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• XPCOM support in Android webkit browser?

  - by Krish

  Does the Android WebKit supports the XPCOM framework or NPRuntime API`s as like Firefox? How to implement JavaScript in the Android WebKit plug-in? Update: I am writing a media player plug-in for the Android WebKit browser and my plug-in needs to get the command from the web page through JavaScript (some actions like play/pause/stop/resize are issued as JavaScript commands from the browser). My plug-in is written in native C code. Are there any examples or sample plug-in available for JavaScript communication?

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• OpenAL doesn't work when using AVAudioRecorder and AVAudioPlayer

  - by Pawe

  hi. i have been troubled about audio problem for several days. i don't think OpenAL get along with AVAudio functions. i have my own OpenAL class. ( wrapped the MyOpenAL class ) my app start to record using AVAudioRecorder. i stop recording. and then i clicked the "OpenAL Play"button that play any sound using OpenAL. i can't hear it. but i can hear my recording when i clicked the "AVAudioPlayer Play" button using AVAudioPlayer. i tested oalTouch,avTouch,SpeakHear sample code. they resulted same. Does OpenAL have the problem using AVAudio~ Functions together? I was googling for a long time. but i couln't find out the solutions and the same problems issue. thanks for reading mine.

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• Add Web Reference prompts for credentials with "Discovery Credential" dialog but won't accept valid

  - by Eden

  I'm attempting to add a web reference to my ASP.Net 3.0 project. This is a reference to the SQL Server Reporting Services web service. I have verified the service is up and running, but when I try to add the web reference in my project, I am prompted for my credentials, which I enter, and then prompted again and again and again. I have to hit cancel to stop the vicious cycle. When I do that the service definition comes up in the window, but the "Add Reference" button is disabled so I can't add the reference to my project. I have limited knowledge of SQL Reporting Services configurations. If anyone knows how to resolve this problem I'd really appreicate it.

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• Rails - operation outside of a rollback

  - by Brian Armstrong

  I have a before_create filter that checks if people are posting too many comments. If they are I want to flag their account. class Comment < ActiveRecord::Base before_create :check_rate_limit def check_rate_limit comments_in_last_minute = self.user.comments.count(:conditions => ["comments.created_at > ?", 1.minute.ago]) if comments_in_last_minute > 2 user.update_attribute :status, "suspended" return false end true end end The before filter returns false to stop the comment from being created. The problem is that this triggers a ROLLBACK which also undoes the changes I made to the user model. What's the correct pattern to accomplish this? Specifically: running a check each time an object is created and being able to edit another model if the check fails.

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• makefile pattern rules: single wildcard, multiple instances in prerequisite

  - by johndashen

  Hi all, hopefully this is a basic question about make pattern rules: I want to use a wildcard more than once in a prerequisite for a rule, i.e. in my Makefile I have data/%P1.m: $(PROJHOME)/data/%/ISCAN/%P1.RAW @echo " Writing temporary matlab file for $*" # do something data/%P2.m: $(PROJHOME)/data/%/ISCAN/AGP2.RAW @echo " Writing temporary matlab file for $*" # do something In this example, I try to invoke make when the wildcard % is AG. Both files $(PROJHOME)/data/AG/ISCAN/AGP1.RAW and $(PROJHOME)/data/AG/ISCAN/AGP2.RAW exist. I attempt the following make commands and get this output: [jshen@iLab10 gender-diffs]$ make data/AGP1.m make: *** No rule to make target `data/AGP1.m'. Stop. [jshen@iLab10 gender-diffs]$ make data/AGP2.m Writing temporary matlab file for AG, part 2... [jshen@iLab10 gender-diffs]$ ls data/AG/ISCAN/AG* data/AG/ISCAN/AGP1.RAW data/AG/ISCAN/AGP2.RAW How can I implement multiple instances of the same wildcard in the first make rule?

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• what is the right way to exit Windoes Service OnStart if configuration is wrong and nothing to do in

  - by matti

  Is something like this ok? protected override void OnStart(string[] args) { if (SomeApp.Initialize()) { SomeApp.StartMonitorAndWork(); base.OnStart(args); } } protected override void OnStop() { SomeApp.TearDown(); base.OnStop(); } Here Initialize reads a config file and if it's wrong there's nothing to do so service should STOP! If config is ok StartMonitorAndWork starts: Timer(new TimerCallback(DoWork), null, startTime, loopTime); and DoWork polls database periodically. The question is: "Is exiting OnStart without doing nothing enough if Initialize returns false? OR should there be something like this: private void ExitService() { this.OnStop(); System.Environment.Exit(1); } protected override void OnStart(string[] args) { if (ObjectFolderApp.Initialize()) { SomeApp.StartMonitorAndWork(); base.OnStart(args); } else { ExitService(); } } Thanks & BR - Matti

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• Developer workload management software: recommendations?

  - by PaddyC

  In my place, we use two issue tracking tools, one for production bugs, and another for issues on projects in development. These tools are good for managers. However, at an individual level, other work can also arrive through desk visits, email, or the phone, and those allocating the work aren't always interested in issue tracking systems. I've recently rolled off an 18-month project where I got into a cycle of overtime, and I found that I didn't always have good visibility of all work assigned to me. As a result, I was always very busy, and felt constantly laden down with work, but didn't have the clear data to show my manager (or, ironically, the time to stop and gather the information!). A handwritten list, updated at the end of each day, is a good start, but can anyone recommend better tools to help me get a clear view of my own workload? Ideally, I'm thinking of software tools for developers, which could incorporate estimates, but all suggestions welcome. Thanks, Paddy

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• wpf do animation until background worker finishes its work

  - by toni

  Hi! I have an application that do some hard stuff when user clicks a start button and takes a long time. During this I would like to do some animation over a label, for example, changing opacity from 0 to 1 and vice versa and change foreground color between several colors at the same time changing opacity. I want it stops doing animation when background worker finishes its work. How can I do this? and how can I start animation and stop it from c#? Thanks very much!

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• How does the momentum/inertial scroll work with the Magic Mouse on NSScrollView?

  - by jbrennan

  When you scroll with the newer Apple Magic Mouse (at least on 10.6, I can't confirm any previous Mac OS) you get inertial scroll like scrolling on iPhone (that is, after a flick of the finger to scroll, it doesn't abruptly stop, but instead gradually slows down). This behaviour is "for free" with all NSScrollViews, it would appear. There are exceptional cases, such as Tweetie for Mac (I've heard Tweetie was written with a custom Table View class that works akin to how UITableView works on iPhone). My question is, how do the scroll views know how to do this inertial scrolling? My guess is the mouse [driver] repeatedly sends scroll events with a dampening scroll magnitude (or something like that) over the scroll period. But I'm not really sure how it works. I am having some scrolling problems in my scrollview class and I'm trying to figure out why (obviously we don't have the source code to Tweetie to see why it doesn't get the proper scrolling), but just trying to better understand how it works in order to fix my own problems.

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• How can I pause a BackgroundWorker? Or something similar...

  - by juan

  I was using a BackgroundWorker to download some web sites by calling WebClient.DownloadString inside a loop. I wanted the option for the user to cancel in the middle of downloading stuff, so I called CancelAsync whenever I found that CancellationPending was on in the middle of the loop. But now I noticed that the function DownloadString kinda freezes sometimes, so I decided to use DownloadStringAsync instead (all this inside the other thread created with BackgroundWorker). An since and don't want to rewrite my whole code by having to exit the loop and the function after calling DownloadStringAsync, I made a while loop right after calling it that does nothing but checks for a variable bool Stop that I turn true either when the DownloadStringCompleted event handler is called or when the user request to cancel the operation. Now, the weird thing is that it works fine on the debug version, but on the release one, the program freezes in the while loop like if it were the main thread.

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• problem with facebook api - Keeps redirecting

  - by Megan

  I created an application with a name and connect URL on facebook. I put below code in test.php here (test.php): include_once 'facebook.php'; $fb = new Facebook('api_key', 'secret'); $user = $fb->require_login(); echo $fb->api_client->user; echo $fb->api_client->session_key; when I go to that page, it takes me to facebook login, after I login it redirects me to same test.php with an auth_token. But it doesn't stop there. For some reason, the script is taking me to facebook again and since I already logged in facebook redirecting me to test.php with another auth_token just like below /test.php?auth_token=76a6eb21b872cdfe787ea85a240905dd&auth_token=597d7532bf53c8ce37cc003bcf7d2905 It never stops there, test.php taking me to facebook again and again :( Please tell me what wrong?? Thanks a lot

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• How to indefinitely pause a thread in Java and later resume it?

  - by Carlos Torres

  Maybe this question has been asked many times before, but I never found a satisfying answer. The problem: I have to simulate a process scheduler, using the round robin strategy. I'm using threads to simulate processes and multiprogramming; everything works fine with the JVM managing the threads. But the thing is that now I want to have control of all the threads so that I can run each thread alone by a certain quantum (or time), just like real OS processes schedulers. What I'm thinking to do: I want have a list of all threads, as I iterate the list I want to execute each thread for their corresponding quantum, but as soon the time's up I want to pause that thread indefinitely until all threads in the list are executed and then when I reach the same thread again resume it and so on. The question: So is their a way, without using deprecated methods stop(), suspend(), or resume(), to have this control over threads?

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• Powershell 2.0 error handling - Command line call vs. ISE

  - by Gromix

  Hi, In the context of deployment scripts, I would like to capture any error than happens and stop immediately. I have notice some significant differences between the following calls: powershell.exe -File Script.ps1 powershell.exe -Command "& '.\Script.ps1'" powershell.exe .\Script.ps1 For example, the -File call will handle errors in the exact same way as the ISE. The other two seem to ignore the $ErrorActionPreference variable, and do not seem to catch Write-Error in try/catch blocks. Could someone help me understand the implications of each one, and why they are behaving differently? Thanks, Romain

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• What C#/SQL Server feature did someone show you that made you say Wow!

  - by Randy Minder

  It's late Friday afternoon, and my mind is checking out for the week. So I thought I'd ask a light-hearted, interesting, question. Yesterday a co-worker showed me how he managed to save quite a bit of code and improve code reuse through the use of an anonymous delegate and the use of the Action function. My first thought was, "Wow, I had no idea you could do that!". I'm curious what sort of things someone showed you, either in c# or SQL Server, that made you stop and think, "Wow!". Randy

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• OpenLayers .containsPoint after pan

  - by Adrian

  I've seem to have hit a bug or i have overlooked something. I written some code that enumerates through all the vector features on a OpenLayers Vector layer - to check if the mouse is inside a vector feature - if so then it displays some info based on the feature. I had to write my own methods to do this because the existing OpenLayers Controls( select etc) stop after finding a feature under the mouse, and i the possibility of several features being stacked on top of one another. My problem is that the .containsPoint method seems to be using coords from before a 'pan'. After zooming in or out the geometry seems to be in the right place and .containsPoint is works correctly when I wave the mouse over the map. Do I need to do something after the map has been panned to update something( feature's geometry)

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• Why do socket.makefile objects fail after the first read for UDP sockets?

  - by Eli Courtwright

  I'm using the socket.makefile method to create a file-like object on a UDP socket for the purposes of reading. When I receive a UDP packet, I can read the entire contents of the packet all at once by using the read method, but if I try to split it up into multiple reads, my program hangs. Here's a program which demonstrates this problem: import socket from sys import argv SERVER_ADDR = ("localhost", 12345) sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) sock.bind(SERVER_ADDR) f = sock.makefile("rb") sock.sendto("HelloWorld", SERVER_ADDR) if "--all" in argv: print f.read(10) else: print f.read(5) print f.read(5) If I run the above program with the --all option, then it works perfectly and prints HelloWorld. If I run it without that option, it prints Hello and then hangs on the second read. I do not have this problem with socket.makefile objects when using TCP sockets. Why is this happening and what can I do to stop it?

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• If I want to play the same sound 10 times per second, must I have 10 copies of that sound in memory?

  - by mystify

  I have a sound that needs to get played 10 times per second. The sound is 1 second long. So it does overlap like 10 times. However, as far as I understand the Finch sound library, I would need 10 different instances of a sound in place so that I can play it 10 times at almost the same time. When I have just one instance, the sound would stop and play from the beginning on every iteration, but not overlap with itself. How to do that?

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• pySerial writes to Arduino Uno get buffered

  - by Bhaktavatsalam Nallanthighal

  I have a Python script that writes short messages to the serial port on my Arduino Uno board using pySerial. There is a loop and depending on some conditions, multiple writes can happen within a loop, something like this: while True: #Conditions block 1 if <CONDITION1>: serial.writelines("INIT") elif <CONDITION2>: serial.writelines("NEW") ... #Conditions block 2 if <CONDITION1>: # Fetch something from the Internet serial.writelines("CHECK") elif <CONDITION2>: # Fetch something from the Internet serial.writelines("STOP") ... But, when my Arduino board receives this it receives the first message as INIT, but the second one is being read as INITSTOP or INITCHECK and third one gets concatenated to the previous messages. My arduino program checks for specific message in this way: if(msg.equals("CHECK")) { // Do something } else if(msg.equals("INIT")) { // Do Something else } Can anyone guide me on this? BTW, I don't think the problem is with the Arduino as it works perfectly when I test it with the Serial Monitor available with the IDE. I've tried adding sleeps of upto 10 seconds before every write, but that did not work out.

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• MooTools Fx.Slide throwing this.element is null

  - by Brant

  The following code is throwing the error "this.element is null". However, the wid_cont is definitely grabbing an element. window.addEvent('domready',function(){ var min = $(document.body).getElements('a.widget_minimize'); min.addEvent('click', function(event){ event.stop(); //var box = ; var wid_cont = ($(this).getParents('.widget_box').getElement('.widget_box_content_cont')); var myVerticalSlide = new Fx.Slide(wid_cont); myVerticalSlide.slideOut(); } ); }); It's moo tools 1.2.4 and has the fx.slide included....

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• Problem With HTML5 Application Cache Whitelist - Won't Ignore Items

  - by Ryan Donnelly

  I'm trying to use HTML5 Application Cache to speed some things up on an iPhone webapp. It works great for storing images, css and JS, but the problem is that it also tries to store the HTML. I haven't been able to get it to ignore the html and stop storing it in the cache. From what I've read, I have to "whitelist" the files and directories that I want to load no matter what. I've tried listing the files I want cached explicitly, and I've tried adding a series of things under the "NETWORK:" heading. I've tried * / /* http://mysite.com http://mysite.com/ http://mysite.com/* None of them seem to work. Is there any way to ignore HTML files by MIME-Type or anything? Any advice would be appreciated. Ryan P.S. Of course, my site is not mysite.com..I just used that for simplicity.

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• problem with crawl many url in .net: Server IP not ping. maybe bandwidth or http connection limit ex

  - by Hamid

  Hi to all I develop web crawling service (windows service / multi-thread) . its work fine, but sometimes my server network not response. and i can't ping server IP (from internet), but can ping by other network card (local ip) that not access to internet. after i open server with remote desktop and stop crawling service. i could ping. What's my problem? Bandwidth limit or max connection limit exceed or ??? how to prevent this issue? Note: when this problem occur, i open browser for browse web site, but can't open any website!!! Could you please help me. Thanks in advanced

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• Python and Gstreamer

  - by Seif Sallam

  hi, I'm creating a streaming application, using GStreamer with TCP pipeline, and i implemented start, pause, and stop. but the problem is, that i can't seek, i tried to change the playback value from the server side, then i tried on the client side, and Finally tried to change the value on both at the same time, but in all cases it doesn't work. and I even tried to pause the playback then continue but nothing happens. I'm having this problem with the seek and the volume. Any help please, I searched everywhere but i couldn't find anything that worked. this is the code that i use for seeking self.pipeline.seek_simple(gst.FORMAT_TIME, gst.SEEK_FLAG_FLUSH, time)

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• emacs indentation in asm mode

  - by Gauthier

  I am looking for the equivalent of c-indent-level and ruby-indent-level, for asm-mode. That is, I want to force the indentation to 4 spaces, and I want them to be replaced with blanks. What I've seen tells me it does not exist for asm-mode. Could someone please tell me this is wrong? I tried this also: http://stackoverflow.com/questions/69934/set-4-space-indent-in-emacs-in-text-mode , to no av. I have tried: (setq tab-width 4) (setq indent-line-function 'insert-tab) (setq asm-indent-level 4) This works however: (custom-set-variables '(tab-stop-list (quote (4 8 12 16 20 24 28 32 36 40 44 48 52 56 60 64 68 72 76 80 84 88 92 96 100 104 108 112 116 120)))) But I wonder if there is a way to define that for asm-mode only. What if I wanted to keep the default tab behaviour for other modes?

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• Using 'load' in octave

  - by lollygagger

  Is there a way to tell the load function to only load until a certain line? I want to read in a data file and assign the numbers to an array, however, I want it to stop after it has created a 200 X 200. Could I also do this with a do-while loop and fgetl? When I try to use fgetl(fid, len) and give it 'len', it does not obey :-/ How can I tell octave to ignore the comment lines in an input file? They are '#' characters, so I figured octave would just automatically ignore them, but not so... Thanks.

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• Approaches for memcached sessions

  - by Industrial

  Hi everybody, I was thinking about using memcached to store sessions instead of mySQL, which seemed like a good idea, at first. When it comes to the failover part of utilizing memcached servers, It's a bit worrying that my sessions will stop working if the memcached would go offline. It will certainly affect my users. There's a few techniques that we already utilize to reduce failover, including having a pool of servers available to compensate in the event of downtime, utilizing sharding/consistent hashing across the server pool and so on. We would also do some sort of graceful degradation that tells the users that something have gone wrong and they are welcome to login again, in the event of them being kicked out due to memcached server failover. So how does people generally deal with these issues when storing sessions on memcached servers?

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