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• Detect backspace in UITextField

  - by marcc

  Is there any way to detect when the backspace/delete key is pressed in the iPhone keyboard on a UITextField that is empty? I want to know when backspace is pressed only if the UITextField is empty. Based on the suggestion from @Alex Reynolds in a comment, I've added the following code while creating my text field: [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleTextFieldChanged:) name:UITextFieldTextDidChangeNotification object:searchTextField]; This notification is received (handleTextFieldChanged function is called), but still not when I press the backspace key in an empty field. Any ideas? There seems to be some confusion around this question. I want to receive a notification when the backspace key is pressed. That's it. But the solution must also work when the UITextField is already empty.

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• this is my Receiving Email code,but can't Receiving Email .. (google-app-engine)

  - by zjm1126

  import logging, email from google.appengine.ext import webapp from google.appengine.ext.webapp.mail_handlers import InboundMailHandler from google.appengine.ext.webapp.util import run_wsgi_app class LogSenderHandler(InboundMailHandler): def receive(self, message): _subject = message.subject _sender=message.sender bodies = message.bodies('text/plain') allBodies = "" #for body in bodies: # allBodies = allBodies + "\n---------------------------\n" + body[1].decode() #m= mail.EmailMessage(sender="[email protected] ",subject="reply to "+_subject) #m.to = _sender #m.body =allBodies #m.send() message = mail.EmailMessage(sender="[email protected]", subject="Your account has been approved") message.to = _sender message.body = """ Dear Albert: Your example.com account has been approved. You can now visit http://www.example.com/ and sign in using your Google Account to access new features. Please let us know if you have any questions. The example.com Team """ message.send() application = webapp.WSGIApplication([LogSenderHandler.mapping()], debug=True) app.yaml: application: zjm1126 version: 1-2 runtime: python api_version: 1 inbound_services: - mail handlers: - url: /media static_dir: media - url: /_ah/mail/.+ script: handle_incoming_email.py login: admin - url: / script: a.py - url: /sign script: a.py - url: .* script: django_bootstrap.py i use my email:[email protected] send some words to [email protected] but i can't get a Receiving Email, why ??? thanks and this is the log:

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• Returning a byte array from activex to javascript

  - by vondip

  Hello all, I've built a small activex control using c#. I've got a function that returns an array of bytes. From some reason when I try to consue the returned array in js I receive an undefined value. Why is this happenning? Is there anyway to solve it? Here's a simple demonstration of my code: Activex: [ComVisible(true)] public byte[] Close() { try { MessageBox.Show("called from activex Close"); return Stop(); } catch (Exception e) { //ExceptionHandling.AppException(e); throw e; } } Javascript Call: function CloseActiveX(){ var myRslt = document.OurActiveX.Close(); }

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• Readdirectorychanges not working with big file

  - by sanky

  i was working with readdirectorychangesW till i encountered an unwanted behavior.below is short reference the way i am using my readdirectorychanges func. The behavior is that in case a big file in GBs is copied to the watched directory i get the notification immediately and thereby i start doing my operation according to the notification i receive ,but the file IO ( copy operation is still pending) and that results in unxpected state. Can anyone please suggest a way to synchronize this operation. I want the copy operation(that gave me notification) to get completed first then i want to do my processing. while(ReadDirectoryChangesW( hDir, pBuffer, nBufSize, FALSE, FILE_NOTIFY_CHANGE_FILE_NAME, &BytesReturned, NULL, NULL )) { pBufferCurrent = pBuffer; while(pBufferCurrent) { switch(pBufferCurrent->Action) { case FILE_ACTION_ADDED: break; default: break; } if (pBufferCurrent->NextEntryOffset) pBufferCurrent = (FILE_NOTIFY_INFORMATION*)(((oef_u8_t*)pBufferCurrent) + pBufferCurrent->NextEntryOffset); else pBufferCurrent = NULL; }

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• python blocking sockets, send returns immediately

  - by Mark

  Hi, I am writing a multithreaded socket application in Python using the socket module. the server listens for connections and when it gets one it spawns a thread for that socket. the server thread sends some data to the client. but the client is not yet ready to receive it. I thought this would have caused the server to wait until the client starts recv but instead returns immediately the client then calls recv which is blocking and no data is ever received. client socket constructor self.__clientSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) self.__clientSocket.connect((server, port)) server socket constructor self.servSock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) self.servSock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) #self.servSock.settimeout(None) self.servSock.setblocking(1) self.servSock.bind((self.addr,self.port)) self.servSock.listen(5) listening accept thread try: (cs, address) = self.servSock.accept() except socket.timeout: return threadName = '\r\nClient %s:%s\r\n' % (cs, address) print threadName clientSocketHandler = ClientSocket() clientSocketHandler.setClientSocket(cs) self.clients.newThread(self.clientFunc, {clientSocketHandler : "1"}, threadName).start() server and clients send/rec methods from inside ClientSocket receivedData = self.__clientSocket.recv(1024*1024) self.__clientSocket.send(s) any ideas why send() is returning straight away?

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• OAuth gives me 401 error

  - by Radek

  I am trying to get the access key but I cannot make it work. `request_token.get_access_token is giving me 401 Unauthorized (OAuth::Unauthorized) error. I copy the authorize_url into my browser, allow the application, I receive some kind of PIN from twitter but after hitting enter in my script I always get 401 error. I did some search and I found this helped access_token = request_token.get_access_token(:oauth_verifier => params[:oauth_verifier]) but it is giving me undefined local variable or methodparams' for main:Object (NameError)` the ruby script is like ( I was following this tutorial ) gem 'oauth' require 'oauth/consumer' consumer_key = 'your key' consumer_secret ='your secret' consumer=OAuth::Consumer.new "consumer_key", "consumer_secret", {:site=>"http://twitter.com"} #{:site=>"https://agree2.com"} request_token = consumer.get_request_token puts request_token.token puts request_token.secret puts request_token.authorize_url puts "Hit enter when you have completed authorization." STDIN.gets access_token = request_token.get_access_token #access_token = request_token.get_access_token(:oauth_verifier => params[:oauth_verifier]) puts access_token.token puts access_token.secret puts puts access_token.inspect

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• Flex socket crossdomain

  - by Yonatan Betzer

  I am trying to connect to a socket server from flex. I read, on adobe's documentation, the client automatically sends a "request-policy-file" xml element to the socket before allowing it to be opened, and should receive a policy file. The client sends the xml element as expected, My server receives it (on the port I want to use, port 6104) and replies on the same port with: <?xml version="1.0"?> <!DOCTYPE cross-domain-policy SYSTEM "http://www.adobe.com/xml/dtds/cross-domain-policy.dtd"> <cross-domain-policy> <site-control permitted-cross-domain-policies="all"/> <allow-access-from domain="*" to-ports="*"/> </cross-domain-policy> To the best of my knowledge, this should be the most permissive policy available on a socket. The flash player logs indicate a timeout looking for the socket policy file, although I know my socket returned the response immediately. What should I do ?

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• django internationalization doesn't work

  - by xRobot

  I have: * created translation strings in the template and in the application view. * run this command: django-admin.py makemessages -l it and the file it/LC_MESSAGES/django.po has been created * translated strings in the django.po file. * run this command: django-admin.py compilemessages and I receive: processing file django.po in /home/jobber/Desktop/library/books/locale/it/LC_MESSAGES * set this in settings.py: LANGUAGE_CODE = 'it' TEMPLATE_CONTEXT_PROCESSORS = ( "django.core.context_processors.auth", "django.core.context_processors.debug", "django.core.context_processors.i18n", "django.core.context_processors.media", ) USE_I18N = True MIDDLEWARE_CLASSES = ( 'django.middleware.common.CommonMiddleware', 'django.middleware.locale.LocaleMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', ) but.... translation doesn't work !! I always see english text. Why ?

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• nServiceBus with large XML messages

  - by Sean

  Hello, I have read about the true messaging and that instead of sending payload on the bus, it sends an identifier. In our case, we have a lot of legacy apps/services and those were designed to receive the payload of messages (xml) that is close to 4MB (close MSMQ limit). Is there a way for nService bus to handle large payload and persist messages automatically or another work-around, so that the publisher/subscriber services don't have to worry neither about the payload size, nor about how to de/re-hydrate the payload? Thank you in advance.

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• How to configure MessageEndpointMapping by namespace in NServiceBus

  - by SteveBering

  I am trying to configure my message endpoint mapping in my NServiceBus configuration by sending messages from different namespaces to different endpoints. As such, I have configured the following in my web.config: However, when my application starts, I receive the following exception: Spring.Objects.PropertyAccessExceptionsException: PropertyAccessExceptionsException (1 errors); nested PropertyAccessExceptions are: [Spring.Core.TypeMismatchException: Cannot convert property value of type [System.Collections.Hashtable] to required type [System.Collections.IDictionary] for property 'MessageOwners'., Inner Exception: System.ArgumentException: Problem loading message assembly: Company.Messages.Payments --- System.IO.FileNotFoundException: Could not load file or assembly 'Company.Messages.Payments' or one of its dependencies. The system cannot find the file specified. File name: 'Company.Messages.Payments' What I find interesting is that it seems to have found Company.Messages.Accounts but failed on the second configured line. I thought that maybe it didn't like have them all go to the same endpoint, but changing this configuration to have them go different endpoints didn't change the error message I received. What am I doing wrong? Is it not possible to segment messages by namespace (all I have seen is by type and by assembly)? Thanks, Steve

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• Figuring out the required MaxReceivedMessageSize in WCF with NetTcpBinding

  - by Flo

  I'm using NetTcpBinding in WCF and i want to send a Stream which does not exceed the size of 1 MB. I have set the MaxReceivedMessageSize to a really high number and that works fine of course. But I am curious: Does setting the MaxReceivedMessageSize to a very hight number have any (negative) impact or would it be useful to set it just above the size I actually want to send/receive? What kind of overhead can I expect when using the NetTcpBinding to transfer a stream? Meaning: when I send a stream of 1 MB, how large does my MaxReceivedMessageSize has to be?

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• AJAX: how to get progress feedback in web apps, and to avoid timeouts on long requests?

  - by David Dombrowsky

  This is a general design question about how to make a web application that will receive a large amount of uploaded data, process it, and return a result, all without the dreaded spinning beach-ball for 5 minutes or a possible HTTP timeout. Here's the requirements: make a web form where you can upload a CSV file containing a list of URLs when the user clicks "submit", the server fetches the file, and checks each URL to see if its alive, and what the title tag of the page is. the result is a downloadable CSV file containing the URL, and the result HTTP code the input CSV can be very large ( 100000 rows), so the fetch process might take 5-30 minutes. My solution so far is to have a spinning javascript loop on the client site, which queries the server every second to determine the overall progress of the job. This seems kludgy to me, and I'm hesitant to accept this as the best solution. I'm using perl, template toolkit, and jquery, but any solution using any web technology would be acceptable.

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• rspec, autotest and Rails 3 beta 2 can't find executable issue

  - by Toby Hede

  I am running Rails 3 Beta2 and attempting to get Autotest working with rspec. When I run autospec, I receive the following message: /usr/local/lib/ruby/site_ruby/1.8/rubygems.rb:334:in `bin_path': can't find executable autospec for rspec-2.0.0.beta.5 (Gem::Exception) from /usr/local/bin/autospec:19 I am using Ruby 1.9.1 with the following Gems: rails (3.0.0.beta2) railties (3.0.0.beta2) rspec (2.0.0.beta.5) rspec-core (2.0.0.beta.5) rspec-expectations (2.0.0.beta.5) rspec-mocks (2.0.0.beta.5) rspec-rails (2.0.0.beta.5) ZenTest (4.3.1) Any help would be greatly appreciated.

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• C++ Winsock non-blocking/async UDP socket

  - by Ragnagard

  Hi all! I'm developping a little data processor in c++ over UDP sockets, and have a thread (just one, and apart the sockets) that process the info received from them. My problem happens when i need to receive info from multiple clients in the socket at the same time. How could i do something like: Socket foo; /* init socket vars and attribs */ while (serving){ thread_processing(foo_info); } for multiple clients (many concurrent access) in c++? I'm using winsocks atm on win32, but just get standard blocking udp sockets working. No gui, it's a console app. I'll appreciate so much an example or pointer to one ;). Thanks in advance.

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• Installing Java3D on Eclipse

  - by Matt

  I'm trying to use Java3D in my project. This is the error I receive: 29-Dec-2010 1:01:29 AM javax.media.j3d.NativePipeline getSupportedOglVendor SEVERE: java.lang.UnsatisfiedLinkError: no j3dcore-ogl-chk in java.library.path Exception in thread "main" java.lang.UnsatisfiedLinkError: no j3dcore-d3d in java.library.path at java.lang.ClassLoader.loadLibrary(Unknown Source) at java.lang.Runtime.loadLibrary0(Unknown Source) at java.lang.System.loadLibrary(Unknown Source) at javax.media.j3d.NativePipeline$1.run(NativePipeline.java:189) at java.security.AccessController.doPrivileged(Native Method) at javax.media.j3d.NativePipeline.loadLibrary(NativePipeline.java:180) at javax.media.j3d.NativePipeline.loadLibraries(NativePipeline.java:137) at javax.media.j3d.MasterControl.loadLibraries(MasterControl.java:948) at javax.media.j3d.VirtualUniverse.<clinit>(VirtualUniverse.java:280) at World.<init>(World.java:10) at Start.main(Start.java:12) I have copied the .jar files into my project's lib folder and linked them in Project - Properties - Add Jar File. There was also a .dll file in the Java3D download that I haven't touched or included in any way. What am I missing?

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• Why gcc4 warn and how to avoid it

  - by vitaly.v.ch

  I have a function declared as: void event_add_card (EventAddr addr, EventType type, unsigned char card); and union typedef union EventData { float money; /**< money info */ unsigned char card; /**< new card */ } EventData; When i compile following code: EventData data = {}; event_add_card (0,0, data.card); with enabled warning -Wconversion I receive following warning: player-stud.c|71| warning: passing argument 3 of 'event_add_card' with different width due to prototype Why gcc4 unsuccessful and how to fix It???

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• Qt: Background color on QStandardItem using StyleSheet

  - by Johan

  Hi I have a class that inherits QStandardItem and I put the elements in a QTreeWidget. The class receive notifications from the outside and I want to change the background color of the item based on what happened. If I do not use stylesheets it works just fine, like this: void myClass::onExternalEvent() { setBackground(0, QColor(255,0,0))); } However as soon as I put a stylesheet on the QTreeWidget this has no effect, the stylesheet seems to override the setBackground call. So I tried : void myClass::onExternalEvent() { this-setStyleSheet("background-color: red"); } but this is probably all wrong, it changed the color of some other element on my screen, not sure why. So anyone have an idea on how I can alter the background color like with setBackgroundColor but still be able to use stylesheet on my QTreeWidget?

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• Memory leak found with clang but cant release and autorelease crashes

  - by Rudiger

  I have a class that builds a request based on a few passed in variables. The class also has all the delegate methods to receive the data and stores it in a property for the calling class to retrieve. When the class initializes it creates a connection and then returns itself: NSURLConnection *connection; if (self = [super init]) { self.delegate = theDelegate; ...some code here... connection = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self startImmediately:YES]; } return self; So I can't release it normally and if I autorelease it crashes. Is it the job of the calling class to release? And if so does just releasing the initilised object also release connection or do you have to release it specifically? If so how would you? Thanks

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• NodeJS and node-mongodb-native

  - by w1nk

  Just getting started with node, and trying to get the mongo driver to work. I've got my connection set up, and oddly I can insert things just fine, however calling find on a collection produces craziness. var db = new mongo.Db('things', new mongo.Server('192.168.2.6',mongo.Connection.DEFAULT_PORT, {}), {}); db.open(function(err, db) { db.collection('things', function(err, collection) { // collection.insert(row); collection.find({}, null, function(err, cursor) { cursor.each(function(err, doc) { sys.puts(sys.inspect(doc,true)); }); }); }); }); If I uncomment the insert and comment out the find, it works a treat. The inverse unfortunately doesn't hold, I receive this error: collection.find({}, null, function(err, cursor) { ^ TypeError: Cannot call method 'find' of null I'm sure I'm doing something silly, but for the life of me I can't find it...

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• Get signal names from numbers in Python

  - by Brian M. Hunt

  Is there a way to map a signal number (e.g. signal.SIGINT) to its respective name (i.e. "SIGINT")? I'd like to be able to print the name of a signal in the log when I receive it, however I cannot find a map from signal numbers to names in Python, i.e. import signal def signal_handler(signum, frame): logging.debug("Received signal (%s)" % sig_names[signum]) signal.signal(signal.SIGINT, signal_handler) For some dictionary sig_names, so when the process receives SIGINT it prints: Received signal (SIGINT) Thank you.

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• ASP .NET: SQL Server Money Type and .NET Currency Type

  - by Rudi Ramey

  MS SQL Server's Money Data Type seems to accept a well formatted currency value with no problem (example: $52,334.50) From my research MS SQL Sever just ignores the "$" and "," characters. ASP .NET has a parameter object that has a Type/DbType property and Currency is an available option to set as a value. However, when I set the parameter Type or DbType to currency it will not accept a value like $52,334.50. I receive an error "Input string was not in a correct format." when I try to Update/Insert. If I don't include the "$" or "," characters it seems to work fine. Also, if I don't specify the Type or DbType for the parameter it seems to work fine also. Is this just standard behavior that the parameter object with its Type set to currency will still reject "$" and "," characters in ASP .NET? Here's an example of the parameter declaration (in the .aspx page): <asp:Parameter Name="ImplementCost" DbType="Currency" />

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• GhostScript font issues

  - by Robert

  I'm running GPL Ghostscript 8.70 (2009-07-31) on Windows XP. I have about 100 PDF files I've attempted to run through GS, but I'm having font-related issues on two separate groups of files from two different customers. I'm not sure if the issues could be related. Here are the two errors I receive: Loading Courier font from C:\Program Files\gs\fonts/cour.ttf... 2343384 986555 13583240 12261829 3 done. Using CourierNewPSMT font for Courier. Error: /rangecheck in --get-- Can't find CID font "Arial". Substituting CID font /Adobe-Identity for /Arial, see doc/Use.htm#CIDFontSubstitution. The substitute CID font "Adobe-Identity" is not provided either. Will exit with error. Error: /undefined in findresource I've tried just about everything I can think of with fontmap and cidfmap. Does anyone out there have a solution?

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• Voice transmission over LAN using java?

  - by Ala ABUDEEB

  Hello I'm building a java application which works in a LAN environment, every computer on that LAN have this application installed on it, at some point i need this application to transfer voice simultaneously to all computer over the LAN (voice broadcasting) according to the following mechanism: Only one computer of the LAN can send voice using a microphone(the administrator) All computers receive that voice simultaneously (of course using my application) The voice should be recorded on the administrator computer after finishing the session. Could anyone give me an idea of how to use java in working with voice transmission? What java library can help me do that? Please help, thank you

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• Timeout event in netty 4

  - by user1819425

  Hi I would like receive an event where messageReceived does not get called within an expected time. I tried with ReadTimeoutHandler where it generates exception where I can handle in exceptionCaught() where I would would do some work and return without closing the context. but right after that I got a bunch of exception Nov 18, 2012 8:56:34 AM io.netty.channel.ChannelInitializer WARNING: Failed to initialize a channel. Closing: [id: 0xa81de260, /127.0.0.1:59763 = /127.0.0.1:59724] io.netty.channel.ChannelHandlerLifeCycleException: io.netty.handler.timeout.ReadTimeoutHandler is not a @Sharable handler, so can't be added or removed multiple times. at io.netty.channel.DefaultChannelPipeline.callBeforeAdd(DefaultChannelPipeline.java:629) at io.netty.channel.DefaultChannelPipeline.addLast0(DefaultChannelPipeline.java:173) Am I doing correctly? Thanks

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• How to connect to local MQseries queue using Python?

  - by Michal Niklas

  I am new to mqseries and I started with IBM WebSphere MQ curses. There are examples with MQ_APPLE and MQ_ORANGE queue managers. I have no problem with sending messages to local or remote queue with MQ Explorer, but I wanted to send such message from code: Python or Java. I tried Python pymqi library with code like this: import pymqi qmgr = pymqi.QueueManager(None) qmgr.connect('QM_APPLE') putq = pymqi.Queue(qmgr, 'Q1') putq.put('Hello from Python!') but I receive error: Traceback (most recent call last): File "mq_put.py", line 4, in <module> qmgr.connect('QM_APPLE') File "c:\Python26\lib\site-packages\pymqi.py", line 758, in connect raise MQMIError(rv[1], rv[2]) pymqi.MQMIError: MQI Error. Comp: 2, Reason 2540: FAILED: MQRC_UNKNOWN_CHANNEL_NAME There is QM_APPLE queue manager with Q1 local queue. What is wrong with my code?

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