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• What is the path to JavaScript mastery?

  - by Eric Wilson

  I know how we start with JavaScript, we cut-and-paste a snippit to gain a little client-side functionality or validation. But if you follow this path in trying to implement rich interactive behavior, it doesn't take long before you realize that you are creating a Big Ball Of Mud. So what is the path towards expertise in programming the interaction layer? What books, tutorials, exercises, and processes contribute towards the ability to program robust, maintainable JavaScript? We all know that practice is important in any endeavor, but I'm looking for a path similar to the answer here: http://stackoverflow.com/questions/2573135/

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• When do you use float and when do you use double

  - by Jakub Zaverka

  Frequently in my programming experience I need to make a decision whether I should use float or double for my real numbers. Sometimes I go for float, sometimes I go for double, but really this feels more subjective. If I would be confronted to defend my decision, I would probably not give sound reasons. When do you use float and when do you use double? Do you always use double, only when memory constraints are present you go for float? Or you use always float unless the precision requirement requires you to use double? Are there some substantial differences regarding computational complexity of basic arithemtics between float and double? What are the pros and cons of using float or double? And have you even used long double?

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• How well do free-to-open-source-projects policies work in practice?

  - by Steve314

  In comparison with an open source license and requesting donations, is a free-for-open-source-projects (or free for non-commercial developers) closed source and otherwise commercial project likely to get more license fees? Or just to alienate potential users? Assume the project has value to programmers - I'm looking for generalizations here, though specific examples comparing existing projects will be very interesting. What I have in mind involves code generating programming utilities. And one issue I can think of, either way, is a near total inability to enforce any license restrictions. After all, I can't go around the internet demanding that everyone show me their source code just in case!

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• Render 3d object to 2d surface (embedded system)

  - by Martin Berger

  i am working on an embedded system of a sort, and in some free time i would like to test its drawing capabilities. System in question is ARM Cortex M3 microcontroller attached to EasyMX Stellaris board. And i have a small 320x240 TFT screen :) Now, i have some free time each day and i want to create rotating cube. Micro C PRO for ARM doesnt have 3d drawing capabilities, which means it must be done in software. From the book Introduction to 3D Game Programming with DirectX 10 i know matrix algebra for transformations but that is cool when you have DirectX to set camera right. I gues i could make 2d object to rotate, but how would i go with 3d one? Any ideas and examples are welcome. Although i would prefer advices. I'd like to understand this.

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• How to create an auto-grader in and for Python

  - by recluze

  I'm trying to create an auto-grader for one of my beginning programming courses for python. From my online search, I've come to know that it is effectively a unit test framework that tests the student's code rather than production code but I'm not really sure how to structure the flow of the program. Can anyone please provide a strategy for submission of code by students and automating the whole process of marking? For instance, how would the student code be submitted and then stored/structured on disk, how would the grades be stored/reported? I'm only looking for a broad strategy and will try on my own to fill in the blanks. (I asked this on stockoverflow.com initially but it's considered as off-topic and I was suggested to ask here.)

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• How to modify VBO data

  - by Romeo

  I am learning LWJGL so i can start working on my game. In order to learn LWJGL I got the idea to implement the map builder so I can get comfortable with graphics programming. Now, for the map creation tool I need to draw new elements or draw the old one's with different coordinates. Let me explain this: My game will be a 2D scroller. The map will be consisting of multiple rectangles ( 2 strip triangles). When I click my left-mouse button i want to start the rectangle and when I release it I want to stop the rectangle bottom-right at that position. As I want to use VBOs I want to know how to modify data inside the VBO based on user input. Should i have a copy of a vertex array and then add the whole array to the VBO at each user input? How is usually implemented the VBO update?

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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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• Are developers expected to have skills of business analysts?

  - by T. Webster

  Our business analyst has left the team. We are now expected to do the work which was previously done by the business analyst, and the management thinks that a task which is done in three months by a business analyst can be done in one month by a developer. My experience is in programming only, and I'm not familiar to the business intelligence tools. To me this seems like maybe an unfair comparison or expectation, and might even trivialize the role of a business analyst. Has anyone else encountered this situation? How to deal with it?

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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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• What's the equivalent name of "procedure" in OOP?

  - by AeroCross

  In several of my programming courses in the University, my teachers always told me the following: A function and a procedure are basically the same thing: the only difference is that a function returns a value, and the procedure doesn't. That means that this: function sum($a, $b) { return $a + $b; } ... is a function, and this: function sum($a, $b) { echo $a + $b; } ... is a procedure. In the same train of thought, I've seen that a method is the equivalent of a function in the OOP world. That means that this: class Example { function sum($a, $b) { return $a + $b; } } Is a method — but how do you call this? class Example { function sum($a, $b) { echo $a + $b; } } What's the equivalent name, or how do you call a method that doesn't returns anything?

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• Graphic demonstrating emphasis of front end in web apps

  - by sohail

  I remember stumbling across an amusing graphic a year or so ago which demonstrated the tiers of web development. The back-end was shown as a tiny box, but the front end was shown as a huge box crammed with lots of front-end technologies like AJAX, DHTML. This is all a vague recollection. Does anyone know where on the Intraweb this graphic might be? It was probably on a programming cartoon site, but I only view XKCD on a regular basis, and I couldn't find it on there. Although tagged as fun, my request does have a productive edge to it - it would be quite useful in driving home to my colleagues how UI top-heavy web application development has become.

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• Google is good or bad for programmer? [closed]

  - by Vikas

  Recently I was being interviewed by a company and faced one question. The interviewer asked me a question and at that time I didn't know the answer but if I had been asked about just 4 months ago, I could have answered it. The question was from new language that I learned just 4 months ago. But I just get overview of the language and just get started working on that. Whenever I face difficultly, I google it. That means we do not have to memorize the whole programming language book! So in that situation I felt that Google screwed my job! Not talking subjectively, Is it good to google all the time?

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• *Hidden Features* in your operating system that increase productivity?

  - by AdityaGameProgrammer

  As developers how much time, or do you spend time, In learning the hidden features tricks of your operating system ? How important do you feel is this for productivity in day to day programming? tasks. What do you mean when you list knowledge of an OS in your resume? What are your most useful hidden -less known features For example: A common problem of How can i open the cmd window in a specific location a do it yourself solution in say xp and what to do if something breaks Or are these something you look into as and when you find the need to do so?

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• What functionality should I use in OpenGL 2.0?

  - by Jeffrey

  Considering OpenGL 2.1, we all know that glBegin and glEnd are the devil. Should I use only VBO to render 3d primitives (I can't find VAO in that version, weren't there already?)? Should I still use the matrix stack (why not?)? Should I still use glFrustum? Can I take advantage of shaders in GLSL 1.20? Where can I find a tutorial for VBO in OpenGL 2.1 and the "correct" way of programming in it? Also how am I supposed to animate something. Like a cube moving around an object or a player moving in the scene (static vbo data + shader?)? Note: Take your time to answer this question, I'll accept an answer tomorrow.

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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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• UDK/ UnrealScript class interaction? HUD advice?

  - by Holly

  Beginner basics requested here, While i'm familiar with the basics of OOP programming i've just started looking as UnrealScript for a game i had made in the UDK editor up to now. I have a class that extends UTHUD and another that extends UDKPAWN. I have the pawn destroyed when its been shot 3 times and some basic helloworld text displaying in my HUD but i'm completely lost as to how one would get some sort of feedback between the two classes going on? What i would like to do to start off, is have some text that says something like "Amount of baddies killed: 0" Displayed on the HUD which would then increment each time the player destroyed one of my pawns. I'm sorry if this is an inappropriate question but i've never really worked within a framework like this before and wasn't sure where to go for help to get my footing. All advice appreciated!

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• advice for a new software engineer/developer right out of college

  - by ranzy

  I just graduated recently from a 4-year university with a degree in Computer Science and thankfully got a job in Software Engineering. I'm working with C++ with a .NET framework if that's correct to say because that also confuses me. What I'm asking for is what tutorials/books are out there to learn C++ for Windows Programming I guess? I know how to program somewhat and I understand the concepts but when I look at the code it doesn't make sense to me. I know I just started so it's kind of expected but it's certainly quite different from college. Thanks!

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• How does the "Fourth Dimension" work with arrays?

  - by Questionmark

  Abstract: So, as I understand it (although I have a very limited understanding), there are three dimensions that we (usually) work with physically: The 1st would be represented by a line. The 2nd would be represented by a square. The 3rd would be represented by a cube. Simple enough until we get to the 4th -- It is kinda hard to draw in a 3D space, if you know what I mean... Some people say that it has something to do with time. The Question: Now, that is all great with me. My question isn't about this, or I'd be asking it on MathSO or PhysicsSO. My question is: How does the computer handle this with arrays? I know that you can create 4D, 5D, 6D, etc... arrays in many different programming languages, but I want to know how that works.

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• Cloudcel: Excel Meets the Cloud

  - by kaleidoscope

  Cloudscale  is launching Cloudcel Cloudcel is the first product that demonstrates the full power of integrated "Client-plus-Cloud" computing. You use desktop Excel in the normal way, but can also now seamlessly tap into the scalability and massive parallelism of the cloud, entirely from within Excel, to handle your Big Data. Building an app in Cloudcel is really easy – no databases, no programming. Simply drop building blocks onto the spreadsheet (in any order, in any location) and launch the app to the cloud with a single click. Parallelism, scalability and fault tolerance are automatic. With Cloudcel, you can process realtime data streams continuously, and get alerts pushed to you as soon as important events or patterns are detected ("Set it and forget it"). Cloudcel is offered as a pay-per-use cloud service – so no hardware, no software licenses, and no IT department required to set it up. Private cloud deployments are also available. Please find below link for more detail : http://billmccoll.sys-con.com/node/1326645 http://cloudcel.com/ Technorati Tags: Tanu

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• How do I pass tests with higher scores? [closed]

  - by user1867842

  How do I pass a test of programming knowledge for a higher score on oDesk.com? I have passed php and javascript tests but I have passed them with low scores and barley passing. This doesn't look too appealing for clients and I'm afraid that is the reason I am not being hired for a job. I know I am capable of doing web work and such. But I haven't been accepted for an interview or anything. Any idea how to study for something like this ?

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• Online iPad 1&2 emulators give different results compared to the real thing

  - by Systembolaget

  I'm designing a centered website (jQuery Isotope). Thre sandbox is here. I have used some online iPad 1&2 emulators to test how the site is viewed on these devices. Then, I managed to get hold of the real thing. Result: on real iPads, the site is centered and the layout adjusts automatically as expected. In online iPad emulators, the site is not quite centered and additional Isotope elements are squeezed in. Of course, I trust the real thing more than online emulators, but why is this happening? To me, it feels like website testing with online emulators is not so reliable after all? If this question is wrong here, please move it or tell me where it should go. SO is about programming, this question isn't. Thanks!

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• How to use OpenGL functions from multiples thread?

  - by Robert

  I'm writing a small game using OpenGL. I'm implementing basic networking in this game and I'm facing a problem. I have a thread in my client socket class that check for available data, when there are data I raise an event like this : immutable int len = this.m_socket.receive(data); if(len > 0) { this.m_onDataEvent(data); } Then on my game class, I have a function that handle and parse data like this : switch(msgId) { case ProtocolID.CharacterData: // Load terrain with opengl, character model.... Im not able to call opengl functions because my opengl context is created from a different thread. But I really don't know how I can solve this problem, I tried Google but it's really hard to find a solution. I'm using D programming language if it can help.

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• Associative array challenges, or examples?

  - by Aerovistae

  I understand well when and how to use an associative array, but I'm trying to teach a friend to program and I'm having some trouble with this particular concept. I need a good set of problems whose solutions are best implemented through the use of maps/hashes/associative arrays/dictionaries. I googled all over and couldn't find any. I was hoping someone might know of some, or perhaps get a community wiki sort of answer. That way I can say, here's our problem, and here's how we could effectively solve it through the use of an associative array... It's one of those cases where when I'm programming and I run into a situation that calls for a dictionary, I recognize it, but I can't seem to make up any such situations to use for a demonstration.

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• What is the term for a 'decoy' feature or intentional bug?

  - by Freiheit

  I have forgotten a slang programming term. This thing is an intentional bug or a decoy feature used as a distraction. An example usage, "Hey Bob, QA is doing a review today. Put a $THING into the module so they actually have a problem to find". This can be used negatively, to have a very obvious intentional flaw to discover as a distraction from a real problem. This can also be used positively. Its like how you always let rescue dogs 'find' a victim when searching a disaster area. It can also be used to verify that a QA process is actually catching flaws. What is the term I am looking for?

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• My first flash game bot, in java

  - by Dylan

  Okay so i love coming up with new programming challenges and ive discovered a new challenge. I would love to create a bot for a game that requires the user to click on a character and drag the mouse like a slingshot. Upon releasing the mouse the character flys across the game and hopefully lands in a scored spot(in my bot the highest score). the game looks like this an image of the game is here. http://i.stack.imgur.com/fThnG.jpg How would i go about calculating the location of the character and then the physics to know exactly where to drag the mouse to?

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