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• Step-by-step execution for Intel AT&T assembler?

  - by Søren Haagerup

  Hello everyone, I'm writing a compiler that converts source code (written in a small imperative programming language) to Intel AT&T 32-bit assembler. I tend to spend a lot of time debugging, because of nasty offset-mistakes etc. in the generated code, and I would like to know if anyone knows of a tool to "walk through" the generated assembler code step-by-step, visualizing what's on the stack etc. I use Ubuntu Linux as my development platform, and I'm comfortable with the terminal -- a GUI-program would be nice though. Does it exist? Or is there a good reason it doesn't (maybe the problem isn't so straightforward..?) If you have good ideas for approaching debugging tasks in assembly code, I'll be glad to hear from you!

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• Best ways to collaborate with small number of people

  - by Mark Szymanski

  Hi, I am collaborating with someone on a project and currently use Skype for collaboration. I like it because we can be on a call to say things that are hard to say by typing out. We can share our screens so we can help with code writing. And we can use the text chat to copy-paste code between each other. We also use Subversion for version control. I just wanted to know what other people used for collaborating with others so I could see whats out there to use. Thanks!

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• Best Fit Scheduling Algorithim

  - by Teegijee

  I'm writing a scheduling program with a difficult programming problem. There are several events, each with multiple meeting times. I need to find an arrangement of meeting times such that each schedule contains any given event exactly once, using one of each event's multiple meeting times. Obviously I could use brute force, but that's rarely the best solution. I'm guessing this is a relatively basic computer science problem, which I'll learn about once I am able to start taking computer science classes. In the meantime, I'd prefer any links where I could read up on this, or even just a name I could Google.

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• Using Connection Based State with Apache2

  I am writing an HTTPS based application using Apache2 as the web server, and python as the language (not sure which framework or Apache2 mod yet). After clients (which are not web browsers) first establish an HTTPS connection to the server, they are expected to send an authentication message. If authentication is successful, they are able to send more commands, until the connection is closed (HTTP 1.1 will be used, with a long keep alive time). My question is, is it possible to have state associated with the connection? I don't want the client to have to send cookies or session ids -- the HTTPS application should be able to figure out the session based on the connection that each request belongs to...the question is how?

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• How write an ads server

  - by Nisanio

  Hi everyone I want to write an ads server (like OpenX), just for fun and learning (they aren't the same). But my idea, more than writing an entire application with web interface and so on, is to write a very tiny core that provides the basic functionality in the most efficient way, like a library that other people can use to write a complete application more fitted to their needs. The objective is to make it small, very efficient and fast. Can someone help me with a list of the minimal functionality needed for this kind of application?. An Ads Server isn't only a banner delivery, there are differents methods (for example OpenX uses a very weird javascript code that i don't understand completely) Any help or guidance is more than welcome...Thanks

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• sql server 2008 express one row write problem

  - by bojanskr

  Hi everyone, I have the most bizarre problem(at least it is bizarre to me) with MSSQL Server Express 2008. The problem is the following: On the development machine I use MS SQL Server 2008 Enterprise....I get some data from a WCF service and write that data to the db (simple as it can be)....I should point out however that the writing, it is done in a separate thread. BUt, anyway no problems during development...all the data is there. Then I set everything up(connection strings .\SQLEXPRESS, other settings) build in Release and copy that to a test machine that has MS SQL Server Express installed(because my application is a client application and it should work with Express)...I run the program....the program retrieves the data from the service...and when I look at the database...I'm in for a big suprise...there's only one row written(the first row received from the WCF service). I would really appreciate any help...I'm in a deadlock here. Thanks in advance. Bojan

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• ruby 1.9: invalid byte sequence in UTF-8

  - by Marc Seeger

  I'm writing a crawler in ruby (1.9) that consumes lots of HTML from a lot of random sites. When trying to extract links, I decided to just use .scan(/href="(.*?)"/i) instead of nokogiri/hpricot (major speedup). The problem is that I now receive a lot of "invalid byte sequence in UTF-8" errors. From what I understood, the net/http library doesn't have any encoding specific options and the stuff that comes in is basically not properly tagged. What would be the best way to actually work with that incoming data? I tried .encode with the replace and invalid options set, but no success so far...

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• Asp.net MVC Label For

  - by Jaimal Chohan

  I have the following <label for="Forename">Forename</label> <%= Html.TextBoxFor(m => m.Customer.Name.Forename) %> the problem with this is that this is rendered as <label for="AddressLine1">Address Line 1</label> <input type="text" value="" name="Customer.Address.Thoroughfare" id="Customer_Address_Thoroughfare"> not what I want ofc. I would like an extension to render the label correctly (i.e. with the for="" attribute having the value of the input id), is there anything in MVC 2 that does this nativly before I go writing my own extension?

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• How can I run NUnit(Selenium Grid) tests in parallel?

  - by Benjamin Lee

  My current project uses NUnit for unit tests and to drive UATs written with Selenium. Developers normally run tests using ReSharper's test runner in VS.Net 2003 and our build box kicks them off via NAnt. We would like to run the UAT tests in parallel so that we can take advantage of Selenium Grid/RCs so that they will be able to run much faster. Does anyone have any thoughts on how this might be achieved? and/or best practices for testing Selenium tests against multiple browsers environments without writing duplicate tests automatically? Thank you.

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• Integrating Pentaho/Talend/etc. with an OR Mapper

  - by DaDaDom

  We have an application (Java) with an own OR mapper. Within this system we have what can be compared to Hibernate's interceptors (we call it triggers): Do specific actions just before saving data in the database, after it's deleted and so on. The underlying database is MySQL. Now we would like to use tools such as Pentaho Data Integration or Talend to convert data to put it into our system. It's no problem to do that directly on the SQL level, but by doing so we loose the built-in power of our triggers. Is there a way to somehow integrate any of the Data Integration solutions into our existing application? It would be great if there was a way to write into instances of our classes instead of writing into the database directly. Any hints welcome :-)

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• Socket Communication in C#- IP-Port

  - by Ahmet Altun

  I am testing my socket programs at home, in local network. Server and client programs are running on seperate machines. Server program socket is binded as: serverSocket.Bind(new IPEndPoint(IPAddress.Parse("127.0.0.1"), 8999)); Client program (on the other computer) is connected as: clientSocket.Connect(IPAddress.Parse("192.168.2.3"), 8999); Why can Client not communicate with server? Do I need to make some firewall configuration or something like that? Or am I writing Server Ip incorrectly to the Client? (I got it from cmd-ipconfig of server)

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• Accessing the Custom Object Return type from ojdbc6 JDBC Thin Drivers

  - by Andrew Harmel-Law

  I'm writing some JDBC code which calls a Oracle 11g PL/SQL procdedure which has a Custom Object return type. I can get the code to call the procedure, but how do I access the returned Custom Object to obtain it's contained values?. An example of my code calling the procedure is below: PLSQL Code: Procedure GetDataSummary (p_my_key IN KEYS.MY_KEY%TYPE, p_recordset OUT data_summary_tab, p_status OUT VARCHAR2); Java Code: String query = "begin manageroleviewdata.getdatasummary(?, ?, ?); end;"); CallableStatement stmt = conn.prepareCall(query); stmt.setInt(1, 83); stmt.registerOutParameter(2, OracleTypes.ARRAY, "DATA_SUMMARY_TAB"); stmt.registerOutParameter(3, OracleTypes.VARCHAR); stmt.execute(stmt); How do I get the result back fron this?

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• GC.AddMemoryPressure in C#

  - by ssheldon

  I am writing an application in C# that makes use of a 3rd party COM DLL, this dll creates a lot of resources (like bitmaps, video, data structures) in unmanaged memory. While digging around I came across the following call for the Garbage Collector: GC.AddMemoryPressure(long long bytesAllocated) It is documented in MSDN here: http://msdn.microsoft.com/en-us/library/system.gc.addmemorypressure.aspx This sounds like something I should be calling since this external dll is createing a lot of resources the CLR is unaware of. I guess I have two questions... How do I know how much memory pressure to add when the dll is 3rd party and it's not possible for me to know exactly how much memory this dll is allocating. How important is it to do this?

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• "cannot concatenate 'str' and 'list' objects" keeps coming up :(

  - by ratce003

  I'm writing a python program and passing in a html template but an error keeps coming up, "cannot concatenate 'str' and 'list' objects" here is is the program: #!/usr/bin/env python # -*- coding: UTF-8 -*- # enable debugging import cgi import cgitb cgitb.enable() def template(file, **vars): return open(file, 'r').read() % vars print "Content-type: text/html\n" print form = cgi.FieldStorage() # instantiate only once! num_1 = form.getfirst('num_1') num_2 = form.getfirst('num_2') int1r = str(num_1) int2r = str(num_2) def calc_range(int2r, int1r): start = range(int2r, int1r + 1) end = range(1, int2r) return start+end int1 = int(int1r) int2 = int(int2r) out_str = '' for i in range(0, int1): first_line_num = (int2 + i) % int1 if first_line_num == 0: first_line_num = int1 line = calc_range(first_line_num, int1) out_str += line print template('results.html', output=out_str, title="Latin Squares")

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• Accessing a master page from httphandler

  - by vondip

  Hi All, I am developing a small application in asp.net (writing in c#). In my application I am using jquery to perform asynchronous call to the server. I have an http handler that listens in to the requests and does what it needs to do. Problems start when in the handler I need to access information stored in the page , from where the asynchronous call started. When I try this: Page page = HttpContext.Current.Handler as Page; I don't get a page. How else can I access the page itself? Thank you

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• Does a multithreaded crawler in Python really speed things up?

  - by beagleguy

  Was looking to write a little web crawler in python. I was starting to investigate writing it as a multithreaded script, one pool of threads downloading and one pool processing results. Due to the GIL would it actually do simultaneous downloading? How does the GIL affect a web crawler? Would each thread pick some data off the socket, then move on to the next thread, let it pick some data off the socket, etc..? Basically I'm asking is doing a multi-threaded crawler in python really going to buy me much performance vs single threaded? thanks!

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• FileNotFound Exception when using TestDriven.NET and NUnit

  - by Quang Anh

  I'm Writing a simple pong game in C# and XNA 4.0 to learn unit testing. The tools used are TestDriven.NET and NUnit, all newest versions. The problem is, if I test the code with VS2010 internal debugger, everything runs fine, but when I use "Run Test(s)" from menu, the application chokes with error: Test 'WindowsGame1.Game1.TestGameMenu' failed: Microsoft.Xna.Framework.Content.ContentLoadException : Error loading "SpaceBackground". File not found. ----> System.IO.FileNotFoundException : Error loading "Content\SpaceBackground.xnb". File not found. (some more below...) So it stops when the first textre is going to be loaded. What's going on? If you want to check the code out, download it here http://www.mediafire.com/?qwnkmyqheum

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• How to check a local wifi connection

  - by Thomas Joos

  hi all, I'm writing an app which connects to a static ip adress in a local network. How can I check if I have a local network connection? I want to connect to http://192.168.2.5 and i tried using the Rechability class but it returns FALSE, while the device is definately connected ( when i don't do the check, the app works fine so there is a connection ): Reachability *r = [Reachability reachabilityWithHostName:@"http://192.168.2.5"]; NetworkStatus internetStatus = [r currentReachabilityStatus]; How should work this out? Thomas

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• NSRangeException Issue

  - by Garry

  Hi, I am writing a Core Data-based iPhone app and I am new to Objective-C. I have a bug that I am really struggling to nail. The iPhone simulator keeps crashing with the following error message: 2010-03-21 17:37:40.583 Patients[3689:207] * Terminating app due to uncaught exception 'NSRangeException', reason: '* -[NSCFArray insertObject:atIndex:]: index (1) beyond bounds (1)' 2010-03-21 17:37:40.585 Patients[3689:207] Stack: ( 31007835, 2516698377, 31091771, 31091610, 601273, 197333, 3194546, 3141378, 25020, 29768673, 214570, 30740485, 204512, 29114749, 29505379, 29001194, 29252410, 29190487, 30794322, 30791263, 30788680, 39097877, 39098074, 2883503, 9912, 9766 ) This error happens when I press return on a textField. What happens when the return key is pressed is that an attribute on an entity is updated. I don't know what array is out of bounds as I am not using any arrays in my code! Is there any way of getting more detail as to where in my code the error is?? Thanks,

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• Cakephp doesn't write a cookie

  - by radious

  Hello! I have a problem with writing cookies in cakephp and even don't know how to debug it or where too look for a clue. I've inherited a project where cookie were only created using the Session component, of course i added 'Cookie' to $components array in app_controller and put this in beforeFilter: $this->Cookie->name = 'foo'; $this->Cookie->path = '/home/~nick'; $this->Cookie->domain = 'hostname'; $this->Cookie->secure = false; //i.e. only sent if using secure HTTPS $this->Cookie->key = 'some key'; and in some action i use: $this->Cookie->write('key', 'value'); I access page by http://hostname/home/~nick/foo and actually try to put even something so silly. I doesn't work. I would be really gratefully for any clue where to search problem. Thanks!

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• how to write re-usable views in django?

  - by rz

  These are the techniques that I use regularly to make my views reusable: take the template_name as an argument with a default take an optional extra_context which defaults to empty {} right before the template is rendered the context is updated with the extra_context for further re-usability, call any callable in extra_context.values() whenever the view deals with a queryset, there is a queryset argument with a default whenever the view needs a particular object from the ORM, it attempts to fetch it using any "id" parameter in several ways (e.g. as a slug, as a database id) (this may be a bad practice...) First, Should I add anything to my list? Should I remove anything from my list? The items accommodates a large number of cases. However, whenever an app extends a model of another in some way (e.g. adding a field or changing the behavior in some way) I end up writing my own views and only reusing the model. Is this normal?

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• Visual studio editor issue

  - by viky

  I am using Visual Studio 2008. In my editor whenever I write an automatic property it's "get" and "set" wraps to a single line whenever I wrote "set" and put semicolon(;). like this: public string MyProperty { get; set; } I want it to be formatted like this public string MyProperty { get; set; } Currently I am manually formatting it to this after writing it. How can I set it as a default format?

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• Python Core Library and PEP8

  - by Szymon Guz

  I was trying to understand why Python is said to be a beautiful language. I was directed to the beauty of PEP 8... and it was strange. In fact it says that you can use any convention you want, just be consistent... and suddenly I found some strange things in the core library: request() getresponse() set_debuglevel() endheaders() http://docs.python.org/py3k/library/http.client.html The below functions are new in the Python 3.1. What part of PEP 8 convention is used here? popitem() move_to_end() http://docs.python.org/py3k/library/collections.html So my question is: is PEP 8 used in the core library, or not? Why is it like that? Is there the same situation as in PHP where I cannot just remember the name of the function because there are possible all ways of writing the name? Why PEP 8 is not used in the core library even for the new functions?

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• problem with adding tool bar to UITableView

  - by chnet

  I'm writing a Navigation-Based iPhone app, and I'd like to have a UIToolBar docked at the bottom of my screen, with a UITableView scrolling between the tool bar and the navigation bar. I used [[self navigationController] setToolbarHidden:NO] and - (void)setToolbarItems:(NSArray *)toolbarItems animated:(BOOL)animated to set the UIToolBar. UIToolBar correctly shows in current view. If I drill down into a detail view using the button on navigation bar, i cannot return back to previous view. Before I add the tool bar, it can return back. I am wondering is there anything else should be noted when use UIToolbar?

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• Piping SoX in Python - subprocess alternative?

  - by Cochise Ruhulessin

  I use SoX in an application. The application uses it to apply various operations on audiofiles, such as trimming. This works fine: from subprocess import Popen, PIPE kwargs = {'stdin': PIPE, 'stdout': PIPE, 'stderr': PIPE} pipe = Popen(['sox','-t','mp3','-', 'test.mp3','trim','0','15'], **kwargs) output, errors = pipe.communicate(input=open('test.mp3','rb').read()) if errors: raise RuntimeError(errors) This will cause problems on large files hower, since read() loads the complete file to memory; which is slow and may cause the pipes' buffer to overflow. A workaround exists: from subprocess import Popen, PIPE import tempfile import uuid import shutil import os kwargs = {'stdin': PIPE, 'stdout': PIPE, 'stderr': PIPE} tmp = os.path.join(tempfile.gettempdir(), uuid.uuid1().hex + '.mp3') pipe = Popen(['sox','test.mp3', tmp,'trim','0','15'], **kwargs) output, errors = pipe.communicate() if errors: raise RuntimeError(errors) shutil.copy2(tmp, 'test.mp3') os.remove(tmp) So the question stands as follows: Are there any alternatives to this approach, aside from writing a Python extension to the Sox C API?

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