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• calling methods if previous call success

  - by New Developer

  I my c# program I have to perform 5 steps(tasks) sequentially. basically these five should execute one after the other only the previous task performed is success. Currently I have done it in following style. But this is not very good code style to follow. var isSuccess=false; isSuccess=a.method1(); if(isSuccess) isSuccess=a.method2(); if(isSuccess) isSuccess=a.method3(); if(isSuccess) isSuccess=a.method4(); if(isSuccess) isSuccess=a.method5(); How can I re factor this code. What is the best way I can follow?

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• Any recommended books/resources on component-based design?

  - by user1163640

  I come from a background with heavy use of the classical object-oriented paradigm for software development. The company I am a part of switched to Unity not too long ago, and we're all very excited to get started using it However, one aspect that have sparked my interested, and which I think will become a very important part of our future development, is Unity's approach to component-based design with scripting; with less focus on typical hierarchical aspect. Question I was wondering if anyone could recommend any good books on this subject? I have had trouble finding any books or books with reliable reviews, and was wondering if anyone more experienced here had something to say on the issue? Any other kind of resource would be excellent too, I'm just interested in getting to learn everything I can about it. This is not meant as a discussion about best books or resources on the topic, but simply a question regarding any resources that any of you find useful. Thank you all for your time!

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• Learning Java for electrical engineering [closed]

  - by MohdAziz

  I'm an electrical engineering student ( Power, control & instrumentation). 2 months ago I started learning C, and I found programming something really enjoyable and I'd like to continue learning C and few other programming languages along with my electrical engineering degree. So my university is offering an extensive Java Oracle course for 7 days (like 5-6 hours a day) for a really decent price, do you think as an electrical engineer this would help me in my future career? What are the benefits of learning Java for an electrical engineer of my specialization? Do you think it's a good idea for someone in my case to take such an extensive course? I'm hardworker and I really enjoy these things, so I don't think that would be a problem for me.

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• Still no wireless after b43 with Dell Inspiron 1525 (Ubuntu 12.04)

  - by DanielleN

  So I followed the instructions here http://ubuntuforums.org/showthread.php?t=1974006 about how to solve this issue. It worked for a bit and then stopped. After doing a modprobe I could at least see my network and click on it but it would not connect (I can always see it if I look under the listed wireless networks under VPN Connections, however). I'm thinking, from what I read at least, the issue might be that my wireless switch was on during those first steps. Do I now have to undo the b43 install and do it again? Or is there something else I could try? I just made the switch to Linux yesterday, so I am hesitant at this point to mess with anything on my own. I should note now that it was installed by someone who knows what they are doing, so we are all good on that front.

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• Best Practice to return responses from service

  - by A9S6

  I am writing a SOAP based ASP.NET Web Service having a number of methods to deal with Client objects. e.g: int AddClient(Client c) = returns Client ID when successful List GetClients() Client GetClientInfo(int clientId) In the above methods, the return value/object for each method corresponds to the "all good" scenario i.e. A client Id will be returned if AddClient was successful or a List< of Client objects will be returned by GetClients. But what if an error occurs, how do I convey the error message to the caller? I was thinking of having a Response class: Response { StatusCode, StatusMessage, Details } where Details will hold the actual response but in that case the caller will have to cast the response every time. What are your views on the above? Is there a better solution? ---------- UPDATED ----------- Is there something new in WCF for the above? What difference will it make If I change the ASP.NET Web Service to a WCF Service?

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• Is there an open source solution that I can host on a web server that will allow users to anonymously upload a file to me?

  - by mjn12

  I'm looking for some kind of web application I can host on my Linux web server that will allow users to upload files of arbitrary size to me from their browser without requiring them to log in. Ideally this application would allow me to generate a link to my website that allowed for a one-time use upload. It might contain a unique, random key that was only good for that session. I could email them the link, they click it and are taken to a page where they can upload their file to me. I'm mainly targeting friends and family that need to send me files that are too large for email. I don't want to require them to install anything (dropbox), sign up and log in, etc. I'm definitely not teaching them to use FTP. This wouldn't be a difficult project for me to roll on my own but I'd like to take something off the shelf if it is possible. Does anything like this exist that my google-foo isn't turning up?

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• Factory for arrays of objects in python

  - by Vorac

  Ok, the title might be a little misleading. I have a Window class that draws widgets inside itself in the constructor. The widgets are all of the same type. So I pass a list of dictionaries, which contain the parameters for each widget. This works quite nicely, but I am worried that the interface to callers is obfuscated. That is, in order to use Window, one has to study the class, construct a correct list of dictionaries, and then call the constructor with only one parameter - widgets_params. Is this good or bad design? What alternatives does the python syntax provide?

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• OpenGL ES 2.0. Sprite Sheet Animation

  - by Project Dumbo Dev

  I've found a bunch of tutorials on how to make this work on Open GL 1 & 1.1 but I can't find it for 2.0. I would work it out by loading the texture and use a matrix on the vertex shader to move through the sprite sheet. I'm looking for the most efficient way to do it. I've read that when you do the thing I'm proposing you are constantly changing the VBO's and that that is not good. Edit: Been doing some research myself. Came upon this two Updating Texture and referring to the one before PBO's. I can't use PBO's since i'm using ES version of OpenGL so I suppose the best way is to make FBO's but, what I still don't get, is if I should create a Sprite atlas/batch and make a FBO/loadtexture for each frame of if I should load every frame into the buffer and change just de texture directions.

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• Getting weather information (from a thermometer and a hygrometer)

  - by EKS

  I have decided, as a arrogant geek, to build my own home ventilation and heating system, and will try to do this as my little project. I have always been annoyed with the lack of good ventilation systems at work, so I accept building my own is arrogant. Does anyone know about a device I can interact with that allows me to get temperature and humidity that I can interact with using C#? I cannot get it from the Internet because I need to get the humidity from my server "room", so I can control the dehumidifier there. Similar with temperature, outside is not that important. It would be a huge plus if the sensors had some sort of wireless access.

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• How to improve workflow between developer and designer with Expression Blend?

  - by Amenti

  We use WPF and Expression Blend 4. I'm trying to improve our workflow by tutoring one of our designers to use it for styling and animation. Slowly but surely I get the impression Blend in itself is to technical for the designer in question. I myself use it only occasionally (it's great for Visual States for instance) because a lot of things are easier done in code or not possible at all in Blend alone. It seems a developer with design experience is a lot more productive with it than a sole designer. Are there any good online resources or advice you could give me how to improve this situation?

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• Validation and Verification explanation (Boehm) - I cannot understand its point

  - by user970696

  Hopefully my last thread about V&V as I found the B.Boehm is text which I just do not understand well (likely my technical English is not that good). http://csse.usc.edu/csse/TECHRPTS/1979/usccse79-501/usccse79-501.pdf Basically he says that verification is about checking that products derived from requirements baseline must correspond to it and that deviation leads only to changes in these derived products (design, code). But he says it begins with design and ends with acceptance tests (you can check the V model inside). The thing is, I have accepted ISO12207 in terms of all testing is validation, yet it does not make any sense here. In order to be sure the product complies with requirements (acceptance test) I need to test it. Also it says that validation problems means that requirements are bad and needs to be changed - which does not happen with testing that testers do, who just checks correspondence with requirements.

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• Jersey 2.0 Milestone 2 Now Available

  - by arungupta

  Jersey 2.0 milestone 2 is now available. It builds upon the first milestone and adds several new features such as server-side asynchronous processing, server-side content negotiation, improved JAX-RS parameter injection, and several others. The REST endpoints can be published on Java SE HTTP Server, Grizzly 2 HTTP container, and some basic Servlet-based deployments. It also provides HTTPURLConnection-based client API implementation. Read about these and more about what's new in Marek's detailed post. Of course this is also the future reference implementation for JAX-RS 2.0. Feel like trying it out? Simply go to Maven Central (of course none of this is production quality at this point). The latest JAX-RS Javadocs and Jersey 2.0 API docs are good starting points to explore. And provide them feedback at [email protected].

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• How to organize my 1000s of PDF?

  - by mmb

  I have a huge collection of PDF. Mostly it consists of research papers, of self-created documents but also of scanned documents. Right now I drop them all in one folder and give them precise names with tags in the filename. But even that gets impractical, so I am looking for a PDF library management application. I am thinking of something like Yep for Mac, with the following features: PDF cover browsing (with large preview, larger than Nautilus allows) tagging of PDF (data should be readable cross-platform) possibility to share across network (thus rather flat files than database) if possible: cross-platform Mendeley seemed to be a good choice, but I am not only having academic papers and don't want to fill it all metadata that is required there. The only alternative I could find thus far is Shoka, but the features are limited and developments seems to have stopped already.

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• Why isn't functional language syntax more close to human language?

  - by JohnDoDo

  I'm interested in functional programming and decided to get head to head with Haskell. My head hurts... but I'll eventually get it... I have one curiosity though, why is the syntax so cryptic (in lack of another word)? Is there a reason why it isn't more expressive, more close to human language? I understand that FP is good at modelling mathematical concepts and it borrowed some of it's concise means of expression, but still it's not math... it's a language.

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• Java EE@NYC Java Meetup

  - by reza_rahman

  On November 19th, I spoke at the New York City Java Meetup Group. It's a well-organized group led by my good friends Dario Laverde and Timothy Fagan - I have spoken there numerous times. I did my Java EE 7 talk (the same one from Java2Days 2012). JavaEE.Next(): Java EE 7, 8, and Beyond from reza_rahman The talk went very well -- the official RSVP shows 163 attended. I gave away a few GlassFish T-shirts, laptop stickers and Arun Gupta's Java EE 6 pocket guide. More details on the talk here. I most certainly look forward to speaking there again.

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• Starting with JMF

  - by Fasih Khatib

  I have recently downloaded JMF and don;t know where to start. Most online resources begin directly with programming and give no background of the JMF classes what so ever. So, I was planning on using a book or something that would give me ground-up knowledge of JMF. However, the books available on Amazon are of 1980's and 1990's. Can you please suggest any good books or references? Books preferred. Note: There was this one 2011 book available that was a print-on-demand collection of wikipedia articles on JMF but I decided not to opt for it because wikipedia articles should not be sold for money

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• Is there an OSS license that works for this:

  - by mattcodes

  Say you started as SaaS service with freemium business model such 37Signals - Basecamp or Dropbox etc.. Is there an OSS license that says that you can use the source code etc.. but you cant release a SaaS based on it, esssentially released in good faith with non-compete expectations. e.g. if 37Signals released the source for highrise, basecamp etc.. someone could start 37signals4lesss.com (albeit once they built the same bit of provisioning logic) and damage the core business model.

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• the problem i have now visual studio team know.

  - by anirudha

  once upon a time i have a problem in visual studio that i declare here. they never thing what i want to say and i can't tell them clearly as they want. today i got the mail from visual studio 2010 connect that they tell me " problem can be solved in future version" that's a good thing i feel something better because anyone can't believes but i tell them many time. atleast they hear what i want to say. but i never believe on them even before that i get the new version of visual studio. means may be believe possible after the new version. because i know that they are slow slow and slow. last time i found that they tell that they launch visual studio on 20 march  but atleast they launched them on 12 april as adobe lauch their other product in creative series the link for connect is here

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• how do you spend your day? a day from a programmer's life [closed]

  - by RBA

  First of all I'm 26 and I'm asking this question because I want to see how do you manage your time. Also I'm interested how do the programmers with a family(wife, several kids) manage their time. I'm asking this due the fact that I'm working aprox 7,5 hours at work (9 to 5), spent 1,5 hours on the way to/from workplace, and when I'm home I must cook/clean/etc and LEARN! And I have the impression that I don't have enough time to learn. Did you have a period similar in your life? To want to learn another language/improve your development/other skills? I saw here and on SO that there are a lot of peoples with +10k points, this in my mind means that they stay on blogs/forums more than 15 hours a day. If you consider this question is a good question, please vote to reopen it. best regards, Radu

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• Suggestions to Purchase a System76 Ubuntu Pre-Installed Laptop

  - by user2956795

  I am looking to buy a new laptop that well supports Ubuntu, and recently came across the Ubuntu laptop manufactured by System76. I am not familiar with this brand although it seems to me they produce Ubuntu laptop with good performance. The price listed on their website is also not that expensive as compared with a MacBook Pro, or ThinkPad T series, or the Dell XPS Developer Edition Has anyone used System76 Ubuntu Laptop? I'd like to ask for your opinions. How is the experience. Is it worth to put the money on?

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• Build automation: Is it usual to use QMake for non-Qt projects?

  - by Raphael

  So, I'm planning to write a C++ library and I want it to be cross-platform, and as this library won't deal with UI and I want it to have as little dependencies as possible, I won't be using Qt (actually Qt won't really help me to achieve what I want, all I plan on using is STL and Boost). Now when it comes to build a cross-platform project, I really like QMake as it's extremely easy to use and I have experience with it. I also heard good things about CMake, though I really doubt it's as easy to use as QMake. Anyway, here is my question: Should I stick with build automation tool that I know or is QMake just out of context for a non-Qt project? Should I take this as an opportunity to learn CMake? Or is there a better alternative to these two?

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• Where to get ads for my website ?

  - by Divyanshu Negi

  I am the developer of the website named viewloud Now as my website is getting around 100 visitors per day so i was thinking that i should put some ads on my website but it is really very hard to find the best advertising plan which can benefit me the most. Google adsence . Is it a good choice ? Will google adsence allow me to open a account there with such little traffic on my website. ? Please help from last two months i have done a very hard work to bring such tarffic :p i know it is very less but i am still working on it .. so please help me guys. Thank you Divyanshu

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• Unit testing a text index

  - by jplot

  Consider a text index such as a suffix tree or a suffix array supporting Count queries (number of occurrences of a pattern) and Locate queries (the positions of all the occurrences of a pattern) over a given text. How would you go about unit testing such a class ? What I have in mind is to generate a big random string then extract a random substring from this big string and compare the results of both queries with naive implementations (such as string::find). Another idea I have is to find the most frequent substring of length l appearing in the original string (using perhaps a naive method) and use these substrings for testing the index. This isn't the best way, so what would be a good design of the unit tests for a text index ? In case it matters, this is in C++ using google test.

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• C++ Game Engine Book/Tutorial/Anything recent?

  - by TheNoob

  Before I get flamed, please understand that I have been looking for a while now. Yes, I have found a good amount of game engine tutorials...except filled with errors, out of date syntax, missing crucial information, and so on. Is there anywhere with a recent tutorial, or a book, anything at all? I'm not asking for an opinion in graphics API's, just a point in the right direction to get started on game engine development. I just want to make it clear, I have googled/stacked like crazy. Any help appreciated. Thank you.

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• How to copy files via terminal?

  - by Levan

  This might sound silly for some people but I'm new to Linux and don't know how to use it as good as other people, yes I rad about copying files with terminal but these examples will help me a lot. So here is what I want to do: Examples: I have a file in /home/levan/kdenlive untitelds.mpg and I want to copy this file to /media/sda3/SkyDrive and do not want to delete any thing in SkyDrive directory. I have a file in /media/sda3/SkyDrive untitelds.mpg and I want to copy this file to /home/levan/kdenlive and do not want to delete any thing in kdenlive directory I want to copy a folder from home directory to sda3 and do not want to delete any thing on sda3 directory and opposite I want to cut a folder/file and copy to other place without deleting files in that directory I cut it into.

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