritten in C#, despite the fact Delphi supports .NET and in many cases the existing application could be ported without rewriting. Is it just a losing battle to compete against Microsoft's tools on their platform? Is there something Code Gear / Delphi can do now that they are under new management to regain market share? What can enthusiasts do to help? Why do you do Delphi programming? or Why are you not doing Delphi programming?

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  • What is the life cycle of the XNA GraphicsDevice on the Xbox 360?

    - by David Brown
    I'm working on an XNA project that doesn't use the built-in Game class, mostly for learning purposes (so I can mess with different game loop types, etc). It's only designed for the Xbox 360, because the hardware is consistent and I don't have to worry about compatibility among different PC hardware configurations. So far, it's working well and I can clear the screen to a color, but I'd like to make sure I handle the GraphicsDevice correctly before moving on. What exactly is the life cycle for the GraphicsDevice on the Xbox 360? Is it ever lost or reset automatically? I know that on Windows, it's lost when the window loses focus, but the Xbox obviously doesn't manage focus. It appears to even keep the graphics device when the Guide pops up, which is the closest thing I can find to "losing focus" on the Xbox. I'd like to think it's simply a matter of "fire and forget," which would make a lot of other things much easier (only needing to load content once, for instance). But I want to make sure.

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  • EE Major : Should I learn Ruby on Rails or Haskell?

    - by Vivek
    Hi,I've just completed my freshman year in college and am majoring in EE (with a lot of interest in CS as well) . I know some Python,C/C++ and Java and also a little bit of Actionscript . I am planning to learn either Haskell or Ruby on Rails. Haskell because it is a functional programming language, and I've been really impressed by this paradigm and Ruby on Rails , as I don't know any 'web' programming language and have heard that you can develop apps in RoR very easily and quickly . Which one should I learn ? and please suggest some links / books for starting off .

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  • Where to go after Informix 4GL?

    - by Chris Harris
    We have a large homegrown ERP system written in Informix 4GL. Currently we are running on old Sun hardware, Solaris 8, and a ten year old version of 4GL and Informix. We need to move on, and one option obviously is to get the latest versions of 4GL & Informix, installed on new hardware (probably Linux/Intel). However I believe there are options for migrating 4GL programmes to other development platforms. Does anyone have experience of that? If so, what platforms, how did it go, what are the pros and cons?

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  • Wanting a simple overview on how to connect to a SQLite database in Cocoa/Objective-C

    - by Jesse
    Hi, everyone. I've been experimenting with Cocoa and Objective-C programming on the Mac for a few months now, and I am wanting to start developing applications that manage large amounts of data. The trouble is, I'm not really sure where to start with databases. I have a good background in Java programming with SQLite. I've read a bit about CoreData and I haven't been able to find any good resources for just manually connecting to the database. I'm looking for recommendations. Should I try CoreData, and if so, can anyone recommend a good tutorial for someone new to the language? Or, should I try to manually connect and query an SQLite database somehow, and, if so, any tutorials? Any help would be greatly appreciated! Thanks!

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  • Best 3D Graphics Engine for .NET

    - by George Stocker
    I've been thinking about tinkering with 3D graphics programming in .NET. In the past, I've thought about Truevision3D, and XNA, but I've not used either of these. I scanned Stackoverflow for the exact question, but neither of the (almost) relevant question (such as this question about rendering graphics, and this question about Learning Game Programming) answer my specific question. Out of the graphics engine APIs you've used for .NET, which is the easiest to use, which has the most features, and which is the cheapest? Which would you recommend for a .NET programmer to learn first?

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  • Hidden Features of PHP?

    - by George Mauer
    EDIT: This didn't really start as a hidden features of PHP topic, but thats what it ended up as, so go nuts. I know this sounds like a point-whoring question but let me explain where I'm coming from. Out of college I got a job at a PHP shop. I worked there for a year and a half and thought that I had learned all there was to learn about programming. Then I got a job as a one-man internal development shop at a sizable corporation where all the work was in C#. In my commitment to the position I started reading a ton of blogs and books and quickly realized how wrong I was to think I knew everything. I learned about unit testing, dependency injection and decorator patterns, the design principle of loose coupling, the composition over inheritance debate, and so on and on and on - I am still very much absorbing it all. Needless to say my programming style has changed entirely in the last year. Now I find myself picking up a php project doing some coding for a friend's start-up and I feel completely constrained as opposed to programming in C#. It really bothers me that all variables at a class scope have to be referred to by appending '$this-' . It annoys me that none of the IDEs that I've tried have very good intellisense and that my SimpleTest unit tests methods have to start with the word 'test'. It drives me crazy that dynamic typing keeps me from specifying implicitly which parameter type a method expects, and that you have to write a switch statement to do method overloads. I can't stand that you can't have nested namespaces and have to use the :: operator to call the base class's constructor. Now I have no intention of starting a PHP vs C# debate, rather what I mean to say is that I'm sure there are some PHP features that I either don't know about or know about yet fail to use properly. I am set in my C# universe and having trouble seeing outside the glass bowl. So I'm asking, what are your favorite features of PHP? What are things you can do in it that you can't or are more difficult in the .Net languages?

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  • What is the best IDE?

    - by venom
    Hello. As a not so experienced man in programming, I start to use netbeans PLATFORM. And I am really impressed by its power (for rich desktop app). I have been learning the programming in another way on university. I have never thought that something as powerful as nb Platform exists. My idea was that 30 people work on some rich desktop app for more than year to make it "beta". Now I know, that it is much more easier. But, I have never be satisfied with my own opinions about "something is best". I am still looking for better mouse trap. So the question is: What is most powerful IDE you know? (it does not strongly depends on language, it means if some combination of language/IDE is really powerful, feel free to answer.)

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  • Porting a project to OpenGL3

    - by Decapsuleur
    Hi everyone, I'm working on a C++ cross-platform OpenGL application (Windows, Linux and MacOS) and I am wondering if some of you could share some advices on porting a large application to OpenGL 3. The reason I am looking into OpenGL 3 is because I think we could benefit a lot from using the new "Sync objects". Nvidia has supported such an extension since the Geforce 256 days (gl_nv_fences) but there seems to be no equivalent functionality on ATI hardware before OpenGL 3.0+... Our code makes quite heavy use of glut/freeglut, glu functions, OpenGL 2 extensions and CUDA (on supported hardware). The problem I am now facing is that "gl3.h" and "gl.h" are mutually incompatible (as stated in gl3.h). Do you guys know if there is a GL3 glut equivalent ? Also, looking at the CUDA-toolkit header files, it seems that GL-CUDA interoperability is only available when using older versions of OpenGL... (cuda_gl_interop.h includes gl.h...). Am I missing something ? Thanks a lot for your help.

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  • Why isn't my bundle getting passed?

    - by NickTFried
    I'm trying to pass a bundle of two values from a started class to my landnav app, but according to the debug nothing is getting passed, does anyone have any ideas why? package edu.elon.cs.mobile; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; public class PointEntry extends Activity{ private Button calc; private EditText longi; private EditText lati; private double longid; private double latd; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.pointentry); calc = (Button) findViewById(R.id.coorCalcButton); calc.setOnClickListener(landNavButtonListener); longi = (EditText) findViewById(R.id.longitudeedit); lati = (EditText) findViewById(R.id.latitudeedit); } private void startLandNav() { Intent intent = new Intent(this, LandNav.class); startActivityForResult(intent, 0); } private OnClickListener landNavButtonListener = new OnClickListener() { @Override public void onClick(View arg0) { Bundle bundle = new Bundle(); bundle.putDouble("longKey", longid); bundle.putDouble("latKey", latd); longid = Double.parseDouble(longi.getText().toString()); latd = Double.parseDouble(lati.getText().toString()); startLandNav(); } }; } This is the class that is suppose to take the second point package edu.elon.cs.mobile; import com.google.android.maps.GeoPoint; import com.google.android.maps.MapActivity; import com.google.android.maps.MapController; import com.google.android.maps.MapView; import com.google.android.maps.MyLocationOverlay; import com.google.android.maps.Overlay; import android.content.Context; import android.graphics.drawable.Drawable; import android.hardware.Sensor; import android.hardware.SensorEvent; import android.hardware.SensorEventListener; import android.hardware.SensorManager; import android.location.Location; import android.location.LocationManager; import android.os.Bundle; import android.util.Log; import android.widget.EditText; import android.widget.TextView; public class LandNav extends MapActivity{ private MapView map; private MapController mc; private GeoPoint myPos; private SensorManager sensorMgr; private TextView azimuthView; private double longitudeFinal; private double latitudeFinal; double startTime; double newTime; double elapseTime; private MyLocationOverlay me; private Drawable marker; private GeoPoint finalPos; private SitesOverlay myOverlays; public LandNav(){ startTime = System.currentTimeMillis(); } public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.landnav); Bundle bundle = this.getIntent().getExtras(); if(bundle != null){ longitudeFinal = bundle.getDouble("longKey"); latitudeFinal = bundle.getDouble("latKey"); } azimuthView = (TextView) findViewById(R.id.azimuthView); map = (MapView) findViewById(R.id.map); mc = map.getController(); sensorMgr = (SensorManager) getSystemService(Context.SENSOR_SERVICE); LocationManager lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE); Location location = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER); int longitude = (int)(location.getLongitude() * 1E6); int latitude = (int)(location.getLatitude() * 1E6); finalPos = new GeoPoint((int)(latitudeFinal*1E6), (int)(longitudeFinal*1E6)); myPos = new GeoPoint(latitude, longitude); map.setSatellite(true); map.setBuiltInZoomControls(true); mc.setZoom(16); mc.setCenter(myPos); marker = getResources().getDrawable(R.drawable.greenmarker); marker.setBounds(0,0, marker.getIntrinsicWidth(), marker.getIntrinsicHeight()); me = new MyLocationOverlay(this, map); myOverlays = new SitesOverlay(marker, myPos, finalPos); map.getOverlays().add(myOverlays); } @Override protected boolean isRouteDisplayed() { return false; } @Override protected void onResume() { super.onResume(); sensorMgr.registerListener(sensorListener, sensorMgr.getDefaultSensor(Sensor.TYPE_ORIENTATION), SensorManager.SENSOR_DELAY_UI); me.enableCompass(); me.enableMyLocation(); //me.onLocationChanged(location) } protected void onPause(){ super.onPause(); me.disableCompass(); me.disableMyLocation(); } @Override protected void onStop() { super.onStop(); sensorMgr.unregisterListener(sensorListener); } private SensorEventListener sensorListener = new SensorEventListener() { @Override public void onAccuracyChanged(Sensor arg0, int arg1) { // TODO Auto-generated method stub } private boolean reset = true; @Override public void onSensorChanged(SensorEvent event) { newTime = System.currentTimeMillis(); elapseTime = newTime - startTime; if (event.sensor.getType() == Sensor.TYPE_ORIENTATION && elapseTime > 400) { azimuthView.setText(Integer.toString((int) event.values[0])); startTime = newTime; } } }; }

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  • Message pump in .NET Windows service

    - by Pickles
    I have a Windows Service written in C# that handles all of our external hardware I/O for a kiosk application. One of our new devices is a USB device that comes with an API in a native DLL. I have a proper P/Invoke wrapper class created. However, this API must be initialized with an HWnd to a windows application because it uses the message pump to raise asynchronous events. Besides putting in a request to the hardware manufacturer to provide us with an API that does not depend on a Windows message pump, is there any way to manually instantiate a message pump in a new thread in my Windows Service that I can pass into this API? Do I actually have to create a full Application class, or is there a lower level .NET class that encapsulates a message pump?

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  • Are there such things as summer jobs for teenage programmers?

    - by Gbps
    I've taken programming as a hobby, studying it since I was 10 or so. 7 years to date, I've become progressivly good at C++, PHP, C#, Assembly, Lua, and the web languages such as HTML and CSS. Though I've never taken a class, I've been able to complete most, if not all of the questions from different "Programmer Interview Questions" articles and have participated in some small scale projects in the past. Summer starting yesterday for me, I've been thinking about how to keep busy while maybe earning some money along the way. Now, some kids mow lawns, others get fast food jobs, but what about programming jobs? Is there even such a thing?

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  • Java and C#, how close are they?

    - by prosseek
    I've been using C/C++ and Python pretty seriously, but I now I see that a lot of new programming books use Java or C# as examples. I don't think I'll use Java or C# for the time being, but I guess I have to study one of the languages (or both of them) in order to read and understand the books. How similar Java and C#? If I learn Java, is learning C# almost free? Or vice versa? If I have to choose only one of the two languages, which would be better? Which has wider coverage in terms of programming language?

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  • C# Training Quizzes

    - by John Sheppard
    Hello there, I have been programming 10 years, mostly in vba and vb.net but I know c# well enough to program what I normally do. I yesterday was applying for a Senior c# position and I did so poorly on the induction test its not funny :) I have always found that for me the best way to learn and recall is via question's and answers (multichoice and short answer). That is, a question is posed and after I answer instant feedback is given as to whether I choose right or wrong and the reasons why. As such I was wondering if anyone knew of or could recommend a C# quiz website. Something like a daily c# quiz to keep my brain up to date and fresh if I'm not always programming in it. Not something wimpy either. Something that does everything. Paying is not an obstacle, id prefer to pay for a good resource than muck around. Thank you

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  • grails metaprogramming

    - by Don
    Hi, My understanding is that there are two obvious places in a Grails app where one can do meta-programming: The init closure of Bootstrap.groovy The doWithDynamicMethods closure of a plugin The meta-programming I'm referring to here should be visible throughout the metaprogramming, typical examples include adding (or replacing) methods of 3rd party classes. String.metaClass.myCustomMethod = { /* implementation omitted */ } The disadvantage of (1), is that the metaprogramming won't be applied when the application is dynamically reloaded. The disadvantage of (2) is that I need to create and maintain an entire plugin just for the sake of a little metaprogramming. Is there a better place to do this kind of metaprogramming? Thanks, Don

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  • What is the best API/framework/platform you ever worked with?

    - by Yuval A
    Most programming is done on an existing framework or platform, and using various APIs which make your programming job much more convenient. It can either be a superbly designed set of APIs, or a nice framework which you managed to get really cool things done really fast. All answers should give concrete examples of why that framework is so awesome, or examples of cool stuff you did with it. What existing framework really inspired you to do some awesome work? I know this is subjective, but I think we can get some cool ideas from this question. Please be easy on the "close" link :) Also - commun-ikified in advance.

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  • What (kind of) project could I create to learn JavaScript?

    - by Aziz Light
    Hello, I started learning JavaScript a while ago. It's a fairly easy programming language considering that I learned Java in university, that I know php pretty well and that I already played around with python and ruby. The problem is that to properly learn a programming language I usually create a project. In javascript, I just don't know what kind of project I could create - that is, a project that is not web-based or related to the web browser. Can I create javascript shell scripts? Where is javascript commonly used beside the web browsers? So, can someone actually give me some ideas please?

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  • Call a function by its name, given from string java

    - by Joao
    Hello, I would like to be able to call a function based on its name provided by a string. Something like public void callByName(String funcName){ this.(funcName)(); } I have searched a bit into lambda funcions but they are not supported. I was thinking about going for Reflection, but I am a bit new to programming, so I am not so familiar with the subject. This whole question was brought up on my java OOP class, when I started GUI (Swing, swt) programming, and events. I found that using object.addActionCommand() is very ugly, because I would later need to make a Switch and catch the exact command I wanted. I would rather do something like object.attachFunction(btn1_click), so that it would call the btn1_click function when the event click was raised. Thank you Joao

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