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• Using implode, explode etc.. on one line vs separating them into multiple lines with meaningful variable names

  - by zhenka

  I see a lot of people coding in PHP being rather proud if they manage to write a complicated one line statement that does clever things. But what is the advantage? It is not only harder to keep in once head while writing, but makes code much less readable. In my opinion reading short statements, if well written, can be like reading an essay, while complicated one liners can potentially make me pause and think for much longer then it would take for the coder to simply separate them into meaningful units. Am I wrong in thinking this? How would you go about proving your point to another programmer regarding this?

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• Using components with different permissive licenses in a commercial app. How to display copyright correctly?

  - by Ivaylo Slavov

  I am writing a commercial application that will make use of some open libraries licensed under different licenses. For example one library will be licensed under the Apache 2.0 license, another will use the LGPL license. Both licenses allow usage in commercial applications, but differ in the way the attributions of licensed work is given. It is my first commercial application that uses 3rd party libraries and I want to do the right thing so that the 3rd party licenses are satisfied. I am not only asking what I should do, but also what I must not do.

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• Problem when scaling game screen in Libgdx

  - by Nicolas Martel

  Currently, I'm able to scale the screen by applying this bit of code onto an OrthographicCamera Camera.setToOrtho(true, Gdx.graphics.getWidth() / 2, Gdx.graphics.getHeight() / 2); But something quite strange is happening with this solution, take a look at this picture of my game below Seems fine right? But upon further investigation, many components are rendered off by one pixels, and the tiles all are. Take a closer look I circled a couple of the errors. Note that the shadow of the warrior I circled appears fine for the other warriors. Also keep in mind that everything is rendered at pixel-perfect precision when I disable the scaling. I actually thought of a possible source for the problem as I'm writing this but I decided to still post this because I would assume somebody else might run into the same issue.

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• Problem with .sh file

  - by omgzor

  I don't have any experience writing .sh files. I want to run the pvm2raw utility of this app from the Volume Library. I get the following error when running build.sh in Ubuntu 10.10. build.sh is as follows: # make command set mmfile=V3Makefile set make="make -f $mmfile" set rule=$1 if ($rule == "") set rule="all" // line 16 if ($rule == "deps") then if ($HOSTTYPE == "iris4d") $make MAKEDEPEND="CC -M" OPTS="-DHAVE_CONFIG_H -DVIEWER_HAVE_DCMTK" TARGET=IRIX depend if ($HOSTTYPE == "i386") $make MAKEDEPEND="c++ -M -I/usr/X11R6/include" OPTS="-DHAVE_CONFIG_H -DVIEWER_HAVE_DCMTK" TARGET=LINUX depend What's wrong there? Edit: I followed kniwor's advice and installed csh. Now I get the following error: How can I solve this Undefined variable problem?

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• Adding unit tests to a legacy, plain C project

  - by Groo

  The title says it all. My company is reusing a legacy firmware project for a microcontroller device, written completely in plain C. There are parts which are obviously wrong and need changing, and coming from a C#/TDD background I don't like the idea of randomly refactoring stuff with no tests to assure us that functionality remains unchanged. Also, I've seen that hard to find bugs were introduced in many occasions through slightest changes (which is something which I believe would be fixed if regression testing was used). A lot of care needs to be taken to avoid these mistakes: it's hard to track a bunch of globals around the code. To summarize: How do you add unit tests to existing tightly coupled code before refactoring? What tools do you recommend? (less important, but still nice to know) I am not directly involved in writing this code (my responsibility is an app which will interact with the device in various ways), but it would be bad if good programming principles were left behind if there was a chance they could be used.

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• Is a finite state machine an appropriate solution for this situation?

  - by user1936

  I was writing some test code as an example where I had a washing machine class. It has a door state that should be open or closed, and also a running state, either on or off. I want to prevent the running state from changing from 'off' to 'on' when the door is 'open', and also prevent the door from being set to 'open' while the machine is 'on'. I have this functionality rigged up with a bunch of if statements. It feels inelegant and it could quickly turn into spaghetti code if I want to add another state that puts additional conditions on the changes of other states. I wonder, is a finite state machine a solution for this situation? Would it simplify adding states and defining valid transitions?

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• Can not update Natty running from a USB stick

  - by Ingo Gerth

  In a blogpost Jono explained a nice way to test the latest version of Natty. Under point four he proposes: Step 4: Update Although you installed the latest daily you should ensure it is up to date, and you can do this with: sudo apt-get update sudo apt-get upgrade Now, I followed all the steps and am actually writing this question from a session running on a 4GB USB stick. When trying to update the installation though (I just tried to do that using the Update Manager), it always fails because I do not have enough disc space remaining. How can I get Ubuntu to update properly on my USB stick?

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• Mount an external drive at boot time only if it is plugged in.

  - by Jeremy

  I've got an entry for an external harddrive in my fstab: UUID="680C0FE30C0FAAE0" /jgdata ntfs noatime,rw But sometimes this drive isn't plugged in at boot time. This leaves me half way through a boot, with a prompt to "Continue Waiting, press S or press M" but no keypress has any affect at this stage (including ctrl-alt-delete, not even caps-lock). Short of writing a script to check the output of fdisk -l, how can I mount this drive at boot time only if it is present? It would be handy to have an fdisk entry for this drive, so I can just type mount /jgdata instead of needing a device name.

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• The Enterprise Architect (EA) diary - day 22 (from business processes to implemented applications)

  - by nattYGUR

  After spending time on keeping our repository up to date (add new ETRM application and related data flows as well as changing databases to DB clusters), collecting more data for the root cause analysis and spending time for writing proposal to creating new software infrastructure team ( that will help us to clean the table from a pile of problems that just keep on growing due to BAU control over IT dev team resources). I spend time to adapt our EA tool to support a diagram flow from high level business processes to implementation of new applications that will better support the business process. http://www.theeagroup.net/ea/Default.aspx?tabid=1&newsType=ArticleView&articleId=195

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• Handling SMS/email convergence: how does a good business app do it?

  - by Tim Cooper

  I'm writing a school administration software package, but it strikes me that many developers will face this same issue: when communicating with users, should you use email or SMS or both, and should you treat them as fundamentally equivalent channels such that any message can get sent using any media, (with long and short forms of the message template obviously) or should different business functions be specifically tailored to each of the 3? This question got kicked off "StackOverflow" for being overly general, so I'm hoping it's not too general for this site - the answers will no doubt be subjective but "you don't need to write a whole book to answer the question". I'm particularly interested in people who have direct experience of having written comparable business applications. Sub-questions: Do I treat SMS as "moderately secure" and email as less secure? (I'm thinking about booking tokens for parent/teacher nights, permission slips for excursions, absence explanation notes - so high security is not a requirement for us, although medium security is) Is it annoying for users to receive the same message on multiple channels? Should we have a unified framework that reports on delivery or lack thereof of emails and SMS's?

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• Ruby - when to use instance variables vs parameters between methods?

  - by Michael Durrant

  I'm writing several methods that call other methods. To pass the information I have a couple of choices: Pass the information as parameters Set instance variables so that other methods can access them When should I choose one option over the other? It seems that the first option is good as it is very specific about what is being passed. the downside seems to be that a lot of values are being passed around. The second method doesn't require passing all the values around but seems to lead to a lot of magic where methods set instance variables 'somewhere' Should I always be very explicit about gets passed to other methods in the class? Are there exceptions so this?

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• Update live USB distro?

  - by qubex

  I have Lubuntu 14.04 (and Ubuntu 14.04) on a pair of USB disks created by writing the img files to USB using dd on Mac OS X. Unfortunately these systems both have some known bugs (that have since been corrected) and lack certain important drivers for my system (which I have located online). How can I make the USB disks writable and how do I update the distribution upon them as one may do for a locally-installed system? And if I later proceed to install from these USB sticks onto a hard-drive, will they ‘carry’ the package and driver updates with them or will I have to start from scratch again? (I seem to remember from my ancient Windows XP days that such procedures were referred to as ’slipstreaming’ or somesuch on that side of the fence.) (No, I did not create a persistence partition when I created the sticks, because from Mac clearly that isn’t an option. And anyway, as I imperfectly understand it, the persistence partition is for user files and not for the modification of the system.)

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• Test Driven Development Code Order

  - by Bobby Kostadinov

  I am developing my first project using test driven development. I am using Zend Framework and PHPUnit. Currently my project is at 100% code coverage but I am not sure I understand in what order I am supposed to write my code. Am I supposed to write my test FIRST with what my objects are expected to do or write my objects and then test them? Ive been working on completing a controller/model and then writing at test for it but I am not sure this is what TDD is about? Any advice? For example, I wrote my Auth plugin and my Auth controller and tested that they work properly in my browser, and then I sat down to write the tests for them, which proved that there were some logical errors in the code that did work in the browser.

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• CLI program to download album art

  - by John Baber

  I'd like to be able to do this: $ pwd /home/$USER/music/ripped_music/Monty_Python-Instant_Record_Collection $ ls 01.The_Executive_Intro.mp3 ... 16.The_Lumberjack_Song.mp3 $ mystery_command_or_script . $ ls 01.The_Executive_Intro.mp3 ... 16.The_Lumberjack_Song.mp3 album_cover.jpg $ Somewhere in the guts of Rhythmbox, totem, etc. this is being done. I'd like to be able to do it myself. I don't need help actually writing a script. I'd really just like to know if there's something like CDDB for album covers. (Scraping albumart.org is the current working solution.)

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• migrating product and team from startup race to quality development

  - by thevikas

  This is year 3 and product is selling good enough. Now we need to enforce good software development practices. The goal is to monitor incoming bug reports and reduce them, allow never ending features and get ready for scaling 10x. The phrases "test-driven-development" and "continuous-integration" are not even understood by the team cause they were all in the first 2 year product race. Tech team size is 5. The question is how to sell/convince team and management about TDD/unit testing/coding standards/documentation - with economics. train the team to do more than just feature coding and start writing test units along - which looks like more work, means needs more time! how to plan for creating units for all backlog production code

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• Shader inputs in a general purpouse engine

  - by dreta

  I'm not familiar with SDKs like Unity or UDK that much, so i can't check this off hand. Do general purpouse engines allow users to create custom uniform variables? The way i see it, and the way i have implemented it in an engine i'm writing to learn 3D, is that there is a "set" of uniforms provided by the engine and if you want to write a custom shader then you utilize uniforms you need to create a wanted effect. Now, the thing is, first of all i'm not an artist, second of all, i didn't have a chance to create complex scenes yet. So my question is, is it common practice to define variables that the engine provides and only allow the user to work with what they're given? Allowing users to add custom programs and use them where they want is not hard, but i have issues imagining how you'd go about doing the same for uniforms.

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• Seeking questions about creating Microsoft Live Labs Pivot collections

  - by John Conwell

  I've spent the past 3 weeks working a lot with Pivot from Microsoft Live Labs (http://getpivot.com/).  Pivot is a tool that allows you to visually explore data. Its an interesting take on visual data mining. Anyway, I've been writing a lot of code that creates a hierarchy of Pivot collections, where one item in the collection drills down into an entirly new collection. The dev community around Pivot is still very young, so there isnt much tribal knowledge built up yet.  I've spent a lot of time trying to get things to work through trial and error, as well as digging around in Reflector.  But I've finally got a framework built for programatically creating DeepZoom images, Pivot collections, Sparse Images, etc.   If anyone has any questions, or suggestions on a post topic, leave a comment and I'll try and answer your question.

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• Are the technologies used in an application part of the architecture, or do they represent implementation/detailed design details?

  - by m3th0dman

  When designing and writing documentation for a project an architecture needs to be clearly defined: what are the high-level modules of the system, what are their responsibilities, how do they communicate with each other, what protocols are used etc. But in this list, should the concrete technologies be specified or this is actually an implementation detail and need to be specified at a lower level? For example, consider a distributed application that has two modules which communicate asynchronously via AMQP protocol, mediated by a message broker. The fact that these modules use the Spring AMQP library for sending and receiving messages is a fact that needs to be specified in the architecture or is a lower-level detailed design/implementation detail?

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• Sprite/Tile Sheets Vs Single Textures

  - by Reanimation

  I'm making a race circuit which is constructed using various textures. To provide some background, I'm writing it in C++ and creating quads with OpenGL to which I assign a loaded .raw texture too. Currently I use 23 500px x 500px textures of which are all loaded and freed individually. I have now combined them all into a single sprite/tile sheet making it 3000 x 2000 pixels seems the number of textures/tiles I'm using is increasing. Now I'm wondering if it's more efficient to load them individually or write extra code to extract a certain tile from the sheet? Is it better to load the sheet, then extract 23 tiles and store them from one sheet, or load the sheet each time and crop it to the correct tile? There seems to be a number of way to implement it... Thanks in advance.

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• Tips or techniques to use when you don't know how to code something?

  - by janoChen

  I have a background as UI designer. And I realized that it is a bit hard for me to write a pieces of logic. Sometimes I get it right, but most of the time, I end up with something hacky (and it usually takes a lot of time). And is not that I don't like programming, in fact, I'm starting to like it as much as design. It's just that sometimes I think that I'm better at dealing with colors an shapes, rather than numbers and logic (but I want to change that). What I usually do is to search the solution on the Internet, copy the example, and insert it into my app (I know this is not a very good practice). I've heard that one tip was to write the logic in common English as comment before writing the actual code. What other tips and techniques I can use?

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• Exporting UV coords from Blender

  - by Soapy

  So I have searched on google and various other websites but I've not found an answer. The only ones I did find did not work. So my question is how do I get UV coords from blender (2.63)? Currently I'm writing my own custom file exporter, and so far have managed to export vertices and their normals. Is there a way to export the UV coords? N.B. I'm currently try to figure it out using a simple cube that is unwrapped and has a texture applied to it.

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• Do I have to write a lot of boilerplate code if I keep working using Java?

  - by edem

  I'm working for a company writing ERP applications. My problem is that I have to write tons of boilerplate code. I came up with ideas to automatize/prevent the drudgery but only some of them were accepted. I have been told by the lead developer that my ideas tend to be go far afield and I should write code everyone can understand. I had a discussion about this lately and it seems to me that this kind of code ramp is within java's philosophy. I have to write lots of code to achiveve simple things not because it is necessary but because this is the way most of the people at the company think. Is this universally applicable to most of the companies out there using java or this is just my company's view? Do I have to get used to the drudgery if I keep working for java-based firms?

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• How to find the occurrence of particular character in string - CHARINDEX

  - by Vipin

  Many times while writing SQL, we need to find if particular character is present in the column data. SQL server possesses an in-built function to do this job - CHARINDEX(character_to_search, string, [starting_position]) Returns the position of the first occurrence of the character in the string. NOTE - index starts with 1. So, if character is at the starting position, this function would return 1. Returns 0 if character is not found. Returns 0 if 'string' is empty. Returns NULL if string is NULL. A working example of the function is SELECT CHARINDEX('a', fname) a_First_occurence, CHARINDEX('a', fname, CHARINDEX('a', fname)) a_Second_occurrence FROM Users WHERE fname = 'aka unknown' OUTPUT ------- a_First_occurence a_Second_occurrence 1 3

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• Did Microsoft Add Wiretapping Capability to Skype?

  Ryan Gallagher, writing for Slate, put two and two together from a lot of no comments. He noted that back in 2007, German police forces said that they couldn't tap into Skype calls because of of its strong encryption and complicated peer-to-peer network connections; in fact, Skype bluntly stated at the time that, due to its encryption and architecture techniques, it couldn't conduct wiretaps. But that may have changed. Gallagher cited a Forbes article that claims the hacker community is talking about recent changes to Skype's architecture and whether they will allow users to be wiretapped. ...

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• How to write a network game?

  - by TomWij

  Based on Why is so hard to develop a MMO?: Networked game development is not trivial; there are large obstacles to overcome in not only latency, but cheat prevention, state management and load balancing. If you're not experienced with writing a networked game, this is going to be a difficult learning exercise. I know the theory about sockets, servers, clients, protocols, connections and such things. Now I wonder how one can learn to write a network game: How to balance load problems? How to manage the game state? How to keep things synchronized? How to protect the communication and client from reverse engineering? How to work around latency problems? Which things should be computed local and which things on the server? ... Are there any good books, tutorials, sites, interesting articles or other questions regarding this? I'm looking for broad answers, but specific ones are fine too to learn the difference.

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