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• Organizing ASP.Net Single Page Application with Nancy

  - by OnesimusUnbound

  As a personal project, I'm creating a single page, asp.net web application using Nancy to provide RESTful services to the single page. Due to the complexity of the single page, particularly the JavaScripts used, I've think creating a dedicated project for the client side of web development and another for service side will organize and simplify the development. solution | +-- web / client side (single html page, js, css) | - contains asp.net project, and nancy library | to host the modules in application project folder | +-- application / service (nancy modules, bootstrap for other layer) | . . . and other layers (three tier, domain driven, etc) . Is this a good way of organizing a complex single page application? Am I over-engineering the web app, incurring too much complexity?

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• Editing service for blogger with terrible English grammar

  - by Josh Moore

  I would like to write a technical blog. However, the biggest things holding me back is my poor spelling, punctuation, and grammar (I have all these problems even though I am a native English speaker). I am thinking about using a professional editing/proofreading service to fix my blog posts before I post them. However, given the content will be technical in nature (some articles will get into details of programming) and I would like to write them in markdown, I am not sure if the general online services will be a good fit. Can you recommend a editor (or company) that you like that can provide this service?

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• Card deck and sparse matrix interview questions

  - by MrDatabase

  I just had a technical phone screen w/ a start-up. Here's the technical questions I was asked ... and my answers. What do think of these answers? Feel free to post better answers :-) Question 1: how would you represent a standard 52 card deck in (basically any language)? How would you shuffle the deck? Answer: use an array containing a "Card" struct or class. Each instance of card has some unique identifier... either it's position in the array or a unique integer member variable in the range [0, 51]. Shuffle the cards by traversing the array once from index zero to index 51. Randomly swap ith card with "another card" (I didn't remember how this shuffle algorithm works exactly). Watch out for using the same probability for each card... that's a gotcha in this algorithm. I mentioned the algorithm is from Programming Pearls. Question 2: how to represent a large sparse matrix? the matrix can be very large... like 1000x1000... but only a relatively small number (~20) of the entries are non-zero. Answer: condense the array into a list of the non-zero entries. for a given entry (i,j) in the array... "map" (i,j) to a single integer k... then use k as a key into a dictionary or hashtable. For the 1000x1000 sparse array map (i,j) to k using something like f(i, j) = i + j * 1001. 1001 is just one plus the maximum of all i and j. I didn't recall exactly how this mapping worked... but the interviewer got the idea (I think). Are these good answers? I'm wondering because after I finished the second question the interviewer said the dreaded "well that's all the questions I have for now." Cheers!

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• How do I write a good talk proposal for a FOSS programming conference?

  - by Andrew Grimm

  I'm hoping to give a talk at RubyKaigi this year, and I'd like to know what makes a good talk proposal. RubyKaigi is a conference run by Ruby enthusiasts (as opposed to it being a trade conference, or an academic conference). The proposal form can be seen here. So far, my draft proposal about a program I'm working on mentions: What the program is useful for and why it is relevant. How it works. What topics it touches upon (such as metaprogramming and testing) Is there anything that I should mention in my proposal? Also, how thorough should I be in my "Details of your talk" section? Should I be exhaustive, or only have a couple of short paragraphs?

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• Learning to program in C (coming from Python)

  - by Honza Pokorny

  If this is the wrong place to ask this question, please let me know. I'm a Python programmer by occupation. I would love to learn C. Indeed, I have tried many times, but I always get discouraged. In Python, you write a few lines and the program does wonders. In C, I can't seem to be able to do anything useful. It seems to be very complicated to even connect to the Internet. Do you have any suggestions on what I can do to learn C? Are there are any good websites? Any cool projects? Thanks

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• Standards for how developers work on their own workstations

  - by Jon Hopkins

  We've just come across one of those situations which occasionally comes up when a developer goes off sick for a few days mid-project. There were a few questions about whether he'd committed the latest version of his code or whether there was something more recent on his local machine we should be looking at, and we had a delivery to a customer pending so we couldn't wait for him to return. One of the other developers logged on as him to see and found a mess of workspaces, many seemingly of the same projects, with timestamps that made it unclear which one was "current" (he was prototyping some bits on versions of the project other than his "core" one). Obviously this is a pain in the neck, however the alternative (which would seem to be strict standards for how each developer works on their own machine to ensure that any other developer can pick things up with a minimum of effort) is likely to break many developers personal work flows and lead to inefficiency on an individual level. I'm not talking about standards for checked-in code, or even general development standards, I'm talking about how a developer works locally, a domain generally considered (in my experience) to be almost entirely under the developers own control. So how do you handle situations like this? Are the one of those things that just happens and you have to deal with, the price you pay for developers being allowed to work in the way that best suits them? Or do you ask developers to adhere to standards in this area - use of specific directories, naming standards, notes on a wiki or whatever? And if so what do your standards cover, how strict are they, how do you police them and so on? Or is there another solution I'm missing? [Assume for the sake of argument that the developer can not be contacted to talk through what he was doing here - even if he could knowing and describing which workspace is which from memory isn't going to be simple and flawless and sometimes people genuinely can't be contacted and I'd like a solution which covers all eventualities.]

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• What source code organization approach helps improve modularity and API/Implementation separation?

  - by Berin Loritsch

  Few languages are as restrictive as Java with file naming standards and project structure. In that language, the file name must match the public class declared in the file, and the file must live in a directory structure matching the class package. I have mixed feelings about that approach. While I never have to guess where a file lives, there's still a lot of empty directories and artificial constraints. There's several languages that define everything about a class in one file, at least by convention. C#, Python (I think), Ruby, Erlang, etc. The commonality in most these languages is that they are object oriented, although that statement can probably be rebuffed (there is one non-OO language in the list already). Finally, there's quite a few languages mostly in the C family that have a separate header and implementation file. For C I think this makes sense, because it is one of the few ways to separate the API interface from implementations. With C it seems that feature is used to promote modularity. Yet, with C++ the way header and implementation files are split seems rather forced. You don't get the same clean API separation that you do with C, and you are forced to include some private details in the header you would rather keep only in the implementation. There's quite a few languages that have a concept that overlaps with interfaces like Java, C#, Go, etc. Some languages use what feels like a hack to provide the same concept like C# using pure virtual abstract classes. Still others don't really have an interface concept and rely on "duck" typing--for example Ruby. Ruby has modules, but those are more along the lines of mixing in behaviors to a class than they are for defining how to interact with a class. In OO terms, interfaces are a powerful way to provide separation between an API client and an API implementation. So to hurry up and ask the question, from a personal experience point of view: Does separation of header and implementation help you write more modular code, or does it get in the way? (it helps to specify the language you are referring to) Does the strict file name to class name scheme of Java help maintainability, or is it unnecessary structure for structure's sake? What would you propose to promote good API/Implementation separation and project maintenance, how would you prefer to do it?

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• Design of input files reading when it comes to defaults/transformations

  - by Stefano Borini

  Suppose you have an application that reads an input file, on a language that does not support the concept of None. The input is read, parsed, and the contents are stored on a structure for later use. Now, in general you want to keep into account transformation of the data from the input, such as adding default values when not specified, or adding full path information to relative path specified in the input. There are two different strategies to achieve this. The first strategy is to perform these transformations at input file reading time. In practice, you put all the intelligence into the input parser, and your application has no logic to deal with unexpected circumstances, such as an unspecified value. You lose the information of what was specified and what wasn't, but you gain in black-boxing the details. Your "running code" needs that information in any case and in a proper form, and is not concerned if it's the default or a user-specified information. The second strategy is to have the file reader a real one-to-one mapper from the file to a memory-stored object, with no intelligent behavior. unspecified values are not filled (which may however be a problem in languages not supporting None) and data is stored verbatim from the file. The intelligence for recovery must now go into the "running code", which must check what was specified in the file, eventually fall back to a default, or modify the input properly before using it. I would like to know your opinion on these two approaches, and in particular which one you found the most frequently implemented.

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• how to improve design ability

  - by Cong Hui

  I recently went on a couple of interviews and all of them asked a one or two design questions, like how you would design a chess, monopoly, and so on. I didn't do good on those since I am a college student and lack of the experience of implementing big and complex systems. I figure the only way to improve my design capability is to read lots of others' code and try to implement myself. Therefore, for those companies that ask these questions, what are their real goals in this? I figure most of college grads start off working in a team guided by a senior leader in their first jobs. They might not have lots of design experience fresh out of colleges. Anyone could give pointers about how to practice those skills? Thank you very much

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• Complex Release Vehicle Management

  - by Sharon

  I'm looking into improving our build and release system. We are a .Net/Windows shop, and I don't see any really good tools for Windows for generating the files that are to be dropped in patch or hotfix. We are currently using TFSBuild 2010 with Windows Workflows for our continuous integration builds as well as our daily full build which includes an Installshield package for deployment. What is a good way of generating the list of files to be included in a "patch" style release, where one does not redistribute all the files, but only those necessary to accomplish the necessary changes? Are there any open source tools that work well for this, or do teams usually roll their own? I have considered using Beyond Compare but I would prefer something open source. The file "patch" creation must be 100% automatable. Which release vehicles really ought to be patch style? And which releases should replace all system files related to our application? Assume we have a very large amount of resources necessary to maintain. Is there any established material that is trusted within the industry for strategies about this? I realize it is different for "enterprise" rather than with typical websites. I am looking more for "enterprise" strategies due to our product distribution style. tl;dr Looking for info on how to ship more reliable packages?

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• What kinds of demos are good to make for a software engineer job

  - by user23012

  I have created my cv site and sent out my demos for a while now, but most of my demos are either from my course or games related since my course was a games programming course, I was wondering what kind of demos are good to show off my skills in programming in general. These are what i already have Pennies:just a simple game first coursework i did. Compiler:coursework for compiler writing module Pongout: basic a pong game in 68k using colour detection Snake: snake in 68k same thing as the pong Game Cube Maze: gamecube work BeatmyBot: basic Ai Basic plat-former game: 2d game with different types of collision Turing Lambda Simulation: my dissertation Turing machine simulated in Miranda. alpha and Beta reduction,and SKI calculus simulated in the Turing machine. What I am asking here is what kind of demos are good to add or have, i have been looking and have hit a tough spot I cant think of anything to make more than games. so for a general graduate software engineer what types would be good examples? EDIT: since responding to the comments bellow well for what languages well my main one would be C++, followed by Java, Erlang and abit of Haskell

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• Dual Inspection / Four Eyes Principle

  - by Ralf

  I have the requirement to implement some kind of dual inspection or four-eyes principle as a feature of my software, meaning that every change of an object done by user A has to be checked by user B. A trivial example would be a publishing system where an author writes an article and another has to proofread it before it is published. I am a little bit surprised that you find nearly nothing about it on the net. No patterns, no libraries (besides cibet), no workflow solutions etc. Is this requirement really so uncommon? Or am I searching for the wrong terms? I am not looking for a specific solution. More for a pattern or best practice approach. Update: the above example is really trivial. Let's add some more complexity to it. The article has been published, but it now needs an update. Putting the article offline for the update is not an option, but the update has to be proof read, too.

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• How do "custom software companies" deal with technical debt?

  - by andy

  What are "custom software companies"? By "custom software companies" I mean companies that make their money primarily from building custom, one off, bits of software. Example are agencies or middle-ware companies, or contractors/consultants like Redify. What's the opposite of "custom software companies"? The oposite of the above business model are companies that focus on long term products, whether they be deployable desktop/mobile apps, or SaaS software. A sure fire way to build up technical debt: I work for a company that attempts to focus on a suite of SaaS products. However, due to certain constraints we sometimes end up bending to the will of certain clients and we end building bits of custom software that can only be used for that client. This is a sure fire way to incur technical debt. Now we have a bit of software to maintain that adds nothing to our core product. If custom work is a sure fire way to build technical debt, how do agencies handle it? So that got me thinking. Companies who don't have a core product as the center of their business model, well they're always doing custom software work. How do they cope with the notion of technical debt? How does it not drive them into technical bankruptcy?

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• How do you manage the testing of your Android software on physical devices?

  - by Philip Regan

  I'm in charge of managing mobile application development at my company, and I am currently building a mobile device "library" for testing. Essentially, we want to have a representative device in-house for each of the OSes we are developing for, currently iOS (iPhone-only), Blackberry, and Android. Simulators only go so far, but I'm placing into the process a step to test software on the devices themselves. The problem we're finding is with Android. I don't think any of us here ever really understood just how fragmented the whole platform is until we started looking at devices to acquire. We are going to wait until v2.3 of Android is released, but which products to choose? Do we go by the most popular by market share? Do we get a small range of products by specs from least to most powerful overall? We're trying to avoid having to manage a dozen different devices to test each app, if not because of cost if only for the repeated time sink. How do you manage the testing of your Android software on physical devices?

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• Why is an anemic domain model considered bad in C#/OOP, but very important in F#/FP?

  - by Danny Tuppeny

  In a blog post on F# for fun and profit, it says: In a functional design, it is very important to separate behavior from data. The data types are simple and "dumb". And then separately, you have a number of functions that act on those data types. This is the exact opposite of an object-oriented design, where behavior and data are meant to be combined. After all, that's exactly what a class is. In a truly object-oriented design in fact, you should have nothing but behavior -- the data is private and can only be accessed via methods. In fact, in OOD, not having enough behavior around a data type is considered a Bad Thing, and even has a name: the "anemic domain model". Given that in C# we seem to keep borrowing from F#, and trying to write more functional-style code; how come we're not borrowing the idea of separating data/behavior, and even consider it bad? Is it simply that the definition doesn't with with OOP, or is there a concrete reason that it's bad in C# that for some reason doesn't apply in F# (and in fact, is reversed)? (Note: I'm specifically interested in the differences in C#/F# that could change the opinion of what is good/bad, rather than individuals that may disagree with either opinion in the blog post).

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• Are there opportunities working as full-time paid programmer for Non-profit organizations

  - by Rick

  Some recent events in my life have made me want to contribute more to causes I believe in rather than just working for a profit-driven company. I have been thinking that if I could find a non-profit organization that I like and believe in then I might feel more fulfilled working for them. I have a decent amount of web development experience and currently work as a Java / Spring web developer. I realize the compensation wouldn't have the same "ceiling" potential as for-profit but am wondering if its possible to get at least something close to a market rate for work as I am planning to start a family sometime soon and still need a legitimate income. If anyone has any knowledge or experience about this sort of thing would be happy to hear from you. EDIT: Without getting in to too much personal detail, I have a relative who recently passed away who suffered from a mental illness so while it doesn't have to be an organization specifically dedicated to this, I am hoping to work for something along these lines at least where there is more of a social cause rather than just working on an open-source project whose only cause is the advancement of technology.

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• Two internships at the same time -- good or bad?

  - by Karl

  I had no internship a few months ago, so I basically went on a 'resume mailing' spree and emailed a lot of companies that I was interested in working for and that had my line of work. This didn't prove futile until a company accepted me into their internship program but said that I would be working remotely. I had no problem with that, the project was good and I was interested. Now I have another internship at a company that is close to my home and I don't want to miss it at all! I can manage both internships side-by-side. In the day, I will do the internship that is closer to my home and at night (and other times), I can manage the remote internship. My question is -- should I both? I am particularly interested in how two internships at the same time are viewed. Would it look good or bad? PS: Neither is paying me anything, so money is not a factor.

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• Webpage redirection time

  - by Abhijeet Ashok Muneshwar

  I want to calculate time consumed in redirecting from 1 webpage to another webpage. For Example: 1) I am using Facebook in Google Chrome browser. I have shared 1 link on my Facebook profile like below: http://www.webdeveloper.com/ (It's not only Facebook. It can be any domain having link to another domain). 2) When I click on this link from my Facebook profile, then this website will open in new tab. 3) I want to calculate time difference in miliseconds or microseconds between below two events: First Event: Time of clicking link "http://www.webdeveloper.com/" from my Facebook profile. Second Event: Time of completely loading webpage of "http://www.webdeveloper.com/". Thank you in advance.

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• Choosing between PHP and Java

  - by user996459

  I've recently started University, studying Computing and IT. My Uni focuses on Java. My study will consist of mathematics, 'boring' IT related stuff and several Java units such as: -Software development with Java, -Object-oriented Java programming, -Relational databases: theory and practice (using Java), -Developing concurrent distributed systems (using Java), -Software engineering with objects (using Java). I'm trying to determine whenever I should focus on Java and self study it in my free time so that I can actually learn and become a competent Java programmer by the time I graduate, or, only do enough Java to get the degree but in my free time self study PHP and related web technologies. Job market in my area appears to be balanced for the two, salary and availability wise. Regardless of which patch I'd take getting a job should not be a problem however Java does seem to pay almost insignificantly more. In terms of my interest and career expectations, I don't have anything specific planned. I very much enjoy writing code but I don't really care what kind. So far I equally enjoyed writing C, AutoIT, vb.net, PHP and even Java. Basically, I'm happy as long as I get to type in code (be it low level programming or web back-end scripting). So the question really is, would my Uni and their Java focus profit me should I choose PHP? Or should I buy what my university is selling and stick to Java like a fly sticks to poop...? Apologies for cryptic writing, still learning English

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• Code maintenance: keeping a bad pattern when extending new code for being consistent or not ?

  - by Guillaume

  I have to extend an existing module of a project. I don't like the way it has been done (lots of anti-pattern involved, like copy/pasted code). I don't want to perform a complete refactor. Should I: create new methods using existing convention, even if I feel it wrong, to avoid confusion for the next maintainer and being consistent with the code base? or try to use what I feel better even if it is introducing another pattern in the code ? Precison edited after first answers: The existing code is not a mess. It is easy to follow and understand. BUT it is introducing lots of boilerplate code that can be avoided with good design (resulting code might become harder to follow then). In my current case it's a good old JDBC (spring template inboard) DAO module, but I have already encounter this dilemma and I'm seeking for other dev feedback. I don't want to refactor because I don't have time. And even with time it will be hard to justify that a whole perfectly working module needs refactoring. Refactoring cost will be heavier than its benefits. Remember: code is not messy or over-complex. I can not extract few methods there and introduce an abstract class here. It is more a flaw in the design (result of extreme 'Keep It Stupid Simple' I think) So the question can also be asked like that: You, as developer, do you prefer to maintain easy stupid boring code OR to have some helpers that will do the stupid boring code at your place ? Downside of the last possibility being that you'll have to learn some stuff and maybe you will have to maintain the easy stupid boring code too until a full refactoring is done)

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• How do I go about hosting facebook apps that are picking speed?

  - by Karthik

  My situation is this. I coded in php and built a facebook app. After 3 days it has 13,000 users. I have my own server at hostmonster. It is a regular plan costing me about $70 per year. It has unlimited bandwidth. I did not anticipate hosting apps or that it could pick up so many users. Already 1 Gb of data was transferred in the last few days. I am planning to build a few more apps(around 10 - 20) and reach atleast a million users in total. Should I continue hosting on the same server or move to a VPS? I am a student and I don't have too much of a disposable income. So I want to move only if it is necessary. Right now it shows 1 Gb/infinity in data transfer. Any help/suggestions highly appreciated.

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• Improving without mentor

  - by speeder

  Although I consider myself not much experienced, I keep landing in jobs as the leader somehow (in the current one I am tech director of the company, in a previous one I was the R&D head). I understand why this happen (I have a certain specific set of skills, and I use some uncommon programming languages), my issue is: I cannot find a mentor... I know there must be stuff to me learn, and I notice as I work over the years that I am slowly learning more and more, but I believe that there are some way to get better much faster than just coding... So, how I improve when there are no other person in the company to teach me, or to me read their code? (or fix their code even...) I think I am beyond books, but way below a "master" level, so I don't know where to learn more.

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• Good Laptop .NET Developer VM Setup

  - by Steve Brouillard

  I was torn between putting this question on this site or SuperUsers. I've tried to do a good bit of searching on this, and while I find plenty of info on why to go with a VM or not, there isn't much practical advise on HOW to best set things up. Here's what I currently HAVE: HP EliteBook 1540, quad-core, 8GB memory, 500GB 7200 RPM HD, eSATA port. Descent machine. Should work just fine. Windows 7 64-bit Host OS. This also acts as my day-to-day basic stuff (email, Word Docs, etc...) OS. VMWare Desktop Windows 7 64-bit Guest OS with all my .NET dev tools, frameworks, etc loaded on it. It's configured to use 2 cores and up to 6GB of memory. I figure that the dev env will need more than email, word, etc... So, this seemed like a good option to me, but I find with the VM running, things tend to slow down all around on both the host and guest OS. Memory and CPU utilization don't seem to be an issue, but I/O does. I tried running the VM on an external eSATA drive, figuring that the extra channel might pick up the slack. Things only got worse (could be my eSATA enclosure). So, for all of that I have basically two questions in one. Has anyone used this sort of setup and are there any gotchas either around the VMWare configuration or anything else I may have missed here that you can point me to? Is there another option that might work better? For example, I've considered trying a lighter weight Host OS and run both of my environments as VMs? I tried this with Server 2008 Hyper-V, but I lose too much laptop functionality going this route, so I never completed setup. I'm not averse to Linux as a host OS, though I'm no Linux expert. If I'm missing any critical info, feel free to ask. Thanks in advance for your help. Steve

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• Taking Object Oriented development to the next level

  - by Songo

  Can you mention some advanced OO topics or concepts that one should be aware of? I have been a developer for 2 years now and currently aiming for a certain company that requires a web developer with a minimum experience of 3 years. I imagine the interview will have the basic object oriented topics like (Abstraction, Polymorphism, Inheritance, Design patterns, UML, Databases and ORMs, SOLID principles, DRY principle, ...etc) I have these topics covered, but what I'm looking forward to is bringing up topics such as Efferent Coupling, Afferent Coupling, Instability, The law of Demeter, ...etc. Till few days ago I never knew such concepts existed (maybe because I'm a communication engineer basically not a CS graduate.) Can you please recommend some more advanced topics concerning object oriented programming?

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• Getting work done in a small office

  - by three-cups

  I work in an office area of ~450sqft. There are a total of 7 people working in the office. I've been finding it hard to concentrate on my work (writing code) because of the distractions going on around me. The distractions are both work-related and non-work-related conversations. I'm trying to figure out what to do in this situation. I want to be part of the team, and I want to get my work done to the best of my ability. I can easily think of two options that I don't like: Stay where I am, not be able to concentrate and get less work done Move somewhere else. (This is tough because I code on a desktop, so I'm not very mobile.) But what are other options? I'm going to talk this through with my team in the next couple days. Any advice or solutions would be great.

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