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Articles indexed in June 2010

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  • Is there an easily available implementation of erf() for Python?

    - by rog
    I can implement the error function, erf, myself, but I'd prefer not to. Is there a python package with no external dependencies that contains an implementation of this function? I have found http://pylab.sourceforge.net/packages/included_functions.htmlthis but this seems to be part of some much larger package (and it's not even clear which one!). I'm sorry if this is a naive question - I'm totally new to Python.

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  • Fullscreen iPhone animation from PNG

    - by Sergey
    Hi, I need in animation of sequence of more PNG files (300 png files and size is 320x480). I've try make it with 12 fps, but sometime iPhone 3g have lags... 3gs working fine. I think 2g working with lags always. I've use one UIImageView and loading images in NStimer callback by UIImage:imageWithContentOfFile. May be this is not best way to animation png files ? note: previously i've used ImageOptim to pack (or strip ??) all my images (from 20% to 80% of size strip). regards,

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  • What I&rsquo;m Reading &ndash; 2 &ndash; Microsoft Silverlight 4 Data and Services Cookbook

    - by Dave Campbell
    A while back I mentioned that I had a couple books on my desktop that I’ve been “shooting holes” in … in other words, reading pieces that are interesting at the time, or looking something up rather than starting at the front and heading for the back. The book I want to mention today is Microsoft Silverlight 4 Data and Services Cookbook : by Gill Cleeren and Kevin Dockx. As opposed to the authors of the last book I reviewed, I don’t personally know Gill or Kevin, but I’ve blogged a lot of their articles… both prolific and on-topic writers. The ‘recipe’ style of the book shouldn’t put you off. It’s more of the way the chapters are laid out than anything else and once you see one of them, you recognize the pattern. This is a great eBook to have around to open when you need to find something useful. As with the other PACKT book I talked about have the eBook because for technical material, at least lately, I’ve gravitated toward that. I can have it with me on a USB stick at work, or at home. Read the free chapter then check out their blogs. You may be surprised by some of the items you’ll find inside the covers. One such nugget is one I don’t think I’ve seen blogged:  “Converting You Existing Applications to Use Silverlight”. Another good job! Technorati Tags: Silverlight 4

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  • What's wrong with my vmware start script?

    - by Tore Niedahl
    I am starting a vmware 2.x vm on a linux host. This is my script: #!/bin/sh vmrun -T server -h https://localhost:11768/sdk -u tore -p mypass123 start "[my1] server1/server1.vmx" I have defined a local datastore [my1] as /mnt/my1/vm and the physical location of server1.vmx is /mnt/my1/vm/server1/server1.vmx The result when I call the script is: Error: Cannot open VM: [my1] server1/server1.vmx, The virtual machine cannot be found But I can start the vm from the browser ui.

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  • App to convert from ANSI to UTF8 on windows [closed]

    - by antoniocs
    Possible Duplicate: Batch-convert files for encoding or line ending under Windows Hey! I have many files that are encoded in the ANSI (iso-8859-1) format and I want to change it to utf8. I am converting one by one using notepad++ but I was wondering if there is any application that will convert them all (I have many files) in a quick and easy way. Anyone know of one app that will do this?? (free app would be great) Thanks

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  • Opinions sought on the best way to organise classes in PHP

    - by jax
    I am pretty much set on using the Java package naming convention of com.website.app.whatever but am unsure about the best way of doing this in PHP. Option 1: Create a directory structure com/ mysite/ myapp/ encryption/ PublicKeyGenerator.class.php Cipher.class.php Xml/ XmlHelper.class.php XmlResponse.class.php Now this is how Java does it, it uses the folders to organize the heirarchy. This is however a little clumsy in PHP because there is no native support for it and when you move things around you break all includes. Option 2 Name classes using a periods for the package, therefore sames are just like in Java but can all be in the same directory making __autoload a breeze. classes/ com.mysite.myapp.encription.PublicKeyGenerator.class.php com.mysite.myapp.encription.Cipher.class.php com.mysite.myapp.xml.XmlHelper.class.php com.mysite.myapp.xml.XmlResponse.class.php The only real disadvantage here is that all the classes are in a single folder which might be confusing for large projects. Opinions sought, which is the best or are there other even better options?

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  • what would be the output?

    - by Abhishek Jain
    Please explain me below situation What would be the output? interface A{} class B implements A{} class C extends B{} Class D extends C{} class E extends D{ public static void main(String args[]){ C c = new C(); B b = c; A a = (E)c; A a = (B)c; C c = (C)(B)c; } }

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  • How to calculate 2^n-1 efficiently without overflow?

    - by Ludwig Weinzierl
    I want to calculate 2^n-1 for a 64bit integer value. What I currently do is this for(i=0; i<n; i++) r|=1<<i; and I wonder if there is more elegant way to do it. The line is in an inner loop, so I need it to be fast. I thought of r=(1ULL<<n)-1; but it doesn't work for n=64, because << is only defined for values of n up to 63.

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  • Android HelloWorld Build Path error

    - by BahaiResearch.com
    On my Mac I installed Eclipse, the SDK and created a new project, then hit build expecting to see my first helloworld app. I got the error "the project cannot be built until build path errors are fixed". After going thru all the path-like options in Preferences, I noticed that on the tab "Java Build Path" the "Google APIs [Android 2.2]" option did not have its check box checked. Checking it made the problem go away. It works now and I can see the app in the Emulator Have I not set up my environment correctly? I used all the defaults in Eclipse and the Android SDK.

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  • How do I conditionally assign ruby variables to javascript variables?

    - by Tony
    I have a website where I need a javascript version of the "current user" object along with the ruby version. I have been assigning these variables doing something like this... Application Controller: def get_user begin @current_user = User.find(session[:user_id]) if session[:user_id] @current_user_json = @current_user.to_json rescue session.delete(:user_id) @current_user = nil @current_user_json = {} end end Web Page: var current_user = null; current_user_json = '<%= @current_user_json %>'; if(current_user_json != ''){ current_user = current_user_json.user; } Even when there is a current user, I get the current user is undefined. Probably because I am putting the current_user_json assignment around single quotes. However, if I don't put it around single quotes, I'll always get a javascript error when no user is logged in because the syntax is invalid - current_user_json = ; I think I am just looking at this completely wrong and there must be a better way. Given that this is probably a common thing to do, I wanted to get other people's opinion on how to create an object in javascript that is a duplicate of the ruby object.

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  • Safari Extension - How to respond to Settings changes?

    - by Martin Marlow
    Hi, I'm currently working on an Extension for Safari 5 and I want to run a listener function whenever Settings changes are made. Apple provides an example for that, but it doesn't work for me. I currently have this listener function in my global html file: function numberChanged() { if(event.key == "number") alert("Number has changed!"); } safari.self.addEventListener("change", numberChanged, false); I hope somebody can help me. Does somebody know what I'm doing wrong?

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  • iPhone. Open application during call

    - by immuner
    Is there any way to do this? In other words, is it possible during a call to allow the user to open a certain application? (for example, to provide information based on the person who is calling). If not, will something like this be available on iOS 4?

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  • How does compiling circular dependencies work?

    - by Fabio F.
    I've made the example in Java but I think (not tested) that it works in other (all?) languages. You have 2 files. First, M.java: public class MType { XType x; MType() {x = null;} } Second, another file (in the same directory), XType.java: public class XType { MType m; public XType(MType m) {this.m = m;} } Ok it's bad programming, but if you run javac XType it compiles: compiles even MType because XType needs it. But ... MType needs XType ... how does that work? How does the compiler know what is happening? Probably this is a stupid question, but I would like to know how the compiler (javac or any other compilers you know) manages that situation, not how to avoid it. I'm asking because i'm writing a precompiler and I would like to manage that situation.

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  • SQL Server log backups "stalling"

    - by MattK
    I have interited a box running SQL Server 2008 and Windows 2003, and have had a few events where largeish (35GB) log backups "stall", both before and after the installation of SQL 2008 SP1. The server log ships to a standby, so regular log backups are taken at 15 minute intervals. However, after an index reorg causes the log to grow to about 35GB (on a DB with about 17GB of data), the next log backup runs to ~95% completion, then seems to stop. The process shows as suspended, with a wait state of BACKUPIO. CPU, read, and write activity on the SPID also does not change, and the process stays in this state for hours, when normally a backup of this size should complete in about 20 minutes. This server has a single RAID-1 volume, thus the source database files and destination backup files are on the same volume. However, I cannot determine if another process is blocking the backup. The backup SPID cannot be killed, and the only way to terminate the log backup and clear the lock on the backup file is to cycle the SQL Server service. There was one event where the backup terminated completely, with an error that another process had locked the backup file, but no details about what that process was. Can anyone suggest a cause or diagnostic process to this situation?

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  • Sync multiple gmail contacts on iPhone

    - by Webnet
    I'm trying to setup my iPhone so that it is synced with 2 gmail contact lists. I'd prefer not to just "import" them and would like to avoid using any 3rd party software/sites. I have 1 gmail account setup as an exchange with gmail, contacts, and calendars. I'm hoping someone can tell me how to do this.

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