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• Implementing In App purchases in Android?

  - by hgpc

  It looks like Android won't natively support in-app purchases for a while, and when it does there might be a huge user base with devices that don't support them. What's the best way to implement iPhone-like (additional content or services) in-app purchases in Android using the Android Market if possible? The solution should consider in particular: For all kinds of in-app purchases: Android Market's 24-hour cancellation policy For consumables/non-consumables: storage of additional content (ie: use precious application memory to avoid piracy, or use SD card to avoid bloating application memory) Thanks!

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• where is POST params for WCF REST

  - by Costa

  Hi Can u put some code sample to get Post parameters sent by client to WCF REST webservice. The request is though a HttpWebRequest. The client will not serialize anything if I will request a certain XML format from PHP programmer, how to make WCF convert this XML to one parameter. currently I am trying to send the request like this and I am stuck HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create("http://100.100.1.4000:2805/Something.svc/Bomba/Data.php"); request.ContentType = "text/xml"; request.Method = "POST"; StreamWriter stream = new StreamWriter(request.GetRequestStream()); { stream.Write("FirstName=0&LastName=2"); } request.GetResponse(); stream.Close(); Thanks

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• Python editor/IDE for OS X

  - by TheJuice

  As a (reasonably) new Python programmer, what IDEs or editors would you recommend for Python programming on OS X and why (i.e. what features/capabilities/workflow techniques really help)? I've used Xcode and played a bit with TextMate but I can't really say that either have really hit the spot for me (although TextMate's code completion is pretty neat, I think i've been spoilt with code-completion facilities provided by editors for statically-typed languages so maybe i'm subconsciously comparing apples and oranges) I'm looking to increase my efficacy with Python and any tips would be appreciated. I know people have asked similar questions for Python IDEs in general but I am specifically concentrating on OS X and the 'Mac way'. If Xcode or TextMate are thought highly of, perhaps some suggestions as to how I could get the most benefit from the tools would help.

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• C++ Typing and OOP child classes

  - by Zack

  I'm a bit confused: If I have a base class A, and a class B which extends A, can a variable of the type A hold a value of the type B and vice versa? If yes, why? Aren't they completely different even if B is derived from A? How about type-safety? If this is possible, what things do I have to mind when taking use of this? How would this work out in terms of performance? Note: Sorry if I asked too many questions, just ignore them and just look out for those "marked" with the list decoration dot :) Also, this is not my homework. I'm a hobby programmer and have skills in scripting languages with OOP, yet I'm relatively new to OOP typing in C++.

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• How to Call methods I see in a wsdl file someone linked me to?

  - by Derek

  Hi all, I am not a Java programmer by trade. C and Fortran mostly. However, I have this one-off project someone wants done. Connect to some web-based database and retrieve some data from it. I asked around, and someone finally linked me to a WSDL page. I click on this link, and I see a huge XML looking file. If I am writing a stand-alone java application, how do I go about calling these (promising looking) method names that I see in the wsdl. You know "getCoordinates" is there, but i have no idea how to call that method. After googling, I am finding a lot of different ways, and I am not sure what is the best way for my simple application. Thanks

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• Android: building different versions of my app (free, premium, etc.) with Eclipse

  - by Stefan Klumpp

  With my current code base I'd like to build two or more different versions of my Android app (free, premium, ...). For the iPhone (XCode) I can definte different targets. Is there something similar implemented in Eclipse?

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• Parse JSON with R

  - by Btibert3

  I am fairly new to R, but the more use it, the more I see how powerful it really is over SAS or SPSS. Just one of the major benefits, as I see them, is the ability to get and analyze data from the web. I imagine this is possible (and maybe even straightforward), but I am looking to parse JSON data that is publicly available on the web. I am not programmer by any stretch, so any help and instruction you can provide will be greatly appreciated. Even if you point me to a basic working example, I probably can work through it.

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• How to convince a colleague that code duplication is bad?

  - by vitaut

  A colleague of mine was implementing a new feature in a project we work on together and he did it by taking a file containing the implementation of a similar feature from the same project, creating a copy of it renaming all the global declarations and slightly modifying the implementation. So we ended up with two large files that are almost identical apart from renaming. I tried to explain that it makes our project more difficult to maintain but he doesn't want to change anything saying that it is easier for him to program in such way and that there is no reason to fix the code if it "ain't broke". How can I convince him that such code duplication is a bad thing? It is related to this questions, but I am more interested in the answers targeted to a technical person (another programmer), for example a reference to an authoritative source like a book would be great. I have already tried simple arguments and haven't succeeded.

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• Checkout Control Panel that updates pricing???

  - by Stefan

  Hello all, my first post here. I am not much of a programmer, I can tailor some things for my personal needs but thats about it. I am looking for a script (jQuery preferred I suppose) which is easy to incorporate and bind to a few DIVs to be updated dynamically. Nothing too deep, just something that can updated price at check-out... Could I get some recommendations on a solid and simple widget for this? I appreciate any help/suggestions!

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• An Attitude of Programming Gratitude

  - by DonnyD

  A few years ago, I felt privileged to be involved in a mature open-source project where my salary was paid by a government research grant. As it turned out, I was ill-equipped for this three-month contract which included some very stressful network support in a medical setting and, to add to that, the project was poorly managed with poor lines of communication. My dream job had suddenly become a nightmare. Never, in my experience, though, did I learn as much about programming in as short a period of time. Psychologically, the only way through this episode in my life was for me to actively look for the good in things and focus on my love of programming. What role has gratitude played in your life as a programmer?

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• What wiki tools exist to generate shippable user doc from a wiki?

  - by tletnes

  I am looking into using a wiki (prefer mediawiki, but not a req.) as the repository for developer generated documentation (User Guides, Release Notes, Application Notes, Errata, etc.) from a collaborative/easy-to-update point of view a wiki seems like a good match, however since this documentation will ultimately ship to customers we want to be able to export the documents in their final state (e.g. during the release cycle) to static versions that no longer include histories. Ideally the export would leave the document n a form where errors could be easily fixed by a non-programmer It would be good if niceties like section ordering and table of contents were available, or easy to add after the fact. Are any tools with features like these avalible?

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• Show and Fade UIImageView after 2 Seconds

  - by user1536432

  I am working on a notification system in my iPhone game and want an image to pop up on the screen and automatically fade after 2 seconds. User clicks a button that calls the method "popupImage" An image appears on the screen in a designated spot, it doesn't need to fade in The image fades out by itself after being on the screen for 2 seconds. Is there any way of doing this? Thanks ahead of time.

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• MvvmCross experiences, hindsight, limitations?

  - by Jason Steele

  I am considering using the MvvmCross framework for a cross platform mobile application that will target Android, iPhone and WP7. Does anyone have any experience with this framework they would like to share, and are they aware of any constraints or limitations that it would be useful to be aware of? For example, am I still able to use native page transitions of my choosing? Are there any performance or storage (app size) implications?

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• WYSIWYG View Editor in 'Android'?

  - by user262122

  Duplicate: Is there any form designer available for Google Android? I would like to move a CheckBox, so it displays in a different location than the top-left corner under Absolute Layout inside main.xml, for 'Android'. I'm using Eclipse to edit my views. How would I do this? On an iPhone they have a tool called Interface builder that allows you to move things in a WYIWYG fashion. Does Eclipse have similar functionality? Regards ShotSimon

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• Does any method exist quickly to detect valid range versions of used library

  - by daneel-yaitskov

  I'm a beginner Haskell programmer. I have written some useful code for the last six month. And I want to release a library from it. The code will use system installation cabal as any Haskell library. A library is released with cabal has a meta data file where there is a logical predicate from the libraries and their versions. A developer usually uses one set libraries. It tediously care a set of the sets libraries. How to know either my library is compiled successfully or not for some subset libraries?

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• How is animation accomplished in these apps?

  - by android noob

  Most of the Android users use the GO SMS app, and the iPhone users use their normal messaging app (Android rocks). Now, whenever a user types a message and presses the send button, the message's edit text field sets a glossy green background, also the green colored background comes floating at the back of the edit text field. How do they do it? (I have been searching this for a while, but was unable to find an answer.)

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• What's causing "Unable to retrieve native address from ByteBuffer object"?

  - by r0u1i

  As a very novice Java programmer, I probably should not mess with that kind of things. Unfortunately, I'm using a library which have a method that accepts a ByteBuffer object and throws when I try to use it: Exception in thread "main" java.lang.NullPointerException: Unable to retrieve native address from ByteBuffer object Is it because I'm not using a non-direct buffer? edit: There's not a lot of my code there. The library I'm using is jNetPcap, and I'm trying to dump a packet to file. My code takes an existing packet, and extract a ByteBuffer out of it: byte[] bytes = m_packet.getByteArray(0, m_packet.size()); ByteBuffer buffer = ByteBuffer.wrap(bytes); Then it calls on of the dump methods of jNetPcap that takes a ByteBuffer.

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• In which language the KIS application might have been developed??

  - by Jeba

  Hello all, I just went through this link http://www.pcauthority.com.au/Feature/91093,the-tsar-of-antivirus.aspx and found that it's developed using c/c++ and visual studio with a little assembly language support. As a programmer i just want to know in what programming language the kaspersky internet security User Interface(UI) has been developed? Might be using QT(coz. of c++)? or using MFC(coz. of visual studio)?? With side tab like thing the UI looks good. Expecting the answers from expert analysts.

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• what changes when your input is giga/terabyte sized?

  - by Wang

  I just took my first baby step today into real scientific computing today when I was shown a data set where the smallest file is 48000 fields by 1600 rows (haplotypes for several people, for chromosome 22). And this is considered tiny. I write Python, so I've spent the last few hours reading about HDF5, and Numpy, and PyTable, but I still feel like I'm not really grokking what a terabyte-sized data set actually means for me as a programmer. For example, someone pointed out that with larger data sets, it becomes impossible to read the whole thing into memory, not because the machine has insufficient RAM, but because the architecture has insufficient address space! It blew my mind. What other assumptions have I been relying in the classroom that just don't work with input this big? What kinds of things do I need to start doing or thinking about differently? (This doesn't have to be Python specific.)

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• Programming Quiz [closed]

  - by arin-s-rizk

  Hi one of my mates sent me this quiz see if you can guess the answers I will post mine later. In this quiz, some tasks related to the compilation process are listed. For each one of them, specify the part of the compiler that is responsible of performing it. Here are the possible answers: Lexical analyzer Parser Semantic analyzer None of the above Just fill the right choice (the number only) in the blank after each task: Checking that the parentheses in an expression are balanced _ _ _ _ _ Removing comments from the program _ _ _ _ _ Grouping input characters into "tokens" _ _ _ _ _ Reporting an error to the programmer about a missing (;) at the end of a C++ statement _ _ _ _ _ Checking if the type of the RHS (Right-Hand Side) of an assignment (=) is compatible with the LHS (Left-Hand Side) variable _ _ _ _ _ Converting the (AST) Abstract Syntax Tree into machine language _ _ _ _ _ Reporting an error about a strange character like '^' in a C++ program _ _ _ _ _ Optimizing the AST _ _ _ _ _

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• Java technologies for web-development.

  - by Alex

  Hello. I'm PHP-programmer, but I'm extremely interested in learning Java. So I decided to change speciality from PHP to Java. At the moment I have an opportunity to try to make quite simple web-application (it should contain 2-3 forms, several pages with information from the database and authorization module) and also I have a chance to choose any technology I want. Besides I have about 3 months for this task. I've decided to develop site with Java technologies for the purpose of studying. I've already read a book about Java ("Java2 Complete Reference" by P.Naughton) and currently I'm reading "Thinking in Java" by B.Eckel. I clearly understand it's not enough for efficient development, but I want, at least, to try. I would be very appreciated for the advises, which framework (for example) or technology to choose (Spring, Grails etc.) and what primary aspects and technologies of Java should I pay attention to? Thank you in advance.

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• What's the silliest programming mistake you've ever done? [closed]

  - by bgo

  Despite not being a professional programmer, i use python or c to accomplish simple tasks. Once I needed a nasty equation to use with various data for physics lab. I thought that it would take a few hours if i used some mechanic calculator. Then i've written a python script to make things easier but something was wrong. After finding my mistakes one of which was forgetting to put ":", i realized that it had already took 2-3 hours, not to mention inventing satanic arithmetic techniques since i thought the errors was caused by my math :) Sometimes when you don't see it, you don't see it! Now i can find the syntax errors without thinking for a moment :) Any similar annoying mistakes that you've experienced?

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• error msg in avr studio4

  - by shubhang

  i have recently purchased an AVR USB programmer from robokits.co.in, was trying to program atmeg8 using AVR studio4 and i get the following when i click on the program options: a problem occurred when executing the command. make sure u are using the correct programming method. current mode is ISP verify that the device is placed in the correct socket, and that the ISP cable is connected properly.check that the programming frequency specified in the main page is well below 1/4th of the clock frequency of the device. i have tried all that i could think of, i have checked the connections and the freq is below 1/4th of the device. but that doesn't solve this problem i have made the circuit for blinking LEDs program please help me out see the image for details thanking you

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• Clojure for a lisp illiterate

  - by dbyrne

  I am a lifelong object-oriented programmer. My job is primarily java development, but I have experience in a number of languages. Ruby gave me my first real taste of functional programming. I loved the features Ruby borrowed from the functional paradigm such as closures and continuations. Eventually, I graduated to Scala. This has been a great way to gradually learn to approach non-trivial problems in a functional manner. Now I am interested in Clojure. I know all the sexy features that make it enticing (software transactional memory, macros, etc.), but I just can't get used to "thinking in lisp". I've seen Rich Hickey's screencasts aimed at java programmers, but they are geared towards explaining language features and not approaching real world problems. I am looking for any advice or resources which have made this transition easier for others.

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• Does anyone else think instance variables are problematic in database-backed applications?

  - by Ben Aston

  It occurs to me that state control in languages like C# is not well supported. By this, I mean, it is left upto the programmer to manage the state of in-memory objects. A common use-case is that instance variables in the domain-model are copies of information residing in persistent storage (i.e. the database). Clearly this violates the single point of authority principle, and "synchronisation" has to be managed by the developer. I envisage a system where instead of instance variables, we have simple public access/mutator methods marked with attributes that link them to the database, and where reads and writes are mediated by a framework that decides whether to hit the database. Does such a system exist? Am I completely missing the point, or is there some truth to this idea?

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