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• PHP, ImageMagick, Google's Page Speed, & JPG File Size Optimization

  - by Sonny

  I have photo gallery code that does image re-sizing and thumbnail creation. I use ImageMagick to do this. I ran a gallery page through Google's Page Speed tool and it revealed that the re-sized images and thumbnails both have about an extra 10KB of data (JPEG files specifically). What can I add to my scripts to optimize the file size? ADDITIONAL INFORMATION I am using the imagick::FILTER_LANCZOS filter with a blur setting of 0.9 when calling the resizeImage() function. JPEGs have a quality setting of 80.

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• Entity Framework - SaveChanges with GUID as EntityKey

  - by MissingLinq

  I have a SQL Server 2008 database table that uses uniqueidentifier as a primary key. On inserts, the key is generated on the database side using the newid() function. This works fine with ADO.NET. But when I set up this table as an entity in an Entity Framework 4 model, there's a problem. I am able to query the entity just fine, but when creating a new entity and invoking SaveChanges() on the context, the generated uniqueidentifier on the database is all zeros. I understand there was an issue with EF v1 where this scenario did not work, requiring creating the GUID on the client prior to calling SaveChanges. However, I had read in many places that they were planning to fix this in EF 4. My question -- is this scenario (DB-side generation of uniqueidentifier) still not supported in EF4? Are we still stuck with generating the GUID on the client?

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• java.sql.SQLException: SQL logic error or missing database, SQLite, JDBC

  - by Sunil Kumar Sahoo

  Hi All, I ahve created database connection with SQLite using JDBC in java. My sql statements execute properly. But sometimes I get the following error while i use conn.commit() java.sql.SQLException: SQL logic error or missing database Can anyone please help me how to avoid this type of problem. Can anyone give me better approach of calling JDBC programs Class.forName("org.sqlite.JDBC"); conn = DriverManager.getConnection("jdbc:sqlite:/home/Data/database.db3"); conn.setAutoCommit(false); String query = "Update Chits set BlockedForChit = 0 where ServerChitID = '" + serverChitId + "' AND ChitGatewayID = '" + chitGatewayId + "'"; Statement stmt = conn.createStatement(); try { stmt.execute(query); conn.commit(); stmt.close(); stmt = null; } Thanks Sunil Kumar Sahoo

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• TypeLoadException says 'no implementation', but it is implemented

  - by Benjol

  (I spent a few hours yesterday fighting with this problem, couldn't find any solutions here or anywhere else, so I'm adding this here for anyone else who has this problem.) I've got a very weird bug on our test machine. The error is: System.TypeLoadException: Method 'SetShort' in type 'DummyItem' from assembly 'ActiveViewers (...)' does not have an implementation. I just can't understand why - I'm looking at my code, SetShort is there in the DummyItem class, and I've even recompiled a version with writes to the event log just to make sure that it's not a deployment/versioning issue. The weird thing is that the calling code doesn't even call the SetShort method...

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• Converting cv::Mat to IplImage*

  - by amr

  The documentation on this seems incredibly spotty. I've basically got an empty array of IplImage*s (IplImage** imageArray) and I'm calling a function to import an array of cv::Mats - I want to convert my cv::Mat into an IplImage* so I can copy it into the array. Currently I'm trying this: while(loop over cv::Mat array) { IplImage* xyz = &(IplImage(array[i])); cvCopy(iplimagearray[i], xyz); } Which generates a segfault. Also trying: while(loop over cv::Mat array) { IplImage* xyz; xyz = &array[i]; cvCopy(iplimagearray[i], xyz); } Which gives me a compile time error of: error: cannot convert ‘cv::Mat*’ to ‘IplImage*’ in assignment Stuck as to how I can go further and would appreciate some advice :)

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• Objective-C runtime reflection (objc_msgSend): does it violate the iPhone Developer License Agreemen

  - by GamingHorror

  Does code like this (potentially) violate the iPhone Developer License Agreement? Class clazz = NSClassFromString(@"WNEntity"); id entity = [clazz entityWithImage:@"Icon.png"]; SEL setPositionSelector = NSSelectorFromString(@"setPosition:"); objc_msgSend(entity, setPositionSelector, CGPointMake(200, 100)); I'm working on code that dynamically allocates classes from XML and calls methods on them via objc_msgSend. It's just very convenient constructing my objects that way but it worries me because i have no idea whether this is ok or violates the License by dynamically executing code or maybe even calling private (?) API functions. They wouldn't be documented if they were private, right? Can someone shed some light on this? Have you had an App approved or rejected using code similar to the above? I'm pretty sure that this is ok but i wan't to hear it from someone else! :)

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• [UIScreen applicationFrame] returning incorrect rectangle on landscape application launch (iPhone/iP

  - by jbrennan

  Having trouble getting the correct bounds for my iPad application when launching it in landscape mode. I have the proper keys set in my Info.plist file, and my view controllers launch properly in landscape (and portrait, natch). In my applicationDidFinishLaunching: method I'm calling a selector after a 3 second delay, and that method makes a call to [[UIScreen applicationFrame]`, but it's returning me a portrait frame (ie height width). Does anyone know how to fix this? It smells like a bug to me (if so I'll file a radar), but if it's intended behaviour, where is it documented?

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• mootools errors in Joomla...

  - by Luis

  Hi.. I'm having a problem.. the site is working correctly in safari, chrome and firefox (mac and win) but in Internet explorer I get an error related with mootools: Line: 59 Character: 102. The site URL is: http://my-essencia.com I've noticed that mootools is being loaded two times, maybe another component is calling it again, how can I remove this call?? or how can I locate witch component is making this call?? Another thing is the gmaps doesn't work (only in IE)(it worked before) This map is generated by a component named iproperty, I've asked in the support forums but no responses. This is very frustrating because I didn't make the site and I don't know what was installed wrong. Any advice or directions will be very appreciated. Thank you guys, Luis.

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• From actionscript to google's datastore through java.

  - by Jonathan

  I'm working on a flash game written in pure actionscript 3.0 in Flex. I've just finished implementing replays for the game, but want to store the top 10 hiscores' replay data on my google-app-engine'd website. I'm using Java for the app-engine stuff in Eclipse in java but I have no idea how to deal with communicating to my java code from my actionscript code. I'll need to both read and write from actionscript - java - datastore. Does anyone have any experience with this? For note, I'm horribly noob with anything to do with web development. I hear you can pass arguments to a URL when calling it, comparable to command-line arguments on a desktop executable and if so then sending all the data as a large string would be doable... The question then would be how to call a url from AS3 code with additional data and then how to catch that on the java side. Thanks to anyone who can help. Jono

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• Creating meaningful add URLs in Cakephp

  - by Loftx

  Hi there, For my site I have a number of Orders each of which contains a number of Quotes. A quote is always tied to an individual order, so in the quotes controller I add a quote with reference to it's order: function add($orderId) { // funtion here } And the calling URL looks a bit like http://www.example.com/quotes/add/1 It occurred to me the URLs would make more sense if they looked a bit more like http://www.example.com/orders/1/quotes/add As the quote is being added to order 1. Is this something it's possible to achive in CakePHP? Cheers, Tom

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• WPF ItemsViewSource Sorting

  - by niao

  Greetings, I have a problem with sorting ItemsViewSource in WPF. The problem is as follows: My application has a listbox with items, there is a possibility to add new items to this listbox. I have ItemsViewSource which is binded to ListBox ItemsSource - by default some sortDescription is applied (by name) so when new item is added to the listbox it is automatically added to appopriate position in ListBox. I also have a ToggleButton named "No sorting" and what I would like to achieve - when this butt is pressed and new item is added to listbox, the item will be included in the first position in ListBox and additionally previous sorting will be preserved. I can achieve the functionality of adding new item to first position on the list by calling _ItemsViewSource.SortDescriptions.Clear(); but then my previous sorting is not preserved. How can I achieve this and preserve previous sorting? Thanks in advance.

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• Sharepoint Web Part OnPreRender PostBack Dynamic TextBoxes Not Accessible In Button Handler

  - by Matt

  I have a custom webpart which extends System.Web.UI.WebControls.WebPart and implements an EditorPart. I have all the static controls being added in the overridden CreateChildControls method as I know this makes them persistent across PostBacks. However, I have some TextBoxes being added in the overridden OnPreRender method because the actual TextBoxes that I add depend upon the data returned from a Web Service which I am calling in OnPreRender. The Web Service has to be called in OnPreRender because I need some of the Property values that are set in the EditorPart. If I build this logic into the CreateChildControls method, obviously the data is not available on first PostBack after an edit is applied because the PostBack events are restored after CreateChildControls. This means the page has to be posted twice before the data is refreshed and that is just cludgy. How can make these TextBoxes along with their entered text values persistent across PostBacks so that I can access them in the button handler? Thanks for any help, Matt

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• How to run date picker onclick event?

  - by Nitz

  Hey Guys I am using this date picker from jqueryui. If see on that page, then u will find that they have just written in one function...means this... $(function() { $("#datepicker").datepicker(); }); </script> But i want to open my date picker on one text box click event. so i have written this $("#datepicker").datepicker(); in one function which i am calling on textbox onclick event. but in this there is one problem coming.. i am only get date picker on second time click on text box. if i click first time after page load then date picker will not come but as soon as i click second time then date picker is coming? WHY? AND CAN I DO IT ON FIRST CLICK? yes i know this already happening perfect if i put first code but i want it on my function.

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• Java interface to Windows communications? (OLE, OPC, DDE)

  - by Jared

  I need to integrate an off-the-shelf Windows application with a Java application. At a few key points, I need the Windows application to send an "event" and some data to the Java application. The Windows application anticipated this need, and can be configured to "Poke a DDE Item", "Set an OLE Auto-Property" or "Write an OPC Item". I'm already using JACOB to call COM methods and set COM properties on a COM object. However, I'm guessing that's pretty unrelated to these "event" notification capabilities. Anyone have any experience calling FROM a Windows application to a "DDE Item", "OLE Auto-Property" or "OPC Item" that's actually in a JVM? Any pointers, advice, etc, would be appreciated.

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• How do I pass credentials to a machine so I can use Microsoft.Win32.RegistryKey.OpenRemoteBaseKey()

  - by JCCyC

  This .NET API works OK if I'm trying to open the Registry in a machine that's in the same domain as I am (and my logged-on user has admin rights on the target machine). It gets tricky if it's an out-of-domain machine with a different, local administrative user (of whom I do have the password). I tried to use WNetUseConnection() (which has served me well in the past in situations where what I wanted was to read a remote disk file) prior to calling OpenRemoteBaseKey(), but no dice -- I get an access denied exception. Clearly, I must pass credentials some other way, but how?

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• Symfony2 trans_default_domain is not working

  - by user1069843

  At the end of http://symfony.com/doc/current/book/translation.html#twig-templates I read about {% trans_default_domain "app" %} to set a translation domain for a whole template. But for me it does not work. Calling app/console translation:extract de --dir=src/ --output-dir=app/Resources/translations --output-format=xliff --keep Just puts all messages in the messages.de.xliff file. But if I set the domain manually for a given label like {{ label.name|trans({}, 'app') }} And execute the same extract command as above, then I get a new file app.de.xliff Is there anything more to do when using trans_default_domain?

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• Is it possible to reset NSURLConnection after providing credentials?

  - by John

  I am calling a REST service that requires basic auth and I respond to the didReceiveAuthenticationChallenge delegate OK NSURLCredential *credential = [[NSURLCredential alloc] initWithUser:self.user password:self.password persistence:NSURLCredentialPersistenceForSession]; [[challenge sender] useCredential:credential forAuthenticationChallenge:challenge]; [credential release]; The Credentials are valid for the Session but I would like for my App to be able to switch between servers and therefore need to "reset" the Session so it asks again for a challenge. I can of course try the option of not storing the credentials for the Session and supply them for each call but this does not seem like a good idea. Any ideas would be appreciated!

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• HttpWebRequest to different IP than the domain resolves to

  - by fyjham

  Hey, Long story short an API I'm calling's different environments (dev/staging/uat/live) is set up by putting a host-record on the server so the live domain resolves to their other server in for the HTTP request. The problem is that they've done this with so many different environments that we don't have enough servers to use the server-wide host files for it anymore (We've got some environments running off the same servers - luckily not dev and live though :P). I'm wondering if there's a way to make WebRequest request to a domain but explicitly specify the IP of the server it should connect to? Or is there any way of doing this short of going all the way down to socket connections (Which I'd really prefer not to waste time/create bugs by trying to re-implementing the HTTP protocol). PS: I've tried and we can't just get a new sub-domain for each environment.

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• How to read STDIN into string variable until EOF in C?

  - by NovumCoder

  Hi, im getting "Bus Error" trying to read stdin into a char* variable. I just want to read whole stuff coming over stdin and put it first into a variable, then continue working on the variable. My Code is as follows: char* content; char* c; while( scanf( "%c", c)) { strcat( content, c); } fprintf( stdout, "Size: %d", strlen( content)); But somehow i always get "Bus error" returned by calling "cat test.txt | myapp", where "myapp" is the compiled code above. My question is how do i read stdin until EOF into a variable? As you see in the code, i just want to print the size of input coming over stdin, in this case it should be equal to the size of the file "test.txt". I thought just using scanf would be enough, maybe buffered way to read stdin?

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• Combine multiple dataset columns to one dataset

  - by Matt

  I have multiple datasets that I would like to combine into one. There is a common ID field that can be associated to each row. Calling Merge on the dataset will add additional rows to the dataset, but I would like to combine the additional columns. There are too many fields to do this in one query and therefore would make it unmanageable. Each individual query would be able to handle ordering to ensure the data is placed in the correct row. For Example lets say I have two queries resulting in two datasets: SELECT ID, colA, colB SELECT colC, colD The resulting dataset would look like ID colA colB colC colD 1 a b c d 2 e f g h Any ideas on ways to accomplish this?

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• Is AlarmManager.setRepeating idempotent?

  - by tardate

  In my android app, I'm setting an alarm that I want to occur repeatedly, hence using AlarmManager.setRepeating(). I don't want to keep track of whether the alarm is set myself (sounds like a bad idea that's prone to fail at some point), and there seems to be no API support for checking whether a particular alarm is already set for a given Intent. Hence, I am pessimistically resetting the alarm each time my app activates: alarmManager.cancel(pendingIntent); ... alarmManager.setRepeating(..., pendingIntent); Question: is calling setRepeating() idempotent i.e. do I need to explicitly cancel() any prior alarm or can I safely just call setRepeating() and be done with it?

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• How to unit test asynchronous APIs?

  - by Ben Clayton

  Hi all. I have installed Google Toolbox for Mac (http://code.google.com/p/google-toolbox-for-mac/) into Xcode and followed the instructions to set up unit testing found here (http://code.google.com/p/google-toolbox-for-mac/wiki/iPhoneUnitTesting). It all works great, and I can test my synchronous methods on all my objects absolutely fine. However, most of the complex APIs I actually want to test return results asynchronously via calling a method on a delegate - for example a call to a file download and update system will return immediately and then run a -fileDownloadDidComplete: method when the file finishes downloading. How would I test this as a unit test? It seems like I'd want to the testDownload function, or at least the test framework to 'wait' for fileDownloadDidComplete: method to run. Any ideas much appreciated!

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• Why would HTTP transfer via wget be faster than lftp/pget?

  - by jondahl

  I'm building software that needs to do massive amounts of file transfer via both HTTP and FTP. Often times, I get faster HTTP download with a multi-connection download accelerator like axel or lftp with pget. In some cases, I've seen 2x-3x faster file transfer using something like: axel http://example.com/somefile or lftp -e 'pget -n 5 http://example.com/somefile;quit' vs. just using wget: wget http://example.com/somefile But other times, wget is significantly faster than lftp. Strangly, this is even true even when I do lftp with get, like so: lftp -e 'pget -n 1 http://example.com/somefile;quit' I understand that downloading a file via multiple connections won't always result in a speedup, depending on how bandwidth is constrained. But: why would it be slower? Especially when calling lftp/pget with -n 1?

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• Append an object to a list in R?

  - by Nick

  If I have some R list mylist, you can append an item obj to it like so: mylist[[length(mylist)+1]] <- obj But surely there is some more compact way. When I was new at R, I tried writing append() like so: append <- function(lst, obj) { lst[[length(list)+1]] <- obj return(lst) } but of course that doesn't work due to R's call-by-name semantics (lst is effectively copied upon call, so changes to lst are not visible outside the scope of append(). I know you can do environment hacking in an R function to reach outside the scope of your function and mutate the calling environment, but that seems like a large hammer to write a simple append function. Can anyone suggest a more beautiful way of doing this? Bonus points if it works for both vectors and lists.

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• Oracle analytic functions for "the attribute from the row with the max date"

  - by tpdi

  I'm refactoring a colleague's code, and I have several cases where he's using a cursor to get "the latest row that matches some predicate": His technique is to write the join as a cursor, order it by the date field descending, open the cursor, get the first row, and close the cursor. This requires calling a cursor for each row of the result set that drives this, which is costly for many rows. I'd prefer to be able to join, but what something cheaper than a correlated subquery: select a.id_shared_by_several_rows, a.foo from audit_trail a where a.entry_date = (select max(a.entry_date) from audit_trail b where b.id_shared_by_several_rows = a.id_shared_by_several_rows ); I'm guessing that since this is a common need, there's an Oracle analytic function that does this?

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