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• Determining a Flex event's default behavior

  - by Jeremy Mitchell

  How can I tell what the default behavior for a cancelable event is? For example, I read somewhere that the TextEvent.TEXT_INPUT has a default behavior and that default behavior includes adding a text character associated with the key that was pressed to a TextInput. That makes perfect sense. But if I hadn't read that, how would I know what the default behavior is? Other than guessing. In this case, it's probably obvious. But in other situations, it might not be. For example, in the docs, look at DataGridEvent.HEADER_RELEASE's cancelable property. It says: cancelable: true so, there appears to be a "default behavior" associated with a DataGridEvent.HEADER_RELEASE event. But what is it? And why would I cancel it if I'm not really sure what it is? :) thanks.

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• Model Django Poll

  - by MacPython

  I followed the django tutorial here: http://docs.djangoproject.com/en/dev/intro/tutorial01/ and now I am at creating a poll. The code below works fine until I want to create choices, where for some reason I always get this error message: line 22, in unicode return self.question AttributeError: 'Choice' object has no attribute 'question' Unfortunatley, I dont understand where I made an error. Any help would be greatly appreciated. Thanks for the time! CODE: import datetime from django.db import models class Poll(models.Model): question = models.CharField(max_length=200) pub_date = models.DateTimeField('date published') def __unicode__(self): return self.question def was_published_today(self): return self.pub_date.date() == datetime.date.today() class Choice(models.Model): poll = models.ForeignKey(Poll) choice = models.CharField(max_length=200) votes = models.IntegerField() def __unicode__(self): return self.question

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• Should I be using assert in my PHP code?

  - by Darryl Hein

  A co-worker has added the assert command a few times within our libraries in places where I would have used an if statement and thrown an exception. (I had never even heard of assert before this.) Here is an example of how he used it: assert('isset($this->records); /* Records must be set before this is called. */'); I would have done: if ( ! isset($this->records) { throw new Exception('Records must be set before this is called'); } From reading the PHP docs on assert, it looks like it's recommended that make sure assert is active and add a handler before using assert. I can't find a place where he's done this. So, my question is, is using assert a good idea given the above and should I be using it more often instead of if's and exceptions?

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• Multiple Producers Single Consumer Queue

  - by Talguy

  I am new to multithreading and have designed a program that receives data from two microcontroller measuring various temperatures (Ambient and Water) and draws the data to the screen. Right now the program is singly threaded and its performance SUCKS A BIG ONE. I get basic design approaches with multithreading but not well enough to create a thread to do a task but what I don't get is how to get threads to perform seperate task and place the data into a shared data pool. I figured that I need to make a queue that has one consumer and multiple producers (would like to use std::queue). I have seen some code on the gtkmm threading docs that show a single Con/Pro queue and they would lock the queue object produce data and signal the sleeping thread that it is finished then the producer would sleep. For what I need would I need to sleep a thread, would there be data conflicts if i didn't sleep any of the threads, and would sleeping a thread cause a data signifcant data delay (I need realtime data to be drawn 30 frames a sec) How would I go about coding such a queue using the gtkmm/glibmm library.

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• Document -> Flash viewer, not hosted

  - by Dane

  I've got a content management solution where we present scanned images (TIFF), PDFs, word docs for viewing. While we can simply embed a PDF, sometimes depending on user preferences it's a bit fiddly and sometimes not user-intuitive. I'd like a solution like scribd, embedit, etc, but not hosted. I want to run the application on our own servers and manage it that way (for legal reasons, and our clients won't buy the service if it's hosted somewhere else). SWFtools looks a little basic for my needs, plus doesn't do doc, docx or ppt. Any options? Doesn't have to be free, but would be ideal.

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• Import module stored in a cStringIO data structure vs. physical disk file

  - by Malcolm

  Is there a way to import a Python module stored in a cStringIO data structure vs. physical disk file? It looks like "imp.load_compiled(name, pathname[, file])" is what I need, but the description of this method (and similar methods) has the following disclaimer: Quote: "The file argument is the byte-compiled code file, open for reading in binary mode, from the beginning. It must currently be a real file object, not a user-defined class emulating a file." [1] I tried using a cStringIO object vs. a real file object, but the help documentation is correct - only a real file object can be used. Any ideas on why these modules would impose such a restriction or is this just an historical artifact? Are there any techniques I can use to avoid this physical file requirement? Thanks, Malcolm [1] http://docs.python.org/library/imp.html#imp.load_module

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• Setup sonar-runner for multiple java projects

  - by zetafish

  I am trying to run sonar-runner to analyze multiple Java projects in one go. According to the documentation http://docs.codehaus.org/display/SONAR/Analyse+with+a+simple+Java+Runner it is just a matter of creating a sonar-project.properties file for each project. But it is not clear to me where exactly I have to put these sonar-project.properties files. I tried to add multiple .properties files in the $SONAR_RUNNER_HOME/conf folder but the runner does not seem to pick them up. It only sees the sonar-project.properties file. Any suggestions on how to run sonar-runner for multiple projects?

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• Codeigniter Image Library Cropping an Image with 2 sets of coordinates to make square anywhere?

  - by chris

  Spending time reading through the docs, and searching for examples. I understand cropping an image from top 0, and left 0 is pretty straight forward. However. I would like to pass 2 sets of coordinates, a starting point and an ending point. Four Points, a Square that is defined anywhere. However from the examples I am finding, and from what I gather the rendition is not going to let me do this. codeigniter so I am seeking confirmation on this thought, is it true that I can only provide end points from 0, and it crops a square based on said end points or can I actually specify an x start, an x end, and similar for y? Or is there some other technique I can use within codeigniter that will allow me to pass for coordinates for starting and ending points?

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• How to get Field Labels from PIMItem - Blackberry

  - by Taha

  How can we get Field Labels from PIMItem. The following code is with PIMList String label = pimList.getAttributeLabel(blackBerryContact.getAttributes(Contact.TEL, i)); But i have PIMItem. There is a method PIMItem.getPIMList() which returns null for me in the code below. THE API at http://www.blackberry.com/developers/docs/5.0.0api/index.html says "getPIMList() Gets the PIMList associated with this item." Below is sample code that i am trying to achive - // Load the address Book and allow the user to select a contact BlackBerryContactList contactList = (BlackBerryContactList) PIM.getInstance().openPIMList(PIM.CONTACT_LIST,PIM.READ_ONLY); PIMItem userSelectedContact = contactList.choose(); // Now get the Field labels for contact numbers for userSelectedContact

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• Link to specific page on Google Document Viewer on iPad

  - by Debarupa De

  I am thinking of using the Google Document Viewer to show PDF files that are hosted by our company server. The scenario is: A webpage will contain a menu with menu items that are actually different pages of a PDF file. After clicking a menu item, that particular page from the pdf will be displayed on that same web page This project is targeted for mobile devices (iPad, for now) Now, I am using an iFrame like below: But I don't know if linking to a specific page is possible or Google would like that because I tried the solutions posted on how to open specific page on Google's docs viewer and http://googlesystem.blogspot.com/2009/11/link-to-page-in-googles-document-viewer.html but all of them seem to be outdated. Is this even possible? Thanks for any help.

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• Convert Google results object (pure js) to Python object

  - by colwilson

  So I'm trying to use Google Map suggest API to request place name suggestions. Unfortunately I can't find the docs for this bit. Here is an example URI: http://maps.google.com/maps/suggest?q=lon&cp=3&ll=55.0,-3.5&spn=11.9,1.2&hl=en&gl=uk&v=2 which returns: {suggestion:[{query:"London",... I want to use this in python (2.5). Now in proper JSON there would have been quotations around the keys like so: {"suggestion":[{"query":"London",... and I could have used simplejson or something, but as it is I'm a bit stuck. There are two possible solutions here; either I can get to the API code and find an option to return proper JSON, or I do that in python. Any ideas please.

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• Training new employees on undocumented code

  - by glowcoder

  Our company has a large codebase (2500+ classes/interfaces in just the core alone, many more in other projects) for our flagship software product. We've never really hired more than one developer at a time, so we don't have a real training process. We're going to be bringing in 2-5 more developers now, and probably more in the near future (to put things into perspective, we have 7 right now.) Obviously, we would like to get these guys up to speed as soon as possible. The catch - almost all of our classes (95%+) are completely undocumented. No javadoc, no design docs, basically completely undocumented. What strategies can we employ to bring the new developers up to speed? I'd like to consider situations that include the existing code getting documented, but it's possible management won't allow for the time to get that done, so I also must consider situations where that won't happen. Has anyone been there before? What worked well for you? Thanks!

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• How to parse a hierarchical structure in Rebol ?

  - by Rebol Tutorial

  I have reread chapter http://www.rebol.com/docs/core23/rebolcore-15.html on any and parse but can't achieve to parse this kind of hiearchical structure: is it possible ? <Multipage> <tab id=1> <box id=1> </box> </tab> <tab id=2> <box id=2> Hello </box> </tab> <tab> </tab> <tab> </tab> </Multipage>

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• How do I programmatically add an Android Gestures view to a custom view?

  - by user351201

  I have a custom view that works fine and I'm trying to get gestures into it. The most common technique I see is to add XML, such as this (from Android docs: My view is within a RelativeView and when I attempt to reference this GetureOverlayView, I get an exception. I've also tried to connect within my existing custom view class, like this: mGestures = new GestureOverlayView(context, attrs); mGestures.addOnGesturePerformedListener(this); But the callback is never invoked. Can someone see my errors or suggest a better way that will allow me to get gesture callbacks?

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• How to tell the MinGW linker not to export all symbols?

  - by James R.

  Hello, I'm building a Windows dynamic library using the MinGW toolchain. To build this library I'm statically linking to other 2 which offer an API and I have a .def file where I wrote the only symbol I want to be exported in my library. The problem is that GCC is exporting all of the symbols including the ones from the libraries I'm linking to. Is there anyway to tell the linker just to export the symbols in the def file? I know there is the option --export-all-symbols but there seems not to be the opposite to it. Right now the last line of the build script has this structure: g++ -shared CXXFLAGS DEFINES INCLUDES -o library.dll library.cpp DEF_FILE \ OBJECT_FILES LIBS -Wl,--enable-stdcall-fixup EDIT: In the docs about the linker it says that --export-all-symbols is the default behavior and that it's disabled when you don't use that option explicitly if you provide a def file, except when it doesn't; the symbols in 3rd party libs are being exported anyway. EDIT: Adding the option --exclude-libs LIBS doesn't keep their symbols from being exported either.

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• JBoss envers and huge audit tables

  - by LeChe

  All, I am auditing my JEE application with JBoss Evers and the nature of my application causes the audit table to grow very fast. The historic data is queried infrequently and access time is not really an issue, apart from the data from the last week. This data IS queried frequently and access needs to be fast. Ideally, I would split the data and distribute it over two tables, with the older data in compressed format. Unfortunately, Envers does not allow spreading data over multiple tables as far as I can tell from the docs. Does somebody have any idea what would be the best way to achieve this (if possible while still using Envers)? Cheers, LeChe

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• SSL_CTX_set_cert_verify_callback vs. SSL_CTX_set_verify

  - by BreakPoint

  Hello, Can anyone tell me what is the difference between SSL_CTX_set_cert_verify_callback and SSL_CTX_set_verify? From OpenSSL docs: SSL_CTX_set_cert_verify_callback() sets the verification callback function for ctx. SSL objects that are created from ctx inherit the setting valid at the time when SSL_new(3) is called. and: SSL_CTX_set_verify() sets the verification flags for ctx to be mode and specifies the verify_callback function to be used. If no callback function shall be specified, the NULL pointer can be used for verify_callback. So I'm trying to understand which callback to send for each one (from client side). Thanks experts.

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• Dirty Reads in Postgres

  - by User1

  I have a long running function that should be inserting new rows. How do I check the progress of this function? I was thinking dirty reads would work so I read http://www.postgresql.org/docs/8.4/interactive/sql-set-transaction.html and came up with the following code and ran it in a new session: SET SESSION CHARACTERISTICS AS SERIALIZABLE; SELECT * FROM MyTable; Postgres gives me a syntax error. What am I doing wrong? If I do it right, will I see the inserted records while that long function is still running? Thanks

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• Geeting internal Oracle connection from Hibernate in JBoss

  - by espressoshot

  Hello, I need to set an application context through Hibernate. I found there is a method setApplicationContext on oracle.jdbc.internal.OracleConnection. I wrote a test, in which I was getting the Oracle connection from the Hibernate session and it worked fine. However, when I moved the code to my application running under JBoss where connections are obtained from the pool the solution won't work. The error is: $Proxy51 cannot be cast to oracle.jdbc.internal.OracleConnection. (1) How can I get the internal connection in that environment? (2) Is there a better way to set an application context through Hibernate (docs don't say anything about it). Thanks so much. Kris

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• Why does Google append while(1); in front of their JSON responses?

  - by Andrew Koester

  This is something I've always been curious about, is exactly why Google appends while(1); in front of their (private) JSON responses. For example, here's a response while turning a calendar on and off in Google Calendar: while(1);[['u',[['smsSentFlag','false'],['hideInvitations','false'],['remindOnRespondedEventsOnly','true'],['hideInvitations_remindOnRespondedEventsOnly','false_true'],['Calendar ID stripped for privacy','false'],['smsVerifiedFlag','true']]]] I would assume this is to prevent people from doing an eval() on it, but all you'd really have to do is replace the while and then you'd be set. I would assume eval prevention is to make sure people write safe JSON parsing code. I've seen this used in a couple other places, too, but a lot more so with Google (Mail, Calendar, Contacts, etc.) Strangely enough, Google Docs starts with &&&START&&& instead, and Google Contacts seems to start with while(1); &&&START&&&. Does anyone know what's going on here?

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• JsonStore.insert() causes exception in extjs

  - by kalan

  I have an EditorGridPanel with toolbar button to add new records. Everything works fine except one scenario. When I try to insert a record which already exists in database, server sends back: {"success":false,"message":"already exists","data":{}} but grid creates a new row marked with red triangle. If after that I try to insert a new record (even if it doesn't exist in database), everything works fine on the server side, but i get an 'uncaught exception' in firebug. It says: 'uncaught exception: Ext.data.DataReader: #realize was called with invalid remote-data. Please see the docs for DataReader#realize and review your DataReader configuration.' why is that?

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• Facebook Graph API - Get like count on page/group photos

  - by JackLeo

  I've been testing graph API and ran into a problem. How can I get like count from photos of a page/group? I'm administrator/creator of a group. When entering in https://developers.facebook.com/tools/explorer/ certain photo ID from that group it brings almost all data, even comments, but not the like count. For like part it needs (according to docs) access token despite the fact that anyone can access that info. How to get access token of my page/group with required permissions and how to use it to get info I need? If possible I would like to get JSON from a single address if it is possible.

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• PHP namespaces and using the \ prefix in declaration

  - by Jason McCreary

  The following throws an error stating Exception can no be redeclared. namespace \NYTD\ReadingListBackend; class Exception extends \Exception { } However, removing the \ prefix in the namespace declaration does not: namespace NYTD\ReadingListBackend; I recently adopted PHP namespaces. My understanding is that namespaces prefixed with \ are a fully qualified name. So why can't I use the prefix in the namespace declaration? I can when referencing (e.g. new \NYTD\ReadingListBackend\Exception). Would appreciate a full explanation as I couldn't find anything in the docs.

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• trying to load css/images in django

  - by tipu

  I looked http://docs.djangoproject.com/en/dev/howto/static-files/ already, but am still confused on how to get css/image files loaded. On my server, the images folder and css file are located at /srv/twingle/search my urls.py 1 from django.conf.urls.defaults import * 2 3 # Uncomment the next two lines to enable the admin: 4 # from django.contrib import admin 5 # admin.autodiscover() 6 7 urlpatterns = patterns('twingle.search.views', 8 url(r'^$', 'index'), 9 url(r'^search/(?P<param>\w+)$', 'index'), 10 ) 11 (r'^site_media/(?P<path>.*)$', 'django.views.static.serve', 12 {'document_root': '/srv/twingle/search'}), 13 I try to access my css as follows, <link rel="stylesheet" type="text/css" href="/site_media/style.css" /> That's exactly how the tutorial says to do it, but it doesn't work. Any suggestions?

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• Column.DbType affecting runtime behavior

  - by leppie

  Hi According to the MSDN docs, the DbType property/attribute of a Column type/element is only used for database creation. Yet, today, when trying to submit data to an IMAGE column on a SQLCE database (not sure if only on CE), I got an exception of 'Data truncated to 8000 bytes'. This was due to the DbType still being defined as VARBINARY(MAX) which SQLCE does not support. Changing the type to IMAGE in the DbType fixes the issue. So what other surprises does Linq2SQL attributes hold in store? Is this a bug or intended? Should I report it to MS? UPDATE After getting the answer from Guffa, I tested it, but it seems for NVARCHAR(10) adding a 11 char length string causes a SQL exception, and not Linq2SQL one. The data was truncated while converting from one data type to another. [ Name of function(if known) = ] A first chance exception of type 'System.Data.SqlServerCe.SqlCeException' occurred in System.Data.SqlServerCe.dll

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