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• New website, plans to go large. How do you protect yourself?

  - by John Redyns

  I'm planning to create a new site that (in hopes) will make it to a decent state of popularity and use. I have made sites before, but they weren't serious, with any intended purpose other than personal and friend use. I've never been able to find a solid post on good steps to protecting yourself, and your site/idea before you start. This site will always be free, and will not be bringing it any revenue by ads or whatnot, but I plan to in the future and would want to make I'm in the clear legally for one. Do you need to copyright anything? Or anything of the same concept as copyright? Do I make an LLC to operate it under? Apologies for this extremely poorly written question, basically I want to be both legal, and I want to make sure nobody can just rip my idea or name(s). (I'm sure this will be more concise as questions here are asked) Thanks

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• Would you want a language to support something like "Retry/Fix"?

  - by Aaron Anodide

  I was just wondering if a language could support something like a Retry/Fix block? The answer to this question is probably the reason it's a bad idea or equivalent to something else, but the idea keeps popping into my head. void F() { try { G(); } fix(WrongNumber wn, out int x) { x = 1; } } void G() { int x = 0; retry<int> { if(x != 1) throw new WrongNumber(x); } } After the fix block ran, the retry block would run again...

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• What are the most important languages to localize for on the App Store?

  - by Kevin Y

  It's obvious that to gain more customers on any given platform, one of the most important steps to take would be to localize your software into many languages: as many as possible, ideally. However, with independently developed apps, it tends to be difficult to localize into many different languages, due to not having the budget and / or time to do so. My question is if I were to localize my apps into languages other than English on the iOS App Store, which languages should I prioritize? (Maybe the top three or four most important.) (Also, let's pretend this is a generic app that won't cater more to one language demographic than another.)

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• Tab Sweep - Devoxx questions, GlassFish Rest, APAC Java, Lift, JEPs, tools, ...

  - by alexismp

  Recent Tips and News on Java, Java EE 6, GlassFish & more : • Submit a question for Devoxx 2011 Keynotes (Moderator questions) • Devoxx for Java developers (The Java blog) • GlassFish REST Client: ComplexExample.java (Jason) • Oracle Technology Network site for Asia-Pacific developers (OTN APAC) • Notes on deploying Lift apps to GlassFish (Antonio) • Using JSR-250's @PostConstruct Annotation to Replace Spring's InitializingBean (DZone) • The future is in the JEPs (Stephen) • Comparison of Eclipse 3.6 and IntelliJ IDEA 10.5: Pros and Cons (Dzone)

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• How to safely back up the "Private" folder?

  - by ImaginaryRobots

  I have an ecryptfs "Private" folder in my home directory, and it is set up to automatically mount whenever I log in. I want to set up automatic backups to a network drive, but I don't want the contents of Private to be readable on the remote server. My understanding is that the Ubuntu "Backup" utility would run while I'm logged in, so it would see the folder contents without encryption. I'm backing up from a laptop, so it is essentially only on when I am logged in. I know that the Private folder is essentially a mounted filesystem, so it seems like I should be able to backup the encrypted image rather than the cleartext contents. What steps are needed to safely back it up, while maintaining the encryption? Note that I'm already familiar with the backup tools available, this question is about dealing with the ecryptfs folder safely.

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• Why does Unity in 2d mode employ scaling and the default othographic size the way it does?

  - by Neophyte

  I previously used SFML, XNA, Monogame, etc to create 2d games, where if I display a 100px sprite on the screen, it will take up 100px. If I use 128px tiles to create a background, the first tile will be at (0,0) while the second will be at (129,0). Unity on the other hand, has its own odd unit system, scaling on all transforms, pixel-to-units, othographic size, etc etc. So my question is two-fold, namely: Why does Unity have this system by default for 2d? Is it for mobile dev? Is there a big benefit I'm not seeing? How can I setup my environment, so that if I have a 128x128 sprite in Photoshop, it displays as a 128x128 sprite in Unity when I run my game? Note that I am targeting desktop exclusively.

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• What are some good examples of using pass by name?

  - by Paul

  When I write programs I using pass by value or pass by reference always seem to be logical methods. When learning about different programming languages I came across pass by name. Pass by name is a parameter passing method that waits to evaluate the parameter value until it is used. See Stack Overflow pass by name question for more information on the method. What I would like to know is: what are some good examples and/or reasons to use pass by name and should it be re-introduced into some more modern languages.

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• When should one use "out" parameters?

  - by qegal

  In Objective-C, there are several methods like initWithContentsOfFile:encoding:error: where one passes in a reference to an NSError object for the error: parameter. In this example, the value of the NSError object passed in can change based on what goes on at runtime when the method is being called and whether the body of the method was executed in a certain way successfully. In a way I think of this NSError object as sort of like a second return value from the method, and only differs from an object anObject in the statement return anObject; in that when this statement is called, execution leaves the method. So my question is, not only in the context of error handling in Objective-C, but in general, when should one use an "out" parameter in place of returning said value in a return statement?

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• What is Perl's relation to hackers? [closed]

  - by K.Steff

  I know Perl is a language revered by many hackers (as in hacker vs cracker) and respected by many good programmers for its expressiveness. I also realize it is useful to know and it's very handy at generalizing common Unix tasks (Unix here includes Linux and Cygwin). I also know that being a good hacker probably means you're a good programmer in general (references on this one are sparse around the web, but about everything Paul Graham has ever written seems approving of this statement to me). So my question is whether there is a reason that attracts hackers to Perl in particular? Will learing Perl improve my general programming, problem-solving and hacking skills if done properly? Does it present unique tools that are more useful to a hacker?

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• DRY, string, and unit testing

  - by Rodrigue

  I have a recurring question when writing unit tests for code that involves constant string values. Let's take an example of a method/function that does some processing and returns a string containing a pre-defined constant. In python, that would be something like: STRING_TEMPLATE = "/some/constant/string/with/%s/that/needs/interpolation/" def process(some_param): # We do some meaningful work that gives us a value result = _some_meaningful_action() return STRING_TEMPLATE % result If I want to unit test process, one of my tests will check the return value. This is where I wonder what the best solution is. In my unit test, I can: apply DRY and use the already defined constant repeat myself and rewrite the entire string def test_foo_should_return_correct_url(): string_result = process() # Applying DRY and using the already defined constant assert STRING_TEMPLATE % "1234" == string_result # Repeating myself, repeating myself assert "/some/constant/string/with/1234/that/needs/interpolation/" == url The advantage I see in the former is that my test will break if I put the wrong string value in my constant. The inconvenient is that I may be rewriting the same string over and over again across different unit tests.

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• Does a code inherit GNU GPL if it just link to GPL librrary?

  - by user14284

  Sorry for bad English. Suppose there is a library xxx under GNU GPL, that provide a function yyy. Suppose my code links to the library and use this function. Does my code inherit GPL license? IANAL, but my thoughts are conflicting: On other hand, my code is derivative from the library, so it should inherit GPL. On other hand, my code just use link to the xxx. Maybe there are other libraries, that has the same interface (particularly, they provide yyy function with same functionality, but different implementation). My code may link to any. My code really doesn't directly derived from xxx, it just use its interface. So, my code shouldn't inherit GPL. I'm confused. ADDED. The question is absolutely abstract. I don't mean any concrete GPL library.

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• Tab navigation and double content

  - by Guisasso

  I have a website in which i use tabs to navigate between pages. For example, page a displays A as an active tab and B and C background tabs. If the visitor gets to the website via page B, i also would like to display to page d, but not a and c. Question: I know i can just create index2 for b for example, so when the visitor gets to b from a, i display a,b,c and index1 when visitor gets to b from d for example. Is that a bad practice? I know double content isn't good, but in which other way can i or should i approach this problem? The tab navigation i designed uses < li and id tag do display active tab, defined in the < body tag.

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• Which are the most frequent exceptions thrown in Java applications? [on hold]

  - by Chris

  1. Do you know of any statistics about the frequency of exceptions (checked and unchecked) thrown at runtime in typical Java applications? for example: NullPointerException: 25% of all exceptions ClassCastException: 15% of all exceptions etc. 2. Which are the most frequent exceptions according to your own experiences? 3. Would you agree that the NullPointerException is generally the most often thrown exception? I am asking this question in the context of the compiler development of the PPL programming language (www.practical-programming.org). The goal is to auto-detect a maximum of frequent exceptions at compile-time. For example, detecting all potential NullPointerExceptions at compile-time leads to null-safe software which is more reliable.

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• How to solve linear recurrences involving two functions?

  - by Aditya Bahuguna

  Actually I came across a question in Dynamic Programming where we need to find the number of ways to tile a 2 X N area with tiles of given dimensions.. Here is the problem statement Now after a bit of recurrence solving I came out with these. F(n) = F(n-1) + F(n-2) + 2G(n-1), and G(n) = G(n-1) + F(n-1) I know how to solve LR model where one function is there.For large N as is the case in the above problem we can do the matrix exponentiation and achieve O(k^3log(N)) time where k is the minimum number such that for all km F(n) does not depend on F(n-k). The method of solving linear recurrence with matrix exponentiation as it is given in that blog. Now for the LR involving two functions can anyone suggest an approach feasible enough for large N.

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• Can aynone tell me what exactly 32bit/64bit and x86 and AMD64 have to do with the different choices on the download site of Ubuntu?

  - by Elysium

  SORRY for the newbie question, but I am still learning. I am wondering if x86 simply refers to the intel CPUs and AMD64 simply refers to the AMD CPUs? While....32bit and 64bit to the processor types? I was trying to download the intel 64bit version of the Ubuntu installer, but it wont give the option of x86 and AMD64....only the 32bit and 64bit can be chosen. Does this mean that someone with an Intel CPU and another person with an AMD CPU will download the same install file? (obviously depending on the bit version of their CPUs this might differ....but that's another thing).

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• How to balance this Pokémon simulator metagame by feedback?

  - by Dokkat

  This is a Pokémon simulator where you build a team of 6 pokémon and battle with someone. Unfortunately, some Pokémon are stronger than others and only a few of the hundredth species are practical. I'm trying to create a metagame where all of them are competitive. For this, I am tagging a Pokémon with a parameter (level) that changes it's strength and scales up/down depending on the it's performance. That is, if the system detects Mewtwo is overperforming, it should decrease it's level tag until Mewtwo is balanced. The question is: how can I identify if a Pokémon is causing an unbalance? The data I have is the historic of the battles (player 1, player 2, pokémon list, winner). The most basic solution I can think of is victory/loss counting.

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• Getting SSL certificate for a sub-domain

  - by Hemant

  Our company owns a domain say www.mycompany.com. I understand that it is trivial to get an SSL certificate for above domain since we do have a website running on that address. We want a certificate for a subdomain say sub.mycompany.com. We intend to use this sub-domain in our organisation network only and have no plans to publish a public website on this subdomain. So the question is "Is it necessary to have a DNS entry for subdomain, resolving to our IP address and host some page on that address?" I hope proving that main domain is in our control, we can get an SSL certificate for sub domain also. Is it possible?

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• How to draw tile edges when you don't know where they're going.

  - by Skeith

  This is more of an art question than a programing one but still game development. I have a tile engine that makes a map randomly from tiles, each tile is a square 3x3 grid. The problem is that while the elements on each tile work well together such as having forests along the top three squares and grass on the other 6, the engine could put the forrests against anything such as rivers, grass, mountains or more forest. how can i draw the edges of the tiles so the look good no matter what they are places against ?

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• Rationale behind freeware projects

  - by VexXtreme

  I've seen some freeware projects in the past where the author(s) invested a significant amount of their personal time and resources and never even considered charging for the software. A lot of these projects were donation based, and from what I've heard, donationware can never be a viable business model (even to simply support development costs) because most people choose not to donate if given an option. A lot of these projects eventually shut down because their authors could not sustain them further. Granted, some people simply like making the community happy (or something), but if you're struggling to keep your project alive, why not charge some small amount such as $10 simply to stay operational? If people find your software useful (and a lot of people found those projects VERY useful) they won't have a problem paying such a small amount. The question is: if you have a popular app that people like and download in great numbers, why not put a price tag on it? Why do it for free?

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• sell applications that run only on a GPL v2 Server

  - by gadri mabrouk

  I have been testing Pentaho BI server community edition, and after reading their licensing terms I found out that the community edition is under GPLv2. As you may know the server is intended to host different types of files and applications (like reports, olap cubes,etc...) My question is : are we allowed to sell applications that run on the GPLv2 server ? (we will maybe modify the server source code a bit but we won't charge it to our clients. thus the modified GPL server will be just an execution environment or a container for the reports and applications that we intend to sell) ? this suggests that our clients must install the GPL v2 edition first and then buy from us the reports that work on it but not their source code. Thanks in advance.

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• Class Versus Struct

  - by Prometheus87

  In C++ and other influenced languages there is a construct called Structure (struct) and we all know the class. Both are capable of holding functions and variables. some differences are 1. Class is given memory in heap and struct is given memory in stack 2. in class variable are private by default and in struct thy are public My question is that struct was somehow abandoned for Class. Why? other that abstraction, a struct can do all the same stuff a class does. Then why abandon it?

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• Preventing Duplicates on Google

  - by abel

  I am currently using a rewrite rule to enable access to .php pages, without using the php extension. However to prevent old links from breaking, the pages can still be accessed via links containing the .php extension too. For eg. domain.com/page.php can now be accessed at domain.com/page All the links on the website now use domain.com/page type links within the site. However older incoming links will still link to the .php pages, meaning Google will index both pages and mark them as duplicate. I have two plans to remedy the situation. Use a php 301 redirect: When a page is accessed with the .php extension, I can redirect each page individually using a 301 redirect using php Using Canonical: Place a canonical tag on each page, pointing to the ".php" less version My Question: Are both methods equally efficacious in preventing Google from indexing my ".php" pages? Which method should be preferred, by convention or otherwise?

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• If all variables are a subset of the superkey, is the database design 5NF? [migrated]

  - by Lukazoid

  I have a table called LogMessages, which has the following columns: Level A numeric value which represents Trace, Debug, Info, Warning, Error or Fatal Time A UTC time Message Foreign key to a Messages table Source Foreign key to a Sources table User Foreign key to a Users table From what I can see, all of these columns are a part of the super key; if any single value differs to an existing row, a new row can be created. My question is, does this design comply to fifth normal form? I am unsure as some groups of data will be repeating, however I don't believe this violates 5NF? (correct me if I'm wrong)

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• What are common patterns for handling possible pluralization in message properties?

  - by C. Ross

  Obviously users like to see text properly pluralized, and pluralization schemes vary in the various written languages one may encounter. When internationalizing an app, what pattern(s) are useful for handling messages with possible pluralization? What about messages with multiple possible pluralization? For example: "N review(s):" One pattern would be reviews.title.singular="{0} review:" reviews.title.singular="{0} reviews:" And this may not support all languages. Or a more complicated case: "Found M question(s) with N comment(s)." This would be difficult to support in English?

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• Is it possible to create a virtual drive and share via USB?

  - by Matthew

  My question is kind of hard to follow, but I'm asking if it's possible to make a virtual flash drive and sync it to another device with a USB to USB cable? To make things more clear, think of a typical flash drive. You connect it to a laptop and it shows up as a removable disk. Is it possible to make a computer a host of a "Virtual Drive" that would be connected to a USB cord on one end, and the other end connecting to another device such as a Xbox 360, or another computer.

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