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• What is the worst software bug in history? [closed]

  - by Amir Rezaei

  By having for example money and human suffering as the metric. What is the worst software bug in history? Note this is a specific question. Last month automaker Toyota announced a recall of 160,000 of its Prius hybrid vehicles following reports of vehicle warning lights illuminating for no reason, and cars' gasoline engines stalling unexpectedly. But unlike the large-scale auto recalls of years past, the root of the Prius issue wasn't a hardware problem -- it was a programming error in the smart car's embedded code. The Prius had a software bug.

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• Comparing the Performance of Visual Studio&apos;s Web Reference to a Custom Class

  As developers, we all make assumptions when programming. Perhaps the biggest assumption we make is that those libraries and tools that ship with the .NET Framework are the best way to accomplish a given task. For example, most developers assume that using <a href="http://www.4guysfromrolla.com/articles/120705-1.aspx">ASP.NET's Membership system</a> is the best way to manage user accounts in a website (rather than rolling your own user account store). Similarly, creating a Web Reference to communicate with a <a href="http://www.4guysfromrolla.com/articles/100803-1.aspx">web service</a> generates markup that auto-creates a <i>proxy class</i>, which handles the low-level details of invoking the web service, serializing parameters,

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• Concept behind SHA-1 Checksum

  - by Vishwas Gagrani

  What's the basis behind SHA-1 or SHA-2 or other Checksum algorithms? I read about it here http://en.wikipedia.org/wiki/SHA-1#Data_Integrity But I am still wondering about an answer in a layman's language. Can I understand it as a very, very compressed code that can be translated back into original data? Let's say, I have a letter written in notepad. Then the whole of my 1 A4 page size data can be converted into something like this "9b90417b6a186b6f314f0b679f439c89a3b0cdf5". So whenever I want my original data back, I can convert this back into original data? I am very sure that I am wrong here, because it is weird how data that itself contains combination of letters and numbers can be represented by smaller set of letters and numbers. Illogical! Then, what's the basic?

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• How much code do you write everyday, *at work*?

  - by Aerovistae

  I'm graduating college, about to start a junior software engineering position, and I've been wondering how much I'm going to be expected to do on what kind of timeline. I mean, in python I can write maybe 500 lines in 8 hours. In C, maybe 200 lines in 8 hours. And that's a big maybe. (I'm f#$*ing terrible with C.) Other languages are somewhere in between. I don't even know if that's ridiculously slow or normal or even good, hence the question. How much code do you write a day? It would be helpful to specify what language/technology you're using, and to make note if there are big differences between them like with myself.

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• Is it possible to give an animated GIF a transparent background?

  - by Phil

  I'm making a Fire Emblem-esque game. There are very cute 2D frames I made for each character, and, like a game like Fire Emblem, I want these characters to animate constantly. To circumvent the graphics programming involved I came up with a novel idea! I would make each character an animated gif, and only in special conditions ever halt their constant movement - in that case just change what image is being displayed. Simple enough. But I have a dilemma - I want the background of my .gifs to be transparent (so that the "grass" behind each character naturally shows, as per the screenshot - which has them as still images with transparent backgrounds). I know how to make a background transparent in numerous tools (GIMP, Photoshop). But it seems every .gif creator replaces the transparent background with something and I can't edit it back to transparent. Is it possible to have a .gif with a transparent "background"? Perhaps my knowledge of file formats is limiting me here.

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• When should code favour optimization over readability and ease-of-use?

  - by jmlane

  I am in the process of designing a small library, where one of my design goals is that the API should be as close to the domain language as possible. While working on the design, I've noticed that there are some cases in the code where a more intuitive, readable attribute/method call requires some functionally unnecessary encapsulation. Since the final product will not necessarily require high performance, I am unconcerned about making the decision to favour ease-of-use in my current project over the most efficient implementation of the code in question. I know not to assume readability and ease-of-use are paramount in all expected use-cases, such as when performance is required. I would like to know if there are more general reasons that argue for a design preferring more efficient implementations—even if only marginally so?

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• Creating a portfolio of projects [closed]

  - by Ryan

  As I pursue the path of becoming a programmer, I would like to build up a portfolio of projects I worked on at my current job so that I can eventually get programming work elsewhere (either as an employee, contractor, one man consulting shop, etc). Some of these were things I coded myself, others I was instrumental in the architecture, design and functionality (ie, not as a programmer but more of a BA). How do I show the work that I have done to others on the projects that I have produced for the company I work at? This is all internal software, so it's not something that the outside world would be able to use, and some of our products contain proprietary financial market tools and it would not be prudent to share those with the outside world. My guess is that screenshots would definitely be out of the question, as well as functional descriptions of the software.

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• What Book-Library Organizing Programs are available?

  - by el10780

  I would like to ask if there is any good program for ubuntu 12.04 to organize a library of books.I want to mention that I also have books written in my native language (Greek) and I have books written in other languages like English,French, etc too .So basically I need an application which can fetch information from databases for Greek books. For example - Adding a Greek (ISBN) book database source and when I type the ISBN of the book in the program ,it should find the book from that databases. Is this possible? I already tried Tellico and GCstar but they were unable to find books with Greek ISBN .I tried to add a Greek book source but it wasn't successful.

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• EXADATA & GoldenGate - the perfect combination for thetrainline.com

  - by maria costanzo

  enhanced the customer experience sustaining rapid search and booking times for hundreds of millions of journey requests per annum EXADATA & GoldenGate : the perfect combination thetrainline.com used Oracle GoldenGate to migrate data from its legacy system to two  Oracle Exadata Database Machine X2-2 HC Quarter Rack instances to reduce downtime, avoid  risk of data loss, and eliminate the need for complex programming. "Oracle GoldenGate enabled us to complete the migration of three terabytes to Oracle Exadata, within a single 30-minute system outage,” East said. "Without Oracle GoldenGate, we would have required a 20 hour outage window to complete the migration, something that was completely unacceptable."  Discover more at the following link  

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• How are larger games organized?

  - by Matthew G.

  I'm using Java, but the language I'm using here is probably irrelevant. I'd like to create an economy based on an ancient civilization. I'm not sure how to design it. If I were working on a smaller game, like a copy of "Space Invaders", I'd have no problem structuring it like this. Game -Main Control Class --Graphics Class --Player Class --Enemy class I'd pass the graphics class to both the player and enemy class so they could call graphics functions. I don't understand how I'd do this for larger projects. Do I create a country class that contains a bunch of towns? Do the towns contain a lot building class, most contain classes of people? Do I make a path finding class that the player can access to get around? How exactly do I structure this and pass all these references around? Thanks.

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• Google I/O 2012 - YouTube Channels: Get with the Program!

  Google I/O 2012 - YouTube Channels: Get with the Program! Dror Shimshowitz, AJ Crane YouTube allows anyone to distribute videos to 800m web, mobile and TV viewers around the world. Come learn how to leverage this powerful platform to build an audience and market your products. We'll walk you through tips and techniques for building, programming, and promoting your very own YouTube channel. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 0 0 ratings Time: 53:11 More in Science & Technology

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• LL(8) and left-recursion

  - by Peregring-lk

  I want to understand the relation between LL/LR grammars and the left-recursion problem (for any question I know parcially the answer, but I ask them as I don't know nothing, because I am a little confused now, and prefer complete answers) I'm happy with sintetized or short and direct answers (or just links solving it unambiguously): What type of language isn't LL(8) languages? LL(K) and LL(8) have problems with left-recursion? Or only LL(k) parsers? LALR(1) parser have troubles with left or right recursion? What type of troubles? Only in terms of the LL/LALR comparision. What is better, Bison (LALR(1)) or Boost.Spirit (LL(8))? (Let's suppose other features of them are irrelevant in this question) Why GCC use a (hand-made) LL(8) parser? Only for the "handling-error" problem?

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• Help me learn to program with humility?

  - by Darknight

  I wanted to ask this question, so that I can come back to it and it serve as a constant reminder for me. Through out my life, I've had milestones where I've sat down and really self evaluate myself. Every-time I've found something negative I've strived to put it right. One of those negatives is pride or arrogance. Sadly the nature of programming has plenty of fuel to endlessly fills ones own ego. Please can you give me words of wisdom that can serve as a reminder for me to "eat humble pie" I want to keep my arrogance in check even if that arrogance is a sand grains weight.

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• Security Alert for CVE-2011-5035 Updated

  - by Eric P. Maurice

  Hi, this is Eric Maurice again.  Oracle has just updated the Security Alert for CVE-2011-5035 to announce the availability of additional fixes for products that were affected by this vulnerability through their use of the WebLogic Server and Oracle Container for J2EE components.  As explained in a previous blog entry, a number of programming language implementations and web servers were found vulnerable to hash table collision attacks.  This vulnerability is typically remotely exploitable without authentication, i.e., it may be exploited over a network without the need for a username and password.  If successfully exploited, malicious attackers can use this vulnerability to create denial of service conditions against the targeted system. A complete list of affected products and their versions, as well as instructions on how to obtain the fixes, are listed on the Security Alert Advisory.  Oracle highly recommends that customers apply these fixes as soon as possible.

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• How difficult did you find the Java Certification Exam

  - by user22904

  I'm just starting out as a Java programmer and have very minimal experience. I would like to improve my knowledge and study for the Java certification. I realize everyone will have a different answer but for those who have taken the certification and passed it, I'd really appreciate if you could tell me your experiences. Just a couple of lines to let me know if you found it hard, very hard. Also how much time did you spend studying. Sorry that this is not a good question. My native language is not English so it is hard for me to say what I want to ask.

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• what knowledge would I need to make a good simulation games

  - by Skeith

  I have an idea for a game like theme park but don't know how simulation games are made. I am not some noob on his first game so I appreciated constructive answers instead of "its hard, don't do it". What I want is to know how simulation game mechanics are put together. I figure it would be heaver on the AI than normal games and not knowing much about AI would like to know some programming techniques I should look into for this style game. specific techniques please not just a book on ai. what sort of architecture would be used? I guess it would have some sort of probability engine with pre designed events that are triggered based on the AI state. Would it use a FSM or be purely event driven ? Any information on how a sims game functions would be cool.

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• Consultant in a firm that doesn't understand the tech!

  - by techsjs2012

  I got the job as a Consultant in a firm that has 3 other programmers. My job is to rewrite all the old system in Java, Spring etc but the staff programmers only know perl and the manager does not know any programming. I am trying to get them to understand that I have 6 projects to rewrite here but no one has design docs or spec. the staff programmers never had to write any documents. Plus I cant get the manager to understand the new java tech stuff.. he keeps asking some of the staff for views on things but the staff don't know it or understand it. Where do I go from here to make the manager understand that the staff programmers or someone has to write a design document so I know what to build. or if I have to write the documents how do I get the information?

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• Is it possible for a good programmer to have never used version control?

  - by lortabac

  I am looking for an expert programmer to help solve a difficult situation. The interviews so far have been surprisingly disappointing. The best candidate so far is a very experienced programmer who has never used version control software. The problem in itself might not be too serious because it is something which can be learned in a short time. But there is a deeper aspect, which worries me: How is it possible to actively develop software for 10-15 years without ever needing version control? Is the fact itself of not looking for a solution to the problem of tracking changes a sign of a wrong attitude to programming?

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• How can I obtain in-game data from Warcraft 3 from an external process?

  - by Slav

  I am implementing a behavior algorithm and would like to test it with my lovely Warcraft III game to watch how it will fight against real players. The problem I'm having is that I don't know how to obtain information about in-game state (units, structures, environment, etc.) from the running WC3 game. My algorithm needs access to the hard drive and possibly distributed computing, that's why JASS (WC3's editor language) isn't appropriate; I need to run my algorithm from a separate process. Direct3D hooking is an approach, but it wasn't done for WC3 yet and a significant drawback of that approach would be the inability to watch how the AI performs online, since it uses the viewport to issue commands. How I read in-game data from WC3 in a different process in a fastest and easiest way?

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• How do I install the driver for my Linksys AE1200 Wireless-N USB Adapter?

  - by Lewis Graham

  I recently downloaded Ubuntu from the main website with the hopes of dual booting it with Windows. While the operating system works, it says that I need to install a driver for my graphics card. When I type in my password the installation fails. I figure it is because I need Internet access. I tried to install my WiFi USB adapter with the installation disc but Ubuntu doesn't seem to run the setup when I click the exe. What are my available solutions as I would really like to use Ubuntu from my programming and Windows for my gaming needs? The name as read on the box is: Linksys AE1200 Wireless- N USB Adapter The description reads as such: ID 13b1:0039 Linksys (a comma messed up format) ID 046d:0a0b Logitech, Inc. ClearChat Pro USB (headset)

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• Free LINQPad is a great way to learn LINQ!

  - by CatherineRussell

  LINQPad is a great way to learn LINQ: it comes loaded with 500 examples from the book, C# 4.0 in a Nutshell.  There's no better way to experience the coolness of LINQ and functional programming. LINQPad is more than just a LINQ tool: it's an ergonomic C#/VB scratchpad that instantly executes any C#/VB expression, statement block or program with rich output formatting – the ultimate in dynamic development. Put an end to those hundreds of Visual Studio Console projects cluttering your source folder! Best of all, LINQPad standard edition is free and can run without installation (or with a low-impact setup). The executable is 3MB and is self-updating. To get it, go to: http://www.linqpad.net/

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• The Digital Video Recorder (DVR) is old news, the IP TV is the new generation.

  Its been more than 10 years since the first DVR came out in the US, the idea that you wont be wasting time by programming your video to record a show. Tivo was the first company to bring the idea of a hard disk to store your programs as well as the recurring shows recorded. Its being more than 10 years since that technology advance that improved the live of many families, yet after 10 years the technology hasnt improved much besides all cable and satellite companies provide their own device without...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Who owns the code, who owns the algorithm, who owns the idea?

  - by Vorac

  This question got me thinking what products of the programming effort belong to the employer, and what don't. The two extremes are (0) the code - it apparently belongs to the employer and (1) the learned personal and technical skills. But what is in between? Who owns the pseudocode/algorithm? Who owns the general idea of the algorithm? Who owns the know-how that such an algorithm may serve some useful purpose (e.g. on this site questions are values, as well as answers)? Also: Who owns an idea on the web?

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• What to choose for beginner: PHP/Python/Ruby

  - by Nai

  I'm a beginner teaching myself to code but I would like he insight of the PSE community and helping choose where to start. My main objective is to be able to create a basic website to first test my business idea and from there iterate on it quickly to minimise my learning time. The most important criteria for me is speed. An example of speed would be pre-built components available open source and not having to write one from scratch. From my research, this seems to be a death match between the following languages and frameworks: PHP and CakePHP Python and Django Ruby and Rails Assumptions: I am going to be equally good (or bad) in all 3. It is going to be equally easy to find competent developers in either language. I know this to be false already by lets assume that it is. This question is not meant to karma whore as I've seen how passionate some of these standoff questions have been and I'll be happy to turn it into a community wiki.

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• building a website

  - by Ant

  A couple of my friends run a business and they asked me to build them a public website. It will only be used for information about the company with soe pictures. No transactions will be involved. Right now I work for a company where I build internal websites, and do alot of backend programming in C#. I understand html, css, jquery, etc. so I feel like I am completely capable of building a website for them. However, I do not know all the basic knowledge to building one. For example, where should we host the files, what type of security issues do I need to be aware of, what's the best software to use for developing websites (I use visual studio at work), where can I find some design techniques, etc. Any help is appreciated.

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