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• summer experiment: GWT & python for a trading game- arch question

  - by sadhu_

  Hi, As a summer learning experiment, I'm thinking of coding up a web front end for a trading game i wrote in python, that generates share prices and random snippets of text. I am sort of struggling with how this should work on the back-end though. I'd rather have my GWT client page interact with the python share price generator, than to try and re-code it in java. I suppose i could use an sqlite db, and then use jdbc to pick up the prices, but i was wondering if there is a better way, for me to be able to poll some python script either from my client page, or from the serverside java code ? I found this python wrapper, but i'm not sure how i could use it though: http://code.google.com/apis/visualization/documentation/dev/gviz_api_lib.html Thanks.

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• Python urllib3 and how to handle cookie support?

  - by bigredbob

  So I'm looking into urllib3 because it has connection pooling and is thread safe (so performance is better, especially for crawling), but the documentation is... minimal to say the least. urllib2 has build_opener so something like: #!/usr/bin/python import cookielib, urllib2 cj = cookielib.CookieJar() opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj)) r = opener.open("http://example.com/") But urllib3 has no build_opener method, so the only way I have figured out so far is to manually put it in the header: #!/usr/bin/python import urllib3 http_pool = urllib3.connection_from_url("http://example.com") myheaders = {'Cookie':'some cookie data'} r = http_pool.get_url("http://example.org/", headers=myheaders) But I am hoping there is a better way and that one of you can tell me what it is. Also can someone tag this with "urllib3" please.

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• How do I get the server hostname from a mounted directory with cocoa/obj-c?

  - by Andrew

  Currently when I open a file with my program I can select files on a server by clicking on the server name in the sidebar in an NSOpenPanel and then selecting the file. No problem, this works fine for using the file as long as the shared directory is mounted. I get a path like "/Volumes/SHARENAME/filename.bla". My question is how do I get the server hostname of the computer it came from. For instance, if I clicked on the device with name SERVERNAME under "Shared" in the NSOpenPanel how do I get SERVERNAME from "/Volumes/SHARENAME/filename.bla". I have looked at quite a bit of documentation and have been unable to find a solution for this problem. Any help toward this will be greatly appreciated. Thank you.

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• 8051 microcontroller kit recommendation?

  - by LucidDefender

  I'm a first year Computer Science student looking to get started with development for micro-controllers. I'd like to use the 8051, as it's common as dirt, and is used frequently in the real world. During my junior or senior year, I'll be taking a PIC micro-controller based embedded design class, so I'd rather not do PIC now; otherwise, I'll be fairly bored during that course. Most commercial kits I see are for the AVR or PIC series of microprocessors. I'm just looking for something with decent development tools, documentation, and enough add-ons to keep my novice self occupied for the summer. Any recommendations for an 8051 family kit? Thanks!

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• How do I politely tell a colleague to RTFM?

  - by Jason Baker

  I think by now, I've transitioned from a junior developer to an "intermediate" developer. Previously, whenever someone would ask me a question, I'd gleefully answer them simply because I was happy to be of use to someone and wanted to prove my worth as a developer. Now it's gotten to the point where I can't get work done because I'm constantly answering questions that can be answered just by spending a few seconds looking at documentation or searching google (sometimes from developers more senior than I). On one hand, I genuinely want to help them out and enjoy teaching other people. However, I just don't have enough bandwidth to keep answering these kinds of questions. How do I handle this kind of thing politely?

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• Codeigniter multi language url

  - by Thang Bui

  Please help me. I search 2 hours but do not see any solutions for my case. My customer request me the multi language but they want the link as: http://site.com/controller_name/lang_code Or http://site.com/controller_name/paramenter1/parameter2/lang_code The language code is always at the last segment. It is stored in the session. The url maybe also http://site.com/controller_name/ Or http://site.com/controller_name/paramenter1/parameter2/ In this case. The language stored in session will be loaded, but the url don't need to display it. I try i18n library, but it cannnot solve my problem. Can anyone help me

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• webradio opensource

  - by stomerfull

  hello, i'm looking for an open source web radio site like http://clip-bucket.com/ that is webtv if anyone know one thank you very much for your help

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• Using EXR images in OpenCV

  - by Nestor

  Hi there! I'm currently working on a project with OpenEXR and I would like to implement some Blob detection algorithms. To do this I figured that I could use OpenCV as it says in the documentation that it can open OpenEXR format files. I have all the libraries installed and working as I've been doing other things. I open a simple jpg file with openCV cvLoadImage. It works fine. But when i try to open any .exr file it doesn't seam to like it. I get a gray window where there should be the image display. Has anyone done any tests with OpenCV and OpenEXR libraries working together? Have they worked for you? What do you think? Thanks.

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• EOF of excel in vb6

  - by Mark

  how do i write the code in vb6 in finding the EOF of excel file can anyone help me? i try to code this and it works.. --- Dim excelApp as Excel.Application Dim excelWB as Excel.Workbook Set excelApp = New Excel.Application Set excelWB = excelApp.Workbooks.Open("D:\Book1.xls") Dim xlsRow as Long Dim EOF as Boolean xlsRow = 1 Do While (EOF = False) If (excelWB.Sheets("Sheet1").Cells(xlsRow, 1).Value = "") Then EOF = True Else xlsRow = xlsRow + 1 End If Loop <--- this code is working, but the only problem is only the column 1 will be checked and the others is not. Can anyone help me on how to improve this code to check all rows and column of excel cells.

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• IO completion port key confusion

  - by Richard Tew

  I'm writing an IO completion port based server (source code here) using the Windows DLL API in Python using the ctypes module. But this is a pretty direct usage of the API and this question is directed at those who have a knowledge of IOCP, not Python. As I understand the documentation for CreateIoCompletionPort, you specify your "user defined" completion key when you call this function with a file handle (in my case a socket) you are associating with the created IOCP. When you get around to calling GetQueuedCompletionStatus, you get a completion key value along with a pointer to an overlapped object. The completion key should identify what overlapped object and request has completed. However, let's say I pass in 100 as the completion key in my CreateIoCompletionPort call with an overlapped object. When the same overlapped object has its IO completed and it arrives back through GetQueuedCompletionStatus, the completion key that accompanies it is much larger and bares no resemblance to the original value of 100. Am I misunderstanding how the completion key works, or must I be doing it wrong in the source code I linked above?

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• MySQL locking problem

  - by teehoo

  I have a simple setup of a set of writers and a set of readers working with a MySQL ISAM table. The writers are only inserting rows while the readers are only checking for new rows. OK, so I know that I don't need a lock in this situation, since I'm not modifying existing rows. However my Writers are accessing one more table that does need a lock. I piece of information seems irrelevant except for the following limitation stated in the MySQL documentation: A session that requires locks must acquire all the locks that it needs in a single LOCK TABLES statement. While the locks thus obtained are held, the session can access only the locked tables. For example, in the following sequence of statements, an error occurs for the attempt to access t2 because it was not locked in the LOCK TABLES statement: So to access the table I want to insert rows into, I NEED to lock it, which is causing me performance problems. Any suggestions of how to get around this?

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• An agenda in Korn Shell: New / Edit / Delete / View appointment

  - by Abaco

  As stated in the title, I have to write a simple script which should perform some typical agenda's functions. The script must use crontab. The functions are: Creating a new appointment Edit an existent appointment Delete an appointment List the appointment I really don't have a clue how to do this, can you help me with some hint? Maybe a bit of sweet code? Thank you very much, Abaco EDIT: To be more specific on my question Point 1: how can I edit a crontab thorugh ksh? How can I insert a new line? Can you link me some documentation or a bit of code about this?

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• C# System.Diagnostics.Debugger.Debug() stopped working

  - by Andrew Miner

  I'm working on a program which uses the System.Diagnostics.Debugger.Break() method to allow the user to set a breakpoint from the command-line. This has worked fine for many weeks now. However, when I was working on fixing a unit test today, I tried to use the debug switch from the command-line, and it didn't work. Here's what I've tried: I've confirmed that the Debug() method is really being called (by putting a System.Console.WriteLine() after it) I've confirmed that the build is still in Debug I've done a clean build I've restarted Product Studio A quick Google search didn't reveal anything, and the API documentation for .Net doesn't mention anything about this function not performing correctly. So... any ideas?

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• How to show a video stored on server on iphone

  - by Amitkumar

  Hi, I have a query regarding showing a video (which is stored on server) on iPhone. I want show a video in an iPhone Application. This is not live streaming. So how the video can be shown? I have read the Apple's documentation for HTTP streaming of video. Do I need to call a Web Service? Is there any tutorial for this? Thanks in advance..

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• How to upload excel files to database using linq?

  - by Krishnan

  My team working in asp.net projects Here we have to upload Excel contents to Database We are using linq Please help to do the same

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• How can I make Vim autosave files when it loses focus?

  - by Peeja

  I'm used to my editors autosaving files when they lose focus. I recently switched to MacVim, and I can't recreate that behavior. I tried this: autocmd BufLeave,FocusLost * wall but if a buffer is unnamed when the window or MacVim loses focus, I get an error like the following: Error detected while processing BufLeave Auto commands for "*": E141: No file name for buffer 1 I'm confused, because :wall's documentation says: Write all changed buffers. Buffers without a file name or which are readonly are not written. so I'd expect it to skip unnamed buffers. Is there a better way to do this?

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• Customizing UISlider look

  - by tcurdt

  To customize the visual look of a UISlider you can set the thumb and track images. Part of the track images gets stretched to the appropriate with. From the documentation: A stretchable region sits between two end cap regions. The end caps define the portions of the image that remain as is and are not stretched. The stretchable region is a 1-point wide area between the end caps that can be replicated to make the image appear longer. Now the problem I have is that my stretchable region needs to be more than 1-point wide. (It's a pattern) Unfortunately the 1-point width seems to be hard coded in the SDK. Anyone having an idea how to work around this? Or will I have to write my own slider from scratch for this?

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• Perl, treat string as binary byte array

  - by Mike

  In Perl, is it appropriate to use a string as a byte array containing 8-bit data? All the documentation I can find on this subject focuses on 7-bit strings. For instance, if I read some data from a binary file into $data my $data; open FILE, "<", $filepath; binmode FILE; read FILE $data 1024; and I want to get the first byte out, is substr($data,1,1) appropriate? (again, assuming it is 8-bit data) I come from a mostly C background, and I am used to passing a char pointer to a read() function. My problem might be that I don't understand what the underlying representation of a string is in Perl.

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• Is it possible to parse a stylesheet with Nokogiri?

  - by wbharding

  I've spent my requisite two hours Googling this, and I can not find any good answers, so let's see if humans can beat Google computers. I want to parse a stylesheet in Ruby so that I can apply those styles to elements in my document (to make the styles inlined). So, I want to take something like <style> .mystyle { color:white; } </style> And be able to extract it into a Nokogiri object of some sort. The Nokogiri class "CSS::Parser" (http://nokogiri.rubyforge.org/nokogiri/Nokogiri/CSS/Parser.html) certainly has a promising name, but I can't find any documentation on what it is or how it works, so I have no idea if it can do what I'm after here. My end goal is to be able to write code something like: a_web_page = Nokogiri::HTML(html_page_as_string) parsed_styles = Nokogiri::CSS.parse(html_page_as_string) parsed_styles.each do |style| existing_inlined_style = a_web_page.css(style.declaration) || '' a_web_page.css(style.declaration)['css'] = existing_inlined_style + style.definition end Which would extract styles from a stylesheet and add them all as inlined styles to my document.

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• Custom login in Django

  - by alpgs

  Django newbie here. I wrote simplified login form which takes email and password. It works great if both email and password are supplied, but if either is missing i get KeyError exception. According to django documentation this should never happen: By default, each Field class assumes the value is required, so if you pass an empty value -- either None or the empty string ("") -- then clean() will raise a ValidationError exception I tried to write my own validators for fields (clean_email and clean_password), but it doesn't work (ie I get KeyError exception). What am I doing wrong? class LoginForm(forms.Form): email = forms.EmailField(label=_(u'Your email')) password = forms.CharField(widget=forms.PasswordInput, label=_(u'Password')) def clean_email(self): data = self.cleaned_data['email'] if not data: raise forms.ValidationError(_("Please enter email")) return data def clean_password(self): data = self.cleaned_data['password'] if not data: raise forms.ValidationError(_("Please enter your password")) return data def clean(self): try: username = User.objects.get(email__iexact=self.cleaned_data['email']).username except User.DoesNotExist: raise forms.ValidationError(_("No such email registered")) password = self.cleaned_data['password'] self.user = auth.authenticate(username=username, password=password) if self.user is None or not self.user.is_active: raise forms.ValidationError(_("Email or password is incorrect")) return self.cleaned_data

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• Soundcload API, PHP, and OAuth

  - by fedeisas

  Hi guys. I'm building a site, and I need to query my last two tracks from my soundcloud account and display them on my page. I've read the Soundcloud API documentation but it seems obscure and far from my reach. I've installed the PHP library for using the API and Oauth, and set up my SoundCloud application to get my Consumer Keys, but I can't start the OAuth session. I'm using this library. I was wondering if maybe you could hand me some sample code for doing this. That would be great!!

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• Is there a way to find out if an iPhone / iPad app is installed already?

  - by eerok512

  I'm writing a freeware version of an app and would like to check if a user already has the unfree version installed, and print a message whose contents are conditional on the results of the installation check... anybody know if this is possible? the closest I've come to a solution is to make use of the CFPreferencesSetValue API with a kCFPreferencesAnyUser / kCFPreferencesCurrentHost pairing... I haven't tried it, but based on the documentation it sounds possible. however in my current specific situation this API will not be able to solve my problem, because I want to check for the presence of an app I wrote 4 months ago that didn't write any data to the CFPrefs registry... because back then I didn't know of it nor did I foresee this situation arising... the only way CFPrefs can assist me is in future apps now that I know it exists :) so I'm wondering if there are other ways to do it? any help will be appreciated :)

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• How to set parameters in Python zlib module

  - by fagricipni

  I want to write a Python program that makes PNG files. My big problem is with generating the CRC and the data in the IDAT chunk. Python 2.6.4 does have a zlib module, but there are extra settings needed. The PNG specification REQUIRES the IDAT data to be compressed with zlib's deflate method with a window size of 32768 bytes, but I can't find how to set those parameters in the Python zlib module. As for the CRC for each chunk, the zlib module documentation indicates that it contains a CRC function. I believe that calling that CRC function as crc32(data,-1) will generate the CRC that I need, though if necessary I can translate the C code given in the PNG specification. Note that I can generate the rest of the PNG file and the data that is to be compressed for the IDAT chunk, I just don't know how to properly compress the image data for the IDAT chunk after implementing the initial filtering step.

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• how do i connect to MSSQL 2008 database in JAVA with jbbc

  - by shuxer

  Hello I have MSSQL 2008 installed on my local PC, and my java application needs to connect to a mssql database. I am a new to MSSQL and i would like get some help on creating user login for my java application and getting connection via jdbc. So far i tried to create a user login for my app and used following connection string, but i doest work at all. Any help and hint will be appreciated. jdbc:jtds:sqlserver://127.0.0.1:1433/dotcms username="shuxer" password="itarator" Thanks in advance.

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• Most flexible minimizer/compressor for ASP.NET MVC 2?

  - by AlexanderN

  From your experience, what's the most flexible minimizer/compressor (JS+CSS) for ASP.NET MVC you've dealt with? So far mbcompress doesn't seem to be too MVC friendly weboptimizer.codeplex.com lacks documentation clientdependency.codeplex.com is still in beta compress2 seems like a good candidate, but haven't tried it yet mvcscriptmanager only combines and compresses javascript but not CSS By flexible I mean Choose what should be compressed, minified, and combined Add exceptions. E.g. if debug don't compress XYZ.JS or don't minify ABC.CSS Caching In the end, it should help offer the best YSLOW score. If you know of any other assemblies out there, please list them also.

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