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  • How to learn & introduce scrum in small startup?

    - by Jens Bannmann
    In a few months, a friend will establish his startup software company, and I will be the software architect with one additional developer. Though we have no real day-to-day experience with agile methods, I have read much "overview" type of material on them, and I firmly believe they are a good - if not the only - way to build software. So with this company, I want to go for iterative, agile development from day 1, preferably something light-weight. I was thinking of Scrum, but the question is: what is the best way for me and my colleagues to learn about it, to introduce it (which techniques when etc) and to evaluate whether we should keep it? Background which might be relevant: we're all experienced developers around the same age with similar professional mindset. We have worked together in the past and afterwards at several different companies, mostly with a Java/.NET focus. Some are a bit familiar with general ideas from the agile movement. In this startup, I have great power over tools, methods and process. The startup's product will be developed from scratch and could be classified as middleware. We have some "customer" contacts in the industry who could provide input as soon as we get to an alpha stage.

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  • Do most companies not know how to write software?

    - by SnOrfus
    If you're an active reader here, try to think about how many times you've heard (and even agreed) when someone here has told someone else to start looking for a new job. Personally, I've seen it a lot more than I expected: it's almost starting to sound cliche. I get that there are bound to be a number of companies that are bad at developing software or managing a software project, but it almost seems like it's getting worse and more frequent, maybe we're just hearing from them and not all of the places that have decent work atmospheres/conditions. So I ask: In your experience, and through your developer friends do you find that it is common that companies have bad development environments and if so: Why do you think it's common? What do you think could be done to fix it as a developer, as a manager, as an industry? Do you think it's improving?

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  • Handling Coding Standards at Work (I'm not the boss)

    - by Josh Johnson
    I work on a small team, around 10 devs. We have no coding standards at all. There are certain things that have become the norm but some ways of doing things are completely disparate. My big one is indentation. Some use tabs, some use spaces, some use a different number of spaces, which creates a huge problem. I often end up with conflicts when I merge because someone used their IDE to auto format and they use a different character to indent than I do. I don't care which we use I just want us all to use the same one. Or else I'll open a file and some lines have curly brackets on the same line as the condition while others have them on the next line. Again, I don't mind which one so long as they are all the same. I've brought up the issue of standards to my direct manager, one on one and in group meetings, and he is not overly concerned about it (there are several others who share the same view as myself). I brought up my specific concern about indentation characters and he thought a better solution would be to, "create some kind of script that could convert all that when we push/pull from the repo." I suspect that he doesn't want to change and this solution seems overly complicated and prone to maintenance issues down the road (also, this addresses only one manifestation of a larger issue). Have any of you run into a similar situation at work? If so, how did you handle it? What would be some good points to help sell my boss on standards? Would starting a grass roots movement to create coding standards, among those of us who are interested, be a good idea? Am I being too particular, should I just let it go? Thank you all for your time. Note: Thanks everyone for the great feedback so far! To be clear, I don't want to dictate One Style To Rule Them All. I'm willing to concede my preferred way of doing something in favor of what suits everyone the best. I want consistency and I want this to be a democracy. I want it to be a group decision that everyone agrees on. True, not everyone will get their way, but I'm hoping that everyone will be mature enough to compromise for the betterment of the group. Note 2: Some people are getting caught up in the two examples I gave above. I'm more after the heart of the matter. It manifests itself with many examples: naming conventions, huge functions that should be broken up, should something go in a util or service, should something be a constant or injected, should we all use different versions of a dependency or the same, should an interface be used for this case, how should unit tests be set up, what should be unit tested, (Java specific) should we use annotations or external config. I could go on.

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  • Adaptative Interface with Open GL and Machine Learning in c#

    - by Afnan
    For my Semester project i have to go for any Adaptative Interface Design. My language is c# and i have to Use OpenTK(Wrapper for Open GL). I have an idea that I should show Two points and some obstacles. and my subject which is user would drag an object from one place to the final place avoiding the Obstacles. and he can place obstacles randomly.My software should be made to learn some paths by doing test runs and then after learning program should be able to predict the shortest path. I donot know how stupid this idea sounds but it is just an idea.I need help regarding any ideas for adaptative interface possible small projects or if my idea is ok then please can you tell me what should be used to implement it? I mean that along with OpenGl for the Graphics what can i use for machine learning that helps me Thanks

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  • How do I make complex SQL queries easier to write?

    - by DragonLord
    I'm finding it very difficult to write complex SQL queries involving joins across many (at least 3-4) tables and involving several nested conditions. The queries I'm being asked to write are easily described by a few sentences, but can require a deceptive amount of code to complete. I'm finding myself often using temporary views to write these queries, which seem like a bit of a crutch. What tips can you provide that I can use to make these complex queries easier? More specifically, how do I break these queries down into the steps I need to use to actually write the SQL code? Note that I'm the SQL I'm being asked to write is part of homework assignments for a database course, so I don't want software that will do the work for me. I want to actually understand the code I'm writing. More technical details: The database is hosted on a PostgreSQL server running on the local machine. The database is very small: there are no more than seven tables and the largest table has less than about 50 rows. The SQL queries are being passed unchanged to the server, via LibreOffice Base.

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  • When to use HTTP status code 404 in an API

    - by Sybiam
    I am working on a project and after arguing with people at work for about more than a hour. I decided to know what people on stack-exchange might say. We're writing an API for a system, there is a query that should return a tree of Organization or a tree of Goals. The tree of Organization is the organization in which the user is present, In other words, this tree should always exists. In the organization, a tree of goal should be always present. (that's where the argument started). In case where the tree doesn't exist, my co-worker decided that it would be right to answer response with status code 200. And then started asking me to fix my code because the application was falling apart when there is no tree. I'll try to spare flames and fury. I suggested to raise a 404 error when there is no tree. It would at least let me know that something is wrong. When using 200, I have to add special check to my response in the success callback to handle errors. I'm expecting to receive an object, but I may actually receive an empty response because nothing is found. It sounds totally fair to mark the response as a 404. And then war started and I got the message that I didn't understand HTTP status code schema. So I'm here and asking what's wrong with 404 in this case? I even got the argument "It found nothing, so it's right to return 200". I believe that it's wrong since the tree should be always present. If we found nothing and we are expecting something, it should be a 404. More info, I forgot to add the urls that are fetched. Organizations /OrgTree/Get Goals /GoalTree/GetByDate?versionDate=... /GoalTree/GetById?versionId=... My mistake, both parameters are required. If any versionDate that can be parsed to a date is provided, it will return the closes revision. If you enter something in the past, it will return the first revision. If by Id with a id that doesn't exists, I suspect it's going to return an empty response with 200. Extra Also, I believe the best answer to the problem is to create default objects when organizations are created, having no tree shouldn't be a valid case and should be seen as an undefined behavior. There is no way an account can be used without both trees. For that reasons, they should be always present. also I got linked this (one similar but I can't find it) http://viswaug.files.wordpress.com/2008/11/http-headers-status1.png

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  • Learning to implement dynamically typed language compiler

    - by TriArc
    I'm interested in learning how to create a compiler for a dynamically typed language. Most compiler books, college courses and articles/tutorials I've come across are specifically for statically typed languages. I've thought of a few ways to do it, but I'd like to know how it's usually done. I know type inferencing is a pretty common strategy, but what about others? Where can I find out more about how to create a dynamically typed language? Edit 1: I meant dynamically typed. Sorry about the confusion. I've written toy compilers for statically typed languages and written some interpreters for dynamically typed languages. Now, I'm interested in learning more about creating compilers for a dynamically typed language. I'm specifically experimenting with LLVM and since I need to specify the type of every method and argument, I'm thinking of ways to implement a dynamically typed language on something like LLVM.

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  • What do you think are the biggest software development issues, in small to medium businesses?

    - by Ron-Damon
    Hi, I own a small software development company that developes Web software to other small and medium companies in Chile. The business process is very complex and it is hard to stablish where to put the efforts to make our company better, more efficient, and give better solutions. I'm also a TI master's degree student and i'm making a paper about this subject, so any help would be great to help my company and my paper. I have considered 3 areas for the problems: 1) Software development problems 2) Web development problems 3) Small and Medium companies problems I don't know about you, but at least this "business formula" in Chile has not received very much support but it is getting better, but today my company is far from being self-sufficient. UPDATE: Thanks guys for your support so far, i'm updating because i have somewhat enough information so i decided to go deeper within the subjects, wish i would like you to consider for your next answers/commentaries on the subject: 1) Software development problems (3) 1.1 Incomplete problem picture 1.2 Useless delivered software 1.3 Unrealistic or inadequate schedule 2) Web development problems (3) 2.1 Apparently non-viable implementation 2.2 Unefficient module construction design 2.3 Reduced result system inter-operability 3) Small and Medium companies problems (3) 3.1 Very specific, but narrowed requerired system characteristics 3.2 Developed system is not used 3.3 Positivist demand for activities in project execution There are only 3 problems for category, to deliberately keep a thiner scope. Also, i have considered that it would have been apropiated to separate the third clasification on two, but won't be doing it just now: 3) Small and Medium software developement providers problems 4) Small and Medium software developement clients problems In that case, i think i would have made the scope of the problem wider and it is not what i want to do now, until at least i'm very trough with the other two clasifications. What you think?

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  • Git-based storage and publishing, infrastructure advice

    - by Joel Martinez
    I wanted to get some advice on moving a system to "the cloud" ... specifically, I'm looking to move into some of Windows Azure's managed services, as right now I'm managing a VM. Basically, the system operates on some data stored in a github git repository. I'll describe the current architecture: Current system (all hosted on a single server): GitHub - configured with a webhook pointing at ... ASP.NET MVC application - to accept the webhook from git. It pushes a message onto ... Azure service bus Queue - which is drained by ... Windows Service - pulls the message from the queue and ... Fetches the latest data from the git repository (using GitLib2Sharp) onto the local disk and finally ... Operates on the data in git to produce a static HTML website hosted/served by IIS. The system works really well, actually ... but I would like to get out of the business of managing the VM, and move to using some combination of Azure web and worker roles. But because the system relies so heavily on the git repository on the local filesystem, I'm finding it difficult to figure out how to architect in the cloud. I know you can get file system access, so in theory I could just fetch the repository if there's nothing on disk ... but the performance/responsiveness of the system sort of depends on the repository being available and only having to fetch diffs, which is relatively quick. As opposed to periodically having to fetch the entire (somewhat large) git repository if the web or worker role was recycled, or something. So I would love some advice on how you would architect such a system :) Ultimately, the only real requirement is to be able to serve HTML content that's been produced from the contents of a git repository (in a relatively responsive manner, from a publishing perspective) ... please feel free to ask any clarifying questions if there's something I omitted. Thanks!

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  • What should a freelancer's business card have?

    - by Sergio
    For example, when I first started out freelancing a year ago, my business card had my name, email and website - and up top a list of the technologies I'm comfortable with. In retrospect I don't feel this was a wise decision. Why would a potential client know what Python or Ruby is? How could he know what .NET was? I still have a couple of the old batch left, but I'm going to send out for some new cards. What do you recommend we developers have to show on our business cards? Am I correct in thinking listing technologies is meaningless to potential clients?

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  • What do you do to get your software design robust, flexible and clear?

    - by Oscar
    I am still getting mature as a software engineering/designer/architect, as you may want to call. At this point in time, I am getting small projects, private projects and so on. What I noticed is that even though I think about the SW structure, design some diagrams, have they really clear in my mind when I start coding, at the end, my software is not flexible and clear as I would like to. I would like to ask you what kind of approaches, mechanisms or even tricks do you use, to get your software (and SW design) flexible, robust and clear (easy to understand and use). So.... Any ideas to give to a beginner?

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  • Central Exception Handler

    - by J-unior
    Recently I've been thinking about a general ExceptionHandler, that I could initialize once in my app context and inject it everywhere. The idea that it will have quite simple interface with just public void handle(Exception ex), and then according to exception type it should decide what to do, maybe just log it, or show an alert message to the user, or maybe kill the whole app. The question is, what is the prettiest way to write such handler without lots of instanceofs? Unfortunately googling gives me only the default exception handler for RuntimeException that was introduced in Java 5. My first idea is to create an enum, that will have Class field for exception type and it will return the appropriate execution point, for example a concrete exception handler that also implements the interface public void handle(Exception ex), but with the required casting already.

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  • form checkboxes different names each into multiple rows database [closed]

    - by Darlene
    Hi i've been at this for hours and need help. Thanks in advice. i have the following tables: tblprequestion quesid| ques tblanswers answerid|quesid | ans |date This is my form: prequestion form <?php $con = mysql_connect("localhost","root","") or die ("Could not connect to DB Server"); $db_selected = mysql_select_db("nbtsdb", $con) or die("Could not locate the DB"); $query3= mysql_query("SELECT * FROM tblprequestions", $con) or die("Cannot Access prequestions description from Server"); echo"<legend> Pre question :</legend>"; echo"<p></p>"; while($row = mysql_fetch_array($query3)) { echo"<p>"; echo"<input type='checkbox' name='question".$row['quesid']."[]' value='yes' />"; echo"<label>".$row['ques']."</label>&nbsp;&nbsp;&nbsp;"; echo"</p>"; } echo"<p></p>"; ?> i would like to know how to get the values from the form for each question (total of 17) to submit into the database. for example tblprequestion quesid| ques 1 Had a cold or fever in the last week? 2 Had minor outpaient surgery? tblanswers answerid|username |quesid | ans |date 1 lisa 1 yes 10/10/12 2 lisa 2 no 10/10/12

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  • Is this simple XOR encrypted communication absolutely secure?

    - by user3123061
    Say Alice have 4GB USB flash memory and Peter also have 4GB USB flash memory. They once meet and save on both of memories two files named alice_to_peter.key (2GB) and peter_to_alice.key (2GB) which is randomly generated bits. Then they never meet again and communicate electronicaly. Alice also maintains variable called alice_pointer and Peter maintains variable called peter_pointer which is both initially set to zero. Then when Alice needs to send message to Peter they do: encrypted_message_to_peter[n] = message_to_peter[n] XOR alice_to_peter.key[alice_pointer + n] Where n i n-th byte of message. Then alice_pointer is attached at begining of the encrypted message and (alice_pointer + encrypted message) is sent to Peter and then alice_pointer is incremented by length of message (and for maximum security can be used part of key erased) Peter receives encrypted_message, reads alice_pointer stored at beginning of message and do this: message_to_peter[n] = encrypted_message_to_peter[n] XOR alice_to_peter.key[alice_pointer + n] And for maximum security after reading of message also erases used part of key. - EDIT: In fact this step with this simple algorithm (without integrity check and authentication) decreases security, see Paulo Ebermann post below. When Peter needs to send message to Alice they do analogical steps with peter_to_alice.key and with peter_pointer. With this trivial schema they can send for next 50 years each day 2GB / (50 * 365) = cca 115kB of encrypted data in both directions. If they need more data to send, they simple use larger memory for keys for example with today 2TB harddiscs (1TB keys) is possible to exchange next 50years 60MB/day ! (thats practicaly lots of data for example with using compression its more than hour of high quality voice communication) It Seems to me there is no way for attacker to read encrypted message without keys even if they have infinitely fast computer. because even with infinitely fast computer with brute force they get ever possible message that can fit to length of message, but this is astronomical amount of messages and attacker dont know which of them is actual message. I am right? Is this communication schema really absolutely secure? And if its secure, has this communication method its own name? (I mean XOR encryption is well-known, but whats name of this concrete practical application with use large memories at both communication sides for keys? I am humbly expecting that this application has been invented someone before me :-) ) Note: If its absolutely secure then its amazing because with today low cost large memories it is practicaly much cheeper way of secure communication than expensive quantum cryptography and with equivalent security! EDIT: I think it will be more and more practical in future with lower a lower cost of memories. It can solve secure communication forever. Today you have no certainty if someone succesfuly atack to existing ciphers one year later and make its often expensive implementations unsecure. In many cases before comunication exist step where communicating sides meets personaly, thats time to generate large keys. I think its perfect for military communication for example for communication with submarines which can have installed harddrive with large keys and military central can have harddrive for each submarine they have. It can be also practical in everyday life for example for control your bank account because when you create your account you meet with bank etc.

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  • How to determine if a programming language is verbose or terse?

    - by sunpech
    Programming languages can often be described as verbose or terse. From my understanding, a verbose language is easy to read and understand, while a terse language is concise and neat, but more difficult to read. Should there be other things to consider in the definitions? It seems much of the popular programming languages of today are verbose, and these terms two terms are only used to describe a language as being more or less, relative to than another language. How do we determine if a programming language is more verbose/terse over another? Example: Is C# more verbose than Java?

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  • Question on refactoring and code design

    - by Software Engeneering Learner
    Suppose, I have a class with a constant static final field. Then I want in certain situations that field to be different. It still can be final, because it should be initialized in constructor. My question is, what strategy I should use: add this field value into the constructor create 2 subclasses, replace original field usage with some protected method and override it in subclasses Or create some composite class that will held instance of my class inside and somehow change that value? Which approach should I use and why?

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  • Indie Software Developers - How do I handle taxes?

    - by Connor
    I apologize if this is the wrong site to post on, perhaps someone could point me to the proper place if it is not. Hello, I am 17 years old and currently develop applications/games for Android and iPhone as well as develop internet websites and code a variety of my own projects. I have been very fortunate and have made a large amount of money and continue to make money online to the point where I do not need a stable job, though I'd like to get one after college. I've never held a job anywhere, and have never had to pay taxes. I'm coming into a lot of issues and I am quite confused. I get money from MANY sources- 15 different advertisement networks(!), 4 different payment processors, 5 different affiliate networks and a variety of other sources. All of them pay to different places and at different times (checking account, PayPal, reloadable debit card, ect.) I essentially have a list in a Notepad with names and login information for each source. I have also created a PHP script that uses cURL to grab all the revenue from each service, add it all up, then text me every few hours so I can keep track. It's a mess, but it's working OK, and I can create custom reports (for IRS?). But enough of that, my questions are about taxes in the US, and how indie developers handle it all. I'm at slightly over $250k so far this year, with negligible earnings last year. I have it all stockpiled in a bank account and haven't touched it, I'm a bit scared to. What do I file as? A sole proprietor, a business, just a regular person? How can I handle all of the different revenue sources? (AdSense, CJ, LinkShare) So far none of them have sent me any paperwork on taxes and I've read that I'm supposed to pay taxes quarterly? Do I need paperwork from EACH source to file? Or can I just say I got $x total and that'd be it? What percentage do you pay of total earnings? Average? Should I create an LLC? A corporation? Or stay as a developer? What would be the cheapest options? Could I go to jail? I haven't touched the money except a few dollars to help my parents pay the mortgage once. Any insight would be great. My parents have no idea what I should do, both have no forms of higher education and both have no high school diploma's. They just live day by day with simple jobs. I appreciate any help or experience with this.

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  • Does The College Matter?

    - by Jonathon
    Does it matter all that much about what college you go to, to get a degree in computer programming/computer science? I didn't do all that well in high school, I actually barely graduated with a general High School Diploma. So getting into a decent college could be difficult. Companies won't deny you just because you got your degree at a college they have never heard of or a community college will they?

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  • Haskell vs Erlang for web services

    - by Zachary K
    I am looking to start an experimental project using a functional language and am trying to decide beween Erlang and Haskell, and both have some points that I really like. I like Haskell's strong type system and purity. I have a feeling it will make it easier to write really reliable code. And I think that the power of haskell will make some of what I want to do much easier. On the minus side I get the feeling that some of the Frameworks for doing web stuff on Haskell such as Yesod are not as advanced as their Erlang counter parts. I rather like the Erlang approach to threads and to fault tollerence. I have a feeling that the scalability of Erlang could be a major plus. Which leeds to to my question, what has people's exerience been in implementing web application backends in both Haskell and Erlang. Are there packages for Haskell to provide some of the lightweight threads and actors that one has in Erlang?

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  • Is it bad to join open-source projects as an amateur?

    - by esqew
    I've thought for about six months now that I should join an open-source iPhone or iPad project to hone my skills in Objective-C, but every time I go to do it I see thousands of lines of code on huge projects that I end up convincing myself I would never understand. I always think that my commits would just end up being a hassle for project admins and more senior contributors, so I always back out at the last second. My question essentially is, is it a hassle when an intermediately-experienced programmer joins an open-source project?

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  • MPL 1.1 and APL 2.0 License compatibility

    - by Kenneth Cochran
    I am working a project that is licensed under the MPL 1.1 and would like to incorporate some code that is licensed under the APL 2.0. I know in 2010 Mozilla announced they were updating the MPL to make it more "Apache compatible" among other things. I'm no lawyer. Exactly what part(s) of the MPL 1.1 don't jive with the APL 2.0 and vice versa? The project has very few of its original contributers still actively involved so I doubt I'd be able to contact all of them to get permission to change the license.

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  • Is there a way communicate or measure levels of abstraction?

    - by hydroparadise
    I'll be the first to say that this question is a bit... out there. But here are a couple questions I bear in mind : Is abstraction continuous or discrete? Is there a single unit of abstraction? But I'm not sure those questions are truly answerable or even really makes sence. My naive answer would be something along the lines of abitrarily discrete but not necescarily having a single unit measure. Here's what I mean... Take a Black Labrador; an abstraction that could be made is that a Black Lab is a type of animal. [Animal]<--[Black Lab] A Black Lab is also a type of Dog. [Dog]<--[Black Lab] One way to establish a degree of abstraction is by comparing the two the abstractions. We could say that [Animal] is more abstract than [Dog] in respect to a Black Lab. It just so happens [Animal] can also be used as an abstraction of [Dog] So, we might end up with something like [Animal]<--[Dog]<--[Black Lab] With the model above, one might be inclined to say that there's two hops of abstraction to get from [Black Lab] to [Animal]. But you can't exactly tell somebody they need one level abstraction and reasonalby expect they will come up with [Dog] given they aren't explicity given the options above. If I needed to tell someobody in a single email that they needed an abstract class with out knowing what that abstract class is, is there a way to communaticate a degree of abstraction such that they might end up on Dog instead of Animal? As a side note, what area of study might this type of analysis fall under?

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  • How properly perform passing operation result to View

    - by atomAltera
    I'm developing web site on self made MVC engine. I have actionController that handles operations like register, login, post submit and etc. actionController receives operation name and parameters. Of course it mast handle errors such user with same nick already exists or password is to short about which action handler have to notify user. The question is which is the best way to organize errors, such that View could easily get localized user notification message. I see two ways First one: define error constants like ERR_NICK_BUSY = '1' ERR_NICK_INVALID = '2' ... and localization map local[ERR_NICK_BUSY] = 'User with the same nick already registered' local[ERR_NICK_INVALID ] = 'Nick, you entered is invalid' ... And second one: define abstract constants like ERR_FIELD_BUSY = '1' ERR_FIELD_INVALID = '2' ... and pass them with field name. In this case localization looks like local['nick_'+ERR_FIELD_BUSY] = 'User with the same nick already registered' ... I don't like both this methods. Can you advise something else?

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  • how to get all programming skills. guys help me to become a good programmer [closed]

    - by Dhananjay
    okay guys i dropped out and now self teaching myself programming.i want to be a good programmer.i downloaded c++ primer plus by stephen prata .i thought its a good book but here many peoples are saying that its not a good book.so please suggest me from where i should start.which books i should read..i know little programming just basic not much.but i want to be expert so please suggest books and also tell that in which pattern i should study as i m free 24 hours.should i only study c++ untill i finsh it or side by side other languages too?from which book did u learned it? give some advises/tips. i want to make my own apps and i want to learn web development also.. thank you ?

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  • GPL code allowing non-GPL local copies of nondistributed code

    - by Jason Posit
    I have come across a book that claims that alterations and augmentations to GPL works can be kept close-source as long as these are not redistributed into the wild. Therefore, customizations of websites deriving from GPL packages need not be released under the GPL and developers can earn profit on them by offering their services to their clients while keeping their GPL-based code closed source at the same time. (cf. Chapter 17 of WordPress Plugin Development by Wrox Press). I've never realized this, but essentially, by putting restrictions on redistributable code the GPL says nothing about what can and cannot be done with code which is kept private in terms of the licensing model. Have I understood this correctly?

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