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• What is the fastest way to scrape HTML webpage in Android?

  - by kunjaan

  I need to extract information from an unstructured web page in Android. The information I want is embedded in a table that doesn't have an id. <table> <tr><td>Description</td><td></td><td>I want this field next to the description cell</td></tr> </table> Should I use Pattern Matching? Use BufferedReader to extract the information? Or are there faster way to get that information?

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• syntax to express mathematical formula concisely in your language of choice

  - by aaa

  hello. I am developing functional domain specific embedded language within C++ to translate formulas into working code as concisely and accurately as possible. Right now my language looks something like this: // implies two nested loops j=0:N, i=0,j (range(i) < j < N)[T(i,j) = (T(i,j) - T(j,i))/e(i+j)]; // implies summation over above expression sum(range(i) < j < N))[(T(i,j) - T(j,i))/e(i+j)]; I am looking for possible syntax improvements/extensions or just different ideas about expressing mathematical formulas as clearly and precisely as possible. Can you give me some syntax examples relating to my question which can be accomplished in your language of choice which consider useful. In particular, if you have some ideas about how to translate the above code segments, I would be happy to hear them Thank you

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• What is the weirdest language you have ever programmed in?

  - by sfoulk526

  For me, it was Forth, way back at the end of the eighties! Yes, almost prehistory. But I was an un-degree-ed programmer, unable to afford college, self-taught C and Assembly, and not enough experience to open doors. I was invited to work in software engineering, my dream job by the engineering manager of my company, but...I had to do it in Forth, and the company was willing to teach me. The position was my start into embedded systems programming, and man did I learn a lot! Like, just how easy C and Assembly language REALLY could be! But it was a good journey, and though I never coded again in Forth, my fear of not being able to learn C and Assembly proficiently disappeared... ;-)

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• Java development in Ubuntu

  - by Veera

  I'm a newbie to Linux systems and recently I started using Ubuntu 10.04. When I do java development in Windows, I usually keep my project files under some drive (D: for example) and under my development folder, such as D:\projects\myproj. But I'm bit confused with Ubuntu's folder structure. So, I just want to know how do you organize your projects in Ubuntu? Under which folder do we keep our projects file?

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• Beginner question about merging in git

  - by wxyz

  I'm 15 and have just started using source control systems to manage my code a little better, so I'm a little new to this stuff. Right now I have this repository: [a]---[b]---[d]---[f] master \ \ [c]---[e] develop I want to wind up here: [a]---[b]---[d]---[f]---[g] master \ / \ / [c]---[e]---/ develop where g is equivalent to performing commits [c] and [e] on [f]. This is git checkout master; git merge develop, right?

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• Bit Flipping in Hex

  - by freyrs

  I have an 8 digit hexadecimal number of which I need certain digits to be either 0 or f. Given the specific place of the digits is there a quick way to generate the hex number with those places "flipped" to f. For example: flip_digits(1) = 0x000000f flip_digits(1,2,4) = 0x0000f0ff flip_digits(1,7,8) = 0xff00000f I'm doing this on an embedded device so I can't call any math libraries, I suspect it can be done with just bit shifts but I can't quite figure out the method. Any sort of solution (Python, C, Pseudocode) will work. Thanks in advance.

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• Long IF tree with strings

  - by DalGr

  I have a C program which uses Lua for scripting. In order to keep readability and avoid importing several constants within the individual Lua states, I condense a large amount of functions within a simple call (such as "ObjectSet(id, "ANGLE", 45)"), by using an "action" string. To do this I have a large if tree comparing the action string to a list (such as "if(stringcompare(action, "ANGLE") ... else if (stringcompare(action, "X")... etc") This approach works well, and within the program it's not really slow, and is fairly quick to add a new action. But I kind of feel perfectionist. Is there a better way to do this in C? And having Lua in heavy use, maybe there is a way to use it for this purpose? (embedded "chunks" making a dictionary?) Although this part is mostly curiosity.

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• Is it possible to find out what FlashBuilder is doing during compilation?

  - by justkevin

  I've found that Flash Builder 4 (formerly Flex Builder) has trouble working with large projects. After a certain point, builds seem to take longer and longer. I've tried many different ways of improving build time including: Moving embedded resources into externally linked projects. Using -incremental. Tweaking the .ini jvm settings including memory and -server. Turning off automatic build (I'd prefer not to have to do this, because one of the main reasons for using an IDE is to be told about errors as you make them). Deleting the project and re-checking out from the repository. While some of these may help a bit, the performance is still annoyingly slow. I feel if I knew what was taking so long I could refactor my projects to build faster. Is there some setting that tells FlashBuilder to let me see what parts of the build process take so much time?

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• Why is it so hard to share resource files (resx) with my Silverlight client?

  - by Jordan

  I'm trying to share a resource file (.resx file) from my web (RIA Service?Silverlight Host) to client (Silverlight) by linking the resource file into my client. When I try to access resources using the ResourceManager object I get the following error: System.Resources.MissingManifestResourceException was caught Message=Could not find any resources appropriate for the specified culture or the neutral culture. Make sure "PPCa.Modules.ProjectManager.Client.ViewModels.ResourceStrings.resources" was correctly embedded or linked into assembly "PPCa.Modules.ProjectManager.Client" at compile time, or that all the satellite assemblies required are loadable and fully signed. StackTrace: at System.Resources.ManifestBasedResourceGroveler.HandleResourceStreamMissing(String fileName) at System.Resources.ManifestBasedResourceGroveler.GrovelForResourceSet(CultureInfo culture, Dictionary`2 localResourceSets, Boolean tryParents, Boolean createIfNotExists, StackCrawlMark& stackMark) at System.Resources.ResourceManager.InternalGetResourceSet(CultureInfo requestedCulture, Boolean createIfNotExists, Boolean tryParents, StackCrawlMark& stackMark) at System.Resources.ResourceManager.InternalGetResourceSet(CultureInfo culture, Boolean createIfNotExists, Boolean tryParents) at System.Resources.ResourceManager.GetString(String name, CultureInfo culture) at System.Resources.ResourceManager.GetString(String name) at PPCa.Modules.ProjectManager.Web.Helpers.ResourceHelper.GetEnumText[TResource](ProjectStatus a_projectStatus) InnerException: Edit: When I say I was linking the resource file, I mean I am using the 'Add as Link' option when adding the existing resx file to my project.

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• iPhone team dev, do we all need the same OS?

  - by aruwanwan

  I´m just starting iPhone development with a small team of (really young and naive) colleagues, we all are fairly new to OS X, my question is: If we are planning to develop for every iPod Touch/iPhone out there (not the iPad, I read that thing requires Snow Leopard), what problems will we encounter when sharing code (and making commits) if we all have a combination of Leopard and Snow Leopard systems?

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• ssrs column groups disable multiple columns

  - by DKS

  I'm using ASP.NET 4.0 Visual Studio 2010 RC version Sql Server Report Services (SSRS) ReportViewer and are aware that columns only display on PDF export - not the preview. I want to use a matrix embedded in a table on a page that has multiple columns. I've done some testing and frustratingly found that if you have a tablix with at least one grouped column (even if there is only one displayed matrix-like column group) the columns seem to be disabled. Once I remove the tablix with a grouped column from the tablix from the report the report does multiple-columns. Does anyone know a way around this?

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• When to choose C over C++?

  - by aaa

  Hi. I have become a fond of C++ thanks to this website. Before, I programmed exclusively in C/Fortran, thinking that C++ was too slow (not anymore). Is there a reason to write new project purely in C? this is besides obvious things like low-level kernel/system components. What about intermediate things, like communication libraries, for example MPI? Is C still more portable than C++? I have messed with pretty exotic systems, like Cray, but have yet to see non-embedded system without C++. thanks

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• How can I create a custom cleanup mode for git?

  - by Danny

  Git's default cleanup of strip removes all lines starting with a # character. Unfortunately, the Trac engine's wiki formatter uses hashes in the beginning of a code block to denote the syntax type. Additionally any code added verbatim might include hashes as they are a common comment prefix; Perl comes to mind. In the following example the comments all get destroyed by git's cleanup mode. Example: {{{ #!/usr/bin/perl use strict; # say hi to the user. print "hello world\n"; }}} I'd like to use a custom filter that removes all lines beginning with a hash from the bottom of the file upwards. Leaving those lines that being with a hash that are embedded in the commit message I wrote alone. Where or how can I specify this in git? Note, creating a sed or perl script to perform the operation is not a problem, just knowing where to hook it into git is the question.

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• In a process using lots of memory, how can I spawn a shell without a memory-hungry fork()?

  - by kdt

  On an embedded platform (with no swap partition), I have an application whose main process occupies most of the available physical memory. The problem is that I want to launch an external shell script from my application, but using fork() requires that there be enough memory for 2x my original process before the child process (which will ultimately execl itself to something much smaller) can be created. So is there any way to invoke a shell script from a C program without incurring the memory overhead of a fork()? I've considered workarounds such as having a secondary smaller process which is responsible for creating shells, or having a "watcher" script which I signal by touching a file or somesuch, but I'd much rather have something simpler.

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• How do you run your unit tests? Compiler flags? Static libraries?

  - by Christopher Gateley

  I'm just getting started with TDD and am curious as to what approaches others take to run their tests. For reference, I am using the google testing framework, but I believe the question is applicable to most other testing frameworks and to languages other than C/C++. My general approach so far has been to do either one of three things: Write the majority of the application in a static library, then create two executables. One executable is the application itself, while the other is the test runner with all of the tests. Both link to the static library. Embed the testing code directly into the application itself, and enable or disable the testing code using compiler flags. This is probably the best approach I've used so far, but clutters up the code a bit. Embed the testing code directly into the application itself, and, given certain command-line switches either run the application itself or run the tests embedded in the application. None of these solutions are particularly elegant... How do you do it?

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• How do I close a form when the ESC key was hit, but only if no Control handled it?

  - by Gabriel

  I have a Form that closes itself when the ESC key is pressed, thanks to KeyPreview, ProcessKeyEventArgs, ProcessCmdKey or whatever. But I have a Control on that form that does very relevant things when ESC is pressed (it hides itself) and the Form should not be closed when that happens. The control uses the KeyDown event and sets the SuppressKeyPress flag to true, but that happens after the aforementioned form key preview, thus having no effect. Is there some sort KeyPostview ? How do I not close the form when a Control has a relevant use of a key hit ? Edit: The control handling ESC is a textbox embedded in a hand-maid ListView. The textbox appears when the user clicks a cell, enabling edition. To validate the new text, ENTER would be nice (that already works, as giving the focus to anything else). To cancel edition, ESC seems most natural.

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• VLC helper protocol on Mac OS X

  - by Preben

  Hey everybody, I am trying to add a vlc:// helper protocol on Mac OS X. To register the protocol, I have unsuccessfully been playing around with the MoreInternet PrefPane. What I want to have in my browser is a vlc://someressource.com/audio.mp3, which should launch VLC and add http://someressource.com/audio.mp3 to the playlist (this works fine on Windows and also Linux if I remember correctly). Maybe even just have vlc://http:// so that https would also be supported. I have no idea how to achieve this. I tried making a bash script, which MoreInternet would not accept. Then I tried making an application through Automator with my Bash script embedded. That did not work either, as the Automator application has no "creator code" - whatever that is?! Can any of you guys point me in the right direction? Thanks in advance!

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• Subtract displaced mask using OpenCV

  - by dario_ramos

  I want to do: masked = image - mask But I want to "displace" mask. That is, move it vertically and horizontally (as long as the intersection between it and image is not empty, this would be valid). I have some hand-coded assembly (which uses MMX instructions) which does this, embedded in a C++ program, but it's unstable when doing vertical displacemente, so I thought of using OpenCV instead. Would it be possible to do this calling only one OpenCV function? Performance is critical; using OpenCV, time should be at least in the same order of magnitude as the assembly code.

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• Error handling and polymorphism

  - by Neeraj

  I have an application with some bunch of code like this: errCode = callMainSystem(); switch (errCode){ case FailErr: error("Err corresponding to val1\n"); case IgnoreErr: error("Err corresponding to val2\n"); ... ... default: error("Unknown error\n"); } The values are enum constants. Will it make some sense to have something like: // Error* callMainSystem() ... Some code return FaileErr(); // or some other error // handling code Error* err = callMainSystem(); err->toString(); The Error class may be made singleton as it only has to print error messages. What are the pros and cons of above methods,size is an important criteria as the application needs to be supported on embedded devices as well. P.S: I don't want to use exception handling because of portability issues and associated overheads.

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• JRuby-friendly method for parallel-testing Rails app

  - by Toby Hede

  I am looking for a system to parallelise a large suite of tests in a Ruby on Rails app (using rspec, cucumber) that works using JRuby. Cucumber is actually not too bad, but the full rSpec suite currently takes nearly 20 minutes to run. The systems I can find (hydra, parallel-test) look like they use forking, which isn't the ideal solution for the JRuby environment.

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• Tool to generated rotated versions of an image

  - by John

  In sprite-based systems, it's common to fake rotation of a sprite by having many different images, each showing it rotated an extra few degrees. Is there any free tool which will take a single image, and output a single image containing several rotations? It should also ideally let us control how many images are in each row. e.g if I have a 32x32 sprite and I want it rotated at 10 degree intervals, the tool might generate a 320x32 file or a 160x64 file

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• How can I merge CSS definitions in files into inline style attributes, using Perl?

  - by mintywalker

  Many email clients don't like linked CSS stylesheets, or even the embedded <style> tag, but rather want the CSS to appear inline as style attributes on all your markup. BAD: <link rel=stylesheet type="text/css" href="/style.css"> BAD: <style type="text/css">...</style> WORKS: <h1 style="margin: 0">...</h1> However this inline style attribute approach is a right pain to manage. I've found tools for Ruby and PHP that will take a CSS file and some separate markup as input and return you the merged result - a single file of markup with all the CSS converted to style attributes. I'm looking for a Perl solution to this problem, but I've not found one on CPAN or by searching Google. Any pointers? Alternatively, are there CPAN modules one could combine to achieve the same result? Ruby http://code.dunae.ca/premailer.web/ PHP http://www.pelagodesign.com/sidecar/emogrifier/ Perl ?

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• IBM i (AS400) updates on new Java releases / Java 7

  - by lemotdit

  Since Java 7 is comming I was wondering how much time it would take to have the IBM JVM running Java 7 on IBM i systems? (AS400) I was searching IBM's site to find some roadmap but didn't find anything yet. Do you have past experience on the older java release?

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• How long until programming becomes a professionally certified (and respected as such) skill such as

  - by Michael Campbell

  Given Toyota's recent issues and the ENORMOUS amount of safety that is being relegated to computers, how long do you think it will be before programming, or perhaps programming certain things (embedded transportation software, (air) traffic control, electrical grid, hospital equipment, nuclear plant security, planes, etc.) becomes regulated? And/or, how long before there will be certain regulated certifications before you can call yourself a "software developer", like Architects and Engineers have now? (NB: I'm from the US, so I don't know how it works in other countries; please forgive my ignornace.)

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• iOS app rejected by itunes team for copyright when embedding video from youtube

  - by Thiru Subramaniam

  I have created a simple app for my client with his selection of youtube videos embedded via iframe player and html5. The app got approved in android store whereas itunes rejected it claiming below, "Apps may not use protected third party material such as trademarks, copyrights, patents or violate 3rd party terms of use. Authorization to use such material must be provided upon request" Below is the link for the app in android. https://play.google.com/store/apps/details?id=com.jayam.shortfilms While I share videos using the html code obtained from youtube share button, still apple is claiming that I should provide evidence of copyright from each video owner. Any experiences of this kind will be very helpful for me.

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