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• linear interpolation on 8bit microcontroller

  - by JB

  I need to do a linear interpolation over time between two values on an 8 bit PIC microcontroller (Specifically 16F627A but that shouldn't matter) using PIC assembly language. Although I'm looking for an algorithm here as much as actual code. I need to take an 8 bit starting value, an 8 bit ending value and a position between the two (Currently represented as an 8 bit number 0-255 where 0 means the output should be the starting value and 255 means it should be the final value but that can change if there is a better way to represent this) and calculate the interpolated value. Now PIC doesn't have a divide instruction so I could code up a general purpose divide routine and effectivly calculate (B-A)/(x/255)+A at each step but I feel there is probably a much better way to do this on a microcontroller than the way I'd do it on a PC in c++ Has anyone got any suggestions for implementing this efficiently on this hardware?

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• Spring Security 3.0 and Active Directory LDAP: DOMAIN\user login

  - by Bernd Haug

  I would like to have users authenticate against an ActiveDirectory LDAP server using the DOMAIN\user.name syntax. I think that should be possible with SpringSec 3.0 since the docs mention an "alternative syntax" which I guess refers to the DOM\user syntax instead of a bind DN, but the docs don't elaborate further. Is there some way to configure Spring Sec 3 LDAP to use "the MS way" or do I have to write my own Authenticator implementation (against e.g. the java.naming.directory package, which I've tested to be able to use the MS syntax as its SECURITY_PRINCIPAL)?

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• How to create playable FLV video from part of FLV file using FFMPEG?

  - by Ole Jak

  So we had real FLV video file. we had devided it into 3 parts (more or less equal, not looking into structure orcontext). We have taken second part and forgot about first 2. Video contained audio and video track. mp3 and on vp6. Is it any how possible to play thsat second part after sending to ffmpeg some command? So how to (using any FFMPEG API (in general in any programming language) or using command line) turn bytearray into playable video? (knowing what format video was created in and some other data like used codecs )

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• MinGW GCJ libiconv path problem

  - by Hussain

  I'm having a problem with the MinGW implementation of GCJ. I read that you have to install libiconv before you can use it. However, the documentation wasn't very specific, and it did not say where to extract the binaries and developer files (libiconv-bin and libiconv-lib). I have tried the following paths: $p = c:\mingw $p\libiconv-1.9.2-1-[bin|lib]\ $p\libiconv-[bin|lib]\ $p\mingw32\libiconv-1.9.2-1-[bin|lib] $p\mingw32[bin|lib]\libiconv $p\mingw[bin|lib]\liconv $p\bin\libiconv-1.9.2-1-[bin|lib] $p\bin\libiconv-[bin|lib] None of these work. Any help on where I'm supposed to put the libiconv files?

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• Superfluous python parameters

  - by Leif Andersen

  I've noticed a discrepancy in the way that python parameters are called. In every other language I've dealt with, you either have foo() meaning either no parameters, or as many parameters as you like, or foo(arg1, arg2,...,argn) where you pass in the same number of parameters to define the function and call it. In python however, I've noticed that the function definitions, and when the function is called, can have two different parameters sets, this usually consists of: class foo(object): def bar(self, arg1, arg2): pass However, when I want to call the function, all I have to do is: zoo = foo() zoo.bar(arg1, arg2) Where did the self parameter go? Thank you.

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• Labeling connections using Oracle Universal Connection Pool (UCP) doesn't seem to work

  - by sapporo

  I'm evaluating the Oracle Universal Connection Pool (UCP) included with their 11.2 JDBC driver, but cannot get the labeling functionality to work properly (which I'd like to use to minimize the amount of ALTER SESSION statements). I'm basically following their sample code to implement the ConnectionLabelingCallback interface. The callback method cost(Properties reqLabels, Properties currentLabels) is called as expected, so the callback seems to be configured correctly. However, the other callback method configure(Properties reqLabels, Object conn) is passed arguments that make it impossible to provide a meaningful implementation: reqLabels is always null, so the callback method has no way of knowing what labels need to be set. conn is of type oracle.jdbc.driver.T4CConnection, which cannot be cast to LabelableConnection, so the callback method has no way of inspecting or manipulating the labels attached to the connection. My code is running on Java 6 and using ojdbc6.jar and ucp.jar version 11.2.0.1.0. The database is actually 10.2, but that should not be a problem according to the docs, since the UCP functionality is completely implemented in the JDBC driver. Thanks in advance!

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• Commands to compile programs using .NET

  - by Arjun Vasudevan

  In case I have .NET framework installed in my computer + all the necessary other language support (Perl Interpreter, etc) What are the commands I should give in the console to compile programs in the following languages: 1. C 2. C++ 3. Java 4. Python 5. VB 6. C# 7. Perl 8. Ruby Like we have for VB- *vbc program_name.vb*, what are the commands to compile programs in other languages?

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• What web-development platform should I use considering Time-To-Market?

  - by Jonas

  I have been looking at a few differend platforms for my coming web-development project. I would like to hear what web-development platform is recommended when considering Time-To-Maket. Suppose that I already know the programming language well, but not the web-framework. The OS will be Linux. My requirements and priorities: Time-To-Market RESTful Maintainable code Scales-up (not dog-slow) The one I have looked at but never used are: Java and Play! Framework or GWT Python and Django PHP and Zend Framework Ruby and Ruby on Rails Erlang and Nitrogen and Webmachine Scala and Lift C++ and Wt C# and ASP.NET Mono It's a bonus if the framework has support for making sites for mobile phones.

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• Combining a one-to-one relationship into one object in Fluent NHibernate

  - by Mike C.

  I have a one-to-one relationship in my database, and I'd like to just combine that into one object in Fluent NHibernate. The specific tables I am talking about are the aspnet_Users and aspnet_Membership tables from the default ASP.NET Membership implementation. I'd like to combine those into one simple User object and only get the fields I want. I would also like to make this read-only, as I want to use the built-in ASP.NET Membership API to modify. I simply want to take advantage of lazy-loading. Any help would be appreciated. Thanks!

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• Is there any difference between null and 0 when assigning to pointers in unsafe code?

  - by Eloff

  This may seem odd, but in C (size_t)(void*)0 == 0 is not guaranteed by the language spec. Compilers are allowed to use any value they want for null (although they almost always use 0.) In C#, you can assign null or (T*)0 to a pointer in unsafe code. Is there any difference? (long)(void*)0 == 0 (guaranteed or not? put another way: IntPtr.Zero.ToInt64() == 0) MSDN has this to say about IntPtr.Zero: "The value of this field is not equivalent to null." Well if you want to be compatible with C code, that makes a lot of sense - it'd be worthless for interop if it didn't convert to a C null pointer. But I want to know if IntPtr.Zero.ToInt64() == 0 which may be possible, even if internally IntPtr.Zero is some other value (the CLR may or may not convert null to 0 in the cast operation) Not a duplicate of this question

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• Apache CXF 2.0.12 to 2.2.7 upgrade issue

  - by FkYkko

  I have upgraded a CXF web service implementation from Apache CXF 2.0.12 to 2.2.7 and now I can't connect from a remote computer. http://localhost:9000/Data?wsdl works on the installed computer. http://computername:9000/Data?wsdl from a remote computer does not work anymore (worked before upgrade). The service is configured in code (no configuration files) with the following code: DataServiceImpl dataImplementor = new DataServiceImpl(); JaxWsServerFactoryBean svrFactory = new JaxWsServerFactoryBean(); svrFactory.setServiceClass(DataServiceImpl.class); svrFactory.setAddress("http://localhost:9000/Data"); svrFactory.setServiceBean(dataImplementor); if(intercept) { svrFactory.getInInterceptors().add(new LoggingInInterceptor()); svrFactory.getOutInterceptors().add(new LoggingOutInterceptor()); } svrFactory.create(); Is there anything in the configuration which defines "Allowed clients" or something like that?

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• learning OO with PHP

  - by dole doug

  Hi there I've started to learn OO programming, but using the PHP language with the help of the "PHP 5 Objects, Patterns, and Practice" book. The thing is that I wish to learn to use into same time the CakePHP framework which make use a lot of the MVC pattern. Because I don't know much about OO and less about MVC I wish to understand the later one but assumptions I make with my OO knowledges might have bad impact on long term. Does anyone know a good tutorial about what means MVC (more than cakephp manual says about it, but more easy to read/understand than wikipedia)? TY

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• How to use mock and verify methods of OCMock in objective-C ? Is there any good tutorial on OCMock i

  - by san

  My problem is I am getting an error: OCMckObject[NSNumberFormatter]: expected method was not invoked:setAllowsFloats:YES I have written following Code: (void) testReturnStringFromNumber { id mockFormatter = [OCMockObject mockForClass:[NSNumberFormatter class]]; StringNumber *testObject = [[StringNumber alloc] init]; [[mockFormatter expect] setAllowsFloats:YES]; [testObject returnStringFromNumber:80.23456]; [mockFormatter verify]; } @implementation StringNumber - (NSString *) returnStringFromNumber:(float)num { NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init]; [formatter setAllowsFloats:YES]; NSString *str= [formatter stringFromNumber:[NSNumber numberWithFloat:num]]; [formatter release]; return str; } @end

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• PyPy -- How can it possible beat CPython?

  - by Vulcan Eager

  From the Google Open Source Blog: PyPy is a reimplementation of Python in Python, using advanced techniques to try to attain better performance than CPython. Many years of hard work have finally paid off. Our speed results often beat CPython, ranging from being slightly slower, to speedups of up to 2x on real application code, to speedups of up to 10x on small benchmarks. How is this possible? Which Python implementation was used to implement PyPy? CPython? And what are the chances of a PyPyPy or PyPyPyPy beating their score? (On a related note... why would anyone try something like this?)

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• Multiple delivery confirmations per message with Ruby SMPP

  - by Santiago Palladino

  I am using the ruby smpp library to send/receive SMS. Right now we are sending messages to two different servers, using the ruby-smpp library. One of them works perfectly, but the other one sends multiple DELIVRD confirmations for each messages. And by multiple I mean hundreds of confirmations per message in some cases. Does anyone know any possible reason behind this? I am thinking on something relative to the implementation of the protocol the company is using, since it works perfectly with the other one, and not on the lines of a bug in the specific smpp ruby library. We are using smpp v3.4.

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• Need advice on speeding up tableViewCell photo loading performance

  - by ambertch

  I have around 20 tableview cells that each contain a number (2-5) thumbnail sized pictures (they are VERY small Facebook profile pictures, ex. http://profile.ak.fbcdn.net/hprofile-ak-sf2p/hs254.snc3/23133_201668_2989_q.jpg). Each picture is an UIImageView added to the cell's contentview. Scrolling performance is poor, and measuring the draw time I've found the UIImage rendering is the bottleneck. I've researched/thought of some solutions but as I am new to iphone development I am not sure which strategy to pursue: preload all the images and retrieve them from disk instead of URL when drawing cells (I'm not sure if cell drawing will still be slow, so I want to hold off on the time investment here) Have the cells display a placeholder image from disk, while the picture is asynchronously loaded (this seems to be the best solution, but I'm currently not sure exactly how to do best do this) There's the fast drawing recommendation from Tweetie, but I don't know that will have much affect if it turns out my overhead is in network loading (http://blog.atebits.com/2008/12/fast-scrolling-in-tweetie-with-uitableview/) Thoughts/implementation advice? Thanks!

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• [Programming General] Advantages of using software framework

  - by ignatius

  Hello, I was reading these days about large projects implementation in python and Flex, and very often people praise the use of framework (like Cairngorm, PureMVC or others) over traditional OOP coding. I think i dont really understand the advantage of using FW, which is the strong point over classic programming? how big should be the project in order to use FW? it is intended mainly for web-applications? or can be used for desktop apps as well? hope, all these doubts dont sound stupid to you, i am not Computer engineer, just electronic, so my knowledge of sw architecture is very limited. Br

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• How to get default Ctrl+Tab functionality in WinForms MDI app when hosting WPF UserControls

  - by jpierson

  I have a WinForms based app with traditional MDI implementation within it except that I'm hosting WPF based UserControls via the ElementHost control as the main content for each of my MDI children. This is the solution recommended by Microsoft for achieving MDI with WPF although there are various side effects unfortunately. One of which is that my Ctrl+Tab functionality for tab switching between each MDI child is gone because the tab key seems to be swallowed up by the WPF controls. Is there a simple solution to this that will let the Ctrl+tab key sequences reach my WinForms MDI parent so that I can get the built-in tab switching functionality?

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• KSoap2 list handling - is this the correct way?

  - by oozoo

  Hello, ksoap-newbie here I have a basic soap service running on glassfish, that returns List<String> like this <?xml version="1.0" encoding="UTF-8"?> <S:Envelope xmlns:S="http://schemas.xmlsoap.org/soap/envelope/"> <S:Body> <ns2:getNamesResponse xmlns:ns2="http://namespace/"> <return>Name1</return> <return>Name2</return> </ns2:getNamesResponse> </S:Body> </S:Envelope> now in ksoap2 (android) I have to iterate the soap-object properties to get my list back: SoapObject result = (SoapObject) envelope.bodyIn; for(int i=0;i<result.getPropertyCount();i++) { list.add(result.getProperty(i)); } is there a better way? I couldn't find any class mapper in my implementation. thanks in advance

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• How do I position an element so that it acts like both 'absolutely' & 'relatively' positioned at the same time? - CSS

  - by marcamillion

  You can see the implementation here: http://jsfiddle.net/BMWZd/25/ When you click on one of the names in Box#1, you will see the circle in the top left corner of the box move up and down. How do I stop that? While also, making sure that it shows in the top left corner of each of the boxes on all browser sizes? So position:absolute will keep it in one place regardless of what happens around it. But it won't put it in the exact same position (relatively) on diff browser sizes. But position:relative will. How do I get the best of both worlds?

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• how to set flex combobox cursor position

  - by crazy horse

  I have a combobox implementation as follows - Based on user input (min 2 chars) in the editable combobox, the data provider is refreshed and drop-down opened, showing different data sets as user input varies. Problem is that after drop-down opens, the cursor moves back to the beginning. So for instance, the user types in "ab", and wants to type in "c" to form the search string "abc". Due to the cursor re-setting its position to 0, the search string instead ends up as "cab". Here's what I tried already (doesn't work) : textInput.mx_internal::getTextField().setSelection(index, index); where index = length of user input. This selects text from index to index (which effectively un-selects text) and is supposed to place the cursor at the end. Any thoughts?

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• Python - Check if numbers in list are factors of a number

  - by Zach

  Hey, I have a list of numbers (integers) (say, from 1 to 10). They're not necessarily consecutive, but they are in ascending order. I've prompted the user multiple times to enter a choice of the available numbers. When that number is entered, it is removed from the list along with any of its factors that may be there. I've prevented the user from selecting prime numbers. However, at some point in time, there may be non-prime numbers there, which have no factors remaining. I'm relatively new to Python, so I'm having trouble implementing: Checking if the number selected has no factors remaining (even if it is not prime). Checking if only prime numbers remain, or numbers without factors. I'm thinking of using for statements, but I'm not sure exactly how to implement them. Can anyone offer advice, or code? Thanks in advance... PS. In case anyone's wondering, I'm doing an implementation of the game of Taxman in Python.

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• Needed list of special characters classification with respective characters

  - by pravin

  I am working on one web application , It's related to machine translation support i.e. which takes source text for translation and translated in to user specified language Currently it's in unit testing phase. Here, i want to check that, whether my machine translation feature is fully working for all the special characters. Because of different test cases I stuck at one point where i need all the special characters with classification. I needed all the special characters listing with classification. e.g. 1st : class name : Punctuation Characters : !?,"| etc test cases : segment1? segment2! segment3. 2nd : Class name : HTML entities characters : all the characters which belong under this class test cases : respective test cases 3rd : Class name : Extended ASCII characters :all the characters which belong under this class test cases : respective test cases Please folks provide this, if anyone has any idea or links so that i can make product perfect Thanks a lot

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• jQuery/AJAX type-ahead/auto-complete

  - by Prasad

  I have read several articles/questions/forums discussing the best auto-complete plugin for jQuery. After trying several good ones, I've realized a flaw in most. If you are looking up countries and type 'In', a couple of countries show up. If you continue typing I-n-d-i-a, this results in 5 AJAX calls (see http://www.freeimagehosting.net/uploads/6f1bcd69e1.png) its quite natural that India is a subset of In, so why call again? We need to simply filter the retrieved list client-side. Anyone knows about such an implementation? What is the status of the Jquery Autocomplete feature? I read at StackOverflow that it is no longer available with Jquery; but the Jquery website has a 'New' mark besides the link to Autocomplete. Thanks

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• Libreoffice Calc run macro with HYPERLINK

  - by Kurt Borno

  I'm trying to use hyperlinks instead of buttons to run Basic macros. It seems to be more natural to me because hyperlinks are directly connected to a cell and buttons are not. I'm using the following Formula: =HYPERLINK("vnd.sun.star.script:Standard.Module1.Test?language=Basic&location=document";"Check") It should call the Subroutine Test placed in the document's macros under Standard.Module1 and display the Text 'Check' in the Cell it is written. This works absolutely fine with libreoffice 3.6.1.2 but it doesn't work at all with version 4.1.4.2. I can't see any errors it just happens nothing at all. I tried to simply click the Hyperlink and also to hold CTRL and click it. Same result - nothing. When I use a button the macro works as expected. Does anyone know how to solve this problem?

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