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  • What if I put two kinds of encoded strings, say utf-8 and utf-16, in one file?

    - by jonny
    In Python, for example: f = open('test','w') f.write('this is a test\n'.encode('utf-16')) f.write('another test\n'.encode('utf-8')) f.close() That file gets messy when I re-open it: f = open("test") print f.readline().decode('utf-16') # it leads to UnicodeDecodeError print f.readline().decode('utf-8') # it works fine However if I keep the texts encoded in one style (say utf-16 only), it could read back ok. So I'm guessing mixing two types of encoding in the same file is wrong and couldn't be decoded back, even if I do know the encoding rules of each specific string? Any suggestion is welcome, thank you!

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  • Why is lua crashing after extracting zip files?

    - by Brian T Hannan
    I have the following code but it crashes every time it reaches the end of the function, but it successfully extracts all the files and puts them in the right location. require "zip" function ExtractZipAndCopyFiles(zipPath, zipFilename, destinationPath) local zfile, err = zip.open(zipPath .. zipFilename) -- iterate through each file insize the zip file for file in zfile:files() do local currFile, err = zfile:open(file.filename) local currFileContents = currFile:read("*a") -- read entire contents of current file local hBinaryOutput = io.open(destinationPath .. file.filename, "wb") -- write current file inside zip to a file outside zip if(hBinaryOutput)then hBinaryOutput:write(currFileContents) hBinaryOutput:close() end end zfile:close() end -- call the function ExtractZipAndCopyFiles("C:\\Users\\bhannan\\Desktop\\LUA\\", "example.zip", "C:\\Users\\bhannan\\Desktop\\ZipExtractionOutput\\") Why does it crash every time it reaches the end?

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  • how to develop domain specific language on top of another language ?

    - by sofreakinghigh
    say i found a good open source software/library written in python. i want to wrap some of the functions or methods that i have created into easy to understand language of my own. do porter_stemm(DOC) (the DSL) would be equivalent to the function or series of methods written in python. i want to create a DSL that is easy to learn, but need this DSL translated into the original open source software software. im not sure if i am clear here but my intention is: create an easy to learn code language that users can use to solve a problem in a certain niche. this simple language needs to be translated or compiled or interpretated via some middleware into the original open source software's language (python).

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  • Exception of Binding form data to object

    - by Captain Kidd
    I'm practising Spring MVC.But fail to populate command object in Controller when I use spring standard tag. For example: "form:input path="password"" But I perfectly do this with HTML standard tag. Like: "input type="text" name="password"" I wonder the way how to use Spring tag binding data. In addition, I think configuration and coding is right in my sample. protected ModelAndView onSubmit(HttpServletRequest request, HttpServletResponse response, Object command, BindException errors) throws Exception { UserFormBean b = (UserFormBean)command; System.out.println("s"); return super.onSubmit(request, response, command, errors); } <form:form commandName="command" action="/SpringFrame/register.html"> <form:input path="password"/> <!-- <input type="text" name="password"/> --> <input type="submit"/> </form:form>

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  • Extract a regular expression match in R version 2.10

    - by tovare
    Hi, I'm trying to extract a number from a string. And do something like this [0-9]+ on this string "aaaa12xxxx" and get "12". I thought it would be something like: > grep("[0-9]+","aaa12xxx", value=TRUE) [1] "aaa12xxx" And then I figured... > sub("[0-9]+", "\\1", "aaa12xxxx") [1] "aaa12xxx" But I got some form of response doing: > sub("[0-9]+", "ARGH!", "aaa12xxxx") [1] "aaaARGH!xxx" There's a small detail I'm missing Please advice :-) I'm using R version 2.10.1 (2009-12-14) Thanks ! Comments on the solution The best solution is to ignore the standard functions and install Hadley Wickham's stringr package to get something that actually makes sense. Kudos to Marek for figuring out how the standard library worked.

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  • run browser from remote machine

    - by cathy02
    Hello, I can connect to a remote machine using ssh, I would like to open a URL from the remote machine. Well, I can do this using lynx (a command line browser), but then, javascript etc... gets messed up. Is there a way I can open the URL and see it in my local machine firefox browser for example ?? Thanks

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  • outbound ftp on server 2008 r2 stalls

    - by Scott Kramer
    the built in command line ftp client in server 2008 does not support passive mode so I've used these commands to allow outbound ftp (it stalls without this) 1) Open port 21 on the firewall netsh advfirewall firewall add rule name="FTP (no SSL)" action=allow protocol=TCP dir=in localport=21 2) Activate firewall application filter for FTP (aka Stateful FTP) that will dynamically open ports for data connections netsh advfirewall set global StatefulFtp enable however in server 2008 r2, these commands seem to work, but it does not affect the outbound ftp, it stalls I do not want to use an alt client

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  • segmented reduction with scattered segments

    - by Christian Rau
    I got to solve a pretty standard problem on the GPU, but I'm quite new to practical GPGPU, so I'm looking for ideas to approach this problem. I have many points in 3-space which are assigned to a very small number of groups (each point belongs to one group), specifically 15 in this case (doesn't ever change). Now I want to compute the mean and covariance matrix of all the groups. So on the CPU it's roughly the same as: for each point p { mean[p.group] += p.pos; covariance[p.group] += p.pos * p.pos; ++count[p.group]; } for each group g { mean[g] /= count[g]; covariance[g] = covariance[g]/count[g] - mean[g]*mean[g]; } Since the number of groups is extremely small, the last step can be done on the CPU (I need those values on the CPU, anyway). The first step is actually just a segmented reduction, but with the segments scattered around. So the first idea I came up with, was to first sort the points by their groups. I thought about a simple bucket sort using atomic_inc to compute bucket sizes and per-point relocation indices (got a better idea for sorting?, atomics may not be the best idea). After that they're sorted by groups and I could possibly come up with an adaption of the segmented scan algorithms presented here. But in this special case, I got a very large amount of data per point (9-10 floats, maybe even doubles if the need arises), so the standard algorithms using a shared memory element per thread and a thread per point might make problems regarding per-multiprocessor resources as shared memory or registers (Ok, much more on compute capability 1.x than 2.x, but still). Due to the very small and constant number of groups I thought there might be better approaches. Maybe there are already existing ideas suited for these specific properties of such a standard problem. Or maybe my general approach isn't that bad and you got ideas for improving the individual steps, like a good sorting algorithm suited for a very small number of keys or some segmented reduction algorithm minimizing shared memory/register usage. I'm looking for general approaches and don't want to use external libraries. FWIW I'm using OpenCL, but it shouldn't really matter as the general concepts of GPU computing don't really differ over the major frameworks.

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  • Images to video - converting to IplImage makes video blue

    - by user891908
    I want to create a video from images using opencv. The strange problem is that if i will write image (bmp) to disk and then load (cv.LoadImage) it it renders fine, but when i try to load image from StringIO and convert it to IplImage, it turns video to blue. Heres the code: import StringIO output = StringIO.StringIO() FOREGROUND = (0, 0, 0) TEXT = 'MY TEXT' font_path = 'arial.ttf' font = ImageFont.truetype(font_path, 18, encoding='unic') text = TEXT.decode('utf-8') (width, height) = font.getsize(text) # Create with background with place for text w,h=(600,600) contentimage=Image.open('0.jpg') background=Image.open('background.bmp') x, y = contentimage.size # put content onto background background.paste(contentimage,(((w-x)/2),0)) draw = ImageDraw.Draw(background) draw.text((0,0), text, font=font, fill=FOREGROUND) pi = background pi.save(output, "bmp") #pi.show() #shows image in full color output.seek(0) pi= Image.open(output) print pi, pi.format, "%dx%d" % pi.size, pi.mode cv_im = cv.CreateImageHeader(pi.size, cv.IPL_DEPTH_8U, 3) cv.SetData(cv_im, pi.tostring()) print pi.size, cv.GetSize(cv_im) w = cv.CreateVideoWriter("2.avi", cv.CV_FOURCC('M','J','P','G'), 1,(cv.GetSize(cv_im)[0],cv.GetSize(cv_im)[1]), is_color=1) for i in range(1,5): cv.WriteFrame(w, cv_im) del w

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  • How get file path from std::ifstream in c++

    - by Nilesh Shinge
    Hi All I am opening file using C++ function std::ifstream. I may open file using relative path (file.txt) or absoulte path (C:\test\file.txt). As I am passing string as file name, dont know whether it is relative or absolute path. Can any body tell me how to get absolutre path after file has been successfully open using std::ifstream function. e.g. std::ifstream file(strFile); // strFile = "file.txt" or strFile = "C:\test\file.txt" I want absolute path after file open successfully. Thanks Nilesh

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  • Collect DOM elements from external HTML documents

    - by sonofdelphi
    I am trying to write a report-generator to collect user-comments from a list of external HTML files. User-comments are wrapped in < span elements. Can this be done using JavaScript? Here's my attempt: function generateCommentReport() { var files = document.querySelectorAll('td a'); //Files to scan are links in an HTML table var outputWindow = window.open(); //Output browser window for report for(var i = 0; i<files.length; i++){ //Open each file in a browser window win = window.open(); win.location.href = files[i].href; //Scan opened window for 'comment's comments = win.document.getElementsByName('comment'); for(var j=0;j<comments.length;j++){ //Add to output report outputWindow.document.write(comment[i].innerHTML); } } }

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  • Using SQLite from PowerShell on Windows 7x64?

    - by jas
    I'm having a difficult time trying to load System.Data.SQLite.dll from PowerShell in Windows 7 x64. # x64 [void][System.Reflection.Assembly]::LoadFrom("C:\projects\PSScripts\lib\System.Data.SQLite.x64.DLL") # x86 #[void][System.Reflection.Assembly]::LoadFrom("C:\projects\PSScripts\lib\System.Data.SQLite.DLL") $conn = New-Object -TypeName System.Data.SQLite.SQLiteConnection $conn.ConnectionString = "Data Source=C:\temp\PSData.db" $conn.Open() $command = $conn.CreateCommand() $command.CommandText = "select DATETIME('NOW') as now, 'Bar' as Foo" $adapter = New-Object -TypeName System.Data.SQLite.SQLiteDataAdapter $command $dataset = New-Object System.Data.DataSet [void]$adapter.Fill($dataset) Trying to open the connection with the x64 assembly results in: Exception calling "Open" with "0" argument(s): "An attempt was made to load a program with an incorrect format. (Exception from HRESULT: 0x8007000B)" Trying to load the x86 assembly results in: Exception calling "LoadFrom" with "1" argument(s): "Could not load file or assembly 'file:///C:\projects\PSScripts\lib\System.Data.SQLite.DLL' or one of its dependencies. An attempt was made to load a program with an incorrect format." Any thoughts or ideas?

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  • How do I layout a form in WPF using grid or other controls for maintainability

    - by Jason Coyne
    I have a WPF form, I want to lay out a standard form onto it. Each form element will have a label, and then a control. Pretty standard stuff. If I use a wrap panel, it can cause the label and the control to be separated, but I want them to stay together. is there some WPF equivalent of nobr? Grid works, and allows for column spanning etc, however I really really hate that you specify the column and row on each control. This makes it extremely inconvenient to reorder or insert things into the list. Is there a way to get the grid to use more HTML style column/rows where the items are a child of the row they are in, so that I can re-order easily? Is there some other control that will let me layout a form easily?

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  • How can I decode UTF-16 data in Perl when I don't know the byte order?

    - by Geo
    If I open a file ( and specify an encoding directly ) : open(my $file,"<:encoding(UTF-16)","some.file") || die "error $!\n"; while(<$file>) { print "$_\n"; } close($file); I can read the file contents nicely. However, if I do: use Encode; open(my $file,"some.file") || die "error $!\n"; while(<$file>) { print decode("UTF-16",$_); } close($file); I get the following error: UTF-16:Unrecognised BOM d at F:/Perl/lib/Encode.pm line 174 How can I make it work with decode?

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  • are fixtures loaded when using the sql dump to create a test database

    - by Josh Moore
    Because of some non standard table creation options I am forced to use the sql dump instead of the standard schema.rb (i.e. I have uncommented this line in the environment.rb config.active_record.schema_format = :sql). I have noticed that when I use the sql dump that my fixtures do not seem to be loaded into the database. Some data is loaded into it but, I am not sure where it is coming from. Is this normal? and if it is normal can anybody tell me where this other data is coming from?

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  • Ruby on Rails: What are Erubis' disadvantages and why isn't it packaged with Rails by default? How t

    - by williamjones
    I just discovered Erubis, a replacement for the default view renderer for Ruby on Rails. However, from what I can tell from reading about it, it's superior across the board. It is much faster. It has many more options. It can prevent cross site scripting without having to use h. Does this have any disadvantages versus the standard erb renderer? Why isn't this the standard renderer packaged with Rails? Also, the docs for Erubis say to install it just by installing the gem, and then add the following to environment.rb: require 'erubis/helpers/rails_helper' #Erubis::Helpers::RailsHelper.engine_class = Erubis::Eruby # or Erubis::FastEruby Reading the docs, FastEruby seems to be just a faster renderer than Eruby. Why wouldn't it be default and used by everyone? I'm highly interested in using the engine erubis::EscapedEruby which automatically calls h to escape html on fields from the database. Are there any gotchas I should be aware of or does this pretty much solve all cross site scripting?

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  • How can I decode UTF-16 data in Perl?

    - by Geo
    If I open a file ( and specify an encoding directly ) : open(my $file,"<:encoding(UTF-16)","some.file") || die "error $!\n"; while(<$file>) { print "$_\n"; } close($file); I can read the file contents nicely. However, if I do: use Encode; open(my $file,"some.file") || die "error $!\n"; while(<$file>) { print decode("UTF-16",$_); } close($file); I get the following error: UTF-16:Unrecognised BOM d at F:/Perl/lib/Encode.pm line 174 How can I make it work with decode?

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  • C++ Asymptotic Profiling

    - by Travis
    I have a performance issue where I suspect one standard C library function is taking too long and causing my entire system (suite of processes) to basically "hiccup". Sure enough if I comment out the library function call, the hiccup goes away. This prompted me to investigate what standard methods there are to prove this type of thing? What would be the best practice for testing a function to see if it causes an entire system to hang for a sec (causing other processes to be momentarily starved)? I would at least like to definitively correlate the function being called and the visible freeze. Thanks

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  • How do I prevent ConEmu auto-attaching to every single cmd.exe?

    - by naxa
    I don't want ConEmu to attach to every cmd I open, but this is how it works now. I remember that I told ConEmu to do this, but I don't want it anymore. Maybe I just overlooked something, but I've read all the settings pages and I couldn't find an option to disable it. Am I missing something? How do I prevent ConEmu from attaching every single cmd.exe I open? My ConEmu version is 121109 x86, on winXPproSp3x86.

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  • Scrollbars for Infinite Document?

    - by andyvn22
    Is there a standard Aqua way to handle a practically infinite document? For example, imagine a level editor for a tile-based game. The level has no preset size (though it's technically limited by NSInteger's size); tiles can be placed anywhere on the grid. Is there a standard interface for scrolling through such a document? I can't simply limit the scrolling to areas that already have tiles, because the user needs to be able to add tiles outside that boundary. Arbitrarily creating a level size, even if it's easily changeable by the user, doesn't seem ideal either. Has anyone seen an application that deals with this problem?

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  • match elements from two files, how to write the intended format to a new file

    - by user2489612
    I am trying to update my text file by matching the first column to another updated file's first column, after match it, it will update the old file. Here is my old file: Name Chr Pos ind1 in2 in3 ind4 foot 1 5 aa bb cc ford 3 9 bb cc 00 fake 3 13 dd ee ff fool 1 5 ee ff gg fork 1 3 ff gg ee Here is the new file: Name Chr Pos foot 1 5 fool 2 5 fork 2 6 ford 3 9 fake 3 13 The updated file will be like: Name Chr Pos ind1 in2 in3 ind4 foot 1 5 aa bb cc fool 2 5 ee ff gg fork 2 6 ff gg ee ford 3 9 bb cc 00 fake 3 13 dd ee ff Here is my code: #!/usr/bin/env python import sys inputfile_1 = sys.argv[1] inputfile_2 = sys.argv[2] outputfile = sys.argv[3] inputfile1 = open(inputfile_1, 'r') inputfile2 = open(inputfile_2, 'r') outputfile = open(outputfile, 'w') ind = inputfile1.readlines() cm = inputfile2.readlines()[1:] outputfile.write(ind[0]) #add header for i in ind: i = i.split() for j in cm: j = j.split() if j[0] == i[0]: outputfile.writelines(j[0:3] + i[3:]) inputfile1.close() inputfile2.close() outputfile.close() When I ran it, it returned a single column rather than the format i wanted, any suggestions? Thanks!

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  • How to exit vncconfig process properly

    - by Stan
    On CentOS 5.7, when open up a vncconfig, a tray icon shows on the taskbar. Hit close or the x button to close the vncconfig doesn't exit the vncconfig, the tray icon is still there. Next time, if I open up another vncconfig rather than clicking the one on taskbar. There will be another vncconfig tray icon added to the taskbar. Except using kill $pid to remove the tray icon, is there any other way to exit the vncconfig process properly? See screenshot below:

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