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• I need help with some terminology

  - by Christine

  I'm not a programmer; I'm a freelance writer and researcher. I have a client who'd looking for stats on certain "threats" to the apps market. One of them is cowboy coding. (I know what that means; that's not my question.) Specifically, he wants to see numbers regarding how many apps have failed/crashed/removed because of errors made by, in essence, sloppy coding. (I'm not here to debate the merits of cowboy coding, and whether or not it is sloppy; work with me here.) I've used every possible search term/phrase I can think of, but I can't find any hard numbers, just anecdotal evidence. Have any of you seen any reports that have this kind of data?

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• How do I handle a user story that I complete, but with compromise and need to revisit?

  - by ProfK

  I have just fulfilled (is that a good term?) two user stories out of a new project backlog I have just built. These are user registration and password reset, both requiring mail. I need to implement a substitute mail component because my initial choice, and a normally reliable one, wasn't working. Because I was focused on delivering the user stories, not debugging the mail component, I swapped it out to deliver working code at sprint end. Do I now log a new support issue for the mailer, or 're-insert' these stories into the backlog? If I do the latter, am I not introducing too much tech detail into user stories?

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• How could RDBMSes be considered a fad?

  - by StuperUser

  Completing my Computing A-level in 2003 and getting a degree in Computing in 2007, and learning my trade in a company with a lot of SQL usage, I was brought up on the idea of Relational Databases being used for storage. So, despite being relatively new to development, I was taken-aback to read a comment (on Is LinqPad site quote "Tired of querying in antiquated SQL?" accurate? ) that said: [Some devs] despise [SQL] and think that it and RDBMS are a fad Obviously, a competent dev will use the right tool for the right job and won't create a relational database when e.g. flat file or another solution for storage is appropriate, but RDBMs are useful in a massive number of circumstances, so how could they be considered a fad?

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• Would this violate any copyright issues?

  - by Farhad

  I am currently publishing a paper on skin detection. However, I need to find the appropriate histogram bin size for each colorspace. I recently came upon a paper that published what it found to be the ideal bin size. The paper can be found at: http://www.inf.pucrs.br/~pinho/CG/Trabalhos/DetectaPele/Artigos/OPTIMUM%20COLOR%20SPACES%20FOR%20SKIN%20DETECTION.pdf. I am specifically talking about Table 1. If I cite the source, would it be okay for me to use data from the table? Note that I cannot contact the author of the paper.

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• Is sticking to one language on a particular project a good practice?

  - by Ans

  I'm developing a pipeline for processing text that will go into production. The question I keep asking myself is: should I stick to one language for the project when I'm looking for a tool to do a particular task (e.g. NLTK, PDFMiner, CLD, CRFsuite, etc.)? Or is it OK to mix and match languages on the project? So I pick the best tool regardless of what language it's written in (e.g. OpenNLP, ParsCit, poppler, CFR++, etc.) and warp (wrap) my code around it? Note, I am not asking about should a developer stick to just one language for their career.

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• What happened to VM based deployments?

  - by user128670

  Watched some MountainWest RubyConf 2014 talks and noticed an interesting theme. Many dynamic programming environments back in the old days used to be self-contained VM images, e.g. SmallTalk, GemStone/S. One could checkpoint, modify, and ship these images wholesale and have it up and running with very little effort. Fast forward to now and I'm still using Make files to configure and install binaries. What happened?

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• Windows Mobile Interview Question Categories

  - by Ramesh Patel

  I need to set categories for interviewing candidates for Windows Mobile Development. Like for ASP.NET, we can have OOPS .NET Framework (CLR, BCL, MSIL etc) Javascript, jQuery Data Controls ADO.NET SQL Server For Windows Mobile, which are categories that should be included? Being specific to our current product, it has not UI and will run in background. Security is the first thing to take into account. It is a SPY kind of application that will keep track of user activity. It can be used by companies to monotor their employees.

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• Donald Ferguson says end-user programming is next big thing. Is it?

  - by Joris Meys

  You can guess how I came to ask this question... Anyway : http://www.bbc.co.uk/news/business-11944966 Donald Ferguson claiming that his websphere was his biggest disaster and proclaiming that end-user programming will be the way forward. This genuinely spurs the question : what with current programming languages. Honestly, I don't think that end-user programming will go much beyond a rather rigid template where you can build some apps around. If you see how many people actually manage to understand the basic functionality of functions in EXCEL... Plus, I fail to see how complex and performant systems can be built in such an end-user programming language ( Visual Basic, anyone?) Nice to play around with, but for many applications they're just not the thing. So no worries for the old languages if you ask me. What's your ideas?

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• Please recommend a good book on general IT for junior developer

  - by Rachel

  I have just got a job as a junior java developer and I am finding learning the code fine as I taught myself to pass the interview tests, trouble is I have a biology degree and know little about general IT and computer /network jargon. I don't want to be seen as a total idiot and non - techie so please can you recommend a book I can read / study to quickly increase my general background knowledge so that I can compete on a level with IT graduates!

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• Windows.Threading.Dispatcher' does not contain a definition for 'RunAsync' and no extension method 'RunAsync' accepting a first argument of type

  - by suhail mehdi

  public MainPage() { InitializeComponent(); offline.Visibility = (Network.IsConnected ? Visibility.Collapsed : Visibility.Visible); Network.InternetConnectionChanged += async (s, e) => { await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () => { offline.Visibility = (e.IsConnected ? Visibility.Collapsed : Visibility.Visible); }); }; }

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• Generic and type safe I/O model in any language

  - by Eduardo León

  I am looking for an I/O model, in any programming language, that is generic and type safe. By genericity, I mean there should not be separate functions for performing the same operations on different devices (read_file, read_socket, read_terminal). Instead, a single read operation works on all read-able devices, a single write operation works on all write-able devices, and so on. By type safety, I mean operations that do not make sense should not even be expressible in first place. Using the read operation on a non-read-able device ought to cause a type error at compile time, similarly for using the write operation on a non-write-able device, and so on. Is there any generic and type safe I/O model?

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• Ubuntu, OpenSuse, the world of linux for a web-developer

  - by SonofWatson

  I'm learning web development. My main OS is windows 7 but I've used Linux and currently dual-booting with Ubuntu. My Linux knowledge however, is pretty limited. I can work with the command line on simple tasks but that's pretty much it. I don't do any shell scripting, don't know very well the most important commands, nor the system in general. I am interested in web development. Should I get myself familiarized more with Linux ? Is it a must for future job positions considering my field of interest?

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• MVC: Why put the business logic in the model? What happens when I've multiple types of storage?

  - by Steffen Winkler

  I always thought that the business logic has to be in the controller and that the controller, since it is the 'middle' part, stays static and that the model/view have to be capsuled via interfaces, that way you could change the business logic without affecting anything else, program multiple Models (one for each database/type of storage) and a dozens of views (for different platforms for example). Now I read in this question that you should always put the business logic into the model and that the controller is deeply connected with the view. To me, that doesn't really make sense and implies that each time I want to have the means of supporting another database/type of storage I've to rewrite my whole model including the business logic. And if I want another view, I've to rewrite both the view and the controller. May someone explain why that is or if I went wrong somewhere? Currently, that whole thing doesn't really make sense to me.

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• Best practices for logging user actions in production

  - by anthonypliu

  I was planning on logging a lot of different stuff in my production environment, things like when a user: Logs In, Logs Off Change Profile Edit Account settings Change password ... etc Is this a good practice to do on a production enviornment? Also what is a good way to log all this. I am currently using the following code block to log to: public void LogMessageToFile(string msg) { System.IO.StreamWriter sw = System.IO.File.AppendText( GetTempPath() + @"MyLogFile.txt"); try { string logLine = System.String.Format( "{0:G}: {1}.", System.DateTime.Now, msg); sw.WriteLine(logLine); } finally { sw.Close(); } } Will this be ok for production? My application is very new so im not expecting millions of users right away or anything, looking for the best practices to keeping track of actions on a website or if its even best practice to.

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• Email Service or CRM

  - by MG1

  I am creating a process for a client who is a chapel. They have people who sign up to receive notifications of a death anniversary. I exported a CSV from the db, imported it into Mailchimp and I was about to launch a Mailchimp automation based on a date. Not I realized that are many instances where the same person singed up for multiple death reminders. Mailchimp doesn't allow for duplicate email addresses in one list. Is there another service or application that I can use for this?

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• Structuring database for multi-object "activity" and "following" functionalities

  - by romaninsh

  I am working on a web application which operate with different types of objects such as user, profiles, pages etc. All objects have unique object_id. When objects interact it may produce "activity", such as user posting on the page or profile. Activity may be related to multiple objects through their object_id. Users may also follow "objects" and they need to be able to see stream of relevant activity. Could you provide me with some data structure suggestions which would be efficient and scalable? My goal is to show activity limited to the objects which user is following I am not limited by relational databases. Update As I'm getting advices on ORM and how index things, I'd like to again, stress my question. According to my current design model the database structure looks like this: As you can see - it's quite easy to implement database like that. Activity and Follower tables do contain much larger amount of records than the upper level but it's tolerable. But when it comes for me to create a "timeline" table, it becomes a nightmare. For every user I need to reference all the object activities which he follows. In terms of records it easily gets out of control. Please suggest me how to change this structure to avoid timeline creation and also be abel to quickly retrieve activity for any given user. Thanks.

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• In rails, what defines unit testing as opposed to other kinds of testing

  - by junky

  Initially I thought this was simple: unit testing for models with other testing such as integration for controller and browser testing for views. But more recently I've seen a lot of references to unit testing that doesn't seem to exactly follow this format. Is it possible to have a unit test of a controller? Does that mean that just one method is called? What's the distinction? What does unit testing really means in my rails world?

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• Geographically limited / gradual release process

  - by daniel.sedlacek

  I am looking for more information on a gradual release process - that is when you release new version of a software only to certain set of end users, mostly geographically limited (or limited by a reach of particular server). Google seems to be blind to this term - that indicates that's not how it's called. What's the name then? EDIT: An example of what I mean is when Facebook rolled out new image galleries they were first visible to certain users only, then to whole US and then to the rest of the world.

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• Custom map solution using openstreetmap

  - by LearneR

  I want to work in real estate portal and I need to filter the result and list the properties in map view using openstreetmap (Client requirement). They gave this reference site . I started on yesterday only but the documentation and all I am not able to understand (as a beginner). Can we implement like this using openstreetmap? Where should I start at first? Also I have seen some of the users recommended openlayers, leaflet, mapquest in help answers. Which one is best for my requirement openstreetmap or thirdparty api? Please guide me to complete this task. I don't know where I am and where I have to start?

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• In which cases Robolectric is a relevant solution?

  - by Francis Toth

  As you may now, Robolectric is a framework that provides stubs for Android objects, in order to make tests runnable outside the Dalvik environment. My concern is that, by doing this, one can fake a third party library, which is, I believe, not a good practice (it should be encapsulated instead). If you make assumptions about an interface you don't own, which is changed once your test has been written, you won't be always noticed about the modifications. This can lead to a misunderstanding between your implementations and the interface they depends on. In addition, Android use mostly inheritance over interfaces which limits contract testing. So here's my question: Are there situations when Robolectric is the way to go? Here are some links you can check for further information: test-doubles-with-mockito in-brief-contract-tests

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• Rails solution for mobile-specific content filter?

  - by Damien Roche

  To note, I'm not interested in simply 'hiding' content for mobile devices, I want to filter out that content completely. I'm also not trying to address the issue by building a mobile specific interface (mob.example.com). There was another question regarding something similar: How do I prevent useless content load on the page in responsive design? The solution, in that post, was to set a session during the initial request, and then use the session to filter content on subsequent requests. I primarily develop in Rails, and I'm wondering if there are any gems or ruby-specific solutions to this problem?

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• Circular dependency and object creation when attempting DDD

  - by Matthew

  I have a domain where an Organization has People. Organization Entity public class Organization { private readonly List<Person> _people = new List<Person>(); public Person CreatePerson(string name) { var person = new Person(organization, name); _people.Add(person); return person; } public IEnumerable<Person> People { get { return _people; } } } Person Entity public class Person { public Person(Organization organization, string name) { if (organization == null) { throw new ArgumentNullException("organization"); } Organization = organization; Name = name; } public Organization { get; private set; } public Name { get; private set; } } The rule for this relationship is that a Person must belong to exactly one Organization. The invariants I want to guarantee are: A person must have an organization this is enforced via the Person's constuctor An organization must know of its people this is why the Organization has a CreatePerson method A person must belong to only one organization this is why the organization's people list is not publicly mutable (ignoring the casting to List, maybe ToEnumerable can enforce that, not too concerned about it though) What I want out of this is that if a person is created, that the organization knows about its creation. However, the problem with the model currently is that you are able to create a person without ever adding it to the organizations collection. Here's a failing unit-test to describe my problem [Test] public void AnOrganizationMustKnowOfItsPeople() { var organization = new Organization(); var person = new Person(organization, "Steve McQueen"); CollectionAssert.Contains(organization.People, person); } What is the most idiomatic way to enforce the invariants and the circular relationship?

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• Correct For Loop Design

  - by Yttrill

  What is the correct design for a for loop? Felix currently uses if len a > 0 do for var i in 0 upto len a - 1 do println a.[i]; done done which is inclusive of the upper bound. This is necessary to support the full range of values of a typical integer type. However the for loop shown does not support zero length arrays, hence the special test, nor will the subtraction of 1 work convincingly if the length of the array is equal to the number of integers. (I say convincingly because it may be that 0 - 1 = maxval: this is true in C for unsigned int, but are you sure it is true for unsigned char without thinking carefully about integral promotions?) The actual implementation of the for loop by my compiler does correctly handle 0 but this requires two tests to implement the loop: continue: if not (i <= bound) goto break body if i == bound goto break ++i goto continue break: Throw in the hand coded zero check in the array example and three tests are needed. If the loop were exclusive it would handle zero properly, avoiding the special test, but there'd be no way to express the upper bound of an array with maximum size. Note the C way of doing this: for(i=0; predicate(i); increment(i)) has the same problem. The predicate is tested after the increment, but the terminating increment is not universally valid! There is a general argument that a simple exclusive loop is enough: promote the index to a large type to prevent overflow, and assume no one will ever loop to the maximum value of this type.. but I'm not entirely convinced: if you promoted to C's size_t and looped from the second largest value to the largest you'd get an infinite loop!

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• Good abbreviations for XML ... things

  - by Peter Turner

  I've never been very good at maintaining a coherent bunch of variable names for interfacing with XML files because I never name the variables in my interfaces the same way across my source. There are Elements, Attributes, Documents, NodeLists, Nodes, DocumentFragments and other stuff. What's a good scheme for keeping track of this stuff as variables? Is there a standard in regard to Hungarian notation? Do you even put anything signifying that the data is actually XML, is this bad practice?

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• How do you approach database design?

  - by bron

  I am primarily a web developer and I have a couple of personal projects which I want to kick off. One thing that is bugging me is database design. I have gone through in school db normalization and stuff like that but it has been a couple of years ago and I have never had experience with relational database design except for school. So how you do you approach database from a web app perspective? How do you begin and what do you look out for? What are flags for caution?

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