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  • AS3 Memory management when instantiating extended classes

    - by araid
    I'm developing an AS3 application which has some memory leaks I can't find, so I'd like to ask some newbie questions about memory management. Imagine I have a class named BaseClass, and some classes that extend this one, such as ClassA, ClassB, etc. I declare a variable: myBaseClass:BaseClass = new ClassA(); After a while, I use it to instantiate a new object: myBaseClass = new ClassB(); some time after myBaseClass = new ClassC(); and the same thing keeps happening every x millis, triggered by a timer. Is there any memory problem here? Are the unused instances correctly deleted by the garbage collector? Thanks!

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  • What are annotations and how do they actually work for frameworks like Spring?

    - by Rachel
    I am new to Spring and now a days I hear a lot about Spring Framework. I have two sets of very specific questions: Set No. 1: What are annotations in general ? How does annotations works specifically with Spring framework ? Can annotations be used outside Spring Framework or are they Framework specific ? Set No. 2: What module of Spring Framework is widely used in Industry ? I think it is Spring MVC but why it is the most used module, if am correct or correct me on this ? I am newbie to Spring and so feel free to edit this questions to make more sense.

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  • Mahout Recommendations on Binary data

    - by Pranay Kumar
    Hi, I'm a newbie to mahout.My aim is to produce recommendations on binary user purchased data.So i applied item-item similarity model in computing top N recommendations for movie lens data assuming 1-3 ratings as a 0 and 4-5 ratings as a 1.Then i tried evaluating my recommendations with the ratings in the test-data but hardly there have been two or three matches from my top 20 recommendations to the top rated items in test data and no match for most users. So are my recommendations totally bad by nature or do i need to go for a different measure for evaluating my recommendations ? Please help me ! Thanks in advance. Pranay, 2nd yr ,UG student.

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  • Storm Trident 'average aggregator

    - by E Shindler
    I am a newbie to Trident and I'm looking to create an 'Average' aggregator similar to 'Sum(), but for 'Average'.The following does not work: public class Average implements CombinerAggregator<Long>.......{ public Long init(TridentTuple tuple) { (Long)tuple.getValue(0); } public Long Combine(long val1,long val2){ return val1+val2/2; } public Long zero(){ return 0L; } } It may not be exactly syntactically correct, but that's the idea. Please help if you can. Given 2 tuples with values [2,4,1] and [2,2,5] and fields 'a','b' and 'c' and doing an average on field 'b' should return '3'. I'm not entirely sure how init() and zero() work. Thank you so much for your help in advance. Eli

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  • apache requests failing

    - by Josh
    I'm trying to figure out why sometimes the client fails to load objects/requests from a dynamic page served from Apache/MySql/Debian machine. Let's say 13 objects are to be loaded for a total of 185.3 KB load, with no external objects (no DNS lookups) and no other traffic at the same time, randomly some of those object do not load. However, if I perform a refresh, sometimes all of them load or some might fail again. I only have 1Mbps/up and my DNS is been hosted externally (everydns). What could be the reason of this issue? Any comments will be appreciated.

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  • Restore files from certain increments using Duplicity

    - by luckytaxi
    Given the following backup sets ... Found primary backup chain with matching signature chain: ------------------------- Chain start time: Tue Jun 21 11:27:26 2011 Chain end time: Tue Jun 21 11:27:59 2011 Number of contained backup sets: 2 Total number of contained volumes: 2 Type of backup set: Time: Num volumes: Full Tue Jun 21 11:27:26 2011 1 Incremental Tue Jun 21 11:27:59 2011 1 If i run the following command, it works (1308655646 was converted from Tue Jun 21 11:27:26 2011): duplicity --no-encryption --restore-time 1308655646 --file-to-restore ORIG_FILE \ file:///storage/test/ restored-file.txt However, if I run the following command, it restores the from the latest set. duplicity --no-encryption --restore-time 2011-06-21T11:27:26 --file-to-restore \ ORIG_FILE file:///storage/test/ restored-file.txt What am I doing wrong w/ the time? I prefer the second option only because I don't want to have to do the conversion manually.

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  • What does Libre Office do to an existing Excel sheet to bloat its size?

    - by Sn3akyP3t3
    I try to avoid using Libre Office on existing Excel created workbooks because of the potential for unpleasant results. In this case Libre Office bloated the size of the workbook for some reason unknown to me. I would like to know if Libre Office does this to all Excel workbooks or just something in that workbook that causes it. Software involved: Microsoft Office Excel 2010 Libre Office 3.5.x (exact version unknown) Dropbox (merely to sync changes) Platforms involved: Office on Windows (master of the obvious on that one I suppose..) Libre Office on Mac OS 10.6 Types of data stored in this workbook: Text Integers 1 column with a simple formula spanning the entire worksheet representing that particular row (=CONCATENATE(A2285,B2285,D2285), =CONCATENATE(A2286,B2286,D2286), etc.) Total of 3,500 plus rows Here is a photo with details described within, but I'll go ahead and explain the photo as well: This screenshot is from Dropbox history of the .xlsx workbook. Version 61 - 68 were Office Excel. Version 69 - 73 were Libre Office.

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  • How to efficiently dump a huge MySQL innodb database?

    - by Jagbir
    I got an Ubuntu 10.04 production MySQL database server where total size of database is 260 GB while size of root partition is itself 300 GB where DB is stored, essentially means around 96% of / is full and there's no space left for storing dump/backup etc. No other disk is attached to server as of now. My task is to migrate this database to other server sitting in different datacenter. Question is how to do that efficiently with minimum downtime? I'm thinking in line of: Request to attach an extra drive to server and take a dump in that drive. Transfer dump to new server, restore it and make new server slave of existing one to keep data in sync When migration is needed, break replication, update slave config to accept read/write requests and make old server read-only so it won't entertain any write requests and tell app developers to update there config with new IP address for db. What's your suggestions to improve this or any alternate better approach for this task?

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  • Which SATA controller is better to use with Windows Server 2008 R2 64 bit?

    - by at8eqeq3
    We're preforming some hardware upgrade on our server machines. As a part of this process, we have to install some additional disk drives. Unfortunately, total number of drives will become 7 or 8, while all of our motherboards have only 6 SATA ports. Obviously, we need additional disk controllers. For now, we've tested Silicon Image (actually, no-name) and Adaptec controllers, both on SiI3132 chip, and got some problems with drivers for them: Silicon Image drivers are not installing at all, and Adaptec ones are installing, but the system says they're not signed and becomes unbootable. We're tryed both drivers from controllers' CD's and latest versions from manufacturers' websites, and no luck. So, can you recommend some SATA controllers that will really work without tambourine dances on mentioned OS (we need just 2 SATA ports and PCI-E, while RAID and any other features are no-matter)? Thanks for any help.

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  • Do large folder sizes slow down IO performance?

    - by Aaron
    We have a Linux server process that writes a few thousand files to a directory, deletes the files, and then writes a few thousand more files to the same directory without deleting the directory. What I'm starting to see is that the process doing the writing is getting slower and slower. My question is this: The directory size of the folder has grown from 4096 to over 200000 as see by this output of ls -l. root@ad57rs0b# ls -l 15000PN5AIA3I6_B total 232 drwxr-xr-x 2 chef chef 233472 May 30 21:35 barcodes On ext3, can these large directory sizes slow down performance? Thanks. Aaron

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  • Share java object between two forms using Spring IoC

    - by Vladimir
    I want to share java object between two forms using Spring IoC. It should acts like Registry: Registry.set("key", new Object()); // ... Object o = Registry.get("key"); // ... Registry.set("key", new AnotherObject()); // rewrite old object I tried this code to register bean at runtime: applicationContext.getBeanFactory().registerSingleton("key", object); but it does not allow to rewrite existing object (result code for checking and deleting existing bean is too complicated)... PS I am Java newbie, so mb I am doing it wrong and I should not use IoC at all... any help is appreciated...

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  • rsync does't work

    - by jspooner
    I set up a new ec2 ubuntu server and I'm unable to use rsync to push a file up. I can ssh to the machine with my keypair. I'm not sure why this looks like it works but finishes in half a second and there is nothing in /home/ubuntu on the server. ? ~ rsync -av -i ~/.ec2/my-keypair ~/Downloads/pushcom.2012-06-26T01-10-04.gz [email protected] building file list ... done >f..t.... gsg-keypair >f..t.... pushwoodcom.2012-06-26T01-10-04.gz sent 3624 bytes received 64 bytes 7376.00 bytes/sec total size is 3392 speedup is 0.92 I've tried 50 different ways of the rsync command but I can't get anything to work. Please help! Thanks

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  • Looking to eventually build a smartphone app...

    - by Brian L
    Hi all- I'm a young, inexperienced programmer (I've had a year of Java, some MATLAB, and HTML/CSS in school) but I've decided that to get better, I'm making it my goal to produce a simple smartphone app of some kind this year- probably either webOS or Android since I'm on a PC and can't afford a Mac just to write an iPhone app. So my question is, where do I start? I've read the threads about How to Write for Android and such, but I'm not sure I have enough Java experience to just jump right in. And then there's webOS which is based on JavaScript, correct? I guess I'd just like some input from more experienced folks. I have some Barnes and Noble book credit I'm looking to get rid of too, so if there's a guide you think would be useful, feel free to request. tl;dr: Programming newbie ultimately wants to build a simple smartphone app. Where do I start?

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  • Reenabling the Spotlight Menubar item in Mac OS X 10.6

    - by Tim Visher
    I believe I followed the instructions here to disable Spotlight indexing and remove the menubar item. I reenabled indexing just fine, but when I changed the permissions back to 744, the spotlight search position came back (as in the space it would normally occupy), but the actual icon and search box will not show up. If I click that portion of the screen I get a blue box, but I can't type anything in to anything. Currently, permissions look like this: [~]$ ll /System/Library/CoreServices/Search.bundle.bak/Contents/MacOS/ total 648 -rwxr-xr-x 1 root wheel 835K Sep 17 14:48 Search* ll is an alias mapped to the following alias ll='${LS_PREAMBLE} -hl' with $LS_PREAMBLE [~]$ echo $LS_PREAMBLE ls -GF (Ignore the .bak extension. I decided that until I found a way to fully restore it, I would just remove it entirely following the directions here) That looks right to me and obviously something is launching, but the UI elements aren't there. So how can I restore it? Thanks in advance!

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  • Need an alerting system if my cloning script fails

    - by rahum
    I've configured a nightly rsync to mirror one server to a standby offsite backup server. The total datastore on the primary is 1.5TB. In the course of getting this working, I ran into numerous instabilities with the environment, which I seem to have sorted out, but even though it's now working, I am still nervous. This is intended to be a disaster-scenario standby server, and if disaster strikes and the standby does not have all the proper data synchronized, I'm out of a job. Thus, I want to script a system that will confirm, after each nightly sync, that the destination data matches the source. I realize that rsync does this, but if rsync doesn't complete fully (which was happening during the setup troubleshooting), I need to know. Any suggestions? I'm best with Ruby, if that is relevant for the solution.

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  • I found a some bad sectors with chkdsk. Should I be worried?

    - by mottalrd
    Yesterday I found a corrupted file in my external usb drive. Since I am using the drive quite often (I am running my vms over there) I decided to run the chkdsk on it This is the result 488384000 KB of total space on disk. 351202364 KB in 1042390 file. 489920 KB in 81101 indexes. 16 KB in damaged sectors. 1204584 KB in use. 65536 KB used from the registry. 135487116 KB available on disk. therefore it has found 16KB of damaged sectors. Now the file is recovered Should I be worried about the HD and run chkdsk periodically from now on?

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  • Optimal Disk Setup for OLTP SQL Server

    - by Chris
    We have a high transaction (lots of reads and writes) database server (running SQL 2005) that is currently set up with a RAID 1 OS partition (C:) and a RAID 5 data/log/tempdb partition (D:). The C: has 2 drives and the D: has 4 drives. The server has around 300 databases ranging from 10MB to 2GB in size. I have been reading up on best practices for partioning the disks, but would like some opinions on our setup since we are so limited in the number of disks. It seems like RAID 10 is popular, but I dont think we could use it with only 6 total disks to work with. Thanks. Update I went with 3 RAID 1 Partitions (2 disks each) Partition 1: OS, TempDB, Backups Partition 2: Logs Partition 3: Data

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  • Burn more than one ISO to one dvd?

    - by Doug
    I just turned 11 CDs with a total of 1gb of stuff into ISOs. Is it possible for me to just burn all the ISO videos into a DVD? Any alternative way for me to do it? Edit: I need to be playable on any DVD player. It's videos for my grandparents. Update: I read that DVD shrink should work (re-authoring software), but I didn't try it because when I imported the VIDEO_TS folders into the software, my video wasn't played widescreen, and I dont' know how to fix it.

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  • Default Webcam Driver Issues

    - by Omegaclawe
    I'm having troubles getting my monitor-attached webcam (ASUS VK248H) to install on my new computer. On the old computer, it was a matter of not using a USB 3.0 port, but I can't get anything to work on the new one. I have tried all manner of uninstalling/reinstalling the driver and resetting the computer, as well as literally every USB port on the computer (14 in total). It's not that windows isn't recognizing the device; it most certainly is. However, comparing it to the old computer's driver details, on the new computer, it is not using the ksthunk.sys driver in addition to the usbvideo.sys driver, like on the old (working) computer. Naturally, I figured the way ahead was to simply get this other driver to work with the hardware, but haven't really found out a way to do that. Does anyone know of a way I can force it to use ksthunk.sys? It seems rather difficult to get it to install anything when Windows is feeling that everything is peachy.

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  • How do I modify the -encoding argument to javac in the Android Ant build system

    - by Paul Butcher
    Apologies if this is a stupid question - I'm an Android and Ant newbie. I have utf8 encoded source files that I need to compile with the Android Ant build system. By default, the encoding is set to ascii. I'd be very grateful for a pointer to whatever I need to do to let the build system know that my files are utf8. Incidentally, it works fine if I build in Eclipse, but I need to build from the command line. Thanks!

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  • Best Configuration For Youtube HD 720p

    - by Eray Alakese
    Hello, I'm recording a screencast with CamStudio . My computer's screen resolution is 1280*800 , so video's resolution is 1280*800, too. I'm using Microsoft Video 1 codec when recording. I was record 9 minutes video and this video's size is 214 MB . I will upload this video to Youtube. I'm coding a web site at the video, because of this, video must be quality (720p) . I want to reduce file's size, before upload . I'm using Total Video Converter . But when i convert to FLV , video's size increase to 250MB :) I don't know, how can i configure this setting and which file type should i choose.

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  • School Project for final year

    - by pundit
    Hi people, I'm in final year of my degree and it is required that i do a final year project. I have decided to do something on adaptive websites that implements customisation, personalisation and basically adaptation via heat maps and weblogs. So for a prototype i would be designing a website for tertairy level students and see if these technologies improve the usbability of the site. i would model it after my school's website. So here's the question, What would be a better language to use.. i have some knowledge in struts 2 framework and some knowledge in php. could say a newbie at both.. so i was wondering what would be the easier and faster way to go. php or the struts2 framework? thanks.

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  • ajax/jquery disables links after submit

    - by Chocho
    i am working on this form. i am using lightbox and dhtml fade effects. the content in my lightbox is a form. i am using jquery to validate the form. once the form is submitted, i redirect a user back to a thank you page. what i am noticing is that, once all the above events has taken place, i cannot click anywhere on my screen, all the links/buttons are sort of disable. i need to press F5 to refresh the page to be able to click anywhere on the page again? is this happening because i am using jquery validation and an events already took place, how do i resolve this as i am a newbie to jquery. thanks

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  • Calculating terrain height in 3d-space

    - by Jonas B
    Hi I'm diving into 3d programming a bit and am currently learning by writing a procedural terrain generator that generates terrain based on a heightmap. I would also want to implement some physics and my first attempt at terrain collision was by simply checking the current position vs the heightmap. This however wont work well against small objects as you'd have to calculate the height by taking the heightdifference of the nearest vertices of the object and doing this every colision check is pretty slow. Beleive me I tried googling for it but there's simply so much crap and millions of blogs posting ripped-of newbie tutorials everywhere with basically no real information on the subject, I can't find anything that explains it or even names any generally used techniques. I'm not asking for code or a complete solution, but if anyone knows a particular technique good for calculating a high-res heightmap out of the already generated and smoothed terrain I would be very happy as I could look into it further when I know what I'm looking for. Thanks

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  • Serve my website from different server during downtime

    - by nfedyashev.mp
    I have a VPS server running in the cloud. Fully automated server image upgrade/downgrade(by RAM/HDD plans). The problem is that server upgrade/downgrade takes time and involves total unavailability during this period(up to 30 minutes). Goal: during this downtime server my website(http://mydomain.here) from different server with some message like "Under construction". How can I do this? -- mydomain.here is hosted on godaddy and uses its DNS(If I call it right). It's pointing with A-record to my VPS's IP address now. Change in these DNS settings will take more than 30minutes, so it's not an option. How can I find mode "dynamic" DNS? What should I learn?

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