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  • Usage of Python 3 super()

    - by deamon
    I wonder when to use what flavour of Python 3 super(). Help on class super in module builtins: class super(object) | super() -> same as super(__class__, <first argument>) | super(type) -> unbound super object | super(type, obj) -> bound super object; requires isinstance(obj, type) | super(type, type2) -> bound super object; requires issubclass(type2, type) Until now I've used super() only without arguments and it worked as expected (by a Java developer). Questions: What does "bound" mean in this context? What is the difference between bound and unbound super object? When to use super(type, obj) and when super(type, type2)? Would it be better to name the super class like in Mother.__init__(...)?

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  • How do I turn off accelerometer input for my flipside view

    - by user308050
    I have an iPhone 3.1.3 app which has only 2 methods of input in its main view. It has an info button to switch to a flipside view, and the only other input it takes in the main view is accelerometer movement. I want to switch off the accelerometer input when in the flipside view but haven't been able to find out how. I have the main view controller set as an accelerometer delegate, but did not do the same for the flipside view controller, though I suspect that it inherited it from the main view controller. I am really new to xcode and objective c, I have been reading these forums and a couple of developer books, but if anyone has any tips on other good places to look, please let me know.

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  • Error when starting a tab activity in Android?

    - by ATDeveloper
    I followed the directions verbatim in this Android tutorial, copying/pasting the code from the site to my app. http://developer.android.com/resources/tutorials/views/hello-tabwidget.html However, when I try to run in the Android emulator, I get the error: "The application Hello Tab Widget has stopped unexpectedly. Please try again." I tried debugging by introducing a breakpoint in the first line of the onCreate method, but the error occurs before the breakpoint is even hit. Any idea of what is going wrong, or any other way I can debug this issue? I am using Eclipse.

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  • Embedded Linux or eCos ?

    - by mawg
    One way to look at it - embedded Linux starts with desktop Linux & ditches the parts not needed for embedded systems (is this actually true?), whereas eCos is designed from the ground up for embedded systems. Now, assume an ARM processor, probably ARM 7 - does performance make a difference? Actually, we talking a very low load system, max 500 transactions a day. Any advantages of one over the other (or FreeRTOS, etc)? Stability, maturity, performance, development tools, anything else? All that I can think of is that if I am certain that I will never port to another o/s, then if I go with embedded Linux, I don't need an o/s abstraction layer to allow me to do unit testing on host (desktop Linux box). Any thoughts or comments? Thanks.

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  • Python Django MySQLdb setup problem:: setup.py dosen't build due to incorrect location of mysql

    - by 108860375137931889948
    I'm trying to install MySQLdb for python. but when I run the setup, this is the error I get. well I know why its giving all the missing file statements, but dont know where to change the bold marked location from. Please help gaurav-toshniwals-macbook-7:MySQL-python-1.2.3c1 gauravtoshniwal$ python setup.py build running build running build_py copying MySQLdb/release.py - build/lib.macosx-10.3-fat-2.6/MySQLdb running build_ext building '_mysql' extension gcc-4.0 -arch ppc -arch i386 -isysroot /Developer/SDKs/MacOSX10.4u.sdk -fno-strict-aliasing -fno-common -dynamic -DNDEBUG -g -O3 -Dversion_info=(1,2,3,'gamma',1) -D_version_=1.2.3c1 -I/Applications/MAMP/Library/include/mysql -I/Library/Frameworks/Python.framework/Versions/2.6/include/python2.6 -c _mysql.c -o build/temp.macosx-10.3-fat-2.6/_mysql.o _mysql.c:36:23: error: my_config.h: No such file or directory _mysql.c:36:23: error: my_config.h: No such file or directory _mysql.c:38:19: error: mysql.h: No such file or directory _mysql.c:38:19:_mysql.c:39:26: error: mysqld_error.h: No such file or directory error: _mysql.c:40:20:mysql.h: No such file or directory

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  • iPhone web apps running as native apps

    - by Henrikb4
    The browser on the iPhone is capable of using advanced web technologies introduced in HTML5. One of these is the app cache that allows web pages to run on the client, from the cache, without a connection to the internet. Together with Local Storage you can also save data permanently "in" the page. My question is, would it then be possible to make a website that when visited and set as a web clip (bookmark on the home screen), could be accessed again, at any moment. Using HTML5, Javascript and css, you can make some very good apps and at the same time avoid the pricey developer fee, the harsh app approval and the single platform development platform? Or am I just dreaming?

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  • C# Social Networking SDK

    - by Nix
    I am currently gathering some technology requirements for a site that will be a social network based. I don't want to re-invent the wheel so i am looking for some type of SDK or collection of tools that can provide me with a way of creating/managing a social network. I understand that no framework will probably fit my exact needs so I am also looking for a flexible/extendable framework. An example extension point would be allowing the user to provide sub networks, maybe a global network that could be sub classified as work and friends. Beyond that it would also be nice to somehow be able to import contacts from other networking sites (Facebook, Linked In, etc). My current technology suite will consist of the following: IIS 7.0 WCF Data Services SQL Server 2006 ASP.NET front end. If there is any more information you may need please let me know.

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  • High-quality ERD generator for PostgresQL under Linux?

    - by Dave Jarvis
    Background MySQL Workbench can produce appealing and high-quality ERDs such as: Research I have not found a tool that even comes close for PostgreSQL. Tools I have found: dbVisualizer - Yellow squares. AquaFold - Yellow squares. SQL Developer - Coloured squares. Dia - Coloured squares. SchemaBank - Can't export to PNG; looks okay, nothing stellar. SchemaSpy - XML export makes it possible to write an XSL skin... Gliffy - Incompatible Flash version. Druid - No. pgAdmin3 - Not applicable? phpPgAdmin - Couldn't login without a 30-minute configuration battle. Requirements Looking for an ERD tool: Visually stunning by default Can reverse-engineer a PostgreSQL (or JDBC-compliant) database Runs on Linux (or under WINE) Export high-resolution PNG (or SVG) FOSS

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  • Easy GWT Animations

    - by brad
    I've started looking at some external GWT libraries for animations, but they all seemd a bit overkill for what i want. I'm trying to mimic JQuery Tools scrollabel plugin in GWT for a scrolling navigation (think iphone). User clicks an item, page scrolls to the child panel of that item, which may also have children that can be clicked. All I need to do is slide a div, x number of pixels backwards and forwards over some fixed rate of time The only real tutorial i've found on writing animations in GWT is 2 years old and seems a bit verbose, (managing individual frames etc...) Is there no simpler solution for easily moving a div from one position to another without requiring all the extra cruft? Forgive me but I'm coming from jQuery coding that has this built in simply and easily.

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  • PHP Flush: How Often and Best Practises

    - by Cory Dee
    I just finished reading this post: http://developer.yahoo.com/performance/rules.html#flush and have already implemented a flush after the top portion of my page loads (head, css, top banner/search/nav). Is there any performance hit in flushing? Is there such a thing as doing it too often? What are the best practices? If I am going to hit an external API for data, would it make sense to flush before hand so that the user isn't waiting on that data to come back, and can at least get some data before hand? Thanks to everyone in advance.

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  • Eclipse Code Templates with Cobol

    - by Bruno Brant
    People, My team is just beginning to learn how to use COBOL on Eclipse (as part of the Rational Developer for System Z package) and one of our most desired features are code templates or code snippets. What we'd like to have is a code completion based on snippets just like we have on Java. For example, when I type try and hit ctrl-space Eclipse shows me a list of completion options, where one of those is create a try/catch block. Well, in COBOL one could leverage this when creating, for example, embedded SQL blocks, like EXEC SQL SELECT field, field, field, FROM table WHERE field = value, field = value END-EXEC. However, for some reason, it seems that Eclipse treats COBOL a little differently (no wonder why) from other languages. As such, when looking for the code templates in the preferences menu for COBOL, its appearance is very different from the Java one. The question is: how does one uses Eclipse's code templates with COBOL?

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  • Invoking .Net COM assembly from Powerbuilder application (without registration)

    - by as
    We have a Powerbuilder 10 application that is using .Net COM assemblies. We are trying to embed the manifest in the PB application (to invoke COM assemblies without registration). The merged manifest file has added sections for dependecies on the .Net COM assemblies. We have tries various tools to inject the new manifest with different results - using GenMan32 to inject truncates the application from 6MB to 45KB. - using ResourceTuner, the file size looks okay, but trying to launch application gives "Fatal Disk Error". Any suggestions on invoked .Net ComEnabled assembly from PB without registration?

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  • Store XML data in Core Data

    - by ct2k7
    Hi, is there any easy way of store XML data into core data? Currently, my app just pulls the values from the XML file directly, however, this isn't efficient for XML files which holds over 100 entries, thus storing the data in Core Data would be the best option. XML file is called/downloaded/parsed ever time the app opens. With the Core Data, the XML data would be downloaded ever 3600 seconds or so, and refresh the current data in the core data, to reduce the loading time when opening the app. Any ideas on how I can do this? Having reviewed the developer documentation, it doesn't look very tasty.

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  • Computer Vision and AR libraries availabe for Android?!?!?

    - by Arturo
    Hello I am starting out as an Android Developer, and I would like to know if there are any Computer vision libraries or Augmented Reality libraries for the Android SDK , as I am planning to use these libraries for a mobile app. I have read that if I download the NDK, I might be able to "import/use" the C openCV, and ARtoolkit libraries, but I am wondering if this is possible, or if there is a better and easier way of using these tools. Android apps are programmed in Java, yet OpenCV & ARtoolkit use C/C++, any way to use these libraries?!? Thank you!

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  • JavaEE in netbeans giving BUILD FAILED error upon deployment

    - by user312402
    When I try to run my Java EE program in Netbeans consisting of servlets (java pages), JSP's, beans(java pages) and HTML pages I get this error in the output: In-place deployment at C:\Users\Derek\Documents\NetBeansProjects\EJBProject\EJBProject-war\build\web Initializing... deploy?path=C:\Users\Derek\Documents\NetBeansProjects\EJBProject\EJBProject-war\build\web&name=EJBProject-war&force=true failed on Personal GlassFish v3 Domain C:\Users\Derek\Documents\NetBeansProjects\EJBProject\EJBProject-war\nbproject\build-impl.xml:611: The module has not been deployed. BUILD FAILED (total time: 1 second) And then in the command prompt when I run asant run in the appropriate directory, I get: C:\Users\Derek\Documents\NetBeansProjects\EJBProject\nbproject\build-impl.xml:19: Class org.apache.tools.ant.taskdefs.condition.Not doesn't support the nested "antversion" element. Do you know why this would be? Why won't netbeans deploy my application so I can run and test it?

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  • Bug Running Android Tutorial HelloTabWidget under SDK 1.5: "setCurrentTag(getIntent())"

    - by Matt J.
    does not compile. Indeed: even in 1.5, this api, getIntent(), is already listed as deprecated. The error message I get complains that getIntent() does not return a String, but setCurrentTab() expects a string. If I guess and change the line to read: "tabHost.setCurrentTab(1); // was setCurrentTab(getIntent())", then it compiles, builds, but does not run. I get the "stopped unexpectedly" error message from the emulator. I cannot even get Log.d to output, so it seems that it stops 'unexpectedly' very early. So the first and main question is: what is the correct fix to "tabHost.setCurrentTab(getIntent())" in the final line of OnCreate() in http://developer.android.com/resources/tutorials/views/hello-tabwidget.html? The second and simpler question is: did I guess right in replacing 'mTabHost' with tabHost in the one place where that occurs?

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  • Entity Framework vs. nHibernate for Performance, Learning Curve overall features

    - by hadi
    I know this has been asked several times and I have read all the posts as well but they all are very old. And considering there have been advancements in versions and releases, I am hoping there might be fresh views. We are building a new application on ASP.NET MVC and need to finalize on an ORM tool. We have never used ORM before and have pretty much boiled down to two - nHibernate & Entity Framework. I really need some advice from someone who has used both these tools and can recommend based on experience. There are three points that I am focusing on to finalize - Performance Learning Curve Overall Capability Your advice will be highly appreciated. Best Regards,

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  • Saving custom attributes in NSAttributedString

    - by regulus6633
    I need to add a custom attribute to the selected text in an NSTextView. So I can do that by getting the attributed string for the selection, adding a custom attribute to it, and then replacing the selection with my new attributed string. So now I get the text view's attributed string as NSData and write it to a file. Later when I open that file and restore it to the text view my custom attributes are gone! After working out the entire scheme for my custom attribute I find that custom attributes are not saved for you. Look at the IMPORTANT note here: http://developer.apple.com/mac/library/DOCUMENTATION/Cocoa/Conceptual/AttributedStrings/Tasks/RTFAndAttrStrings.html So I have no idea how to save and restore my documents with this custom attribute. Any help?

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  • graphics programming

    - by PVB
    hi , i would like to program some graphic figures such as line, circle,etc. i have used turboc++ 3.0 for dos graphics. i would like to do the same with the compilers dev c++ or code blocks or vc++. i would like to implement dda and bresenhems line and circle drawing algorithm. how should i go about implementing these programs through these compilers (not the command line tools). i have a really vague picture of graphics programming.please help.. thanks in advance. please note : i have a nvidia graphics card 1gb.. so i cannot use dos graphics (i think the card is the reason).

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  • Catching OutOfMemoryError

    - by dotsid
    Documentation for java.lang.Error says: An Error is a subclass of Throwable that indicates serious problems that a reasonable application should not try to catch But as java.lang.Error is subclass of java.lang.Throwable I can catch this type of throwable. I understand why this is not good idea to catch this sort of exceptions. As far as I understand, if we decide to caught it, the catch handler should not allocate any memory by itself. Otherwise OutOfMemoryError will be thrown again. So, my question is: is there any real word scenarios when catching java.lang.OutOfMemoryError may be a good idea? if we catching java.lang.OutOfMemoryError how can we sure that catch handler doesn't allocate any memory by itself (any tools or best practicies)? Thanks a lot.

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  • Debugging FLEX/AS3 memory leaks

    - by Scott Evernden
    I have a pretty big Flex & Papervision3D application that creates and destroys objects continually. It also loads and unloads SWF resource files too. While it's running the SWF slowly consumes memory til about 2GB when it croaks the player. Obviously I am pretty sure I let go of reference to instances I no longer want with expectation the GC will do its job. But I am having a heck of a time figuring out where the problem lies. I've tried using the profiler and its options for capturing memory snapshots, etc - but my problem remains evasive. I think there are known problems using debug Flash player also? But I get no joy using the release version either. How do you go about tracking down memory leak problems using FLEX/AS3 ? What are some strategies, tricks, or tools you have used to locate consumption

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  • Delphi Phrase Count / Keyword Density

    - by Brad
    Does anyone know how to or have some code on counting the number of unique phrases in a document? (Single word, two word phrases, three word phrases). Thanks Example of what I'm looking for: What I mean is I have a text document, and i need to see what the most popular word phrases are. Example text I took the car to the car wash. I : 1 took : 1 the : 2 car: 2 to : 1 wash : 1 I took : 1 took the : 1 the car : 2 car to : 1 to the : 1 car wash : 1 I took the : 1 took the car : 1 the car to : 1 car to the : 1 to the car : 1 the car wash : 1 I took the car to : 1 took the car to the : 1 the car to the car : 1 car to the car wash : 1 I need the phrase, and the count that it shows up. Any help would be appreciated. The closet thing I found to this was a PHP script from http://tools.seobook.com/general/keyword-density/source.php I used to have some code for this, but I cannot find it.

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  • Reordering matrix elements to reflect column and row clustering in naiive python

    - by bgbg
    Hello, I'm looking for a way to perform clustering separately on matrix rows and than on its columns, reorder the data in the matrix to reflect the clustering and putting it all together. The clustering problem is easily solvable, so is the dendrogram creation (for example in this blog or in "Programming collective intelligence"). However, how to reorder the data remains unclear for me. Eventually, I'm looking for a way of creating graphs similar to the one below using naive Python (with any "standard" library such as numpy, matplotlib etc, but without using R or other external tools).

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  • Read.article had been denied several times

    - by Daniel Korobkov
    We've got a new beta Recommendation Bar plugin at our www.booknik.ru web-site. It works perfect when people logged it is its administrator or developer and it's not when isn casual user without any special role. We tried to submit our read.article action, but it was denied with that: The built-in read.article you submitted doesn't meet our requirements (https://developers.facebook.com/docs/opengraph/actions/builtin/#read). Please make sure your users can remove articles they shared "within" your app on each page an article appears. Once you have made the appropriate changes please delete this action, create a new one, and submit it. As for that, our plugin users have the ability to delete their activity but Facebook doesn't allow us to make this plugin public. What should we do to make it work? Thanks a lot for your help!

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  • Flash swf to play PCM WAV files?

    - by Geuis
    I am in need of a Flash swf that is capable of loading PCM WAV files via a url passed to it. An example of the file can be found here: http://msdn.microsoft.com/en-us/library/ff512405.aspx The swf does not need a visible interface, as it is meant for audio playing only and not user interaction. The swf should have a simple javascript interface for page-level interactions. These include: load(url): loads a PCM WAV file over the internet using the url that is passed through it. play(): Should play the PCM WAV file that was loaded stop(): Should stop playing the current file. I can provide a sample audio file that matches the specifications if the developer is unable to obtain a url from the link posted above.

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