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• How and why are operating systems bootable from a USB?

  - by user114638

  I'm told to install ubuntu on my laptop for work in order to learn shell scripting. I've read the best way is to install ubuntu on a USB stick and partition my HDD. I'm curious how an OS is bootable from a USB stick? Is it literally just a small interface that can be put anywhere? This reminds me of a time I downloaded a game onto my USB stick, when I brought it to my friends house he told me it will run slow if I don't install it and only run it from the usb, is this different from running ubuntu from a usb? Will ubuntu be slow?

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• Using Qt to open external game appplication

  - by RandomGuy

  I have a windows qt application and I'm trying to open an external game, but I'm not having success. Application is in C:\games\Oni\Edition\ and is called Oni.exe, the code I'm using right now is the follow: void MainWindow::on_toolButton_clicked() { qint64 test=1; if(!QProcess::startDetached("Oni.exe",QStringList(),"C:\\games\\Oni\\Edition\\",&test)){ QMessageBox msgBox; msgBox.setText("Oni couln't be started!"); msgBox.exec(); } } I don't know if I'm forgetting something? The game runs fine if I double click it. Thanks.

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• How can you get constructive criticism for your code?

  - by burnt1ce

  My team rarely does code review, mainly because we don't have enough time and people lack the energy and will to do so. But I would really like to know what people think about my code when they read it. This way, I have a better understanding how other people think and tailor my code accordingly so it's easier to read. So my question is, how can I get constructive criticism for my code? My intent is to understand how people think so I can write more readable code.

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• Meaningful concise method naming guidelines

  - by Sam

  Recently I started releasing an open source project, while I was the only user of the library I did not care about the names, but know I want to assign clever names to each methods to make it easier to learn, but I also need to use concise names so they are easy to write as well. I was thinking about some guidelines about the naming, I am aware of lots of guidelines that only care about letters casing or some simple notes. Here, I am looking after guidelines for meaningful concise naming. For example, this could be part of the guidelines I am looking after: Use Add when an existing item is going to be added to a target, Use Create when a new item is being created and added to a target. Use Remove when an existing item is going to be removed from a target, Use delete when an item is going to be removed permanently. Pair AddXXX methods with RemoveXXX and Pair CreateXXX methods with DeleteXXX methods, but do not mix them. The above guidance may be intuitive for native English speakers, but for me that English is my second language I need to be told about things like this.

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• Armchair Linguists: 'code' vs. 'codes'--or why I write 'code' and my manager asks for 'codes'

  - by Ukko

  I wanted to tap into the collective wisdom here to see if I can get some insight into one of my pet peeves, people who thread "code" as a countable noun. Let me also preface this by saying that I am not talking about anyone who speaks english as a second language, this is a native phenomenon. For those of us who slept through grammar class there are two classes of nouns which basically refer to things that are countable and non-countable (sometimes referred to as count and noncount). For instance 'sand' is a non-count noun and 'apple' is count. You can talk about "two apples" but "two sands" does not parse. The bright students then would point out a word like "beer" where is looks like this is violated. Beer as a substance is certainly a non-count noun, but I can ask for "two beers" without offending the grammar police. The reason is that there are actually two words tied up in that one utterance, Definition #1 is a yummy golden substance and Definition #2 is a colloquial term for a container of said substance. #1 is non-count and #2 is countable. This gets to my problem with "codes" as a countable noun. In my mind the code that we programmers write is non-count, "I wrote some code today." When used in the plural like "Have you got the codes" I can only assume that you are asking if I have the cryptographically significant numbers for launching a missile or the like. Every time my peer in marketing asks about when we will have the new codes ready I have a vision of rooms of code breakers going over the latest Enigma coded message. I corrected the usage in all the documents I am asked to review, but then I noticed that our customer was also using the work "codes" when they meant "code". At this point I have realized that there is a significant sub-population that uses "codes" and they seem to be impervious to what I see as the dominant "correct" usage. This is the part I want some help on, has anyone else noticed this phenomenon? Do you know what group it is associated with, old Fortran programmer perhaps? Is it a regionalism? I have become quick to change my terms when I notice a customer's usage, but it would be nice to know if I am sending a proposal somewhere what style they expect. I would hate to get canned with a review of "Ha, these guy's must be morons they don't even know 'code' is plural!"

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• Best method to organize/manage dependencies in the VCS within a large solution

  - by SnOrfus

  A simple scenario: 2 projects are in version control The application The test(s) A significant number of checkins are made to the application daily. CI builds and runs all of the automation nightly. In order to write and/or run tests you need to have built the application (to reference/load instrumented assemblies). Now, consider the application to be massive, such that building it is prohibitive in time (an entire day to compile). The obvious side effect here, is that once you've performed a build locally, it is immediately inconsistent with latest. For instance: If I were to sync with latest, and open up one of the test projects, it would not locally build until I built the application. This is the same when syncing to another branch/build/tag. So, in order to even start working, I need to wait a day to build the application locally, so that the assemblies could be loaded - and then those assemblies wouldn't be latest. How do you organize the repository or (ideally) your development environment such that you can continually develop tests against whatever the current build is, or a given specific build, while minimizing building the application as much as possible?

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• Server Side Developer Prerequisites

  - by Jking

  I am new to server side development and am currently learning node.js. What sort of networking information should I be familiar with to allow for a smooth learning curve with server side development. Could anyone provide resources pertaining to the information required to get into server programming? To give you a better idea of my standpoint: I do not know how a server interacts with a database [Q: How does a NoSQL database, or database in general, communicate with a server?] I am unsure of how a web stack works [Q: I have heard of LAMP but do not know how Apache, MySQL, and PHP interact. Hopefully this applies to other stacks as well. How do the components of a stack work together? Also, is a MEAN stack an alternative, or is it completely irrelevant to this] I have trivial knowledge of internet protocol [however extremely inefficient][Q: What resources are beneficial when learning about networking, and how much/what knowledge should I acquire to program on the server side] I am unsure of what I am unsure of concerning networking information necessary to start development Information on how the client-server model works would be greatly appreciated

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• Software bug/defect classification

  - by Dustin K

  We're trying to come up with terms that better describe our bugs/defects. To us, the term 'bug' or 'defect' is too generic and doesn't accurately reflect what is happening. For example, instead of saying that there is a bug (in the general sense), we'd rather say what type of bug (an error, or enhancement, or improvement, etc.). What names do you use for describing 'bugs'? I found http://www.softwaredevelopment.ca/bugs.shtml which has some pretty good classifications. How do you classify them?

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• DAO/Webservice Consumption in Web Application

  - by Gavin

  I am currently working on converting a "legacy" web-based (Coldfusion) application from single data source (MSSQL database) to multi-tier OOP. In my current system there is a read/write database with all the usual stuff and additional "read-only" databases that are exported daily/hourly from an Enterprise Resource Planning (ERP) system by SSIS jobs with business product/item and manufacturing/SCM planning data. The reason I have the opportunity and need to convert to multi-tier OOP is a newer more modern ERP system is being implemented business wide that will be a complete replacement. This newer ERP system offers several interfaces for third party applications like mine, from direct SQL access to either a dotNet web-service or a SOAP-like web-service. I have found several suitable frameworks I would be happy to use (Coldspring, FW/1) but I am not sure what design patterns apply to my data access object/component and how to manage the connection/session tokens, with this background, my question has the following three parts: Firstly I have concerns with moving from the relative safety of a SSIS job that protects me from downtime and speed of the ERP system to directly connecting with one of the web services which I note seem significantly slower than I expected (simple/small requests often take up to a whole second). Are there any design patterns I can investigate/use to cache/protect my data tier? It is my understanding data access objects (the component that connects directly with the web services and convert them into the data types I can then work with in my Domain Objects) should be singletons (and will act as an Adapter/Facade), am I correct? As part of the data access object I have to setup a connection by username/password (I could set up multiple users and/or connect multiple times with this) which responds with a session token that needs to be provided on every subsequent request. Do I do this once and share it across the whole application, do I setup a new "connection" for every user of my application and keep the token in their session scope (might quickly hit licensing limits), do I set the "connection" up per page request, or is there a design pattern I am missing that can manage multiple "connections" where a requests/access uses the first free "connection"? It is worth noting if the ERP system dies I will need to reset/invalidate all the connections and start from scratch, and depending on which web-service I use might need manually close the "connection/session"

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• Diff annotation tool

  - by l0b0

  Among the 11 proven practices for more effective, efficient peer code review, diff annotation seems to be the one particularly well suited to tool assistance. The article is written by the architect of SmartBear's CodeCollaborator, so he of course recommends using that. Does anyone know of any alternatives? I can't think of anything that would be even close to paper+pen+marker in pure developer efficiency when it comes to explaining a piece of code.

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• How to publish paid Android apps if you're not from US/UK

  - by Sheikh Aman

  I was pretty excited while creating one of my apps but as it turns out you can't actually sign up for Google Checkout if you don't live either in the USA or in the UK. And since Google Checkout is the only way Android Market will pay you, all my efforts seem to be going in vain. So because I live in India, I can't sell my apps. I tried contacting Google by various means on this, but haven't got any response so far. I tried searching the web as well just to find out that one can't be paid via any other way. I am pretty sure that many people here might have gone through the same problem. How did you solve it? I have a PayPal account and an AdSense account as well. Can they help in any way? And if nothing works out, how am I supposed to be selling my app?

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• How to handle people who lie on their resume [closed]

  - by Juliet

  Moderator comment Please note that this is a two year old question that has just been migrated from Stack Overflow. Please take your time to read all the answers and ask yourself "would my answer add anything to this?". I'm conducting technical interviews to fill a few .NET positions. Many of the people I interview really do know .NET pretty well, but I find at least 90% embellish their skillset anywhere between "a little" to "quite drastically". Sometimes they fabricate skills relevant to the position they're applying for, sometimes they don't. Most of the people I interview, even the most egregious liars, are not scam artists. They just want to stand out among the crowd, so they drop a few buzzwords on their resume like "JBoss", "LINQ", "web services", "Django" or whatever just to pad their skillset and stay competitive. (You might wonder if a person that lies about those skills is just bluffing their way through a technical interview. My interviews involve a lot of hands-on coding and problem-solving – people who attempt to bluff will bomb the hands-on coding portion in the first 3 minutes.) These are two open-ended questions, but it would really help me out when I make my recommendations to the hiring managers: Regarding interviewing etiquette, should I attempt to determine whether a person really possesses all of the skills they claim to have? Can I do this without making the candidate feel uncomfortable? Regarding the final decision, should I recommend candidates who are genuinely qualified for the positions they're applying for, even if they've fabricated portions of their skillset?

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• Is it my responsibility to code for errors on a completely separate website and domain when redirecting or doing a single sign on?

  - by kappasims

  If my application is responsible for redirecting/doing a single sign on to a destination managed by a third party, in general, where should I draw the line for error handling during this process? If an error happens on the other application's end, is it reasonable for my stakeholder to expect the application I am working with to share responsibility for handling these scenarios? Notes: I am going to keep solutions limited to those that entail only one request--I am familiar with the "do an xmlhttprequest and see how that fares before doing anything else" approach. I am speaking in terms of an enterprise-level application with fairly decent customer traffic.

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• When to use abstract classes instead of interfaces and extension methods in C#?

  - by Gulshan

  "Abstract class" and "interface" are similar type of ideas, while interface being more abstract. One need of abstract classes was to provide method implementations for the derived classes. But in C#, that need has also been reduced by lately introduced extension methods. So, in C#, when should we use abstract classes instead of using interfaces and extension methods associated with the interface? And now, we can use 'Properties' in interfaces also. A notable example of interface+ extension methods is the Heavily used IEnumerable and it's helper methods. You use Linq and it's all by this extension methods!

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• unseen/unknown function definition in linux source

  - by Broncha

  Can any one please explain this piece of code I found in the linux kernel source. I see a lots of code like this in linux and minix kernel but dont seem to find what it does (even if C compilers support that kind of function definition) /* IRQs are disabled and uidhash_lock is held upon function entry. * IRQ state (as stored in flags) is restored and uidhash_lock released * upon function exit. */ static void free_user(struct user_struct *up, unsigned long flags) __releases(&uidhash_lock) { uid_hash_remove(up); spin_unlock_irqrestore(&uidhash_lock, flags); key_put(up->uid_keyring); key_put(up->session_keyring); kmem_cache_free(uid_cachep, up); } I cannot find out if this reference __releases(&uidhash_lock) before the parenthesis starts is allowed OR supported. (It sure is supported as it is in the linux kernel)

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• Link between tests and user stories

  - by Sardathrion

  I have not see these links explicitly stated in the Agile literature I have read. So, I was wondering if this approach was correct: Let a story be defined as "In order to [RESULT], [ROLE] needs to [ACTION]" then RESULT generates system tests. ROLE generates acceptance tests. ACTION generates component and unit tests. Where the definitions are the ones used in xUnit Patterns which to be fair are fairly standard. Is this a correct interpretation or did I misunderstand something?

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• Is it appropriate for a class to only be a collection of information with no logic?

  - by qegal

  Say I have a class Person that has instance variables age, weight, and height, and another class Fruit that has instance variables sugarContent and texture. The Person class has no methods save setters and getters, while the Fruit class has both setters and getters and logic methods like calculateSweetness. Is the Fruit class the type of class that is better practice than the Person class. What I mean by this is that the Person class seems like it doesn't have much purpose; it exists solely to organize data, while the Fruit class organizes data and actually contains methods for logic.

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• Do you actively look for a better job?

  - by Ace

  ...Even though you're basically happy where you are? I've been thinking for a while that it might be a good idea to look around, but how do you go about doing it? Do you hide the fact from your employer? What do you tell the recruiters? Can you play your current employer out against the new recruiter or vice versa, and how do you do that? Any pitfalls? Edit: I've bolded the questions that people haven't really answered yet.

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• Teacher demands excessive/unjustified use of Design Patterns

  - by SoboLAN

  I study computer science and I have a class called "Programming Techniques". Its purpose is to teach (us) good object oriented design principles. During the semester we have homeworks, programs that we must write to demonstrate what we've learned. The lab assistant demands for each of these homeworks that specific design patterns should be used. For example, the current homework is an application used for processing customer orders. We are demanded to use either "Factory Method" or "Abstract Factory" design patterns for this. It gets even worse: at the end of the semester we must write a program (something more complex) that must use at least one creational pattern, at least one structural pattern and at least one behavioural pattern. Is it normal to demand this ? I mean, forcing us to design our programs in such a way that a specific design pattern makes sense is just beyond what I consider ok. If I'm a car mechanic and have a huge tool box, then I will use a certain tool from that box if and when the situation demands it. Not more, not less. If my design of the application doesn't demand at all the use of "Abstract Factory" (for example), then why should I implement it ? I'm not sure yet if the senior lecturer agrees with what the lab assistant is demanding, but I want to talk to him about it and I need solid arguments to do so. How should I approach this problem with him ? PS: I'm sure there must be a better way to teach us these things. Maybe making us each week read about 3 design patterns and the next week giving us a test with small but specific programming or architectural situations/problems. The goal in that test would be to identify what design patterns would make sense and how they could be implemented. This way, he can see if we understand them. EDIT: These homeworks are not just 100-line programs, they have quite a lot of requirements and are fairly complicated. This is the reason we have about 2 - 3 weeks of deadline for each of them. I agree that practicing this is the best way to learn. But shouldn't smaller programs/applications be used for this ? Something just for demonstrating purposes. Not big programs with lots of requirements/classes/etc.

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• Working on someone else's code

  - by Xavi Valero

  I have hardly a year's experience in coding. After I started working, most of the time I would be working on someone else's code, either adding new features over the existing ones or modifying the existing features. The guy who has written the actual code doesn't work in my company any more. I am having a hard time understanding his code and doing my tasks. Whenever I tried modifying the code, I have in some way messed with the working features. What all should I keep in mind, while working over someone else's code?

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• Open Source developers: Need your help to answer an 8-minute academic survey

  - by Yi Wang

  I am a research in University of California, Irvine (UCI). I am conducting a research on collaboration tool usage in Open Source development. Your answers will help us to develop new, powerful tools in future. The link of this survey is: http://edu.surveygizmo.com/s3/1035227/Attitude-and-Usage-of-Collaboration-Tools-in-Open-Source-Software-Development The survey only takes you 5-8 mins. thanks a lot for you help!

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• What are some good Photo and Artwork APIs?

  - by Ryan T

  We had an idea for starting a ecards service and were looking into the possibility of populating our site using photo/artwork APIs. Due to legal reasons, Flikr probably won't work, although I've started to scour the web for other options. Basically we just need two functions the user should be able to browse the site's collection and choose a picture we should be able to recall and render a specific picture on our site. From there we should have no problem building our application. The main obstacle is that we're lacking content at the moment. I haven't been able to find too many examples of this being done, so I was wondering if anyone here might know people who have done something similar to what we're trying to do, or know of any leads that might be able to help us out. Suggestions for other APIs that are out there, or forums/communities that might be able to point us in the right direction are also welcome.

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• How do I overcome paralysis by analysis when coding?

  - by LuxuryMode

  When I start a new project, I often times immediately start thinking about the details of implementation. "Where am I gonna put the DataBaseHandler? How should I use it? Should classes that want to use it extend from some Abstract superclass..? Should I an interface? What level of abstraction am I going to use in my class that contains methods for sending requests and parsing data?" I end up stalling for a long time because I want to code for extensibility and reusability. But I feel it almost impossible to get past thinking about how to implement perfectly. And then, if I try to just say "screw it, just get it done!", I hit a brick wall pretty quickly because my code isn't organized, I mixed levels of abstractions, etc. What are some techniques/methods you have for launching into a new project while also setting up a logical/modular structure that will scale well?

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• Learning how to integrate JavaScript with other languages

  - by beacon

  After learning JavaScript syntax, what are some good resources for learning about integrating JavaScript with other languages (HTML, XML, CSS, PHP) to create real, useful applications? I'm most interested in reading articles or other people's code - not so interested in books. Basically, I'm looking to move from programming puzzle-solvers to programming complex applications and could use some advice.

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• Unit test SHA256 wrapper queries

  - by Sam Leach

  I am just beginning to write unit tests. So please bear with me. I have the following SHA256 wrapper. public static string SHA256(string plainText) { StringBuilder sb = new StringBuilder(); SHA256CryptoServiceProvider provider = new SHA256CryptoServiceProvider(); var hashedBytes = provider.ComputeHash(Encoding.UTF8.GetBytes(plainText)); for (int i = 0; i < hashedBytes.Length; i++) { sb.Append(hashedBytes[i].ToString("x2").ToLower()); } return sb.ToString(); } Do I want to be testing it? If so, what do you recommend? My thought process is as follows: What logic is there here. The answer is my for loop and ToString("x2") so from my understanding I want to be testing this part? I can assume Encoding.UTF8.GetBytes(plainText) works. Correct assumption? I can assume SHA256CryptoServiceProvider.ComputeHash() works. Correct assumption? I want to be only testing my logic. In this case is limited to the printing of hex encoded hash. Correct? Thanks.

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