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  • check params['Filedata'] in rails.

    - by krunal shah
    How to check that my params['Filedata'] is corrupted or not? I have function it's reading file from params['Filedata'] and writing it to the other file. File.open(upload_file, "wb") { |f| f.write(params['Filedata'].read) } this line working fine for me.. But when i am calling this function with delayed job funtion send_later than I am getting error with params['Filedata'].read.

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  • Equivalent of libwww-perl in .NET or Java

    - by voidvector
    I have written a crawler in Perl awhile back and it was super simple giving the high-level capability of libwww-perl. It is so straight forward in fact, it can take the raw HTML response of one request, and create the next HTTP request for you from the FORMs on that page (as in it will parse the HTML for you). Does anyone know any library like this on .NET or Java? Selenium is out of question because it requires the browser to be open, which we cannot accommodate in our implementation)

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  • Using python to write text files with DOS line endings on linux

    - by gaumann
    I want to write text files with DOS/Windows line endings '\r\n' using python running on Linux. It seems to me that there must be a better way than manually putting a '\r\n' at the end of every line or using a line ending conversion utility. Ideally I would like to be able to do something like assign to os.linesep the separator that I want to use when writing the file. Or specify the line separator when I open the file.

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  • Silverlight Marching Ants Image Selection

    - by Ben Herila
    (Silverlight 3) Is there a pre-existing (preferably free, even better if open source) method (either a control or source code) for dragging a "marching ants" style selection on an image in a ScrollViewer or on a Canvas, similar to how it's done in image editing software? Even better if the resulting selection box has adjustment handles.

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  • Using ListViews on the Android?

    - by Robert
    Hey everyone, I am just getting started with the Android SDK and I had a quick question. I am trying to set up a ListView with a rectangle of color on the left and then a bit of text for each row. I also want to make it so I can click each entry in the list and open a new activity to display some information (similar to the contact list). Anyone have any examples to help me out? Thanks a ton, Robert Hill

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  • Winform without .NET framework ?

    - by Karthick
    Hi, I have to create few forms and give it as direct EXE (instead of installer, which installs .NET framework, which the end user is not happy, they want something they can directly open and work). I know it can be done as web, but am looking for winforms? Please suggest which tool/technology can handle this? Thanks, Karthick

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  • How can Swing dialogs even work?

    - by Bart van Heukelom
    If you open a dialog in Swing, for example a JFileChooser, it goes somewhat like this pseudocode: swing event thread { create dialog add listener to dialog close event { returnValue = somethingFromDialog } show dialog (wait until it is closed) return returnValue } My question is: how can this possibly work? As you can see the thread waits to return until the dialog is closed. This means the Swing event thread is blocked. Yet, one can interact with the dialog, which AFAIK requires this thread to run. So how does that work?

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  • C: cross-platform RS232 serial library?

    - by Hamza
    Hi folks, I am looking for an open source cross-platform library for working with the serial port in C, something along the lines of the awesome pyserial library (Unfortunately I have to use C for this application) I have only found this one: http://www.teuniz.net/RS-232/ and that doesn't seem to have mention OSX compatibility. Any recommendations/comments would be greatly appreciated. Thanks.

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  • Ruby SerialPorts

    - by Seth Archer
    I'm using the ruby serial port gem. After I open up the port I send the data I want like this. sp.write [200.chr, 30.chr, 7.chr, 5.chr, 1.chr, 2.chr, 0.chr, 245.chr].to_s It doesn't work, but if I put it in a loop of around 200 times: 200.times do sp.write [200.chr, 30.chr, 7.chr, 5.chr, 1.chr, 2.chr, 0.chr, 245.chr].to_s end It works. Any ideas on why this is happening?

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  • Detecting when a handler couldn't be started when embedding Jetty

    - by scompt.com
    I'm embedding Jetty in a similar manner as described here. When the RequestLogHandler can't open the specified logfile, it throws an exception which is unfortunately caught by org.eclipse.jetty.server.Server and swallowed (but logged first, at least). This means that there's no obvious way for me to tell if the log handler was started correctly. Is there a way that I'm missing to detect when a handler couldn't start?

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  • Shut down windows service based on load

    - by JP
    Hello, I was wondering if there are any free / open source solutions that will start and stop a windows service based on load? I have some pubsub subscriber services that do background work which is not critical. Ideally i would like tot be able to automate things so that these services could start if memory/cpu/disk i/o was under a certain threshold and stop gracefully if that threshold was met. Do you know of any solutions? Thanks JP

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  • Reassociate .SQL files with VS T-SQL Editor

    - by Scott
    I seem to have lost the association from .sql files to the default VS T-SQL editor. I'm using Visual Studio 2008. When i open a .sql file it opens using a text editor with no syntax highlighting. How do I reassociate all .sql files with the default T-SQL editor while inside Visual Studio?

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  • GLEW + VS2010 error

    - by Egon
    Hi folks, I am running into this issue and don't know what to do ? 'abc.exe': Loaded 'D:\Windows\SysWOW64\nvoglv32.dll', Cannot find or open the PDB file earlier I was getting a whole bunch of errors, but the microsoft symbols source set the issue for all of them except this one file : nvoglv32.dll ; does anybody know how I can resolve this issue or get my hands on the file "nvoglv32.pdb" ? Thanks -A

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  • RCP applicatoon activities

    - by Peter
    I have a problem with my RCP application. First, I defined an activity in my plugin.xml: <extension point="org.eclipse.ui.activities"> <activity id="myproject.view.input.activity" name="myproject.view.input.activity"> <enabledWhen> <with variable="myproject.view.input.active"> <equals value="ENABLED"> </equals> </with> </enabledWhen> </activity> <activityPatternBinding activityId="myproject.view.input.activity" pattern="myproject.gui/myproject.view.input"> </activityPatternBinding> Then i defined my SourceProvider: <extension point="org.eclipse.ui.services"> <sourceProvider provider="myproject.util.CommandState"> <variable name="myproject.view.input.active" priorityLevel="workbench"> </variable> And, finally, my CommandState class: public class CommandState extends AbstractSourceProvider { public final static String OUTPUT_VIEW = "myproject.view.input.active"; // then goes some others variables, i just skip them // .... public final static String [] ACTIONS = {OUTPUT_VIEW /*and all others variables*/}; public final static String ENABLED = "ENABLED"; public final static String DISENABLED = "DISENABLED"; private final Map <String, String> currentState = new HashMap <String, String> (); @Override public void dispose() { } @Override public String[] getProvidedSourceNames() { return ACTIONS; } @Override public Map <String, String> getCurrentState() { return currentState; } public void setEnabled(boolean enabled, String [] commands) { String value = enabled ? ENABLED : DISENABLED; for (String command : commands) { currentState.put(command, value); fireSourceChanged(ISources.WORKBENCH, command, value); } } } In my Login window, application checks user permissions, and enable or disable views, commands, etc. with setEnabled method of CommandState. For commands it works fine, they are enabling or disabling correctly. But when i try to disable view and open perspective, that contains that view (myproject.view.input), it opened without that view, but also throws exception: !STACK 1 org.eclipse.ui.PartInitException: Could not create view: myproject.view.input at org.eclipse.ui.internal.ViewFactory.createView(ViewFactory.java:158) I can show full stacktrace if anyone want. I tried to debug my application and before i open my perspective whith that view, i checked currentState of my CommandState source provider, and all seemes to be ok: all variables values are correct and myproject.view.input.active = DISABLED Can anyone say, why exception is thrown? Thanks for any help. Sorry for big post and bad language

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  • unformatted input to a std::string instead of c-string from binary file.

    - by posop
    ok i have this program working using c-strings. I am wondering if it is possible to read in blocks of unformatted text to a std::string? I toyed arround with if >> but this reads in line by line. I've been breaking my code and banging my head against the wall trying to use std::string, so I thought it was time to enlist the experts. Here's a working program you need to supply a file "a.txt" with some content to make it run. i tried to fool around with: in.read (const_cast<char *>(memblock.c_str()), read_size); but it was acting odd. I had to do std::cout << memblock.c_str() to get it to print. and memblock.clear() did not clear out the string. anyway, if you can think of a way to use STL I would greatly appreciate it. Here's my program using c-strings // What this program does now: copies a file to a new location byte by byte // What this program is going to do: get small blocks of a file and encrypt them #include <fstream> #include <iostream> #include <string> int main (int argc, char * argv[]) { int read_size = 16; int infile_size; std::ifstream in; std::ofstream out; char * memblock; int completed = 0; memblock = new char [read_size]; in.open ("a.txt", std::ios::in | std::ios::binary | std::ios::ate); if (in.is_open()) infile_size = in.tellg(); out.open("b.txt", std::ios::out | std::ios::trunc | std::ios::binary); in.seekg (0, std::ios::beg);// get to beginning of file while(!in.eof()) { completed = completed + read_size; if(completed < infile_size) { in.read (memblock, read_size); out.write (memblock, read_size); } // end if else // last run { delete[] memblock; memblock = new char [infile_size % read_size]; in.read (memblock, infile_size % read_size + 1); out.write (memblock, infile_size % read_size ); } // end else } // end while } // main if you see anything that would make this code better please feel free to let me know.

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  • Why not use Git?

    - by Tom R
    A lot of people like git (in particular this guy) against other SCMs such as SVN, but many projects, even new ones, are set up using alternative SCMs. Furthermore, Google Code still does not support it (although many of their large open source projects use it). My question is: what are the reasons for not using git in any project, whether it be personal or collaborative? Maybe I've just been brainwashed by this guy, but I can't see any area in which other SCMs excel over git.

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  • Deterministic Annealing Code

    - by wade
    I would like to find an open source example of a code for deterministic annealing. It can be in almost any language: C, C++, MatLab/Octave, Fortran. I have already found a MatLab code for simulated annealing, so MatLab would be best. Here is a paper that describes the algorithm: http://www.google.com/url?sa=t&source=web&ct=res&cd=1&ved=0CB8QFjAA&url=http%3A%2F%2Fvandamteaching.googlepages.com%2FABriefIntroductionToDeterministicAnn.pdf&ei=DiLiS8qZFI7AMozB1JED&usg=AFQjCNHLps7HRWXLNN5rAX5aJ5BsJbcHuQ&sig2=YSokUTOs0UszAFZ9TDiJgQ

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  • Java wiki engine

    - by Mite Mitreski
    There are plenty of java wiki engines http://java-source.net/open-source/wiki-engines I'm currently looking for good lightweight wiki , something like the community wiki on stackoverflow , that can be easily integrated into excising applications. Please write about something that you have used.

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  • Delphi: How to set the default project in a project group?

    - by Ian Boyd
    i have two projects in a project group: ProjectA ProjectB Whenever i open the ProjectGroup.bpg in Delphi, it always starts with the 2nd project as the active one: ProjectA ProjectB And every time i have to flip it to the the "real" project: ProjectA ProjectB How can i make ProjectA the default project that opens with the project group? ProjectGroup.bpg #------------------------------------------------------------------------------ VERSION = BWS.01 #------------------------------------------------------------------------------ !ifndef ROOT ROOT = $(MAKEDIR)\.. !endif #------------------------------------------------------------------------------ MAKE = $(ROOT)\bin\make.exe -$(MAKEFLAGS) -f$** DCC = $(ROOT)\bin\dcc32.exe $** BRCC = $(ROOT)\bin\brcc32.exe $** #------------------------------------------------------------------------------ PROJECTS = ProjectA.exe ProjectB.exe #------------------------------------------------------------------------------ default: $(PROJECTS) #------------------------------------------------------------------------------ ProjectA.exe: ProjectA.dpr $(DCC) ProjectB.exe: childfolder\ProjectB.dpr $(DCC)

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  • Writing reports with Perl

    - by georgemp
    Hi, I am trying to write out multiple report files using perl. Each file has the same structure, but with different data. So, my basic code looks something like #begin code our $log_fh; open %log_fh, ">" . $logfile our $rep; if (multipleReports) { while (@reports) { printReport($report[0]); } } sub printReports { open $rep, ">" . $[0]; printHeaders(); printBody(); close $rep; } sub printHeader() { format HDR = @>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> $generatedLine . format HDR_TOP = . $rep->format_name("HDR"); $rep->format_top_name("HDR_TOP"); $generatedLine = "test"; write($rep); $generatedLine = "next item"; write($rep); $generatedLine = "last header item"; write($rep); } sub printBody #There are multiple such sections in my code. For simplicity, I have just shown 1 here { #declare own header and header top. Set report to use these and print items to $rep } #end code The above is just a high level of the code I am using and I hope I have captured all the salient points. However, for some reason, I get the first report file output correctly. The second file instead of having in the first section test next item last item reads last item last item last item I have tried a whole lot of options primarily around autoflush, but, for the life of me can't figure out why it is doing this. I am using Perl 5.8.2. Any help/pointers much appreciated. Thanks George

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