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  • Can .NET Task instances go out of scope during run?

    - by Henry Jackson
    If I have the following block of code in a method (using .NET 4 and the Task Parallel Library): var task = new Task(() => DoSomethingLongRunning()); task.Start(); and the method returns, will that task go out of scope and be garbage collected, or will it run to completion? I haven't noticed any issues with GCing, but want to make sure I'm not setting myself up for a race condition with the GC.

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  • Thread loses Message after wait() and notify()

    - by fugu2.0
    Hey Guys! I have a problem handling messages in a Thread. My run-method looks like this public void run() { Looper.prepareLooper(); parserHandler = new Handler { public void handleMessage(Message msg) { Log.i("","id from message: "+msg.getData.getString("id")); // handle message this.wait(); } } } I have several Activities sending messages to this thread, like this: Message parserMessage = new Message(); Bundle data = new Bundle(); data.putString("id", realId); data.putString("callingClass", "CategoryList"); parserMessage.setData(data); parserMessage.what = PARSE_CATEGORIES_OR_PRODUCTS; parserHandler = parser.getParserHandler(); synchronized (parserHandler) { parserHandler.notify(); Log.i("","message ID: " + parserMessage.getData().getString("id")); } parserHandler.sendMessage(parserMessage); The problem is that the run-method logs "id from message: null" though "message ID" has a value in the Log-statement. Why does the message "lose" it's data when being send to the thread? Has it something to do with the notify? Thanks for your help

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  • dynamic xpath expression

    - by Ferol
    Good day, colleagues! Tell me please, how to make a dynamic xpath-parsing: for example, instead of writing $domXPath-query('//[(@id = "article-id-18")]'); - write something like that $domXPath-query('//[(@id = "article-id-*")]');, because in my case, the site's script generate (every time) a new id for block, that contains article's text? So question, is above.

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  • pdfSharp moving items on page

    - by Azza
    Hi, I am trying to move content in a pdf document using pdfSharp. We have a number of documents that are the same size i.e. 488x320mm, the content within these documents is always positioned relative to the top right of the document but varies in size i.e. 210x330mm, 240x350mm etc. What i need to do is 'find' the content block and move it from its current position to the centre of the sheet. Please help!

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  • How to use Multiple Variables for a lock Scope in C#

    - by Gunner
    I have a situation where a block of code should be executed only if two locker objects are free. I was hoping there would be something like: lock(a,b) { // this scope is in critical region } However, there seems to be nothing like that. So does it mean the only way for doing this is: lock(a) { lock(b) { // this scope is in critical region } } Will this even work as expected? Although the code compiles, but I am not sure whether it would achieve what I am expecting it to.

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  • User authentication in Django. Problems with is_authenticated

    - by tim
    I have one problem with users menu. So, I want, that authenticated user can see his/her profile page and logout (links) in menu. It works (when I logging in) on index page: index, page1, profile, logout ,but, if I go to the, for example, page1 I can see in menu: index, page1, login, not profile and logout. How to fix it? in urls: url(r'^accounts/login/$', 'django.contrib.auth.views.login' ), url(r'^accounts/logout/$', 'django.contrib.auth.views.logout_then_login' ), url(r'^accounts/profile/$', 'my_app.views.profile' ), in views: def profile(request): if not request.user.is_authenticated(): return HttpResponseRedirect("/accounts/login/") else: user = request.user.is_authenticated() return render_to_response('profile.html',locals()) Part of index.html: {% if user.is_authenticated or request.user.is_authenticated %} <li><a href="/accounts/profile/">Profile</a></li> <li><a href="/accounts/logout/">logout</a></li> {% else %} <li><a href="/accounts/login/">login</a></li> {% endif %} login.html: {% extends "index.html" %} {% load url from future %} {% block application %} {% if form.errors %} <p>Try one more time</p> {% endif %} <form method="post" action="{% url 'django.contrib.auth.views.login' %}"> {% csrf_token %} <table> <tr> <td>{{ form.username.label_tag }}</td> <td>{{ form.username }}</td> </tr> <tr> <td>{{ form.password.label_tag }}</td> <td>{{ form.password }}</td> </tr> </table> <input type="submit" value="Login" /> <input type="hidden" name="next" value="{{ next }}" /> </form> {% endblock %} profile.html: {% extends "index.html" %} {% block application %} {% if request.user.is_authenticated %} <p>Welcome, {{ request.user.username }}. Thanks for logging in.</p> {% else %} <p>Welcome, new user. Please log in.</p> {% endif %} {% endblock %}

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  • How to change the outlining hover color in VS 2010?

    - by RCIX
    If i hover over the thin vertical bar on the left, it highlights the entire scope of the block that's to the right. When this scope is large, my entire screen flashes white (a consequence of my custom color scheme). Is there a way to change that color? i don't recall there being one when i made the theme.

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  • IIS - IP Address and Domain Name Restrictions - not blocking IP addresses

    - by Funky
    I have added an IP address in IIS7 in the IP address and domain restrictions. From what I have read this should block all traffic to the folder apart from the allowed IP address. For some reason this does not work. If I access the section from my work computer all ok, when I access it from my phone I can still see the page. Does anyone have any idea why IIS is not blocking all the other IPs out? Thanks

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  • How can I retrieve the instance of an attribute's associated object?

    - by Brandon Linton
    I'm writing a PropertiesMustMatch validation attribute that can take a string property name as a parameter. I'd like it to find the corresponding property by name on that object and do a basic equality comparison. What's the best way to access this through reflection? Also, I checked out the Validation application block in the Enterprise Library and decided its PropertyComparisonValidator was way too intense for what we need.

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  • Visual Studio line deletion

    - by Sean
    Is there any way in Visual Studio 2003 that I can delete a line without it being copied into the clipboard? There are instances when I want to copy the first line of a block of text and then delete the following n lines but this then puts the last line I deleted into the clipboard, which is very annoying. I have come from a brief keymap background and I could easily do this with Alt-D. And while I'm on the subject, why on earth have MS stopped supporting the brief keymap?

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  • Is there a way to prevent a string of letters with no spaces from overflowing out of its correspondi

    - by Scarface
    The question is pretty straight forward, I have tried using a span with rules set to clear:both; and display:block;, at the bottom of each list entry where the text is being inserted in with no luck. I am not really sure what to do on this. I don't expect to many entries with long consecutive letter strings but for example if someone does lolololololol or ahaahahahhhhhhhhhhhhaaaaaaaa for like 100 letters, it will overflow. If anyone can give me a pointer I would really appreciate it.

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  • Simple question about the lunarlander example.

    - by Smills
    I am basing my game off the lunarlander example. This is the run loop I am using (very similar to what is used in lunarlander). I am getting considerable performance issues associated with my drawing, even if I draw almost nothing. I noticed the below method. Why is the canvas being created and set to null each cycle? @Override public void run() { while (mRun) { Canvas c = null; try { c = mSurfaceHolder.lockCanvas();//null synchronized (mSurfaceHolder) { updatePhysics(); doDraw(c); } } finally { // do this in a finally so that if an exception is thrown // during the above, we don't leave the Surface in an // inconsistent state if (c != null) { mSurfaceHolder.unlockCanvasAndPost(c); } } } } Most of the times I have read anything about canvases it is more along the lines of: mField = new Bitmap(...dimensions...); Canvas c = new Canvas(mField); My question is: why is Google's example done that way (null canvas), what are the benefits of this, and is there a faster way to do it?

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  • comparing indexPaths in a loop iphone

    - by Brodie4598
    I am trying to compare an index path in my didSelectRowAtIndexPath delegate method with an array of index paths. for (n=0; n < [tempMutArrray count]; n= n+1){ NSComparisonResult *result = [indexPath compare:[tempMutArray objectAtIndex:n]; //What I want to do is is write an if statement that executes a certain block of code //if the two index paths are equal, but I cant figure out how to work with an //NSComparisonResult. }

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  • Linq to SQL: how get row security between write access??

    - by Francisco
    I would like to allow two threads to write in a table at the same time (I know the problem of updating the same row, but this would be a story apart). I need that in behalf of speed up the operations in my aplication (one thread could write in row X while another could do the same in row X+n instead of waiting the first to finalize). So, can I block rows instead of tables with Linq to SQL? Thanks.

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  • Converting a list into a select with jquery

    - by Davemof
    I'm trying to convert the following list into a select list so it can be submitted via a form - the element within the lists will become the value of each option: <ul class="selected connected-list ui-sortable" style="height: 279px;"> <li class="ui-helper-hidden-accessible" style=""></li> <li title="Owner Name 1 - " class="ui-state-default ui-element ui-draggable" style="display: block; position: relative; top: 0px; left: 0px;"><span class="ui-icon-arrowthick-2-n-s ui-icon"></span>Owner Name 1 - <em class="thenumber">4.4796E+11</em><a class="action" href="#"><span class="ui-corner-all ui-icon ui-icon-minus"></span></a></li> <li title="David Moffat - " class="ui-state-default ui-element" style="display: block; position: relative; top: 0px; left: 0px;"><span class="ui-icon ui-icon-arrowthick-2-n-s"></span>David Moffat - <em class="thenumber">07730423005</em><a class="action" href="#"><span class="ui-corner-all ui-icon ui-icon-minus"></span></a></li> </ul> This should convert to the following format: <select style="display:none" class="selectoption" name="p_num[]" multiple="multiple"> <option value="">4.4796E+11</option> <option value="">07730423007</option> </select> I have tried the following jquery code, but after many hours I'm pulling my hair out: $('a.sendform').click(function(){ $('ul.selected').each(function() { var $select = $('<select />'); $(this).find('li').each(function() { var $option = $('<option />'); $option.attr('value', $(this).('em')).html($(this).html()); $select.append($option); }); $(this).replaceWith($select); }); }); Any help might save my remaining hair. Many thanks David

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  • How to prevent the other threads from accessing a method when one thread is accessing a method?

    - by geeta
    I want to search for a string in 10 files and write the matching lines to a single file. I wrote the matching lines from each file to 10 output files(o/p file1,o/p file2...) and then copied those to a single file using 10 threads. But the output single file has mixed output(one line from o/p file1,another line from o/p file 2 etc...) because its accessed simultaneously by many threads. If I wait for all threads to complete and then write the single file it will be much slower. I want the output file to be written by one thread at a time. What should i do? My source code:(only writing to single file method) public void WriteSingle(File output_file,File final_output) throws IOException { synchronized(output_file){ System.out.println("Writing Single file"); FileOutputStream fo = new FileOutputStream(final_output,true); FileChannel fi = fo.getChannel(); FileInputStream fs = new FileInputStream(output_file); FileChannel fc = fs.getChannel(); int maxCount = (64 * 1024 * 1024) - (32 * 1024); long size = fc.size(); long position = 0; while (position < size) { position += fc.transferTo(position, maxCount, fi); } } }

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  • What are some good code optimization methods?

    - by esac
    I would like to understand good code optimization methods and methodology. How do I keep from doing premature optimization if I am thinking about performance already. How do I find the bottlenecks in my code? How do I make sure that over time my program does not become any slower? What are some common performance errors to avoid (e.g.; I know it is bad in some languages to return while inside the catch portion of a try{} catch{} block

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  • Plural blocktrans problem with Django

    - by jorde
    I'm trying to translate a small block of text using Django's build in i18n. I don't know why but the following won't show up in different language: {% if store.rating_count %} {% blocktrans with store.rating_count as count %} {{ count }} review {% plural %} {{ count }} reviews {% endblocktrans %} {% else %} {% trans "No reviews" %} {% endif %} And a snipplet from my django.po (created with makemessages): #: templates/reviews/category.html:65 #, python-format msgid "%(count)s review" msgid_plural "%(count)s reviews" msgstr[0] "%(count)s arvostelu" msgstr[1] "%(count)s arvostelua" Other strings translate fine from the same template. I have rerun compilemessages few times.

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  • Why should I use PropertyProxyValidator? ASP.NET

    - by user102533
    I understand thatthe PropertyProxyValidator integrates with the ASP.NET UI. But, it cannot do client side validation. How would it be any different from throwing in a label in the UI and populating the errors on the server side? Also, If I am using Validation Application Block, what approaches do you suggest for client side validation if I don't want to duplicate rules on server and client side?

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