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  • Multiple database accesses or one massive access?

    - by DudeOnRock
    What is a better approach when it comes to performance and optimal resource utilization: accessing a database multiple times through AJAX to only get the exact information needed when it is needed, or performing one access to retrieve an object that holds all information that might be needed, with a high probability that not all is actually needed? I know how to benchmark the actual queries, but I don't know how to test what is best when it comes to database performance when thousands of users are accessing the database simultaneously and how connection pooling comes into play.

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  • Syncing apt-get installations between multiple computers

    - by Chris
    Is there a way to synchronize my installations (and removals) between multiple PCs? Preferably with dropbox - since I'm already using that to keep my files in sync. Edit: I thought of an alias for the apt-get install and apt-get remove commands that stores the parameters to a file (one for install, one for remove) and another command that reads all the entries in the file and executes the respective command. Is this an realistic approach?

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  • REPLACE Multiple Spaces with One

    Replacing multiple spaces with a single space is an old problem that people use loops, functions, and/or Tally tables for. Here's a set based method from MVP Jeff Moden. “Thanks for building such a useful and simple-to-use service”- Steve Harshbarger, CTO, 10th Magnitude. Get started with Red Gate Cloud Services and back up your SQL Azure databases to Azure Blob storage or Amazon S3 – download a free trial today.

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  • shared transaction ID function among multiple threads

    - by poly
    I'm writing an application in C that requires multiple threads to request a unique transaction ID from a function as shown below; struct list{ int id; struct list *next }; function generate_id() { linked-list is built here to hold 10 millions } my concern is how to sync between two or more threads so that transaction id can be unique among them without using mutex, is this possible? Please share anything even if I need to change linked list to something else.

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  • Running multiple versions of Firefox [migrated]

    - by redconservatory
    I've been reading this: http://support.mozilla.org/en-US/questions/797010#answer-193690 But it looks like it only applies to running multiple versions of Firefox when it's Firefox 4. I need to run Firefox but it seems like a lot of my clients are still running versions of Firefox 3 (is this an operating system issue? Doesn't Firefox auto-update?) so I need to run 3 plus the latest version to troubleshoot some css issues...

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  • Map multiple functions over a single data item

    - by Linus Norton
    I'm in the process of learning Scala and I came across a scenario today where I need to map multiple functions over a single piece of data and wondered if there was a formal name for this. It sort of feels like the inverse of map. I'm not sure this is the correct way of expressing it, but this is what I did: dmap(x: Object, fns: List[Function]) = fns.map(_(x)) Is there a built in way to do something similar? Is there a formal name for this function?

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  • Multiple joysticks event handling

    - by hbaktir
    I want to make a game which is totally same idea with "Who pressed the button answers the question" I got 2 joysticks and both connected to a pc.My application will be Winforms and i will develop it on Visual studio 2012 . I 've used SlimDX,Sharpx so far i ' ve nothing for multiple joysticks.I can get the pressed button with timer . All i want to know is which joystick / gamepad pressed 1 button first.Then my problem will be solved Any idea how can i achive this or somebody did it before

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  • multiple inheritence in OOPS

    - by user145610
    Hi, Im confused about OOPS feature esp about multiple inheritance. Is OOPS allows Multiple Inheritance. Is Multiple Inheritance is a feature of OOPS. If Multiple Inheritance is feature then languages like C#,VB.NET,java etc doesn't support multiple inheritance.But those languages are considered as strongly supported OOPS language. Can anyone address this question

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  • Powershell script to change screen Orientation

    - by user161964
    I wrote a script to change Primary screen orientation to portrait. my screen is 1920X1200 It runs and no error reported. But the screen does not rotated as i expected. The code was modified from Set-ScreenResolution (Andy Schneider) Does anybody can help me take a look? some reference site: 1.set-screenresolution http://gallery.technet.microsoft.com/ScriptCenter/2a631d72-206d-4036-a3f2-2e150f297515/ 2.C code for change oridentation (MSDN) Changing Screen Orientation Programmatically http://msdn.microsoft.com/en-us/library/ms812499.aspx my code as below: Function Set-ScreenOrientation { $pinvokeCode = @" using System; using System.Runtime.InteropServices; namespace Resolution { [StructLayout(LayoutKind.Sequential)] public struct DEVMODE1 { [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)] public string dmDeviceName; public short dmSpecVersion; public short dmDriverVersion; public short dmSize; public short dmDriverExtra; public int dmFields; public short dmOrientation; public short dmPaperSize; public short dmPaperLength; public short dmPaperWidth; public short dmScale; public short dmCopies; public short dmDefaultSource; public short dmPrintQuality; public short dmColor; public short dmDuplex; public short dmYResolution; public short dmTTOption; public short dmCollate; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)] public string dmFormName; [MarshalAs(UnmanagedType.U4)] public short dmDisplayOrientation public short dmLogPixels; public short dmBitsPerPel; public int dmPelsWidth; public int dmPelsHeight; public int dmDisplayFlags; public int dmDisplayFrequency; public int dmICMMethod; public int dmICMIntent; public int dmMediaType; public int dmDitherType; public int dmReserved1; public int dmReserved2; public int dmPanningWidth; public int dmPanningHeight; }; class User_32 { [DllImport("user32.dll")] public static extern int EnumDisplaySettings(string deviceName, int modeNum, ref DEVMODE1 devMode); [DllImport("user32.dll")] public static extern int ChangeDisplaySettings(ref DEVMODE1 devMode, int flags); public const int ENUM_CURRENT_SETTINGS = -1; public const int CDS_UPDATEREGISTRY = 0x01; public const int CDS_TEST = 0x02; public const int DISP_CHANGE_SUCCESSFUL = 0; public const int DISP_CHANGE_RESTART = 1; public const int DISP_CHANGE_FAILED = -1; } public class PrmaryScreenOrientation { static public string ChangeOrientation() { DEVMODE1 dm = GetDevMode1(); if (0 != User_32.EnumDisplaySettings(null, User_32.ENUM_CURRENT_SETTINGS, ref dm)) { dm.dmDisplayOrientation = DMDO_90 dm.dmPelsWidth = 1200; dm.dmPelsHeight = 1920; int iRet = User_32.ChangeDisplaySettings(ref dm, User_32.CDS_TEST); if (iRet == User_32.DISP_CHANGE_FAILED) { return "Unable To Process Your Request. Sorry For This Inconvenience."; } else { iRet = User_32.ChangeDisplaySettings(ref dm, User_32.CDS_UPDATEREGISTRY); switch (iRet) { case User_32.DISP_CHANGE_SUCCESSFUL: { return "Success"; } case User_32.DISP_CHANGE_RESTART: { return "You Need To Reboot For The Change To Happen.\n If You Feel Any Problem After Rebooting Your Machine\nThen Try To Change Resolution In Safe Mode."; } default: { return "Failed"; } } } } else { return "Failed To Change."; } } private static DEVMODE1 GetDevMode1() { DEVMODE1 dm = new DEVMODE1(); dm.dmDeviceName = new String(new char[32]); dm.dmFormName = new String(new char[32]); dm.dmSize = (short)Marshal.SizeOf(dm); return dm; } } } "@ Add-Type $pinvokeCode -ErrorAction SilentlyContinue [Resolution.PrmaryScreenOrientation]::ChangeOrientation() }

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  • Is there a good dual monitor arm solution for iMac 27" i7s?

    - by Darren Newton
    I currently have an iMac 27" and am considering purchasing another to run in target display mode. My desk space is a little limited. Is there a dual monitor arm solution that can support the weight of two iMac 27" units (30.5 pounds (13.8 kg)) as well as their width (25.6 inches (65.0 cm)) in a side-by-side landscape configuration? I looked at the Ergotron LX Dual Side by Side but the iMacs appear to exceed the width and weight limit this device is rated for. I'm open to alternate solutions to arms, such as a multi-unit desk stand/mount, but a wall mount is not possible for me at this time. Thanks!

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  • Dual DVI and VGA Out

    - by Michael
    I am wanting to add a third monitor with one graphic card. I have been told that a DVI to Dual DVI will display separate views. Right now I do DVI and VGA out. If I get a DVI to Dual DVI out will my VGA still work? Thanks

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  • KVM recommendations

    - by alex
    I recently tried out a cheaper KVM solution, a dual monitor one with a USB hub and audio/mic support. It seemed the perfect KVM. However, these are my experiences. When using my keyboard via the PS/2 connection, none of my multimedia keys work (useful, because it has a volume control and my speakers do not, only on a wireless remote control.) I plugged the keyboard in via the USB port - and it seemed to work. However, I believe to switch the hub from PC to Mac, you need to use a keyboard combo, which is only supported when the keyboard is plugged in via PS/2 Sometimes the middle mouse button doesn't work when connected via PS/2. The multi monitor is VGA - I just found out by the looks of things my Mac Mini outputs DVI Digital only (though this is my fault!). Mac works with 2 screens, but switching and switching back can cause it not to display on the 2nd screen unless I go detect displays again. My question is - is there a KVM out there that supports these features? USB keyboard and mouse inputs will full multimedia keys support Dual monitor DVI connections Hotkey to change PCs and physical button USB hub Emulate screens attached when switching to a different computer Works with PC and Mac Audio / Microphone support Does one exist, that won't cost the world? So far the only one that seems to support all this (that I can tell) is this one. UPDATE I ended up buying the Aten CS1642. It's expensive, but it seems to work great!

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  • MacBook Pro + OSX Lion + Samsung SA550 HDMI not playing nicely

    - by rabbid
    I bought a Samsung SA550 monitor as a second monitor for my 2009 MacBook Pro that is running OSX 10.7 Lion. The monitor has 2 outputs, VGA and HDMI. If I connect using VGA everything is fine. If I connect using HDMI-DVI cable, and DVI-to-mini display converter I get static and flickering: The DVI-to-mini display converter that I use: I have used this converter with a different monitor that had a DVI output port a while ago, so at least it used to work once upon a time. I am not sure if this problem is because of that converter or not. I have never used a monitor with an HDMI output before. Appreciate your help. Thank you!

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  • Restore monitor detection to one only or restore start menu to bottom

    - by Mark
    I have a co-worker that is no longer able to see his start menu. He used to have it pinned to the left edge of his screen. I tried to troubleshoot it a bit and discovered if we do Windows + R then "cmd" [enter] the command prompt opens (but we don't see the start menu or run box), meaning the start menu is somewhere, just off screen. Restarting doesn't help. Is there some way to force Windows to think it only has a single monitor? It seems to "think" it has two but there's only one and we can get the Start menu back. Or, is there a way to restore the start menu to the bottom? Additional info We are able to right-click the desktop for display settings, etc. We can also get into Windows Explorer (via Ctrl + E) so if we need any of that to restore settings we can do it.

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  • Cannot increase monitor refresh rate on second monitor

    - by Seany84
    I just purchased an Asus VG248 monitor (supports 144Hz refresh rate) and I can not increase the monitor's refresh rate beyond 60Hz from Windows. My system setup: 2x AMD 6990 graphics cards 1x Asus VG236 connected via DVI cable to graphics card #1 DVI port #1 (120Hz) 1x Asus VG248 connected via DVI cable to graphics card #1 DVI port #2 (60Hz) Does anyone know why I can not set the new monitor to a higher refresh rate?

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