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• Difference between Windows and Linux development environments?

  - by Ryan

  I have an interview coming up soon for a Business Analyst position and the recruiter mentioned some feedback from a prior candidate that was interviewed who said the interviewers asked him what the difference between a Windows and Linux development environment was. Are there some high level things I need to be aware of from a business point of view when working with a development team or designing an application on Windows vs Linux?

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• Does it make sense to use ORM in Android development?

  - by Heinzi

  Does it make sense to use an ORM in Android development or is the framework optimized for a tighter coupling between the UI and the DB layer? Background: I've just started with Android development, and my first instinct (coming from a .net background) was to look for a small object-relational mapper and other tools that help reduce boilerplate clode (e.g. POJOs + OrmLite + Lombok). However, while developing my first toy application I stumbled upon a UI class that explicitly requires a database cursor: AlphabetIndexer. That made me wonder if maybe the Android library is not suited for a strict decoupling of UI and DB layer and that I will miss out on a lot of useful, time-saving features if I try to use POJOs everywhere (instead of direct database access). Clarification: I'm quite aware of the advantages of using ORM in general, I'm specifically interested in how well the Android class library plays along with it.

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• Will taking two years off for school destroy my 4 year old development career?

  - by rsteckly

  Hi, I know some people have asked about getting back into programming after a break and this is a potential duplicate. I just am in a position where I can go back to school in Stat/Applied Math. But I'm very worried about the impact it will have on my career and ability to find a job afterwards. I have 3 years experience in .NET on top of a couple of years in PHP. Right now, I'm a senior software engineer. Do you think taking two years off to do math is going to dramatically hurt my marketability?

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• Internationalization of non-english application

  - by Jacket

  I know there are lots of posts for internationalization, but this is something I didn't found while searching. I have a PHP Web application, which is pretty big right now. It's developed actively for 4 years and wasn't built with internationalization in mind. Text is everywhere - in plain HTML, in PHP variables, in echo's, in the DB... Now I'm familiar with the concept of gettext and this is what i plan to use for the internationalization project of the application. However the app is not written in English and here is my question: Should I first translate everything to English while wrapping every string in gettext() function, or I can use my native language as a base? P.S. also any quick suggestions (links maybe) on making my life easier with the whole i18n project will be greatly appreciated!

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• An XML file or Database?

  - by webnoob

  I am re-writing a section of my site and am trying to decide how much of a rewrite this will be. At the moment I have a web service feed that generates an xml once per day. I then use this xml file on my website to generate the general structure. I am trying to decide if this information should be located in the database or stay in the xml file. The file can range from 4mb - 12mb. The files depth can go on and on so I have to recurse to find the data I want. I use the .NET serializer classes and store the serialized file in a global variable to avoid re-serializing it each time the page is loaded. My reasons for thinking a database would be better are: I would know exactly where I am in the file by using an internal ID so I wouldn't have to recurse the file to get information. I wouldn't have to load / serialize the XML and could just use my already open database connections. Searching for the data in the file would be quicker(?) as I would just perform an SQL query rather than re-cursing the file. Has anyone got any ideas which is better and which option uses more resources on the server or be quicker? EDIT: The file is read every time the web page is loaded (although only serialized once). It isn't written to by standard users (only by an admin task that runs in the middle of the night). This is my initial investigation before mocking up.

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• Quality Assurance & Quality Control = verification & validation?

  - by user970696

  According to a book (page below), reviewing e.g. design (verification activity) is quality assurance. I would not agree, I would say its quality control because we are checking the conformance to specification, plans and detecting deviations (defects) as we do in quality control. But what would be an example of QA then? Could you give me a clear example that proves/disproves what is this book saying? Software Testing: Srinisvasan Desikan, Gopalaswamy Ramesh

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• What development terms come from the construction industry?

  - by Renesis

  When talking with colleagues about software design and development principles, I've noticed one of the most common sources for analogies is the construction industry. It would be quite useful to have a list of what programming/development terms and concepts are borrowed from construction industry? (And please provide a description or experiences regarding that topic.) [Credit to Programming concepts taken from the arts and humanities for the idea]

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• Visualize flowchart diagram with multiple end symbols

  - by platzhirsch

  I am looking for a standardize way to visualize the following hierarchical logic: The state of the thread is represented by the answers to the hierarchical set of question You can read this listing like a flowchart, you iterate over the questions decide, go one step deeper and so on. Therefore I thought the best way to visualize it, using a flowchart. The problem is, in this hierarchical set it is possible to end in more than one state and its totally valid. I have never seen a flowchart where you can enter more than one state. Is it still possible and I am missing the right symbol to present this logic or are flowchart not fitting anyway? What other graphical representation could I use, is there something fitting in UML? A non-deterministic state machine seems not to be intuitive enough, transfering it into a deterministic state machine would result in to many states, and so on.

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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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• Coding in large chunks ... Code verification skills

  - by Andrew

  As a follow up to my prev question: What is the best aproach for coding in a slow compilation environment To recap: I am stuck with a large software system with which a TDD ideology of "test often" does not work. And to make it even worse the features like pre-compiled headers/multi-threaded compilation/incremental linking, etc is not available to me - hence I think that the best way out would be to add the extensive logging into the system and to start "coding in large chunks", which I understand as code for a two-three hours first (as opposed to 15-20 mins in TDD) - thoroughly eyeball the code for a 15 minutes and only after all that do the compilation and run the tests. As I have been doing TDD for a quite a while, my code eyeballing / code verification skills got rusty (you don't really need this that much if you can quickly verify what you've done in 5 seconds by running a test or two) - so I am after a recommendations on how to learn these source code verification/error spotting skills again. I know I was able to do that easily some 5-10 years ago when I din't have much support from the compiler/unit testing tools I had until recently, thus there should be a way to get back to the basics.

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• Are CQRS/DDD/Event Sourcing and REST compatible?

  - by Robin Green

  REST seems to promote the idea of a canonical URL for a resource, and PUTing/POSTing back a modified representation of that resource in order to change it. However, with CQRS - Command Query Responsibility Segregation - one can theoretically have a completely different "API" for reading and for writing, which seems to conflict with the REST ideal of one URL for a resource, and no RPC-style "verbs inside the request body". DDD and Event Sourcing sometimes go together with CQRS, which is why I mention them in this question. So, can CQRS be used together with REST? Or is it against the REST way of doing things? What about DDD? And Event Sourcing? Can they be used with REST?

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• How to deal with static utility classes when designing for testability

  - by Benedikt

  We are trying to design our system to be testable and in most parts developed using TDD. Currently we are trying to solve the following problem: In various places it is necessary for us to use static helper methods like ImageIO and URLEncoder (both standard Java API) and various other libraries that consist mostly of static methods (like the Apache Commons libraries). But it is extremely difficult to test those methods that use such static helper classes. I have several ideas for solving this problem: Use a mock framework that can mock static classes (like PowerMock). This may be the simplest solution but somehow feels like giving up. Create instantiable wrapper classes around all those static utilities so they can be injected into the classes that use them. This sounds like a relatively clean solution but I fear we'll end up creating an awful lot of those wrapper classes. Extract every call to these static helper classes into a function that can be overridden and test a subclass of the class I actually want to test. But I keep thinking that this just has to be a problem that many people have to face when doing TDD - so there must already be solutions for this problem. What is the best strategy to keep classes that use these static helpers testable?

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• Chess as a team building exercise for software developers

  - by maple_shaft

  The last place I worked wasn't a particularly great place and there were more than a few nights where we were working late into the evening trying to meet our sprints. The team while stressed out got pretty close and people started bringing in little mind teasers and puzzles, just something we would all play around with and try to solve while a build/deploy was running for the test environment, or while we were waiting for the integration test run to finish. Eventually it turned into people bringing chess boards in and setting them at their desks. We would play by email sending each other moves in chess notation, but at a very casual pace, with games lasting sometimes two or three days. Management tolerated this when we were putting in overtime, but as things were being managed better and people weren't working much more than 40/wk, they started cracking down on this and told us that we weren't allowed to have chess boards at our desks, although they were okay with the puzzle games. What are the pros and cons in your opinion of allowing chess during software development lull time?

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• Which web algorithms book to get ?

  - by fjxx

  I am currently undecided between which of the following web algorithms book to buy: 1) Algorithms of the Intelligent web by Marmanis 2) Collective Intelligence by Alag Both feature code in Java; Marmanis' book delves deeper into the core algorithms while Alag's book discusses more APIs including WEKA. I have already read Programming Collective Intelligence by Segaran and enjoyed it. Any comments on these books or any other recommendations are welcome.

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• Embedded linux Development learning

  - by user1797375

  I come from a windows background and i am proficient with the .net platform. For work, i need to bring up a custom embedded system platform. We have bought the pandaboard ES as the test platform. The application is to stream images over the wifi. If you think about it, we are building something similar to a netgear router - the only difference being when you log into the device it serves images. Because my background is in windows i am not quite sure how to start off with embedded linux development. in reading through various sites i have come to the conclusion that going to linux as development host is the best option. Can some one point to me in the right direction regarding the set up. I have a windows machine that will be used for development purposes. I can either do a virtual box or setup a partition for linux. But the finer details are what throwing me off..what i need to know is 1) once i install linux what other software do I need - Code blocks, 2) what about toolchain 3) How to debug - through serial port ? 4) Is there a way to send the image built directly to the CF card? Thanks

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• Is INT_MIN-1 an underflow or overflow?

  - by Johannes Schaub - litb

  I seem to remember that I was reading that underflow means you have a too small magnitude that cannot be presented anymore in a type overflow means you have a too large magnitude that cannot be presented anymore in a type However, in practice I perceive that the terms are used such that underflow means you have a too small value that cannot be presented anymore in a type overflow means you have a too large value that cannot be presented anymore in a type What is the correct meaning to use here? Are the terms defined differently for integer and floating point types?

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• Getting a solid understanding of Linux fundamentals

  - by JoshEarl

  I'm delving into the Linux world again as a diversion from my Microsoft-centric day job, and every time I tackle a new project I find it a frustrating exercise in trial and error. One thing that I always try to do when learning something new is figure out what the big pieces are and how they work together. I haven't yet come across a resource that explains Linux at this level. Resources seem to be either aimed at the barely computer literate crowd (Linux doesn't bite. Promise!) or the just compile the kernel and make your own distro crowd. I'm looking for a "JavaScript: The Good Parts" type of road map that doesn't necessarily answer all my questions so much as help me understand what questions I need to be asking. Any suggestions?

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• Best in-memory cache of DB objects for Silverlight [closed]

  - by Jon

  Hi, I'd like to set up a cache of database objects (i.e. rows in a table) in memory in silverlight, which I'll do using WCF and linq-to-sql. Once I have the objects in memory, I'm planning on using MSMQ to receive new objects whenever they have been modified. It's a somewhat complex approach but the goal is to reduce trips to the database and allow instant data communication between Silverlight applications that are connected to the MSMQ. My Silverlight applications are meant to be long-running and the amount of data to be cached will not be large. I'm planning on saving the in-memory cache using local storage. Anyway, in order to process the updated objects that come in, I'd like to know if the user has changed the existing object. Could I use some event relating to data-binding to set a flag indicating that the object has changes? Maybe there's a better way to do the cache entirely? Thanks!

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• How to future-proof my touch-enabled web application?

  - by Rice Flour Cookies

  I recently went out and purchased a touch-screen monitor with the intention of learning how to program touch-enabled web applications. I had reviewed the MDN documentation about touch events, as well as the W3C specification. To get started, I wrote a very short test page with two event handlers: one for the mousedown event and one for the touchstart event. I fired up the web page in IE and touched the document and found that only the mousedown event fired. I saw the same behavior with Firefox, only to find out later that Firefox can be set to enable the touchstart event using about:config. When touch events are enabled, the touchstart event fires, but not mousedown. Chrome was even stranger: it fired both events when I touched the document: touchstart and mousedown, in that order. Only on my Android phone does it appear to be the case that only the touchstart event fires when I touch the document. I did a a Google search and ended up on two interesting pages. First, I found the page on CanIUse for touch events: http://caniuse.com/#feat=touch Can I Use clearly indicates that IE does not support touch events as of this writing, and Firefox only supports touch events if they are manually enabled. Furthermore, all four browsers I mentioned treat the touch in a completely different way. It boils down to this: IE: simulated mouse click Firefox with touch disabled: simulated mouse click Firefox with touch enabled: touch event Chrome: touch event and simulated mouse click Android: touch event What is more frustrating is that Google also found a Microsoft page called RethinkIE. RethinkIE brags about touch support in IE; as a matter of fact, one of their slogans is "Touch the Web". It links to a number of touch-based application. I followed some of these links, and as best I can tell, it's just like CanIUse described; no proper touch support; just simulated mouse clicks. The MDN (https://developer.mozilla.org/en-US/docs/Web/API/Touch) and W3C (http://www.w3.org/TR/touch-events/) documentation describe a far richer interface; an interface that doesn't just simulate mouse clicks, but keeps track of multiple touches at once, the contact area, rotation, and force of each touch, and unique identifiers for each touch so that they can be tracked individually. I don't see how simulated mouse clicks can ever touch the above described functionality, which, once again, is part of the W3C specification, although it is listed as "non-normative", meaning that a browser can claim to be standards-compliant without implementing it. (Why bother making it part of the standard, then?) What motivated my research is that I've written an HTML5 application that doesn't work on Android because Android doesn't fire mouse events. I'm now afraid to try to implement touch for my application because the browsers all behave so differently. I imagine that at some time in the future, the browsers might start handling touch similarly, but how can I tell how they might be handled in the future short of writing code to handle the behavior of each individual browser? Is it possible to write code today that will work with touch-enabled browsers for years to come? If so, how?

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• Learning django by example source code (not examples)

  - by Bryce

  I'm seeking a nice complete open source django application to study and learn best practices from, or even use as a template. The tutorials only go so far, and django is super flexible which can lead one to paining themselves into a corner. Ideally such a template / example would: Ignore django admin, and implement full CRUD outside the admin. Be built like a large application in terms of best practices and patterns. Have a unit test Use at least one package (e.g. twitter integration or threaded comments) Implement some AJAX or Comet See also: Learning Django by example

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• What language should I use for making a cross platform library?

  - by Andrei

  I want to build a SyncML parsing library (no UI) which should be able to build up messages based on information provided by the host application, fed in by the library's methods. Also, the library should to be able to do callbacks to methods in the host application. I want to be able to compile this and have it available on as many platforms as possible: Windows, Windows Phone 7 OS, OSX, iOS, Linux, Android, BlackBerry. Basically as many platforms as possible. The priority is to have this available on mobile devices. Questions: What setup should I use? (programming languages, compilers, IDE etc.) How would I compile this library for these different platforms and how would I connect to it? Any other info? e.g. articles that cover the subject of cross-platform development? I haven't done this sort of a cross-platform project before, so any available information to put me in the right direction would be welcomed. Myself, I have a background in C#/.NET and Objective-C.

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• Misunderstanding Scope in JavaScript?

  - by Jeff

  I've seen a few other developers talk about binding scope in JavaScript but it has always seemed to me like this is an inaccurate phrase. The Function.prototype.call and Function.prototype.apply don't pass scope around between two methods; they change the caller of the function - two very different things. For example: function outer() { var item = { foo: 'foo' }; var bar = 'bar'; inner.apply(item, null); } function inner() { console.log(this.foo); //foo console.log(bar); //ReferenceError: bar is not defined } If the scope of outer was really passed into inner, I would expect that inner would be able to access bar, but it can't. bar was in scope in outer and it is out of scope in inner. Hence, the scope wasn't passed. Even the Mozilla docs don't mention anything about passing scope: Calls a function with a given this value and arguments provided as an array. Am I misunderstanding scope or specifically scope as it applies to JavaScript? Or is it these other developers that are misunderstanding it?

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• Is there an alternative to Google Code Search?

  - by blunders

  Per the Official Google Blog: Code Search, which was designed to help people search for open source code all over the web, will be shut down along with the Code Search API on January 15, 2012. Google Code Search is now gone, and since that makes it much harder to understand the features it presented, here's my attempt to render them via information I gathered from a cache of the page for the Search Options: The "In Search Box" just notes the syntax to type the command directly in the main search box instead of using the advance search interface. Package (In Search Box: "package:linux-2.6") Language (In Search Box: "lang:c++") (OPTIONS: any language, actionscript, ada, applescript, asp, assembly, autoconf, automake, awk, basic, bat, c, c#, c++, caja, cobol, coldfusion, configure, css, d, eiffel, erlang, fortran, go, haskell, inform, java, java, javascript, jsp, lex, limbo, lisp, lolcode, lua, m4, makefile, maple, mathematica, matlab, messagecatalog, modula2, modula3, objectivec, ocaml, pascal, perl, php, pod, prolog, proto, python, python, r, rebol, ruby, sas, scheme, scilab, sgml, shell, smalltalk, sml, sql, svg, tcl, tex, texinfo, troff, verilog, vhdl, vim, xslt, xul, yacc) File (In Search Box: "file:^.*.java$") Class (In Search Box: "class:HashMap") Function (In Search Box: "function:toString") License (In Search Box: "license:mozilla") (OPTIONS: null/any-license, aladdin/Aladdin-Public-License, artistic/Artistic-License, apache/Apache-License, apple/Apple-Public-Source-License, bsd/BSD-License, cpl/Common-Public-License, epl/Eclipse-Public-License, agpl/GNU-Affero-General-Public-License, gpl/GNU-General-Public-License, lgpl/GNU-Lesser-General-Public-License, disclaimer/Historical-Permission-Notice-and-Disclaimer, ibm/IBM-Public-License, lucent/Lucent-Public-License, mit/MIT-License, mozilla/Mozilla-Public-License, nasa/NASA-Open-Source-Agreement, python/Python-Software-Foundation-License, qpl/Q-Public-License, sleepycat/Sleepycat-License, zope/Zope-Public-License) Case Sensitive (In Search Box: "case:no") (OPTIONS: yes, no) Also of use in understanding the search tool would be the still live FAQs page for Google Code Search. Is there any code search engine that would fully replace Google Code Search's features?

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• What is the meaning of the sentence "we wanted it to be compiled so it’s not burning CPU doing the wrong stuff."

  - by user2434

  I was reading this article. It has the following paragraph. And did Scala turn out to be fast? Well, what’s your definition of fast? About as fast as Java. It doesn’t have to be as fast as C or Assembly. Python is not significantly faster than Ruby. We wanted to do more with fewer machines, taking better advantage of concurrency; we wanted it to be compiled so it’s not burning CPU doing the wrong stuff. I am looking for the meaning of the last sentence. How will interpreted language make the CPU do "wrong" stuff ?

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• Explain Model View Controller

  - by Channel72

  My experience with developing dynamic websites is limited mostly to Java servlets. I've used Tomcat to develop various Java servlets, and I wouldn't hesitate to say that I'm reasonably proficient with this technology, as well as with client-side HTML/CSS/Javascript for the front-end. When I think "dynamic website", I think: user requests a URL with a query string, server receives the query, and then proceeds to output HTML dynamically in order to respond to the query. This often involves communication with a database in order to fetch requested data for display. This is basically the idea behind the doGet method of a Java HttpServlet. But these days, I'm hearing more and more about newer frameworks such as Django and Ruby on Rails, all of which take advantage of the "Model View Controller" architecture. I've read various articles which explain MVC, but I'm having trouble really understanding the benefits. I understand that the general idea is to separate business logic from UI logic, but I fail to see how this is anything really different from normal web programming. Web programming, by it's very nature, forces you to separate business logic (back-end server-side programming) from UI programming (client-side HTML or Javascript), because the two exist in entirely different spheres of programming. Question: What does MVC offer over something like a Java servlet, and more importantly, what exactly is MVC and how is it different from what you would normally do to develop a dynamic website using a more traditional approach such as a Java servlet (or even something older like CGI). If possible, when explaining MVC, please provide an example which illustrates how MVC is applied to the web development process, and how it is beneficial.

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