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• How do I include Implementation and Usage Documentation in one file

  - by Angelo.Hannes

  There are two types of documentation. One type, the Implementation Documentation, contains information about specific implementation of a construct (eg. Class, Method, etc.). It is targeted to the future me, maintainer, debugger and so on. And there is Usage Documentation, containing information how to use a provided api. It does not contain information about specific implementation and is targeted to users of the api. How do I include both of them in one file? (Or do I include both of them in one file? And if not, what type belongs into the source file?) Are there special techniques, using java-doc and/or best practices?

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• how to generate number pattern in triangular form

  - by Vignesh Vicky

  I want to print this pattern like right angled triangle 0 909 89098 7890987 678909876 56789098765 4567890987654 345678909876543 23456789098765432 1234567890987654321 I wrote following code # include<stdio.h> # include<conio.h> void main() { clrscr(); int i,j,x,z,k,f=1; for ( i=10;i>=1;i--,f++) { for(j=1;j<=f;j++,k--) { k=i; if(k!=10) { printf("%d",k); } if(k==10) { printf("0"); } } for(x=1;x<f;x++,z--) { z=9; printf("%d",z); } printf("%d/n"); } getch(); } what is wrong with this code? when i check manually it seems correct but when compiled gives different pattern

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• Simple Architecture Verification

  - by Jean Carlos Suárez Marranzini

  I just made an architecture for an application with the function of scoring, saving and loading tennis games. The architecture has 2 kinds of elements: components & layers. Components: Standalone elements that can be consumed by other components or by layers. They might also consume functionality from the model/bottom layer. Layers: Software components whose functionality rests on previous layers (except for the model layer). -Layers: -Models: Data and it's behavior. -Controllers: A layer that allows interaction between the views and the models. -Views: The presentation layer for interacting with the user. -Components: -Persistence: Makes sure the game data can be stored away for later retrieval. -Time Machine: Records changes in the game through time so it's possible to navigate the game back and forth. -Settings: Contains the settings that determine how some of the game logic will apply. -Game Engine: Contains all the game logic, which it applies to the game data to determine the path the game should take. This is an image of the architecture (I don't have enough rep to post images): http://i49.tinypic.com/35lt5a9.png The requierements which this architecture should satisfy are the following: Save & load games. Move through game history and see how the scoreboard changes as the game evolves. Tie-breaks must be properly managed. Games must be classified by hit-type. Every point can be modified. Match name and player names must be stored. Game logic must be configurable by the user. I would really appreciate any kind of advice or comments on this architecture. To see if it is well built and makes sense as a whole. I took the idea from this link. http://en.wikipedia.org/wiki/Model%E2%80%93view%E2%80%93controller

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• How to copyright and license individual code files

  - by Hand-E-Food

  I have a habit of writing small, reusable components in my spare time. I reuse these components with my clients' code bases. It occurs to me there's a potential issue that using identical code for multiple clients may bite me back in the future. I don't care who uses the code. I just don't want a situation where one company tries to sue another for copyright infringement due to my actions. I'm not familiar with common licensing schemes. What do I need to specify in my code files to indicate that these protions are copyrighted to myself and usable by anyone, while differentiating them from the code specificly written for the client? Where can I find more information on this scenario?

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• What is the best wrapping strategy ?

  - by Riduidel

  Hi, I'm planning to integrate an external tool (ffmpeg in my particular case, but it could be anything, in fact, as lolng as its tasks are long running ones). This tool has a lot of command-line parameters. For now, I've done to simple things with it, already requiring me a good bunch of class writing, to embed all the information it can return to me. I now face the even more complex task of having to send it a bunch of parameters and to handle possible errors. So, what is a best way for that ? Create classes containing all possible options Relying upon a reverse equivalent of commons-cli / CliBuilder / OptionParser Directly write all options from user input Obiwan Kenobi powers (or anything I don't even know about) Please notice I do it in an uncommon language (for the sake of me, don't ask me what it is, as it looks like a desperate and sterile union between CoffeeScript and lua), as a consequence, there can be no framework doing what I want in the language I use.

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• Value of Internationalization in the iPhone App store?

  - by hotpaw2

  I have several iOS/iPhone apps that have been continually selling in small amounts in over 2 dozen different countries, even though the app UIs and all the store descriptions are only in English. In a few countries where English is not the official or native language, a few apps are selling far better than is proportionate for those country's population size compared with the U.S. So why Internationalize apps? What kind of increase, if any, in sales might a typical app see if it is Internationalized into given local languages? Which major languages might be likely to see the greatest improvement in app sales or downloads due to a localized app description?

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• What is (are) the most useful technique/visualization for overall project status?

  - by Wayne Werner

  For reasons "above my pay grade", we're developing an issue/project tracking system where I work (similar to Trac, FogBugz, etc). The managers want a useful tool to be able to track the overall health of the project (e.g. How much time left, how are we performing vs estimates) and one of the features that has been requested is some type of critical path support and visualization. The logic explained to me is that they want to be sure that at least the most important pieces of the project are currently being worked on. The initial idea was that we would create task-based dependencies. My understanding of project management tells me that this kind of granular approach is unnecessary - having milestones with specific deadlines/dependencies is much more useful. I would like to know what are the most useful techniques and "pretty pictures" you've seen/used for project development. Having objective data would be best, but somewhat subjective data is helpful too.

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• Using source code with no license

  - by nathansizemore

  I've recently come across a publicly viewable project on Github that has no license associated with it. In this repo, there is a file with the logic and most of the code needed to work as a piece of a project I am working on. Not verbatim, but about 60% of it I'd like to use with various modifications. Once my code base is a little bit more stable, I plan to release what I've done under the WTFPL License. I've emailed the repo owner, and so far have not gotten a reply. I know I have the rights to fork the repo, but if I release a stripped down and modified version of the other project's file with mine, under the WTFPL, am I infringing on copyrights? Per Github's Terms of Service, by submitted a project on Github and making it viewable to the public, you are allowing other users to see and fork your project. Doesn't say anything about modifying, distributing, or using the fork. And at what point of modification to the original does it become owned by me?

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• Why using the word "mechanism" in CS?

  - by Nick Rosencrantz

  I'm not sure about the usage of the word "mechanism" when in fact most of the time what is meant is an algorithm. For instance there's talk about Java's "thread-scheduling mechanism" - why not call it an algorithm and why borrow a term from mechanics where relations sometimes are the opposites than of computer science? I'm aware that an algorithm is considered a "mechanical solution" but is this really the case in fact when a lot of algorithm don't have mechanical representations for instance a file-sharing network that gets quicker and faster as the usage grows, that would be the reverse of a mechanical structure that would go slower when usage grows.

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• How have Guava unit tests been generated automatically?

  - by dzieciou

  Guava has unit test cases automatically generated: Guava has staggering numbers of unit tests: as of July 2012, the guava-tests package includes over 286,000 individual test cases. Most of these are automatically generated, not written by hand, but Guava's test coverage is extremely thorough, especially for com.google.common.collect. How they were generated? What techniques and technologies were used to design and generate them?

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• For those of you who are senior developers what do you look for in a new company and development team?

  - by Amy P

  As I move forward in my career new jobs become more difficult to choose between. When I was starting out and for the first 8 years of my career I took the jobs that I could get that would keep me programming on the general technological path that I was on. I am a job hopper, I only stay with a company for between 2 - 3 years. I think that I do this because after 2 years I get bored and unless there are new projects to keep my busy I no longer find work interesting. Now that I am becoming more experienced it is more important for me to only apply for jobs that are interesting and will move my career and my skill set forward. My problem now is that I keep finding jobs where the projects appear to be interesting during the interview but once I get in the company I find the development environment is sub-par and the development team is disjointed. I feel like I am asking the wrong questions during the interview process and don't know what to look for to make sure that the environment I will be working in will be a good one. Now my question: For those of you who are senior developers what do you look for in a new company and development team? I am looking for the key qualities in a company and development team that you look for when interviewing with a company. These qualities are the ones that would give you hints that the company will be a good one to work for.

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• What's the best platform for blogging about coding? [closed]

  - by timday

  I'm toying with starting an occasional blog for posting odd bits of coding related stuff (mainly C++, probably). Are there any platforms which can be recommended as providing exceptionally good support (e.g syntax highlighting) for posting snippets of code ? (Or any to avoid because posting mono-spaced font blocks of text is a pain). Outcome: I accepted Josh K's answer because what I actually ended up doing was realizing I was more interested in articles than a blog style, getting back into LaTeX (after almost 20 years away from it), using the "listings" package for code, and pushing the HTML/PDF results to my ISP's static-hosting pages. (HTML generated using tex4ht). Kudos to the answers mentioning Wordpress, Tumblr and Jekyll; I spent some time looking into all of them.

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• How do i rotate a 2D picturebox according to my mouse

  - by Gwenda.T

  I would want to rotate my picturebox which contains an image. The image will just spin around following the mouse, but the position of the image is fixed. Any idea on how it should be done? Btw using Visual Studio 2012 C# Windows phone application for Windows Phone 8. I've did a little research on google but the other codes were from VS2012 using a WinForm But it's different now I'm not able to use their code. So I was hoping I could find some answer at here! Currently now I have this private void arrowHead_Tap(object sender, System.Windows.Input.GestureEventArgs e) { Duration Time_duration = new Duration(TimeSpan.FromSeconds(0.5)); Storyboard MyStory = new Storyboard(); MyStory.Duration = Time_duration; DoubleAnimation My_Double = new DoubleAnimation(); My_Double.Duration = Time_duration; MyStory.Children.Add(My_Double); RotateTransform MyTransform = new RotateTransform(); Storyboard.SetTarget(My_Double, MyTransform); Storyboard.SetTargetProperty(My_Double, new PropertyPath("Angle")); My_Double.To = 15; arrowHead.RenderTransform = MyTransform; arrowHead.RenderTransformOrigin = new Point(0.5, 0.5); //stackPanel1.Children.Add(image1); MyStory.Begin(); } This is my only way of tilting the image however now I want it to follow my mouse! Thanks!

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• Setting up Developers Conference

  - by Darknight

  In our local city in the UK, there are as far as I am aware no developer conferences. I am confident that our region has many professional developers as well as many graduating students whom who really benefit from a conference. I would like to ask the following questions: What steps or advice would one take if the task was given to set up a local developers conference? What would the costing look like? (excluding building/hosting of website(s)) How would one build interest and promote this? How would I approach, Local Companies & Universities to collaborate with them? I'm not just aiming this question to users who may have experience in setting up such conferences (but are highly welcome). Rather how would you attack this if you was tasked with this?

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• Do best practices to avoid vendor lock-in exist?

  - by user1598390

  Is there a set of community approved rules to avoid vendor lock-in ? I mean something one can show to a manager or other decision maker that is easy to understand and easily verifiable. Are there some universally accepted set of rules, checklist or conditions that help detect and prevent vendor lock-in in an objective, measurable way ? Have any of you warned a manager about the danger of vendor lock-in during the initial stages of a project ?

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• When to use PHP or ASP.NET? [closed]

  - by loyalpenguin

  I have worked extensively in developing web applications using PHP and ASP.NET, but one of the questions that I'm constantly asked by customers is whether to move forward with a php website or an asp.net website. So naturally the first thing that comes to mind is to answer the question like this: PHP is open-source and ASP.NET is from Microsoft. Usually after something like that is said the customer has a blank look on there face. Apparently the fact that one is open source and the other isn't doesn't really faze them. And for good reason, because when I first heard it, it really doesn't tell me much. I know from working with both that each have their + and - when it comes to developing websites. NOTE: THIS QUESTION IS NOT TO QUESTION WHICH IS BETTER TO DEVELOP WITH. THIS QUESTION IS INTENDED TO BE OBJECTIVE. My question is what are differences between ASP.NET and PHP as far as Features Security Extendability Frameworks Average Development Time And when one is generally used over the other for certain types of projects. I am trying to compile a list of facts to be able to compare with the customer what developement platform is better for there particular project. I have done a simple search on google and a ton of articles come up, but the problem is the majority are usually biased towards PHP or ASP.NET. Also if you can maybe provide examples from experience when one technology was more preferable than the other that would be awesome.

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• How can I distribute a unique database already in production?

  - by JVerstry

  Let's assume a successful web Spring application running on a MySQL or PostgreSQL database. The traffic is becoming so high and the amount of data is becoming so big that a distributed database solution needs to be implemented to address scalability issue. Let's also assume this application is using Hibernate and the data access layer is cleanly separated with DAOs. Ideally, one should be able to add or remove databases easily. A failback solution is welcome too. What would be the best strategy to scale this database? Is it possible to minimize sharding code (Shard) in the application?

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• Designing a Business Rule Engine

  - by Nisha_Roy

  I have a requirement where there are 10 Rules to be applied on data in excel. If Rule 1 and Rule 2 fails rest of the rules are not checked. But if Rule 1 and Rule 2 passes the rest of all the Rules should be verified and if any errors found- they should be logged. Is there any design pattern which I can use to keep this Rule Engine flexible for adding these 10 rules and Closed for any additional chains in the Current Rule. I was thinking of something like a Decorator Pattern. Will this help me achieve that?

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• What is this algorithm for converting strings into numbers called?

  - by CodexArcanum

  I've been doing some work in Parsec recently, and for my toy language I wanted multi-based fractional numbers to be expressible. After digging around in Parsec's source a bit, I found their implementation of a floating-point number parser, and copied it to make the needed modifications. So I understand what this code does, and vaguely why (I haven't worked out the math fully yet, but I think I get the gist). But where did it come from? This seems like a pretty clever way to turn strings into floats and ints, is there a name for this algorithm? Or is it just something basic that's a hole in my knowledge? Did the folks behind Parsec devise it? Here's the code, first for integers: number' :: Integer -> Parser Integer number' base = do { digits <- many1 ( oneOf ( sigilRange base )) ; let n = foldl (\x d -> base * x + toInteger (convertDigit base d)) 0 digits ; seq n (return n) } So the basic idea here is that digits contains the string representing the whole number part, ie "192". The foldl converts each digit individually into a number, then adds that to the running total multiplied by the base, which means that by the end each digit has been multiplied by the correct factor (in aggregate) to position it. The fractional part is even more interesting: fraction' :: Integer -> Parser Double fraction' base = do { digits <- many1 ( oneOf ( sigilRange base )) ; let base' = fromIntegral base ; let f = foldr (\d x -> (x + fromIntegral (convertDigit base d))/base') 0.0 digits ; seq f (return f) Same general idea, but now a foldr and using repeated division. I don't quite understand why you add first and then divide for the fraction, but multiply first then add for the whole. I know it works, just haven't sorted out why. Anyway, I feel dumb not working it out myself, it's very simple and clever looking at it. Is there a name for this algorithm? Maybe the imperative version using a loop would be more familiar?

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• Where can I learn more about JavaScript and Python?

  - by Tom Maxwell

  Been teaching myself how to code over the past four months or so -- mainly in JavaScript, but just started Python -- and had a revelation today. I can write in JavaScript pretty well, but I don't actually know what JavaScript is. Basically I know how to use it, but not the advantages/disadvantages, its origination, its purpose, etc. Where can I learn more about the languages themselves and not just how to write in them?

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• Will Apple abandon OpenCL?

  - by John

  I am developing OpenCL applications, amongst others for MacOS. The new Macbook pro 13 inch comes with an Intel HD Graphics 3000 card so it seams reasonable to assume all their mainstream computers like Macbook and Mac mini will also come out with this Intel graphics card soon. OpenCL is not available for Intel graphics cards. Intel having a terrible reputation in developing graphics drivers and Apple knowing this makes me wonder Apple is abandoning OpenCL already again. Especially considering OpenCL should run anywhere, not only on high end systems. Developing applications only for the high end Macs with dedicated graphics hardware or for previous generation hardware with the Geforce 320M would not be a feasible option for me. Does anybody have any thoughts on this?

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• What should you say in post-interview?

  - by ??? Shengyuan Lu

  When you are leaving your company, you will be post-interviewed. As best practice, you shouldn't say something bad about your company, because it will "burn your bridge", another best practice is to keep silence if the company really sucks. I think if you decide to leave, there must be a reason(s) making you really unhappy, and I am sure you will have something really important to tell your employer. Then what is your attitude about post-interview?

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• Why is there no facility to overload static properties in PHP?

  - by Jon

  Intro PHP allows you to overload method calls and property accesses by declaring magic methods in classes. This enables code such as: class Foo { public function __get($name) { return 42; } } $foo = new Foo; echo $foo->missingProperty; // prints "42" Apart from overloading instance properties and methods, since PHP 5.3.0 we can also overload static methods calls by overriding the magic method __callStatic. Something missing What is conspicuously missing from the available functionality is the ability to overload static properties, for example: echo Foo::$missingProperty; // fatal error: access to undeclared static property This limitation is clearly documented: Property overloading only works in object context. These magic methods will not be triggered in static context. Therefore these methods should not be declared static. As of PHP 5.3.0, a warning is issued if one of the magic overloading methods is declared static. But why? My questions are: Is there a technical reason that this functionality is not currently supported? Or perhaps a (shudder) political reason? Have there been any aborted attempts to add this functionality in the past? Most importantly, the question is not "how can I have dynamic static properties in userland PHP?". That said, if you know of an especially cute implementation based on __callStatic that you want to share then by all means do so.

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• Type of computer for a developer on the road

  - by nabucosound

  Hi developers: I am planning to be traveling through eurasia and asia (russia, china, korea, japan, south east asia...) for a while and, although there are plenty of marvelous things to see and to do, I must keep on working :(. I am a python developer, dedicated mainly to web projects. I use django, sqlite3, browsers, and ocassionaly (only if I have no choice) I install postgres, mysql, apache or any other servers commonly used in the internets. I do my coding on vim, use ssh to connect, lftp to transfer files, IRC, grep/ack... So I spend most of my time in the terminal shells. But I also use IM or Skype to communicate with my clients and peers, as well as some other software (that after all is not mandatory for my day-to-day work). I currently work with a Macbook Pro (3 years old now) and so far I am very happy with the performance. But I don't want to carry it if I am going to be "on transit" for long time, it is simply huge and heavy for what I am planning to load in my rather small backpack (while traveling, less is more, you know). So here I am reading all kind of opinions about netbooks, because at first sight this is the kind of computer I thought I had to choose. I am going to use Linux for it, Microsoft is not my cup of tea and Mac is not available for them, unless I were to buy a Macbook air, something that I won't do because if I am robbed or rain/dust/truck loaders break it I would burst in tears. I am concerned about wifi performance and connectivity, I am going to use one of those linux distros/tools to hack/test on "open" networks (if you know what I mean) in case I am not in a place with real free wifi access and I find myself in an emergency. CPU speed should be acceptable, but since I don't plan to run Photoshop or expensive IDEs, I guess most of the time I won't be overloading the machine. Apart from this, maybe (surely) I am missing other features to consider. With that said (sorry about the length) here it comes my question, raised from a deep ignorance regarding the wars betweeb betbooks vs notebooks (I assume tablet PCs are not for programming yet): If I buy a netbook will I have to throw it away after 1 month on the road and buy a notebook? Or will I be OK? Thanks! Hector Update I have received great feedback so far! I would like to insist on the fact that I will be traveling through many different countries and scenarios. I am sure that while in Japan I will be more than fine with anything related to technology, connectivity, etc. But consider that I will be, for example, on a train through Russia (transsiberian) and will cross Mongolia as well. I will stay in friends' places sometimes, but most of the time I will have to work from hostel rooms, trains, buses, beaches (hey this last one doesn't sound too bad hehe!). I think some of your answers guys seem to focus on the geek part but loose the point of this "on the road" fact. I am very aware and agree that netbooks suck compared to notebooks, but what I am trying to do here is to find a balance and discover your experiences with netbooks to see first hand if a netbook will be a fail in the mid-long term of the trip for my purposes. So I have resumed the main concepts expressed here on this small list, in no particular order: keyboard/touchpad feel: I use vim so no need of moving mouse pointers that much, unless I am browsing the web, but intensive use of keyboard screen real state: again, terminal work for most of the time battery life: I think something very important weight/size: also very important looks not worth stealing it, don't give a shit if it is lost/stolen/broken: this may depend on kind of person, your economy, etc. Also to prevent losing work, I will upload EVERYTHING to the cloud whenever I'll have a chance. wifi: don't want to discover my wifi is one of those that cannot deal with half the routers on this planet or has poor connectivity. Thanks again for your answers and comments!

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• Why do we keep using CSV?

  - by Stephen

  Why do we keep using CSV? I recently made a shift to working the health domain and despite the wonderful work in data transfer standards, all data transfer is in CSV, both for reporting to external organisations, and for data migrations when implementing new systems. Unfortunately the use of CSV is the cause of the endless repetition of the same stupid errors, with the same waste of developer time. (bad escaping, failing to handle null fields etc.) I know we can do better, and anything between JSON and XML (depending on the instance) would be fine. (Most of the time this is data going from one MS SQLserver 2005 to another!) I feel as if each time I see this happening I am literally watching one developer waste anothers time. So why do we keep shafting each other? When will we stop?

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