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• What's the term for re-implementing an old API in terms of a newer API

  - by dodgy_coder

  The reason for doing it is to solve the case when a newer API is no longer backwards compatible with an older API. To explain, just say that there is an old API v1.0. The maker of this API decides it is broken and works on a new API v1.1 that intentionally breaks compatibility with the old API v1.0. Now, any programs written against the old API cannot be recompiled as-is with the new API. Then lets say there is a large app written against the old API and the developer doesn't have access to the source code. A solution would be to re-implement a "custom" old API v1.0 in terms of the new API v1.1 calls. So the "custom" v1.0 API is actually keeping the same interface/methods as the v1.0 API but inside its implementation it is actually making calls to the new API v1.1 methods. So the large app can be then compiled and linked against the "custom" v1.0 API and the new v1.1 API without any major source code changes. Is there a term for this practice? There's a recent example of this happening in Jamie Zawinski's port of XScreenSaver to the iPhone - he re-implemented the OpenGL 1.3 API in terms of the OpenGL ES 1.1 API. In this case, OpenGL 1.3 represents the "old" API and OpenGL ES 1.1 represents the "new" API.

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• Low latency technologies for c++, c# and java?

  - by James

  I've been reading job descriptions and many mention 'low latency'. However, I wondered if someone could clarify what type of technologies this would refer to? One of the adverts mentioned 'ACE' which I googled to find out was some CISCO telephony technology. If you were hiring someone for a low latency role, what would you use as a checklist for ensuring they knew about low latency programming? I'm using this to learn more about low latency programming myself.

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• Cheap, Awesome, Programmer-friendly City in Europe for 1 year Study Hiatus?

  - by Gonjasufi

  Next year I'll be 21. I'll have 3 years of professional experience under my belt (with a one year break as a soldier). I'm planning to take 2 to 3 years off. Instead of going to a university I'm planning to work on personal projects and learn on my own. I'm looking for suggestions of great, cheap, programmer-friendly (e.g. lots of cafes, ordered food, parks, blazing fast internet connection, wifi, lots of people that speak English) cities around the world, (and specifically in Europe as I also have european citizenship). If you can supply with an estimate cost of living for that city, or a site for comparisons that will also be great. edit: I'm living in Tel Aviv, ~20 highest cost of living city in the world, so statistically speaking almost all the cities are cheaper.

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• How to detect two moving shapes overlapped?

  - by user1389813

  Given a list of circles with its coordinates (x and y) that are moving every second in different direction (South-East, South-West, North-East and North-West), and the circle will change direction if it hits the wall sort of like bouncing, so how do we detect if any of them collide or overlap with each other ? I am not sure if we can use some data structures like a Binary Search Tree because since all the coordinates vary every seconds, so the tree will have to re-build accordingly. Or can we use Vertical Sweep Line Algorithm each time ? Any ideas on how to do this in a efficient way ?

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• What principles does your software engineering or development organization follow?

  - by user11347

  What principles does your software engineering or development organization follow? I am very interested in seeing a list of principles from someone who works at a company where these principles are discussed, published, followed, etc. The closest I have seen to a principles-based engineering organization are companies which are agile and follow the agile principles. Here is a list of Marick's values/challenges: http://www.agilejourneyman.com/2010/02/4-challenges-and-5-guiding-values-of.html I am looking for pointers to more stuff like this. Ideally, I'd like to hear from people who have actually implemented a principles-based approach in their organization.

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• Can I trust the Basic schedule equation?

  - by Steve Campbell

  I've been reading Steve McConnell's demystifying the black art of estimating book, and he gives an equation for estimating nominal schedule based on Person-months of effort: ScheduleInMonths = 3.0 x EffortInMonths ^ (1/3) Per the book, this is very accurate (within 25%), although the 3.0 factor above varies depending on your organization (typically between 2 and 4). It is supposedly easy to use historical projects in your organization to derive an appropriate factor for your use. I am trying to reconcile the equation against Agile methods, using 2-6 week cycles which are often mini-projects that have a working deliverable at the end. If I have a team of 5 developers over 4 weeks (1 month), then EffortInMonths = 5 Person Months. The algorithm then outputs a schedule of 3.0 x 5^(1/3) = 5 months. 5 months is much more than 25% different than 1 month. If I lower the 3.0 factor to 0.6, then the algorthim works (outputs a schedule of approx 1 month). The lowest possible factor mentioned in the book through is 2.0. Whats going on here? I want to trust this equation for estimating a "traditional" non-agile project, but I cannot trust it when it does not reconcile with my (agile) experience. Can someone help me understand?

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• Task ownership with Wordpress - CSS - Designer or Developer?

  - by Syed Absar

  We have a dispute regarding who owns which tasks when it comes to the CSS on our live site. Our designer argues that he is not responsible to log-in to word press and modify the css or use ftp for any changes because that's not his job description while developer argues that since it is css, it belongs to designer and that he is to update the changes to the server and then compare and correct the output. I'd like experienced people working in professional development environment to put a light on this scenario. I'm not sure if this is the right place to ask this question, or is there a separate forum for business development or project management specific questions?

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• Technology stack for CRUD apps [closed]

  - by Panoy

  In the past years, I have been using VB6 + MySQL when developing CRUD applications. Now I am currently learning how to develop web applications, as my plan is to go through the "browser/web app" path every time I build a CRUD app. I'm leaning on Ruby on Rails + MySQL/PostgreSQL/any NoSQL database now. I would like to know what other technology/tools stack to include in my architecture when developing these web apps? I'm asking your inputs with regards to the UI, database and reporting stack/toolset. Currently I have these in mind: UI = jQuery, jQueryUI (add your comments for other good UI stack) database = will be considering NoSQL or simply but RDBMS reporting tool = i'm clueless here Will it also make sense to use NoSQL database on these CRUD applications? I am assuming that the data would balloon later on. The desktop/native app route is an option only if there is a requirement, that in my limited experience, believes that a web app can't solve. Like for example those imaging apps/document forms and point-of-sale systems. I believe that web apps are gaining ground now and I find it most fun and intriguing to play and experiment with them. Please share your suggestions!

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• Is it reasonable to expect knowing the whole stack bottom up?

  - by Vaibhav Garg

  I am an Sr. developer/architect/Product Manager for embedded systems. The systems that I have had experience with have typically been small to medium size codebases - typically close to 25-30K LOC in C, using 8-16 and 32 bit low end microcontrollers. The systems have been entirely bootstrapped by our team - meaning right from the start-up code to the end application code has either been written by the team, or at the very least, is thoroughly understood and maintained by us. Now, if we were to start developing more complex systems with complex peripherals, such as USB OTG et al. (think, low end cell phones), there are libraries and stacks available commercially and from chip vendors that reduce the task to just calling the right APIs and being able to use those peripherals. Now, from a habit point of view, this does not give me and the team a comfortable feeling, not being able to comprehend the entire code tree, with virtual black boxes at the lower layers. Is it reasonable to devote, and reserve, time getting into the details of how the APIs are implemented, assuming that the same would also entail getting into details of relevant standards (again, for USB as an example)? Or, alternatively, should a thorough understanding of the top level usage of the APIs be sufficient? This of course assumes that the source codes to all libraries are available, which they are, in almost all cases. Edit: In partial response to @Abhi Beckert, the documentation is refreshingly very comprehensive and meticulously maintained, AFAIK and been able to judge. I have not had a long experience with the same.

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• Is eval the defmacro of javascript?

  - by Florian Margaine

  In Common Lisp, defmacro basically allows us to build our own DSL. I read this page today and it explains something cleverly done: But I wasn't about to write out all these boring predicates myself, so I defined a function that, given a list of words, builds up the text for such a predicate automatically, and then evals it to produce a function. Which just looks like defmacro to me. Is eval the defmacro of javascript? Could it be used as such?

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• j2ee implementing security and using a framwork pros and cons

  - by Ismail Marmoush

  I'm a newbie to j2ee security, and i'm not j2ee expert either, though i'm really willing to put some effort and learn I've an application that i'm about to develop on Google App Engine (GAE) --with no time constraints. As you know GAE handles a lot of web container security issues for you, also I will be using openID for authentication exclusively (sessions will be handled by provider). GAE supports SSL which will help with confidentiality and integrity maybe. Authorization can be done through filters. I know reinventing the wheel is a mess, but I was looking forward to learn something about security and implement that in my new app. so what the pros and cons of using a framework like shiro, spring security, jguard etc or filling the rest of gaps on my own ?

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• scrapy cannot find div on this website [on hold]

  - by Jaspal Singh Rathour

  I am very new at this and have been trying to get my head around my first selector can somebody help? i am trying to extract data from page http://groceries.asda.com/asda-webstore/landing/home.shtml?cmpid=ahc--ghs-d1--asdacom-dsk-_-hp#/shelf/1215337195041/1/so_false all the info under div class = listing clearfix shelfListing but i cant seem to figure out how to format response.xpath(). I have managed to launch scrapy console but no matter what I type in response.xpath() i cant seem to select the right node. I know it works because when I type response.xpath('//div[@class="container"]') I get a response but don't know how to navigate to the listsing cleardix shelflisting. I am hoping that once i get this bit I can continue working my way through the spider. Thank you in advance! PS I wonder if it is not possible to scan this site - is it possible for the owners to block spiders?

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• Best Books of C

  - by Patrick

  Hi, I realy want to get high skills in C programming and I know that the best and only way is hard work and lots of practice. though I found so many tutorials and books available on the net about learning the C language. I'm just looking for one or two good books in C that I can learn from and get high skills in C. Anyone knows such a great book/books for C programming pls? (sorry for replication if the question exists already in the forum) Regards!

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• Best practice to query data from MS SQL Server in C Sharp?

  - by Bruno

  What is the best way to query data from a MS SQL Server in C Sharp? I know that it is not good practice to have an SQL query in the code. Is the best way to create a stored procedure and call it from C Sharp with parameters? using (var conn = new SqlConnection(connStr)) using (var command = new SqlCommand("StoredProc", conn) { CommandType = CommandType.StoredProcedure }) { conn.Open(); command.ExecuteNonQuery(); conn.Close(); }

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• Programming Test

  - by Travis Webb

  We are looking to hire some more Java developers onto our team, and plan to test their coding abilities with a test. We currently use a web-based Java test that automatically compiles and runs the code, but it is very flaky and we're having problems with our candidates losing their work on this site. Not only is this frustrating for everyone, it makes us look like we don't know what we're doing. Is there a popular testing suite out there? What do you use? I'm not interested in dogmatic arguments on whether or not I should be testing my candidates in this way, I'm looking for a tool that will help me do it.

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• What real life bad habits has programming given you?

  - by Jacob T. Nielsen

  Programming has given me a lot of bad habits and it continues to give me more everyday. But I have also gotten some bad habits from the mindset that I have put myself in. There simply are some things that are deeply rooted in my nature, though some of them I wish I could get rid of. A few: Looking for polymorphism, inheritance and patterns in all of God's creations. Explaining the size of something in pixels and colors in hex code. Using code related abstract terms in everyday conversations. How have you been damaged?

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• How to name an subclass that add a minor, detailed thing?

  - by Louis Rhys

  What is the most concise (yet descriptive) way of naming a subclass that only add a specific minor thing to the parent? I encountered this case a lot in WPF, where sometime I have to add a small functionality to an out-of-the-box control for specific cases. Example: TreeView doesn't change the SelectedItem on right-click, but I have to make one that does in my application. Some possible names are TreeViewThatChangesSelectedItemOnRightClick (way too wordy and maybe difficult to read because there is so many words concantenated together) TreeView_SelectedItemChangesOnRightClick (slightly more readable, but still too wordy and the underscore also breaks the normal convention for class names) TreeViewThatChangesSIOnRC (non-obvious acronym), ExtendedTreeView (more concise, but doesn't describe what it is doing. Besides, I already found a class called this in the library, that I don't want to use/modify in my application). LouisTreeView, MyTreeView, etc. (doesn't describe what it is doing). It seems that I can't find a name which sounds right. What do you do in situation like this?

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• Advice on SCRUM for the solitary developer [closed]

  - by ProfK

  Possible Duplicate: Agile for the Solo Developer I am looking for advice on the SCRUM process for a solitary developer. Most SCRUM resources I see focus on its use in a team environment, hence my question here. I'd like some guidance on structuring and managing my projects for SCRUM, with me as a solitary developer and business owner, but still occasionally including my clients for input and feedback. Areas I'm not clear on include resolving my backlog into 'sprintable' project areas and stories, defining user stories properly with a view to being digested by developer level users, defining feasible sprints for a single developer etc. Essentially I'm looking for advice on moving from using scrum in a team/office environment, with colleagues and project manager, and using chaos/cowboy-coding on my own, to assuming the role of PM myself and adopting scrum for work on my own. Any advice is welcome.

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• Benefit of using Data URI to embed images within HTML document and its cross-browser compatibility

  - by Manoj Agarwal

  I want to embed an image using Data URI within HTML document so that we don't need image as a separate attachment, we get just one HTML file that contains the actual image. What are its advantages and disadvantages? Does IE10 supports it? Is it useful to have such an implementation? I am working on an application, where we have html documents that link towards images stored in some location. If I use tiny online editor, as images are saved somewhere in the server, while editing the document, i can provide a link towards that image, but can't preview the final document with images from within tiny editor. If I chose to download the file locally, then i will need to download the images from server side. It looks a bit overkill, so I thought if Data URI could be used in such a situation.

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• Turbo C++ to Visual Studio 2010 migration [closed]

  - by BigGenius

  OK, based on my previous questions and your help., I have gone to install Visual Studio Express. But now problem is, the programs which I successfully code at home on Visual Studio don't run on Turbo C++ compiler at school (assuming I type the program instead of exporting code). Is there anything I can do? Also I am just learning basic syntax and data handling, loops, structures, arrays and all. But Visual Studio has auto completion and pretty typing (which may be advantageous) but crap for a beginner getting hold on to language. Sorry, if I have been unclear. But what should I do? This will make me lazy programmer and will reflect in my grades. Is there any other IDE, which I can use, very similar to Turbo C++ and able to run in Windows 7 in fullsreen mode.

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• Partnering with a web designer to build and launch websites for fun. Where should I look for someone? [closed]

  - by FastCoder

  I have been working with web sites and web development for a long time and as a result I am able to build and launch complex websites (social network, dating site, stackoverflow, etc.) in little time (1-3 weeks). Problem is: I know very little about CSS, page layout, photoshop and graphic design. Of course I know HTML but when it comes to putting together something that looks good I am horrible. I just don't have the artistic skills. I wanted to launch some websites without any silly or naive intent to take over the world. Just for fun and to improve the portfolio. How do you guys recommend that I approach this problem of "finding this right partner" with the same mindset? Where should I look for this person? I have no idea... :(

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• What are the best resources for learning about concurrency and multi-threaded applications?

  - by Zepee

  I realised I have a massive knowledge gap when it comes to multi-threaded applications and concurrent programming. I've covered some basics in the past, but most of it seems to be gone from my mind, and it is definitely a field that I want, and need, to be more knowledgeable about. What are the best resources for learning about building concurrent applications? I'm a very practical oriented person, so if said book contains concrete examples the better, but I'm open to suggestions. I personally prefer to work in pseudocode or C++, and a slant toward game development would be best, but not required.

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• Ms Build publishing vs Visual Studio IDE publishing

  - by reggie

  I am currently working on ms build to publish my winform application based on the environment selected (Dev or Prod). I am using Ms Build Community Task and referencing this article to achieve this purpose. I had a few theoretical doubts based on publishing application. 1) Is there any difference in publishing through the visual studio ide and msbuild? 2) What do most developers prefer to use and why? 3) What are the advantages of using MsBuild to publish an application as compared to publishing through the visual studio IDE? 4) What is faster? I am using a .net 3.5 winform application developed in Csharp and my question is pertaining to clickonce windows applications only. Please help me clear these doubts

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• What are must have tools for web development?

  - by Amir Rezaei

  Which are must have tools for web development under windows? It can include tools such as design, coding etc. Update: Please post only one and the best tool in your opinion for each type of tools. For instance post only the name of the best design tool and not a list of them. Update: By tools I don't necessary mean small softwares. I didn't find this question, hope no one has already asked it.

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• Best approach for a flexible layout for ASP.NET application

  - by Rohith Nair

  I am looking for a best approach for designing a dynamic page. I want my users to be able to determine the position of set of controls to be loaded into a page. Should be able to add new controls or swap in and out new controls into an existing page. Eg: Portal based applications,iGoogle kind of websites I am afraid that I will be re-inventing the wheel if I go and create a portal structure for my web application. There are a couple of things in my mind to look into: Good third-party suites which can do the same Should I look into Silverlight RIA application? I have researched about the Infragistics and Telerik controls and the price is high for just a control like LayoutManager which I need. Any alternatives? What is the best approach for this kind of situation, to add to the list?

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