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• R.matlab/readMat : Error in readTag(this)

  - by Megan

  I am trying to read a matlab file into R using R.matlab but am encountering this error: require(R.matlab) r <- readMat("file.mat", verbose=T) Trying to read MAT v5 file stream... Error in readTag(this) : Unknown data type. Not in range [1,19]: 18569 In addition: Warning message: In readMat5Header(this, firstFourBytes = firstFourBytes) : Unknown MAT version tag: 512. Will assume version 5. How can this issue be solved or is there an alternative way to load matlab files? I can use hdf5load but have heard this can mess with the data. Thanks!

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• Backgroundworker haults in between

  - by Dharmendra

  I am starting a process lets say abc.exe in a background worker. In the begining everything works fine but in between the newly created process i.e. abc.exe haults. Although I am starting abc.exe as hidden window but I come to know about its hang as it stopes doing log writing. When I close my UI form then again abc.exe starts working. Can anybody tell me what could be the possible cause for this? I am not able to debug the issue as it can happen at any time, I can not replicate it. Please tell me as it is very urgent for me. If some more info is required then please revert back.

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• R problems using rpart with 4000 records and 13 attributes

  - by josh

  I have attempted to email the author of this package without success, just wondering if anybody else has experienced this. I am having an using rpart on 4000 rows of data with 13 attributes. I can run the same test on 300 rows of the same data with no issue. When I run on 4000 rows, Rgui.exe runs consistently at 50% cpu and the UI hangs.... it will stay like this for at least 4-5hours if I let it run, and never exit or become responsive. here is the code I am using both on the 300 and 4000 size subset : train<-read.csv("input.csv",header=T) y<-train[,18] x<-train[,3:17] library(rpart) fit<-rpart(y~.,x) Is this a known limitation of rpart, am I doing something wrong? potential workarounds? any assistance appreciated

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• How to handle ViewData type casting in MVC

  - by Wondering

  Hi All, I am new to MVC and facing one issue. I have a xml file and i am retrieving its value using Linq to xml and assigning it to ViewData. Controller.cs var res=from x in doc.Descendants("person") select new { Fname=x.Element("fname").Value, Lname=x.Element("lname").Value }; ViewData["Persons"]=res; in View I am trying <% foreach (var item in ViewData["Persons"]) { %> <li> <%= item.Fname %> </li> <% } %> but foreach (var item in ViewData["Persons"] is giving type casting error..what should be the exact type csting so that i can retrive values in the format item.Fname. Thanks.

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• How to deal with multiple Facebook requests simultaneously

  - by Peter Warbo

  I'm using the Facebook SDK for my app. I have created a singleton class FacebookHelper to deal with all Facebook related logic. Whenever I make a Facebook request (i.e download friends) I set an enum i.e FacebookRequestDownloadFriends so that FacebookHelper knows how to handle errors and success for that request (since handling can be different between the different requests) This solution has worked out fine until now, because now I'm doing 2 Facebook Requests at the same time so when I set the enum for the first request i.e FacebookRequestDownloadFriends and then it will be overwritten just shortly with another request FacebookRequestDownloadEvents, so there will be confusion obviously. How can I deal with this issue without having to refactor too much code?

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• Unable to return large result set ORA-22814

  - by rvenugopal

  Hello All I am encountering an issue when I am trying to load a large result set using a range query in Oracle 10g. When I try a smaller range (1 to 100), it works but when I try a larger range(1 and 1000), I get the following error "ORA-22814: attribute or element value is larger than specified in type" error. I have a basic UDT (PostComments_Type) and I have tried using both a VArray and a Table type of PostComments_Type but that hasn't made a difference. Your help is appreciated --Thanks Venu PROCEDURE RangeLoad ( floorId IN NUMBER, ceilingId IN NUMBER, o_PostComments_LARGE_COLL_TYPE OUT PostComments_LARGE_COLL_TYPE -- Tried using as VArray and also Table type of PostComments_Type )IS BEGIN SELECT PostComments_TYPE ( PostComments_ID, ... ) BULK COLLECT INTO o_PostComments_LARGE_COLL_TYPE ------------This is for VARRAY/Table Type. So bulk operation FROM PostComments WHERE PostComments_ID BETWEEN floorId And ceilingId; END RangeLoad;

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• Best practice for near reuse of model components?

  - by Chris Knight

  I have a requirement to use a Fund model in my code. It will contain a fund name and fund code. In the interest of reuse I've poked around the package containing the other models used and found an existing Fund model. However the issue here is that, in addition to fund name and code, it also contains an amount. Amount isn't directly relevant in my context. So, do I: 1) Use the existing Fund model as is, ignoring the setters/getters for fund amount. 2) Put a FundDescription interface onto the existing Fund model for accessing only the information I'm interested in. 3) Make a FundDescription base class from which the existing Fund model could now extend 4) Create a whole new seperate model since the two are slightly contextually different

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• gdb + nasm debug info not being created

  - by cpowel2

  I am relatively new to assembly language programming and am trying to debug a small .asm file that I wrote in Ubuntu. I am however running into an issue where my symbol table is not being loaded and was looking for some help. I am compiling my program as follows. nasm -f elf -g -F dwarf bs.asm gcc -m32 -g bs.o -o bs which produces the executable bs when I run gdb bs I get a message that says no debugging symbols and when I try to set a break point by b main it says function not defined even though its in the file and I can run it using ./bs I read a couple posts that suggested adding the -F dwarf when assembling but that didn't help if anyone has any insight I would greatly appreciated your input. Thanks in advance

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• Android Dropdown (Select) CSS

  - by roguepixel

  I'm currently writing some stylesheets for mobile browsers and have come across a strange issue in the Android browser. When changing the font-size CSS attribute of a text box the box gets bigger to accomodate the larger text. Doing this on a select box however does not change the size of the select box, but the text still gets larger (actually overlapping the top and bottom of the rendered form element). Can anyone tell me if it's possible to increase the height of select boxes in the Android browser. Or if not point me in the direction of a list of CSS attributes that can be applied to them. Thanks.

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• What is a valid and reasonable alternative to a massive storage approach?

  - by Backo

  I am using Ruby on Rails 3.2.2 and MySQL. After my previous question on "how to handle massive storage of records in database for user authorization purposes", since related answers (on how to solve the issue or how to accomplish to that I am looking for) aren't sufficiently detailed or require to much resources (at least for me), I would like to know what are valid and reasonable alternatives to that approach. In few words, this question could be phrase as: how to handle "complex" (at level of SQL querying) user authorizations when you have to fetch "authorized" records? That is, for example, how to retrieve records when you would use code like the following (the following code would be used mostly in index controller actions): Article.readable_by_user(@current_user) # => Returns all articles readable by the current user.

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• String Storage and Retrieval in Android

  - by dweebsonduty

  I have a program that has items with 3 attributes. Name(String) : Count(String) : Amount(String) Currently I am writing the database when someone is trying to access a section then reading from the database. The writing is taking too long. So my question is how can I perhaps create a nested array where I can say if name = carrot then print carrot['count'] and carrot['amount']. I am very new to Java so some sample code would be great. Or any other suggestions that you may have as far as tackling this issue.

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• How do I resize a flat vector icon so that it preserves hard edges in Photoshop (CS4)

  - by Adam Singer

  I recently purchased Drew Wilson's Pictos icon library. It is a library of flat, monochromatic icons for use on the web and elsewhere. The only issue is: they're vectors. I know my way around Illustrator a little bit, but ultimately I want to import these icons into Photoshop and resize to various dimensions. The problem I'm having: when I import an icon and resize it to, say, 20x20 pixels, I notice that there is a fair bit of aliasing around the edges of the icon. I'm sure there is some magic number where the edges of these icons will remain crisp, but I can't find any option or setting that will allow me to size these icons properly. Is there a way in Photoshop to snap these icons to the closest size that removes or minimizes the aliasing?

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• Fallback to another existing MIME type when the required is missing in Rails

  - by fifigyuri

  I want to extend the existing supported HTML type of my site by support for iPhone. For this I registered a new MIME type. I created a layout for iphone and also converted some of the html views to iphone version. However, I did not convert all of the html.erb files. I do not see the reason to convert all views, some of them should not change, some partials simply just remain the same. I guess there should be a solution for this case. I tried to search for ways how to fallback to an existing format, but did not find any answer. Does a way to define fallback for MIME types in Rails exist? How does it work? If it doesn't exist and thus I wanted to solve the issue not the right way, what could simply solve the task of extending an existing site by another format? Thanks for your suggestions.

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• SQlite/Firebird: Does any of them support multiple concurrent write access ?

  - by Quandary

  Question: I currently store ASP.net application data in XML files. Now the problem is I have asynchronous operations, which means I ran into the problem of simultanous write access on a XML file... Now, I'm considering moving to an embedded database to solve the issue. I'm currently considering SQlite and embeddable Firebird. I'm not sure however if SQlite or Firebird can handle multiple concurrent write access. And I certainly don't want the same problem again. Anybody knows ? SQlite certainly is better known, but which one is better - SQlite or Firebird ? I tend to say Firebird, but I don't really know. No MS-Access or MS-SQL-express recommodations please, I'm a sane person.

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• Managing memory of polymorphic timed events with DLL

  - by Milo

  Here is my issue. My Gui library that I made supports timed events. Basically, I have a class called TimedEvent which users inherit from. They then do: addTimedEvent(new DerivedTimedEvent(...)); However given the nature of timed events, I manage the memory afterwards. So when the timed event has done its thing, my library calls delete on it. Although it runs fine, that is because the exe and the library were both built with msvc 2008. I think I might have trouble if I have 2 versions of the runtime, one for the lib, and one for the exe. What can I do to fix this? I can't create a factory because the derived type is on the exe side of things. I also cannot ask the user to call delete since they might not have a way to keep track of time, or know if the event was delayed for whatever reason. Thanks

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• Not able to get the data from the JSON in OpenSocial App!

  - by Abhishek

  I have follwing JSON: {"mykey":[{name:"Jak",interests:"movies"}]} and following opensocial app code: <script type="text/os-template" require="mykey"> <ul> <li repeat="${mykey}"> <span>Offer id: ${Cur.name}</span> <span>Offer: ${Cur.interests}</span> </li> </ul> </script> but the App is not able to get the data from the JSON? Not able to find out the issue!

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• Android: Touch seriously slowing my application

  - by Jason Rogers

  Hi all, I've been raking my brains on this one for a while. when I'm running my application (opengl game) eveyrthing goes fine but when I touch the screen my application slows down quite seriously (not noticeable on powerful phones like the nexus one, but on the htc magic it gets quite annoying). I did a trace and found out that the touch events seem to be handled in a different thread and even if it doesn't take so much processing time I think androids ability to switch between threads is not so good... What is the best way to handle touch when speed is an issue ? Currently I'm using : in the GLSurfaceView @Override public boolean onTouchEvent(MotionEvent event) { GameHandler.onTouchEvent(event); return true; } Any ideas are welcome

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• Facebook connect access_token

  - by Guillaume Santacruz

  Hi i ve got the same issue than this guy: Acces token from facebook is not retrived for sign up? access_token (trying to get propert of non object ) Apparently he found a solution but I do not clearly understand it. Just need you help to understand what should i do. Problem is access_token trying to get property of a non object when i try to log in with facebook connect. the solution I don't understand is this one. "Its was an database error due to session have not created due to facebook app not live."

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• browser showing half progress bar even after page is fully rendered

  - by Rama

  Hi, what could be the reason if browser is showing progress bar (stuck at half) as if it is still trying to load something, even after the page is rendered. this is an intranet ASP.NET website. how can I find out the reason? the browser is IE8. actually this started after the browser is upgraded from IE6 to IE8. not sure if this issue has anything to do with browser upgrade. will the tools like Fiddler can help to find out what it is still trying to load? thanks in advance.

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• Put specific tds from a table row into edit using jQuery (then update w/ ajax)

  - by bbqsauced

  I'm somewhat new to jQuery, so I could use some help here. This is my issue: I have a php script outputting a dynamic table. Each row has an "edit" button, plus some other fields. Only 3 of those need to be turned into an input box. The edit button should only put that specific row into "edit mode." I got as far as assigning each row a unique class by adding a number to the end of it. I have been able to use jQuery to change all of the rows into edit mode, but I need it to be specific to a row. An example row would have classes like name0, price0, and desc0. The next row would go on to classes name1, price1, and desc1 (for the fields that need changed). How can I reference these values and pass them to jQuery so it processes an event on just those elements?

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• PHPUnit test for error thrown with wrong argument type

  - by Spencer Mark

  I'm just starting with PHPUnit and am ok with all assert* methods, but can't figure out how to test for error thrown when the wrong argument is provided to the method - say hinted with array like so: public function(array $list) { } and then tested with null as argument. Could someone please provide an example of how to test for this sort of errors? I've checked quite a few posts on stackoverflow, but couldn't find the answer to this specific issue. Edit Ok - just to give you an idea of what I'm testing - here's the ArrayHelper::removeIfValueIsEmpty() method: public static function removeIfValueIsEmpty(array $array) { if (empty($array)) { return array(); } return array_filter($array, function($value) { return !Helper::isEmpty($value); }); } and now test: class ArrayHelperTest extends PHPUnit_Framework_TestCase { public function testRemoveIfValueIsEmpty() { $this->assertEmpty( \Cmd\Helper\ArrayHelper::removeIfValueIsEmpty(null), '\Cmd\Helper\ArrayHelper::removeIfValueIsEmpty method failed (checking with null as argument)' ); } } This throws an error: PHPUnit_Framework_Error : Argument 1 passed to Cmd\Helper\ArrayHelper::removeIfValueIsEmpty() must be of the type array, null given

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• How to reduce the lag time when using jquery to modify css onload

  - by Josh

  I have a jquery function that is called on $(document).ready that modifies the css of a Business Intelligence dashboard. I had to use jquery to make the adjustments because I do not have access to the source code of the BI tool. What happens is when the page loads, I run through the tab navigation and change the colors of the tabs based on certain requirements (which is basically dependent on the text of the tab). The issue I am facing is that there is a small lag time from when the page initially loads to when the jquery updates have been made to the page. Is there a way to reduce this lag time?

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• How determine application subsystem from executable file

  - by Luca

  I'm trying to detect console application from the list of the executables files installed on my computer. How to implement it? Every application has a "subsystem" (windows application, console application or library; specified to the linker as option, I think). How to detect it using only the executable file? Are there alternative methods to detect the application characteristic? Additionally, are there any method for detecting the file is a really executable file? Any issue for JAR executables?

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• How to extract tags from XML

  - by uku

  Hi, I have a simple XML extraction issue that should be solvable with straight PHP and not require any libraries. All I need to do is extract the values of one tag. For example, given the string of XML: <ResultSet xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" ....> <Result>Foo</Result> <Result>Bar</Result> </ResultSet> I just need to put Foo and Bar in an array. What is the easiest way to do this? Thanks!

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• How to handle "100 continue" HTTP message ?

  - by Stephane

  Hello, I'm writing a simplistic HTTP server that will accept PUT requests mostly from cURL as client and I'm having a bit of an issue with handling the "Expect: 100-continue" header. As I understand it, the server is supposed to read the header, send back a "HTTP/1.1 100 Continue" response on the connection, read the stream up to the value on "Content-Length" and then send back the real response code (Usually "HTTP/1.1 200 OK" but any other valid HTTP answer should do). Well, that's exactly what my server does. The problem is that, apparently, if I send a "100 Continue" answer, cURL fails to report any subsequent HTTP error code and assumes the upload was a success. For instance, if the upload is rejected due to the nature of the content (there is a basic data check happening), I want the calling client to detect the problem and act accordingly. Am I missing something obvious ? Thanks

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