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  • python / sets / dictionary / initialization

    - by Mario D
    Can someone explain help me understand how the this bit of code works? Particularly how the myHeap assignment works. I know the freq variable is assigned as a dictionary. But what about my myHeap? is it a Set? exe_Data = { 'e' : 0.124167, 't' : 0.0969225, 'a' : 0.0820011, 'i' : 0.0768052, } freq = exe_Data) myHeap = [[pct, [symbol, ""]] for symbol, pct in freq.items()]

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  • How to install Windows 8 in a system which has Ubuntu 12.04 and Windows 7 installed already?

    - by Vignesh Palani
    I have a system in which I have installed Windows 7 first. I then installed Ubuntu 12.04 to the system. Now, the boot manager is GRUB Loader and everything works fine as Ubuntu detected that Windows 7 has been installed already. Now, I would like to install Windows 8 too. I plan to install using a bootable USB stick(doesn't matter which medium I prefer though. Does it? ). I have done some research and all the materials I can get state that I cannot practically install Windows 8 after Ubuntu and get all the three OSs to run. Can you help? I want all the three Operating systems to work perfectly.

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  • Hyper-v vs Virtualbox

    - by user53864
    I am using Oracle VirtualBox for ubuntu guest virtual servers on windows server 2008 R2. I'm in a plan to migrate(stop using virtualbox) from VirtualBox to Hyper-V. I guess many are using hyper-v virtualization and have good control over it and could help me here in clarifying few things. The reason I use Virtualbox is it's open source and the reason for migrating is that if hyper-v support any additional feature which virtualbox doesn't(and I couldn't migrate VBox vms along with all the snapshots). I have following questions to get it clarified. Does hyper-v require any licence or is limited to running particular number of virtual machines?. Is hyper-v capable to export/import VMs along with all the snapshots? Is it possible to run HeadLess VMs like it's done with VirtualBox? Does hyper-v recognize VDI/VMDK? Anybody can suggest me anything?. Thanks!

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  • Makefile and rm -f file.{ext1,ext2,ext3} issue

    - by ak91
    Hello, Could you explain me, why Makefile rule: clean: rm -f foo.{bar1,bar2,bar3} does not result in removing files: foo.bar1 foo.bar2 and foo.bar3? I believe I saw pattern like that many times in various Makefiles, but I'm currently writing my own Makefile and can't make that rule work correctly (no files are removed). I'm using: gnu make 3.81 gnu bash 4.1.5 Bash evals that pattern as I suspect: $ echo test.{a,b,c} test.a test.b test.c Thanks!

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  • php: save me from dissapointment

    - by Syom
    i'm being dissapointed in programming when some issues can't be placed in my mind. i have file, which starts <?php session_start();?>, and it returns an error Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at C:\xampp2\htdocs\index.php:1) in C:\xampp2\htdocs\index.php on line 3 and now take a look at the moment, i can't anderstand anyway when i copy the all content of my file into another file, it start working. can somebody explain how can it happen. thanks

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  • How do I securely share / allow access to a drive?

    - by sleske
    To simplify backing up a laptop (Windows Vista), I'm planning on sharing its C: drive (with password protection) and using that to back it up from another computer. What are the security implications of this? If I share C: with a reasonable password, how big is the risk of compromise if the system is e.g. inadvertently used on a public WLAN or similar? Background: I'm planning to use [Areca Backup][1] to back up two systems (Windows XP and Vista). My current plan is to install Areca on the XP box, and share the Vista system's C: as a shared folder, so the XP system can read it. Then I can set up the drive as a network drive and have Areca read it like a local drive. Of course, if you can think of a more elegant way of doing this, I'm open to suggestions.

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  • Can somebody suggest good learning source of IMS?

    - by Raja Reddy
    I would like to learn working with IMS, can somebody suggest me a good source? I'm not sure if it matters to say that I have quite good exposure and experience with INSYNC DB2 and QMF. So anything that can depict and explain the advantages and disadvantages over IMS would be really helpful. Thanks for your help beforehand..

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  • hexdump confusion

    - by zedoo
    I am playing with the unix hexdump utility. My input file is UTF-8 encoded, containing a single character ñ, which is C3 B1 in hexadecimal UTF-8. hexdump test.txt 0000000 b1c3 0000002 Huh? This shows B1 C3 - the inverse of what I expected! Can someone explain? For getting the expected output I do: hexdump -C test.txt 00000000 c3 b1 |..| 00000002 I was thinking I understand encoding systems..

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  • What exactly can concrete domains be used to describe?

    - by Exander
    I have read the formal definition of a "concrete domain", but I still don't quite get it. Could someone explain it to me in simpler terms, preferably with some examples? The definition is available in Reasoning in Description Logics with a Concrete Domain in the Framework of Resolution by Ullrich Hustadt, Boris Motik, Ulrike Sattler. Page 1, Definition 1.

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  • Understanding max JVM heap size

    - by Marcus
    I've read the max heap size on 32bit Windows is ~1.5GB which is due to the fact that the JVM requires contiguous memory. Can someone explain the concept of "contiguous memory" and why you only have max 1.5GB on Windows? Secondly, what then is the max heap size on 64 bit Windows and why is this different than what's available on 32 bit?

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  • I created a Python egg; now what?

    - by froadie
    I've finally figured out how to create a Python egg and gotten it to work. What do I do with it now? How do I use it? How do I ensure that everything was correctly included? (Simple steps please... not just redirection to another site. I've googled, but it's confusing me, and I was hoping someone could explain it in a couple of simple bullet points or sentences.)

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  • Windows 8 Metro UI with Multiple Monitors -- Keep in always maximized?

    - by Jersey Dude
    Before installing Win 8 today, my plan was to keep the Metro UI up on my smaller, laptop monitor and have the classic UI running on my two larger monitors. However, in reality, as soon as I click on something in one of the classic UI monitors, the Metro UI minimizes (thus exposing the classic UI in its place). Is there any way to keep the Metro UI from minimizing when I do something in another monitor? Oddly enough, if there is an app running/suspended in the Metro Window, then the Metro UI is not minimized. If the Start screen is currently viewed, clicking in a classic window/monitor switches the Metro UI from the start screen to the last run app. Very peculiar .. Thanks

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  • Add to SortedSet<T> and its complexity

    - by Andrei Taptunov
    MSDN states the following SortedSet(T).Add Method : If Count is less than the capacity of the internal array, this method is an O(1) operation. Could someone please explain "how so"? I mean when adding new value we need to find a correct place to add a value (comparing it with another values) and internal implementation looks like a "Red-Black tree" with O (log N) insertion complexity.

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  • Will I have internet connection issues next day, if I unplug router at night?

    - by headskracher77
    I did this regularly a few years ago and used to feel like I was 'being punished' by the Interent svc provider for disabling access to my computer, because trying to re-connect the next day became a constant pain. I have the same linksys router, a comcast modem, and hi-speed broadband through their LAN. Question: who or what is at fault for lousy internet connections, slow connections, or no connections: (everybody's tech dept. blames everybody else) The router? 10 year olds, maybe obsolete? The modem? came with the service plan - can connect three devices on a sharedconnection. The ISP: I read they not only even control and completely regulate bandwidth usage, but they also ration it!! (true?) So can I safely 'pull the plug' each night for security or not? thnx

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  • Completely replacing (upgrading) a RAID 5 array of disks on an ESXi server

    - by jshin47
    I have a development server that runs several VM on ESXi 5. It has an array of disks in the RAID 5 configuration where all of the disks are currently the same size. I would like to expand storage on this box greatly, but I am not sure what the smartest way to go about this would be. My current plan is to: Turn off all VM Copy VM folders from server to another location Verify that I can mount all the VM on the new location (ie that the copy went ok) Replace all the disks with new, bigger ones Reinstall ESXi5 Copy the VM back over This seems like it might take a while to accomplish and is not terribly slick, especially since I will have to reconfigure ESXi 5, but is there a smarter alternative?

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  • Top stories in RSS reader

    - by Gautam
    How do you know what are the top stories or hot topics just in RSS feed aggregator NewsNow for example?? Could you please explain? I am new to Ruby on Rails. I want to build a RSS reader in Ruby on Rails. Could you suggest me some good tutorials or links?? Thanks Gautam

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  • Vacation scheduler/viewer

    - by Norfeldt
    I'm looking for a solution that allows multiple persons to put plan and notify their vacation by putting it in their electronic calendar and invite a dedicated "robot" email. On the other side I should be able to get a quick overview of the vacation for each person and do a print out that allows me to put it on a board. Example: John puts his winter vacation for week 7 into his calendar and invite [email protected]. Ben does the same thing for week 4 and 5 and invites [email protected]. Dilbert host the [email protected] and prints out and overview for the next 3 months. Each person's vacation is either stated by name or/and color on the print out. I would like to do the thing with standard business software like Outlook 2010 without installing too many softwares. But at the same time it should be easy and quick to make the print outs without too much fiddling Am I dreaming ?

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  • use of system.exit(0)

    - by Warrior
    public class WrapperTest { static { print(10); } static void print(int x) { System.out.println(x); System.exit(0); } } In the above code System.exit(0) is used to stop the program. What argument does that method take? Why do we gave it as 0. Can anyone explain the concept?Thanks.

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  • android inputMethodservice API confusion

    - by yee-chen
    I dont understand quite well about onStartInputView(), onCreateInputView(), onStartInput() and onInitializeInterface(), after i read throught inputMethodservice API. Anyone can explain it when we use function, how we use those function. Are they like life cycle in Activity? if yes, whats the sequence of them. how can they behave?

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  • class foo; in header file

    - by Thomas
    Hi, Is some one able to explain why header files have something like this? class foo; // This here? class bar { bar(); }; Do you need an include statement when using this? Thanks.

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  • Windows Server 2008 R2 Upgrade via Remote Desktop

    - by Marko
    Is it possible to do an in-place upgrade of Windows Server 2008 R2 to Windows Server 2012 using only Remote Desktop? My plan is to extract WS 2012 installation iso file to C:\WS2012 and run the setup. After restart Remote Desktop connection will be lost, but will it be restored later? Is setup going to automatically install everything, restart, run WS 2012 and start listening for RDP connections? Server is rented and I would like to save the KVM fee. I read here that it's possible to upgrade WS 2008 to WS 2008 R2 like that. Thanks!

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  • How to step down voltage from 208V to 110V

    - by Eric Dennis
    I have some racks that will be fed by 208V/20A circuits. These circuits will be conditioned and battery-backed by the facility in which these racks will live. 99% of the devices in the rack will be able to support 208V input, so I plan to use these PDUs. However, there may be one or two odd devices that will need 110V input. I know that I can use a step-down transformer to provide 110V for these devices, but that seems like overkill for such a small number of devices, plus I don't want to pay extra for the UPS functionality since my power will already be battery-backed. Any suggestions for something I can use for these one-off 110V devices?

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  • C# unusual inheritance syntax w/ generics

    - by anon
    I happened upon this in an NHibernate class definition: public class SQLiteConfiguration : PersistenceConfiguration<SQLiteConfiguration> So this class inherits from a base class that is parameterized by... the derived class?   My head just exploded. Can someone explain what this means and how this pattern is useful? (This is NOT an NHibernate-specific question, by the way.)

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