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  • What is the annoying/lacking feature in C#, in your opinion?

    - by Vimvq1987
    To be honest, I'm working with C# everyday, and I can say that I love its elegant syntax. But no language is perfect, so does C#. In my opinion, these two features are missing: Full-featured enum. I was pretty happy with enum in C#, until I know about enum in Java. Of course, we can "simulate" a full-featured enum in C# by class, but it's much better if Microsoft simplify this. Immutable keyword. We are told to let a class/struct immutable whenever possible. But to do that, we have to add readonly keyword to every field, and then if we add setter by a mistake, our class will be mutable, and nobody knows. By immutable keyword, every field will be automatically readonly, and any setter will be prohibited (error when compile). It's like static keyword added to class in C# 2.0 well. what's is your annoying/lacking feature in C#?

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  • Type Conversion in JPA 2.1

    - by delabassee
    The Java Persistence 2.1 specification (JSR 338) adds support for various new features such as schema generation, stored procedure invocation, use of entity graphs in queries and find operations, unsynchronized persistence contexts, injection into entity listener classes, etc. JPA 2.1 also add support for Type Conversion methods, sometime called Type Converter. This new facility let developers specify methods to convert between the entity attribute representation and the database representation for attributes of basic types. For additional details on Type Conversion, you can check the JSR 338 Specification and its corresponding JPA 2.1 Javadocs. In addition, you can also check those 2 articles. The first article ('How to implement a Type Converter') gives a short overview on Type Conversion while the second article ('How to use a JPA Type Converter to encrypt your data') implements a simple use-case (encrypting data) to illustrate Type Conversion. Mission critical applications would probably rely on transparent database encryption facilities provided by the database but that's not the point here, this use-case is easy enough to illustrate JPA 2.1 Type Conversion.

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  • Friday Fun: Z-Type

    - by Asian Angel
    This week’s game is a bit like Space Invaders except you use typing to defend your position. Defending your position will be easy enough at first, but things will quickly become complicated! Do you have the speed and accuracy required to survive or will the enemy have the last word? HTG Explains: Why Do Hard Drives Show the Wrong Capacity in Windows? Java is Insecure and Awful, It’s Time to Disable It, and Here’s How What Are the Windows A: and B: Drives Used For?

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  • Randomization of biomes

    - by user24527
    You know how in Minecraft, the World is ever-expanding and all the biomes are randomized? My generalized question is: In relation to a space simulation that is also ever-expanding as the player moves about the world, how would one go about programming this randomization in Java? My real question is: Could I get a simplified example broken down into these example classes: astroids (This would include how many astroids there are, their positioning in space, their size, how often the larger astroids occur, how close they are to each other, the limitations of how many of the large asteroids can be in one field, how often astroid fields are generated, etc.) star-types (size, color, type, how often they occur, where hey occur, etc.) inhabitable-planets (size, positioning, how often they're generated, where they are generated, etc.) This would be very helpful currently since I wish to make a simplified version of such a program.

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  • How to start embedded development for developing a handheld game console?

    - by Quakeboy
    I work as a iPhone app developer now, so I know a bit of c, c++ and objective c. Also have fiddled with Java and many other. All of them have been just high level application/games development. My final goal is to make a handheld game console. More like a home made NES/SNES handheld console or even an Atari. I have found out about RaspberryPI and Arduino. But I need more information about how to approach this. 1) How Do I learn to pick the best board/cpu/controller/GPU/LCD screen/LCD controller etc? 2) Will learning to make a NES emulator first help me understand this field? If so are there any tutorials?

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  • How to render Minecraft on the GPU?

    - by l0b0
    Hardware: Intel i7 AMD Radeon HD 6970 SSD with plenty of space 6 GB RAM Software OpenJDK 6, 7, and Oracle Java 7 (reproducible with all three) AMD Catalyst 12.8 and open source driver (reproducible with both) Ubuntu 12.04 x86_64 and older Minecraft 1.3.2 vanilla and older On this setup I am getting rubbish frame rates after a short while of playing, dropping from about 45-55 to 15 in a couple of minutes. CPU use is 40-45 even when rendering the opening screen at 1920x1280, and gameRenderer is using about 90% CPU when playing. Rather than trying to eke out a few more FPS out of an obviously broken rendering pipeline, I really hope to find a solution to make the GPU render Minecraft.

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  • Running projects from NTFS partition on Ubuntu

    - by the_hamster
    I'm dual booting Windows 7/Ubuntu 12.04. I want to run C++/Java projects from a NTFS partition, where I keep generally all my files and projects. I fiddled with the fstab. One time I removed 'noexec', the other I changed it to 'exec'. After that,each time, I remounted the partition and it still didn't work. I tried using sudo mount -o remount,exec /media/mypartition It didn't work either. There was a somewhat similar question already, but it didn't have the proper answer for me or I didn't know how to make it work(note: I am a total newbie with Ubuntu and Linux in general).

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  • I can't link my Algorithms and the problem idea with writing the code?

    - by Novice Programmer
    First ,, i have just learnt c , c++ and started with java .. i faced serious problem in the first two ones . any sort of problem i can handle with it on my mind ,, if it's much complex i use the pen and paper method , i nearly could solve any easy problem ,, but when i start to write the code i don't know what's happening i got totally lost and even the best problems i can't link the solution with the code . it's not a problem with syntax because i know the syntax well . i need to figure what's the problem and find a way to solve it !! thanks . (Excuse me for my bad English)

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  • How to organize functional programs

    - by bleakcabal
    In OOP, your basic unit of organization for code is the class. A frequently used methodology in Java, C# and similar languages is to organize your code around having one file for each class with the file name following the class name. You can consider each of these class as a unit of organization to group a single concept. These classes are in in namespaces which often follow the directory structure of the files in the solution/project. Namespaces are another level of organization. How are large projects in functional languages typically organized? How to you determine how to split your functions into different files? Are other units of grouping beside files used? How is code typically organized within a single file?

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  • SharePoint Apps a word of caution

    - by Sahil Malik
    SharePoint 2010 Training: more information Lucky for SharePoint, it is the first foray into this brave world where the browser is masquerading as an operating system. For the very first time, with SharePoint 2013, we will have apps from different vendors, talking to different domains live in the browser. Sound fun eh? Well, all is hunky dory until you consider that browsers don’t have concepts such as process isolation, encryption, obfuscation etc.. Stuff that we are so used to in operating systems that we don’t even think about it. Browsers have JavaScript, and broken HTML5 – it is not secure! In fact, in the current technology spectrum you cannot achieve anything other than laughable security at message level without involving a plugin or some sort of thick code like Java. The only security worth it’s salt in pure html/javascript scenarios, still, is transport security – and that’s it. Read full article ....

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  • understanding computers [closed]

    - by Ashwin
    Possible Duplicate: Good resources to understand how a program interacts with machine hardware I don't know if this is the correct StackExchange site to ask this question. But I could not find any other. I want to understand how a computer works from the software level to the internal structure. For example what happens when I press a button on keyboard. The OS interprets it and then what changes happen in the flip-flops. How is an operating system written? If it is written using some programming language, then how is that interpreter written. At some point it has to come down to the hardware, right? I know to program in c, c++ and java. But after all these years I am still not sure about what is happening inside. I would be grateful to anyone who points me to to a link or a video that explains this to the deep.

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  • What Design Pattern is seperating transform converters

    - by RevMoon
    For converting a Java object model into XML I am using the following design: For different types of objects (e.g. primitive types, collections, null, etc.) I define each its own converter, which acts appropriate with respect to the given type. This way it can easily extended without adding code to a huge if-else-then construct. The converters are chosen by a method which tests whether the object is convertable at all and by using a priority ordering. The priority ordering is important so let's say a List is not converted by the POJO converter, even though it is convertable as such it would be more appropriate to use the collection converter. What design pattern is that? I can only think of a similarity to the command pattern.

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  • Earliest use of Comments as Semantically Meaningful Things in a Program?

    - by Alan Storm
    In certain corners of the PHP meta-programming world, it's become fashionable to use PHPDoc comments as a mechanism for providing semantically meaningful information to a program. That is, other code will parse the doc blocks and do something significant with the information encoded in those comments. Doctrine's annotations and code generation are an example of this. What's the earliest (or some early) use of this technique? I have vague memories of some early java Design by Contract implementations doing similar things, but I'm not sure of those folks were inventing the technique, or if they got it from somewhere. Mainly asking so I can provide some historical context for PHP developers who haven't come across the technique before, and are distrustful of it because it seems a little crazy pants.

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  • Advice Required Regarding Creating a Self Learning, Self Organizing Programming Team....

    - by tGilani
    Hello I'm a senior student at my university and chairperson of IEEE Student Branch there. Recently I was thinking of some idea to acquaint students with the professional environment, how software is produced in the industry and get a practical experience.. Obviously trips to software houses are not enough and we cannot provide this many internships. So the idea of simulating a software house within the university popped in. Resources at my disposal are students with their own laptops, university UPS and lan network with internet access, and a reasonably sized room with a whiteboard and three hours free time daily.. :) However, I have absolutely no idea where to begin with. Milestones or whatever it may be called, are Requirements Document generation, sharing of resources, delegation of tasks, version controlling etc... I'd really appreciate some advice, programming tools (for JAVA), communication tools etc and other things used in a decent software house... Technologies to be targeted shall be random possibly starting with J2EE Spring Hibernate and Later Visual Programming in .NET C# and ASP.NET MVC as well as Android or iPhone development....

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  • Entry level developer career advice [closed]

    - by Evan
    I just got done with college and I have a full time job with a large software company that I have been an intern at for over a year. As an intern I was on the web team doing lots of architecture and developing UI in ExtJS and some Java backend experience. Now as a full time employee I am mainly doing ExtJS applications, which I enjoy a lot, and I want to stay in the web development field, but: Am I limiting my career options with just doing ExtJS stuff? Will experience in ExtJS help or hinder my programming skills? Will I be looked down upon because I'm only gaining experienced with ExtJS?

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  • Largest successful JavaScript project? [closed]

    - by 80x24 console
    A common theme in the GWT community is "I wouldn't want to build a project of THAT size using a pure JavaScript library!" What is the largest project that you have successfully delivered with frontend functionality written in JavaScript? (not Java or GWT) Please provide at least a hand-wavy SLOC estimate of the unique JS code (not including libraries, frameworks, toolkits, test code, generated code, server-side processing such as PHP, etc.) that was in the finished product. Note to GWT advocates: Please read the question carefully before answering. I've heard plenty of stories about JS failures and GWT successes, but I'd like to hear some quantified JS successes. Note to mods: This is primarily a business-of-software question, not a tools question. It factors into a real-world business decision.

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  • Ways to find a tutor for 1st year University student

    - by Craig H
    I tried searching here (and SO) without much luck. I also stared at the yellow box to the right and think this question is relatively on topic and can be answered. A co-worker asked me if I had any suggestions for how to find a tutor for his son. In this specific case, it was for Eclipse and Java, but it got me thinking about good general strategies one could use in situations like this. He preferred a local 1-to-1, but I suppose online might be a reasonable (or perhaps more likely) alternative. Any suggested strategies?

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  • Creating a new variable versus assigning an existing one

    - by rwallace
    Which is more common, creating a new variable versus assigning an existing variable (field, array element etc - anything that syntactically uses the assignment operator)? The reason I ask is that I'm designing a new language, and wondering which of these two operations should get the shorter syntax. It's not intended to be a pure functional language, or the question wouldn't arise, so I'd ideally like to count usage across large existing code bases in procedural and object-oriented languages like C, C++ and Java, though as far as I can see there isn't an easy way to do this automatically, and going by memory and eyeball, neither is obviously more common than the other.

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  • C# on ubuntu 12.04

    - by Deus Deceit
    Is C# a good choice for ubuntu programming? E.g unity, or applications that will run on ubuntu? Am I doing good wanting to learn C# when I'm determined to stick with ubuntu and develop on it or for it? If not, can you give me reasons why? And which languages would be better than c# for ubuntu development? I already know c, c++, java(basics), php, mysql, python(basics). I like to learn new stuff, but stuff that worth my time. Does C# worth my time? If c# worth my time, here's what I have done and what I need: I installed all mono packages I could find on the ubuntu standard repositories. Now I want a good tutorial to get me started. I'm a complete noob with c# so a basic tutorial and how to compile run under ubuntu 12.04 would be great.

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  • Why are there different programming languages [closed]

    - by Velizar Hristov
    I'm not asking about the usefulness of the languages that do exist already: I already know, and agree, that different languages are better for different purposes. However, why don't they just have a single language that can do it all? Why, when C# was created, they didn't keep everything from C and C++ and just add a few things, so that it can be used as both a low-level and high-level language? I see no harm in adding all kinds of commands to a single language that would allow it to be good for everything, and even eliminate the need for all other languages. Someone from another thread said that if there's a flaw in a certain language, its successor might not have it. However, why don't we just update that language to remove the flaw, and/or add anything that's missing? Arrays are different in Java and C#, but why not have them both, just use different commands for them? And so on...

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  • Isn't class scope purely for organization?

    - by Di-0xide
    Isn't scope just a way to organize classes, preventing outside code from accessing certain things you don't want accessed? More specifically, is there any functional gain to having public, protected, or private-scoped methods? Is there any advantage to classifying method/property scope rather than to, say, just public-ize everything? My presumption says no simply because, in binary code, there is no sense of scope (other than r/w/e, which isn't really scope at all, but rather global permissions for a block of memory). Is this correct? What about in languages like Java and C#[.NET]?

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  • Oracle Enterprise Manager Cloud Control 12c Release 2 (12.1.0.2) ist da!

    - by Ralf Durben (DBA Community)
    Das zweite Release von Oracle Enterprise Manager Cloud Control 12c ist jetzt verfügbar und zwar für alle Plattformen, auf denen auch das Vorgängerrelease genutzt werden konnte. Das gab es bei Enterprise Manager noch nie: Alle Plattformen haben die gleiche Priorität! In dem neuen Release wurde die Stabilität nochmals verbessert und einige Wünsche unserer Kunden verwirklicht. Auch einige neue Funktionalitäten, wie zum Beispiel "Java as a Service" stehen nun zur Verfügung. Neben dem Cloud Control Framework wurden auch einige Plug-Ins erneuert. Cloud Control 12.1.0.2 ist ein komplettes Release und der Download enthält alles für die Installation des OMS und Agenten. Damit kann mit der Software eine komplette Neuinstallation oder ein Upgrade von EM 10.2.0.5, 11.1 oder 12.1.0.1 (auch ohne Bundle Patch 1) vorgenommen werden. Eine Übersicht über die Neuerungen finden Sie im Oracle Enterprise Manager Cloud Control Introduction Document.

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  • Jaroslav Tulach's Report on NetBeans at OSGiCon

    - by Geertjan
    The latest NetBeans Podcast was recorded over the last few weeks and released yesterday. Aside from the NetBeans news items and interviews (interesting stuff about Joel Murach's new Java book using NetBeans, as well as the new developments in the NetBeans Groovy editor), there is, as always an "API Design Tip" of the podcast. That's really worth listening to, always of course, but especially this time because here Jaroslav Tulach talks at some length about his recent trip to OSGiCon, as well as the history and status of OSGi support in NetBeans IDE. Start listening from just before the 30th minute (i.e., the final segment) if you're interested in this particular topic: https://blogs.oracle.com/nbpodcast/entry/netbeans_podcast_60 For example, hear about how JDeveloper got faster by switching from Equinox to Netbinox. And... will Eclipse find itself on the same OSGi container too?

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  • How to test 3d acceleration?

    - by HappyDeveloper
    I want to install and test 3d acceleration in Ubuntu 12. I have read these pages: https://help.ubuntu.com/community/RadeonDriver https://wiki.ubuntu.com/X/Troubleshooting/VideoDriverDetection?action=show&redirect=X%2FTroubleshooting%2FFglrxInteferesWithRadeonDriver#Problem:_Need_to_purge_-fglrx I think I have installed it correctly, but I don't know how to test it. I tried to play minecraft in the browser, but I got a black screen. It may be a java problem too, so I need to troubleshoot. So how can I test my video card and drivers?

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  • Highlighting new rows in ADF Table

    - by Sireesha Pinninti
    About This article explains how to hightlight newly inserted rows in an ADF Table without writing any extra java/javascript code.IntroductionSometimes we may wish to give more clarification to the end user by differentiating between newly inserted rows and the existing rows(i.e the rows from DB) in a table by highlighting new rows in different color as in the figure shown below. SolutionWe can achieve the same by giving following EL to inlineStyle property of every column inside af:table: #{row.row.entities[0].entityState == 0?'background-color:#307D7E;':''}ExplanationHere is the explanation for row.row.entities[0].entityState given inside EL which returns the state of the row(i.e, New, Modified, Unmodified, Initialized etc.)row - Refers to a tree node binding(instance of FacesCtrlHierNodeBinding) at runtimerow.row - Refers to an instance of row that the tree node is based onrow.row.entities[0] - Gets the Entity row at zeroth index. In most of the cases, the table will be based on single entity. If your table is based on multiple entities then the index needs to be given accordingly.row.row.entities[0].entityState - Gets Entity Object's current Entity-state in the transaction.(0 - New, Modified - 2, Unmodified - 1, Initialized - -1,  etc.,)

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