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• Is it possible to listen to relational database update?

  - by Morgan Cheng

  Is it possible to listen to relation database update? For example, my web app want to send data update to client through Comet technology. I can have the program to poll the database periodically, but that would not be performant and scalable. If app can hood to a "event handler" of database, then app can get notification every time given database table data is updated. This sounds more promising, but I didn't find any concrete example for it. This is listener pattern. Does common relational database support such feature?

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• Is it possible to detect that a database connection is to a copy rather than to the original database?

  - by user149238

  I have an application that needs to know if it is connected to the original database that it was installed with or if the connection is to a copy of that database. Is there any known method to know if the database has been cloned and the application is no longer connected to the original? I am specifically interested in MS SQL Server and Oracle. I was kicking ideas around for a stored procedure but that most likely doesn't have access to the hardware to confirm unique hardware information that would somewhat guarantee that the database is the one that it was originally connected to during installation. I'm trying to prevent/detect cloning of a database so that there is only 1 "true location of truth". Thanks!

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• Is it technically possible to read CD by its scan?

  - by Kuroki Kaze

  Lets say we have image of CD (from scanner). Can we technically read it? What DPI is needed?

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• Is it possible / recommendable sending HTML emails containing Javascript?

  - by Adriano Varoli Piazza

  This is mostly a rhetorical question, as far as I've checked the answer is 'don't even bother', but I wanted to be really sure. We have an email app, where you can send email to lists of subscribers. This is not spam: it's used, for example, by an university to send communications to its students, by a museum to send emails to subscribers, etc. Recently, I was asked by a prospective client if it was possible to send html messages containing javascript without being marked as spam. Not knowing, I did a short trip of the webs and what I've got is (percentages out of my posterior) 'half the clients won't display properly', 'half the clients will flag you as spam' and 'half the clients will have blocked javascript altogether' (There's clearly some superposition). So the best solution seems to be adding a link to a proper page if really necessary. Have you got a different experience? Do you know of any email-merge solution that provides this feature? Do you know if specific clients accept it or refuse to display html with javascript?

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• Is it possible/advisable to run VMware Server ESX/ESXi on a laptop?

  - by cletus

  The idea of having a small footprint hypervisor as the primary OS on a laptop or desktop where every "real" OS is a guest appeals to me. Now I realize this software is more typically used on blades and the other servers but can it be done on a normal PC? Should it be? What requirements are there (eg hardware/BIOS/chipset)? Is there a performance impact for doing so? Is it a good/bad idea?

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• Is it possible to check a MP3 for data corruption?

  - by Chris

  I was listening to some older mp3s today and I released that some of my songs have pops and cracks in them. I assume this means that the file has some bad blocks. Is there software/script/etc that I can run on my entire library and find the music with these artifacts? Thanks!

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• Is it possible to replace the Logitech G500 wire without rebuying the mouse?

  - by leladax

  It has to be replaced ideally in whole, from the point it starts inside the mouse (with a white 4-5 piece of wires connection) to the end (of the USB connector to the computer) or at least to a considerable length because there is fatigue very near the mouse and the more I fix it there with soldering the closer it gets to being unfixable or reaching towards 'inside' the mouse where fixing it will be hard or impossible. So I wonder if there is a way to get a replacement of the whole thing or at least the inside-the-mouse connector to a certain length. Also I wonder if other mice types are identical in the connector of the inside.

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• Is it possible to create nested classes in PHP as it is in C#?

  - by Edward Tanguay

  In C# you can have nested classes like this, which are useful if you have classes which do not have meaning outside the scope of one particular class, e.g. in a factory pattern: public abstract class BankAccount { private BankAccount() {} private sealed class SavingsAccount : BankAccount { ... } private sealed class CheckingAccount : BankAccount { ... } public BankAccount MakeSavingAccount() { ... } public BankAccount MakeCheckingAccount() { ... } } Is this possible in PHP? I've read that it was planned for PHP 5, then cancelled, then planned again, but can't find definitive info. Does anyone know how to create nested classes (classes within the scope of another class) as in the above C# example using PHP 5.3?

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• Upgrading HP DL185 G5 8LFF, is using a Dell J1520 4-Drop SATA Adapter possible?

  - by jpreed00

  The HP DL185 G5 8LFF model supports 8 3.5" drives and 1 optical drive. However, instead of the optical drive, I'd like to have 2x 2.5" drives instead. The problem is that the PSU has no more SATA power cables (even though the motherboard has 4 additional SATA data ports). The PSU does have a free 10-pin connector and it looks like the J1520 cable from Dell would fit the bill. Link to cable description Does anyone have any experience using these cables? Are they safe? Any other ideas for adding the disks to the server if I don't use the cable? Thanks!

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• Outlook + Exchange 2007: it is possible to rid of local OST files?

  - by kdl

  I am looking for a solution which would allow to use a convenience of Outlook as a mail client app while at the same time have no PST or OST files on a local computer. Even in 'non-caching' mode Outlook creates an OST file where it downloads everything from the Exchange server. OWA does not create any local files (except cookies I believe) but lacks some of the nice features Outlook has. Would it be feasible to place OST files on a network share? Maybe the solution exists for some other client+server pair?

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• Is it possible to dynamically set a static string during *class* Initialisation?

  - by LonnieBest

  I'm trying to dynamically create a connection string during compile time: public static string ConnectionString { get { string connectionString = @"Data Source=" + myLibrary.common.GetExeDir() + @"\Database\db.sdf;"; return connectionString; } } I keep running into type initialisation errors. I was trying to avoid having to set the connection string for all applications that user my code library. The location of the database is different for each project that uses the library. I have code that can determine the correction string, but was wanting run it during compile time. Is this even possible?

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• Suggestion of device WiFi range in it's spec. Possible?

  - by SeeR

  I have router Draytek Vigor 2100VG at home almost in the center of it. The farthest point at my home is my balcony, ~12m from it. I have constant wifi signal range problems with some of my devices, but not with others. Notebook Lenovo W510 - no problems Nokia Home Music - always on 10m - no problems Sony PS3 - always on 7m - no problems Sony tablet S - problems around 6m Sony PSP - problems around 8m Sony PS Vita - problems around 8m Nokia E63 - problems around 8m I'm curious why my Notebook don't have any problems even on the balcony? I guess it has better hardware or uses more power for transmission. This information is really important when you want to buy new device/computer, so my real question is: Can device wifi range can somehow be found/suggested from official hardware technical specification? If not Is there some web page with wifi range reviews?

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• Is it possible the generate shared objects using JAXB?

  - by Peter Szanto

  I have 3 xsd files: a.xsd b.xsd shared.xsd shared.xsd is imported to both a.xsd and b.xsd using <xs:import schemaLocation="shared.xsd"/> shared.xsd defines <xs:element name="item"> <xs:complexType> .... If I generate java code using xjc a.xsd and b.xsd is generated into different packages and in each package a separate java class is generated for item. How would it be possible to have a single shared class for item and make a and b use it?

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• Is it possible to implement Flex states in Android application.

  - by barmaleikin

  Hi guys, Let me explain what I am want to archive. For example, in Flex I can create page (list of something) with 3 states: Loading state (just display some animation or label with text "Please wait."), No records state (page with text saying that there is no records) and Page with populated list. It is very easy to operate with states in Flex. Is it possible to implement something similar in Android application? I would appreciate if you provide some examples.

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• What service can hold CPU at lowest frequency possible when on battery load under Ubuntu?

  - by vava

  When I'm running on battery even with "performance" frequency scaling governor, something regularly lowers CPU speed to it's lowest value. I don't really want that, my AC strip usually in another room so I don't really need to save power. How can I find what service doing that? laptop_mode is disabled so that's not it. Update: Looks like CPU being scaled down only if it is under load. If it is more or less idle, it could stay on any frequency pretty much forever, but once it gets loaded, it quickly jumps to it's lowest frequency. Another update: Something sets maximum frequency CPU can have. Ubuntu launchpad bug 242006

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• Is it possible to run C++ binded with SDL+OpenGL code on a web browser?

  - by unknownthreat

  My client wants her website to have an application that renders 3D (light 3D stuff, we are drawing only flat squares in 3D world) but web programming is not my thing. So I am looking for something that can run a C++ program from a web browser. But I think, if this is the case, then the client side must download the program first, and that's not what I want. The client should only be able to use this application only on the website. I came across Google Native Client, which claims that it can run x86 native code in web applications. I haven't decide whether it is worth it or not and I don't know whether this is what I want or not, so I decided to ask experienced people about this. If I want to have something like this, is what I said above possible? Or I completely need other languages like Flex because it does not worth the trouble? Or is Google Native Client suitable for doing something like this?

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• Is it possible to build a Mac binary on a non-Mac unix machine?

  - by nbolton

  I would like to set up a Mac buildbot slave, but unfortunately it's not possible to install Mac OS X 10.5 on my XenServer hypervisor. So, I've had an idea, but not quite sure whether or not it'll work. The application is C++, and on Mac it's compile using GNU Make. I have a Mac desktop PC, and I was hoping I could copy the .h and .lib files on to a Linux box, and try to build against the Mac headers: #include <mach-o/dyld.h> #include <AvailabilityMacros.h>

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• Is it possible to use a dual processor computer as your desktop?

  - by Ivo Flipse

  I've seen some people suggesting to get a motherboard that supports two processors and stick two Xeon Nehalem processors in it. Could you use this system as a desktop PC or is this useless or even impossible? It's more hypothetical question if Windows 7 would support such a set-up. I know you could just take an i7, but wouldn't two of those processors be a whole lot more awesome? Like the previous generation Skulltrails? The idea would be to have a motherboard like this ASUS Z8NA-D6C Dual LGA 1366 Intel 5500 ATX and two Xeons (since I don't think i7's could be used) Intel Xeon E5405 Harpertown to run something like Windows 7 Ultimate.

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• Is it possible to have tab completion of drop-down lists in web pages in Firefox?

  - by Nick Booker

  Does anyone know of a Firefox plugin that would enable tab-completion (or some other key sequence like Alt-L) of items in drop-down lists in web forms? e.g. ou<TAB>in<TAB>s<TAB> for 'OurCompany - Internal Support' Vimperator's hints mode makes it very ergonomic to focus the drop-down list with a key sequence like f13 but the keyboard interface to the drop-down list still sucks. I very frequently have to pick items from a very long list with very long common prefixes among the entries (e.g. 30-40 starting with OurCompany -), which renders both the built-in keyboard interface and the mouse pretty slow and unergonomic. I basically want readline support for filling webforms!

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• Connect USB hard drive to wireless router on RJ45 port? Possible?

  - by lawphotog

  just a quick story behind. I was trying to set up wireless networked hard drive at home. My wireless router doesn't take USB. I am considering few options. First i was considering to get something like WD My Cloud. My router is an old one provided by service provider. It only has 10/100 Ethernet. WD My Cloud has Gigabit interface. So unless i changed a new router, data transfer will be slow. So upgrading the router is a must if i want fast transfer speed. Plus I already own an external hard drive with USB 3.0 interface. So if I get a router like Netgear D6300, i can get a decent speed wireless shared drive at home. And i can use my existing HDD instead of WD My Cloud. But the router isn't cheap so I am saving up for that. In the meantime I found out the existence of USB to RJ45 adaptor. I read the reviews and some say it works for them and for some don't. They didn't really say what they were trying to do so I'm confused. So if i bought an adaptor like this, can i connect my existing HDD (USB) with my existing router (RJ45) and use it as a shared drive for data transfer? I know it will be slow as the adaptor will only have USB 2.0 and 10/100 for Ethernet. But it's fine as it's for temporary until i got my new router.

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• Is it possible to route *.example.com to a single machine without registering extra domains?

  - by oligofren

  I would like to achieve something similar to what wordpress.com does - giving each user its own subdomain. user1.wordpress.com would in the VirtualHosts setup of Apache would have its DocRoot at /user/user1, for instance. Now, our hosting service provider takes a fee for creating a domain, and in our case this would mean a ridiculous number of domains with a matching price. After some googling on DNS I came over a description of a DNAME record. That seems to fit the bill precisely. Any reason why my service provider would not do this, or why I should not do this?

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• Is it possible to impersonate another WAP by intercepting communication with other client?

  - by OSX NINJA

  There is a well known WAP that lots of people use. Someone comes in with a laptop equipped with a sniffer. The laptop sniffs people trying to log on to the WAP. It intercepts the connection, and when people try to log on to the WAP, they unknowingly log on through that person's laptop instead. All communication between the WAP and people's laptops go through that person's laptop. That person's laptop is able to block access to certain websites that the WAP would normally allow.

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• Is it possible to create a simple frontend indexer for openbittorent torrents?

  - by SimonK

  I run a website which distributes a few files every now and again, live music performances by a rock band. I create a torrent file, set the trackers as openbittorrent, publicbt and other similar open trackers. I upload the torrent file to my forum, my users download it and the files are shared. No problems there. What I would like to do is index those torrents properly on my website though so I can follow seeders/leechers and other stats online. I know the open torrent trackers don't have an index but I am aware of many, many indexing sites that do that exact thing. I don't know how though. So what I'm asking is what do I need to do to do that myself? I simply want to create a page that lists the torrents I and other users on my site create, the seeders/leechers ratio and a link to the torrent file etc. What data do I need to be able to do that? I'm proficient in general web design but I don't know what I would need data wise to pull the required info on the torrents? Thanks

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• Is it possible to position an element relative to the border-box of its parent?

  - by Timwi

  Consider the following jsfiddle for reference: http://jsfiddle.net/apmmw2ma/ As you can see, the “inner” box (with the red border) is positioned relative to the outer’s padding-box: left:0 positions it just to the right of outer’s border, and top:100% appears to mean “100% of the content plus padding, but not the border”. Unfortunately, adding box-sizing: border-box to the outer div seems to have no effect. I want to position a child element directly below its parent’s border-box, i.e. the two borders should abut no matter how thick they are. Is this possible?

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• Is it possible to cast the Elapsed Time function to Integer?

  - by nuvio

  I have the following function: (def elapsedtime (with-out-str (time (run-my-function)))) and I was wondering if is possible to store only the integer value of the time, as I can only store a String at the moment.... Any suggestion? Thanks a lot UPDATE So I did use this: (defmacro nsecs [expr] `(let [start# (. System (nanoTime))] ~expr (- (. System (nanoTime)) start#))) And then modified this: (def elapsedtime (nsecs (run-my-function argument1 argument2))) but doesn't work, what am I doing wrong? "Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: Wrong number of args (1) passed to: main$fn--105$nsecs"

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