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  • cache-coherence MOESI protocol

    - by Yaron
    processor A owns a cache line which is shared with processor B. what happens when B tries to write to that line? also, if it was 'invalid' instead of 'shared' would it make any difference? thank you.

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  • NILL value in haskell

    - by snorlaks
    Hello, I get input (x) from user, convert it to Int by let y = (read x)::Int and then I would like the function to behave in a special way if user gave nothing (empty string). -- In this place I would like to handle situation in which user -- gave empty string as argument -- this doesnt work :/ yearFilter [] y = True --This works fine as far as y is integer yearFilter x y | x == (objectYear y) = True | otherwise = False Thanks for help, Bye

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  • ROR heroku PostGres issue

    - by oelbrenner
    getting error: ActiveRecord::StatementInvalid (PGError: ERROR: argument of HAVING must be type boolean, not type timestamp without time zone controller code snippet: def inactive @number_days = params[:days].to_i || 90 @clients = Client.find(:all, :include = :appointments, :conditions = ["clients.user_id = ? AND appointments.start_time <= ?", current_user.id, @number_days.days.ago], :group = 'client_id', :having = 'MAX(appointments.start_time)' ) end

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  • ASP.NET FaceBook App Development -

    - by leen3o
    I have downloaded both samples for the Facebook Developer Kit from Codeplex and Facebook.NET followed both tutorials down to the word - But as soon as I browse to me app on Facebook I am getting the following error for BOTH versions? API Error Code: 100 API Error Description: Invalid parameter Error Message: Requires valid next URL. Anyone else had this problem? I'm struggling to find an answer to what the error actually means? Especially as the starts kits are supposed to work out the box?

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  • HttpPost request unsuccessful

    - by The Thom
    I have written a web service and am now writing a tester to perform integration testing from the outside. I am writing my tester using apache httpclient 4.3. Based on the code here: http://hc.apache.org/httpcomponents-client-4.3.x/quickstart.html and here: http://hc.apache.org/httpcomponents-client-4.3.x/tutorial/html/fundamentals.html#d5e186 I have written the following code. Map<String, String> parms = new HashMap<>(); parms.put(AirController.KEY_VALUE, json); postUrl(SERVLET, parms); ... protected String postUrl(String servletName, Map<String, String> parms) throws AirException{ String url = rootUrl + servletName; HttpPost post = new HttpPost(url); List<NameValuePair> nvps = new ArrayList<NameValuePair>(); for(Map.Entry<String, String> entry:parms.entrySet()){ BasicNameValuePair parm = new BasicNameValuePair(entry.getKey(), entry.getValue()); nvps.add(parm); } try { post.setEntity(new UrlEncodedFormEntity(nvps)); } catch (UnsupportedEncodingException use) { String msg = "Invalid parameters:" + parms; throw new AirException(msg, use); } CloseableHttpResponse response; try { response = httpclient.execute(post); } catch (IOException ioe) { throw new AirException(ioe); } String result; if(HttpStatus.SC_OK == response.getStatusLine().getStatusCode()){ result = processResponse(response); } else{ String msg = MessageFormat.format("Invalid status code {0} received from query {1}.", new Object[]{response.getStatusLine().getStatusCode(), url}); throw new AirException(msg); } return result; } This code successfully reaches my servlet. In my servlet, I have (using Spring's AbstractController): protected ModelAndView post(HttpServletRequest request, HttpServletResponse response) { String json = String.valueOf(request.getParameter(KEY_VALUE)); if(json.equals("null")){ log.info("Received null value."); response.setStatus(406); return null; } And this code always falls into the null parameter code and returns a 406. I'm sure I'm missing something simple, but can't see what it is.

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  • Using the LIMIT statement in a SQLite query

    - by anselmophil
    Hi guys. I have a query that selects rows in a ListView without having a limit. But now that i have implemented a SharedPreferences that the user can select how much rows will be displayed in the ListView, my SQLite query doesnt work. Im passing the argument this way: return wDb.query(TABELANOME, new String[] {IDTIT, TAREFATIT, SUMARIOTIT}, CONCLUIDOTIT + "=1", null, null, null, null, "LIMIT='" + limite + "'"); Help, please!

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  • build errors with Crypto++ on iphone

    - by Joey
    I am trying to build Crypto++ for iPhone but encountering issues. I managed to get it to build to the device by removing a few .asm files and test.cpp but two issues: 1) the simulator gets build errors relating to: {standard input}:13583:suffix or operands invalid for `call' 2) there are hundreds of warnings (kind of annoying) Has anyone gotten crypto++ to work on iphone and found a way to resolve these issues?

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  • Error while using csrf

    - by iHeartDucks
    This is my view function @csrf_request def view_function(request, template_name): c = {} return return render_to_response(template_name, {'recipe' : objRecipeForm}, c, context_instance=RequestContext(request)) I also used a {% csrf_token %} in my template The error I get is render_to_string() got multiple values for keyword argument 'context_instance' I am kinda new with django so any help is appreciated.

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  • In Ruby, how does coerce() actually work?

    - by Jian Lin
    It is said that when we have a class Point and knows how to perform point * 3 like the following: class Point def initialize(x,y) @x, @y = x, y end def *(c) Point.new(@x * c, @y * c) end end point = Point.new(1,2) p point p point * 3 Output: #<Point:0x336094 @x=1, @y=2> #<Point:0x335fa4 @x=3, @y=6> but then, 3 * point is not understood: Point can't be coerced into Fixnum (TypeError) So we need to further define an instance method coerce: class Point def coerce(something) [self, something] end end p 3 * point Output: #<Point:0x3c45a88 @x=3, @y=6> So it is said that 3 * point is the same as 3.*(point) that is, the instance method * takes an argument point and invoke on the object 3. Now, since this method * doesn't know how to multiply a point, so point.coerce(3) will be called, and get back an array: [point, 3] and then * is once again applied to it, is that true? point * 3 which is the same as point.*(3) and now, this is understood and we now have a new Point object, as performed by the instance method * of the Point class. The question is: 1) who invokes point.coerce(3) ? Is it Ruby automatically, or is it some code inside of * method of Fixnum by catching an exception? Or is it by case statement that when it doesn't know one of the known types, then call coerce? 2) Does coerce always need to return an array of 2 elements? Can it be no array? Or can it be an array of 3 elements? 3) And is the rule that, the original operator (or method) * will then be invoked on element 0, with the argument of element 1? (element 0 and element 1 are the two elements in that array returned by coerce) Who does it? Is it done by Ruby or is it done by code in Fixnum? If it is done by code in Fixnum, then it is a "convention" that everybody follows when doing a coerce? So could it be the code in * of Fixnum do something like this: if (something.typeof? ...) else if ... # other type else if ... # other type else # if it is not a type I know array = something.coerce(self) return array[0].*(array[1]) end

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  • So what if custom HTML attributes aren't valid XHTML?

    - by Constantine
    I know that is the reason some people don't approve of them, but does it really matter? I think that the power that they provide, in interacting with JavaScript and storing and sending information from and to the server, outweighs the validation concern. Am I missing something? What are the ramifications of "invalid" HTML? And wouldn't a custom DTD resolve them anyway?

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  • Pay pal direct method

    - by savitha
    hi, I am using paypal direct method. error is This transaction cannot be processed due to an invalid merchant configuration. How to accept or activate billing agreement while i am using sandbox account.

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  • MIME/IMF error codes?

    - by hack.augusto
    I need to write php code to identify common e-mail errors, like "inbox full" or specially "invalid email name" from email messages, because we need to clear our databases from nonexistent emails. I'm looking the MIME and IMF formats but I didn't find any kind of standard error code, does it exist?

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  • Input/ Output alternatives for printf/scanf

    - by Nitish
    It may sound strange that knowing a lot about ios and haing some experience in .net, I am a newcomer to C. Somewhere I got this target to find average of n numbers without using printf and scanf. I don't want the code for the program but it will be really helpful if someone can help me with the alternatives to the mentioned functions. Please let me know if code with printf/scanf is required here. Also do let me know if my query stands invalid. Thanks and Regards, Nitish

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  • untar from run command in fibre

    - by Shah.Bhavesh
    i want to untar file from source to destination with below statement `def untar(source,destination): run("tar -xf {0} {1}".format(source,destination)) ` i am getting Error C:\Users\test\Desktop\fabric>fab -H user@host-p pass untar:source =/shared/sample.tar,destination=/home/ Traceback (most recent call last): File "C:\Users\shasmukh\AppData\Roaming\Python\Python27\site-packages\fabric\m ain.py", line 630, in main docstring, callables, default = load_fabfile(fabfile) File "C:\Users\shasmukh\AppData\Roaming\Python\Python27\site-packages\fabric\m ain.py", line 163, in load_fabfile imported = importer(os.path.splitext(fabfile)[0]) File "C:\Users\shasmukh\Desktop\fabric\fabfile.py", line 11 def copy(source,destination) ^ SyntaxError: invalid syntax

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  • Facebook Graph API authorization problem

    - by kujawk
    If I load the following URL in Firefox and login to Facebook, I'm getting a page displaying "An invalid next or cancel parameter was specified." https://graph.facebook.com/oauth/authorize?client_id=c8caf78d724d142ee82334131ef5c9ce&redirect_uri=http://www.facebook.com/connect/login_success.html&type=user_agent&display=touch&scope=offline_access,publish_stream But if I change the display parameter to display=page I no longer get this error. Any ideas as to why?

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