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  • C++: Accessing std::map keys and values

    - by Jay
    How do you access an std::vector of the keys or values of an std::map? Thanks. Edit: I would like to access the actual elements, not just copies of their contents. essentially I want a reference, not a copy. This is essentially what I am wanting to do: std::map<std::string, GLuint> textures_map; // fill map glGenTextures( textures_map.size(), &textures_map.access_values_somehow[0] );

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  • c++ std::map question about iterator order

    - by jbu
    Hi all, I am a C++ newbie trying to use a map so I can get constant time lookups for the find() method. The problem is that when I use an iterator to go over the elements in the map, elements do not appear in the same order that they were placed in the map. Without maintaining another data structure, is there a way to achieve in order iteration while still retaining the constant time lookup ability? Please let me know. Thanks, jbu edit: thanks for letting me know map::find() isn't constant time.

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  • C++ STL map.find() not finding my stuff

    - by Joe
    Hello, I have constructed a map and loaded it with data. If I iterate over all the elements I see they are all valid. However, the find method doesn't find my item. I'm sure it's something stupid I am doing. Here is snippet: // definitions // I am inserting a person class and using the firstname as the key typedef std::map<char*,Person *> mapType; mapType _myMap; mapType::iterator _mapIter; ... Person *pers = new Person(FirstName, LastName, Address, Phone); _myMap.insert(make_pair(pers->firstName, pers); ... ...later.... _mapIter = _myMap.find(firstName); // returns map.end _mapIter = _myMap.find("joe"); // returns map.end and I have no idea why :(

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  • Displaying Map ONLY when the button is clicked in Xcode

    - by Susanth
    Hi, I am developing an iPhone application using XCode and I am kinda stuck with the functionality described in the subject of this post. I want the map(using MapKit) to only load and display after I click a button. So, what code should I have under that my "(IBAction) showMap" function? Whatever I could find online talks about unhiding the map. I want to only load the map when a button is clicked rather than loading the map in the background and simply unhiding it the click of the the button. Thanks ! ~Susanth

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  • iPhone Map issue

    - by Shibin Moideen
    Hi all, I am working on a map application in iPhone. While loading the MapViewController the map is not loaded automatically in the mapView, When we drag the mapView the area outside the intial view is loaded. Also when we double tap on the map it get start loading. Can anybody help me fixing this.? Thanks in Advance, Shibin

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  • Apply css to AREA MAP

    - by PeterCPWong
    I'm created a very large map with many poly areas (over 20 coordinates each) for regions within the map. However, you can't add css to the AREA tag as I was told it's not a visible element. What I want to do is when the user hovers over an area on the map, I want it to be "highlighted" by applying a 1px border to the specific AREA element. Is there a way of doing this? No, I'm not going to resort using rectangles.

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  • Map to String in Java

    - by Dan
    When I do System.out.println(map) in Java, I get a nice output in stdout. How can I obtain this same string representation of a Map in a variable without meddling with standard output? Something like String mapAsString = Collections.toString(map)?

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  • Graphics card recommendation for dual-HD output?

    - by Graham
    I'm going for a dual-HD monitor setup (HDMI or DVI output), running Ubuntu 11.10 64-bit with Unity 3D. What graphics card / video card should I get? Requirements: Dual-monitor output for DVI (mixed-resolution: 1920x1080 and 1920x1200) Or dual-HDMI output, if it works with Ubuntu Smooth desktop compositing and (Chrome) browser and IDE window rendering At least 60fps on fullscreen glxgears (1920x1200 resolution) Supported and non-buggy behaviour in Unity 3D/Compiz Not looking to play games Smooth fullscreen video playback (just because)

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  • Need a PCIe desktop graphics card for dual-monitor

    - by Graham
    I have a mid-2008 workstation with two HD monitors supporting HDMI and DVI inputs. Since Ubuntu 11.10, I have experienced no end of trouble with my NVidia Quadro NVS 290 in TwinView dual-monitor output. Others have similar desktop TwinView woes. I want a new graphics card. Previously I asked for a graphics card recommendation and response was Nvidia Geforce GTS 450... but really I'm looking for someone who has actually got a working dual-monitor desktop to tell me what card they use so I can get something that is known to work. So please, people who have no-issues with their 64-bit Ubuntu 12.04 Unity 3D desktop spread across two HD-resolution external monitors (either DVI or HDMI connector), and who also run Google Chrome (which throws a spanner due to its own GPU compositing)... please let me know what graphics card you have so I can buy one. Gathering Options These seem to be the Nvidia cards featuring dual DVI. But they all seem to be gaming cards - what has dual-DVI, good support, but is not a massive gaming card? Nvidia GTS 450 (previously recommended) - 2x DVI Nvidia GTX 550 Ti (used by System76) - 2x DVI Nvidia GT 430 (used by System76) - 1xDVI, 1xHDMI Nvidia GT 640 (found on NVidia site) - 1xDVI, 1xHDMI (also GT 620, GT 630) Has anyone had a good desktop dual-monitor Unity 3D experience with ATI cards?

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  • Problem in VS2010 IDE in analog monitor in a dual-monitor setup

    - by Samik R.
    I am using VS2010 Premium with a dual-window setup. One of the monitors is on a digital (DVI) cable and other one is on an analog (VGA) cable. I have noticed that when I put VS2010 in the analog monitor, there are garbled texts and refresh problems while coding and/or scrolling. This does not seem to be the case when I put VS2010 in the digital monitor. Note that, I am not expanding VS IDE to use 2 screens, just making it 1 full screen, either analog or digital. Has anyone else experienced this problem? I also work with VS2008 and have not seen this problem in either screen. VS IDE has started using WPF from the 2010 release, not sure if this has something to do with it.

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  • How to setup whole-disk encryption with dual boot on a MacBook Pro (generation 9,2 with 12.04)

    - by blueyed
    I can install Ubuntu 12.04 on the MacBook when using the "noapic" kernel boot option, using the alternate amd64+mac image (from http://cdimage.ubuntu.com/releases/12.04/release/ ). But after installation the screen turn sblack after trying to boot "Windows" (as named in the boot menu that shows up when holding Option/Alt during startup). I want to use whole-disk encryption and given that only one free partition is available, I have setup LVM to do so: - vg0 contains bootlv and cryptlv - in cryptlv I have setup encryption with another LVM volume group (vg1, which holds swaplv, rootlv and homelv) I have not installed Grub during installation (because I was not sure about the partition) and when trying to install it later on /dev/sda4 (which contains the outer LVM) it complained that it could not determine the file system, and --force did not help either. The black screen / behavior looks similar to starting the installer without enabling the noapic option.

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  • How do I remove my Windows 7 setup from a Windows/Ubuntu dual-boot?

    - by Tom
    Previously my OS was Window 7 and some day it began to show problems with booting and finally it didn't boot at all. I tried to repair it but it didn't get repaired. Then I installed Ubuntu 14.04 LTS alongside Windows and am impressed much by Ubuntu. So I want to remove all my Windows files. I searched Google to know how to do it and I found OS-Uninstaller. I have some doubts before proceeding with OS-Uninstaller - I need to keep my photos, songs, movies and personal files in my system even if Windows is removed. Normally Windows files are installed in the C Drive. My personal files are not in the C Drive. So will removing Windows files affect my personal files ? Did the OS-Uninstaller affect Ubuntu anyway ? Please note that I want to remove only the Windows installation files(the files added to my system by Windows during its installation). I don't want to change the NTFS partition to any other format since there is a probability that I will install newer version of Windows later.

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  • Dual Booting Windows 7 and Ubuntu 12.04. Partition Sizes?

    - by John F.
    I'm about to reinstall Windows, so I thought that I'd try Ubuntu out on a partition just for fun. My question is, how large should my partitions be for each of them? I know this various depending on what you use, so i'll give you a general idea of what I have, and what I have in mind. I'm currently running: Windows 7 Professional (64bit) RAM: 4GB CPU: 2.5Ghz Quad Core processor HDD: 500GB GPU: 1GB Nvidia GeForce I have around 130GB in Steam games, and some heavier applications like Photoshop CS6, Sony Vegas Pro 11. But other Applications I use are: Chrome Skype Dxtory Fraps OpenOffice BitTorrent and other assorted smaller programs. So, I was thinking that I would give my Windows partition about 150-200GB, my Ubuntu Partition around 20GB, and the rest to shared storage. I'm not really sure if I'd need more or less on Ubuntu, because I've never used it and I'm not really sure what kind of apps i'd be using over there. This would also be a clean install, so I'd be wiping my HDD, creating the Partitions in GParted, then installing Windows with Ubuntu following that. Any critique you could give me? Maybe explanations to what the /root, /boot and /home partitions I hear are about? Thanks in advanced if you actually read this lengthy thing! Any help is appreciated. (x

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  • Is it Possible to Repair Boot Record on Windows Vista Partition on Dual Boot Ubuntu 12.04.02 LTS Install?

    - by PasBonRJB
    I recently successfully installed Ubuntu 12.04.02 Desktop as a "side-by-side" on an eMachines ET1641-02w PC; which before had Windows Vista; but was no longer bootable, because the boot sector somehow got trashed. After I installed Ubuntu I can go to Devices/OS and I can access all of my docs, pics, videos, music, etc. on the Windows Vista partition; but I still can't "boot" the Windows partition. I've seen several posts regarding recovering boot sectors using the Boot-repair app; but am wondering if this "boot-repair" is only for the Ubuntu partition. Can I use "boot-repair" to repair the Windows Vista boot sector?

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  • WIN7 and Ubuntu lost after Installing ubuntu 12.04 and win7 dual system ,I have no OS on my laptop now

    - by abos
    Here is the procedure: In the morning I installed ubuntu using a USB directly without config any thing to my win7 system. After install complete, ubuntu installation software tell me to reboot.And everything is just find. While rebooting, there is NO UBUNTU system for me to select,and my laptop go straight to log in using WIN7. NO ubuntu shows on WIN7's configuration(Default System). Log in ubuntu using usb(try ubuntu without installation), I can find ubuntu's filesystem was already there. Formatting the disk on WIN7's disk management, rearranging them to other disk.Still having no trouble with WIN7. In the afternoon try a few times of installation and uninstallation of ubuntu. still shows no sign of selecting ubuntu system. In the evening another trial while installing ubuntu with the third option of: installing ubuntu alongside with INW7, erase win7 and install ubuntu. somethingelse --- my check failed with configuartion for what comes out with the 'something else' option,reboot. And I have no system now with some cmd tips say: Reboot and Select proper Boot Device or Insert Boot Media in selected Boot device and press a key. Files those on win7's orginal file system and Ubuntu filesystem can still be found when I 'try ubuntu without installation'. 5.But I just got no OS when I reboot my laptop normally.

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  • Dual boot UEFI Windows 7 and Ubuntu 12.04 (both 64 bits). W7 entry doesn't appear in GRUB

    - by Joe
    After trying to install both OS during 2 days, I'm confused and getting mad... I have SSD 128 GB and HDD 500 GB both empty. My laptop is Asus K55VM. BIOS support UEFI. What I have done: Install new SSD (Samsung 830 128GB) Use GParted on liveCD to create new table of partitions (GPT) and create 3 partitions (in the SSD) for different purposes: Partition 1: 80 GB (w7); Partition 2: 30 GB (Ubuntu 12.04 -Just / -); Partition 3: 10 GB unused (for future extesion of the other partitions) Install Windows 7 (with UEFI) in Partition 1. This create: /dev/sda1 - 100 MB for System (UEFI boot I guess) - FAT32 /dev/sda2 - 100 MB aprox. for MSR /dev/sda3 - 79.800 MB aprox. for Windows7 data In this point everything works fine. I have W7. Now I install Ubuntu 12.04 amd64 (with UEFI) as follows: Install / in Partition 2 - /dev/sda4 30 GB ext4, and in the hdd I install /home and swap. I select bootloader in /dev/sda1 (where it's supposed to be the UEFI boot). I install updates and reboot. Problem: Now just appears grub menu with Ubuntu entries and not Windows 7. Alternative solution found: When I turn on laptop, before loading GRUB I press ESC key and appear BIOS boot, so I can select to boot the Windows partition, Ubuntu partition, DVD, USB, etc... but I think is not the best way to boot different OS. I've tried: sudo update-grub2 with no success. What can I do??

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  • How to remove Ubuntu from dual boot system with Windows 7?

    - by user71307
    I wish to remove Ubuntu and I'm not quite sure how. I know it has something to do with partitions. I have 3 partitions. 1. OS [683 GB] 2. Recovery [14 GB] 3. Ubuntu 12.04 LTS (E:) I know it says Ubuntu but when I installed Ubuntu I think I put 14 gigabytes for it so I think its the recovery one but I'm not sure. I could have sworn I put more than 700 megabytes for it. I have googled this and I can't seem to find an answer. Any help would be nice.

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  • Dual boot :Windows 7 partition deleted after Kubuntu 14.04 install...Weird!

    - by user292152
    I've bought two new SSD's in order to install Kubuntu on one and Win 7 on the other one. Before I had Linux Mint and Win7 together one just one SSD. So first I installed win7 as recommended, and then used the guided installer of Kubuntu to install Kubuntu. I selected the second SSD, chose the option "use entire disk and install", but to my surprise after rebooting and selecting win7 boot loader from grub2, I got a prompt that my windows installation is damaged, and I need to run the repair option from the installation disk. So I booted into Kubuntu again, fired up kparted and saw that indeed my windows partition got deleted, except the recovery partition. I don't understand what happened. I am not new to this topic, and this was not my first time installing Ubuntu alongside windows. I have never ever had that problem. What can I do to make sure this won't happen again, so I won't waste another 2 hours of my life? ?? Thanks a lot !

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  • Failed Vista/Ubuntu 12.04 attempt at dual boot. Can only boot Ubuntu now

    - by mathematician1975
    I recently tried installing Ubuntu 12.04 alongside my Windows Vista install. I can boot fine into Ubuntu every time, but now every time I choose to boot into Windows, the process fails completely and restarts (or shuts down) my laptop. Is there anything I can do to recover this. I am very happy with Ubuntu and I do not want to recover my old Vista installation to overwrite it, but I do need to be able to use both OS's. Is it recoverable or should I start from scratch?

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  • How to Dual Boot Windows 7 and Ubuntu 12.10?

    - by user108329
    So firstly I tried to install Ubuntu, from the website to run alongside Windows. Went through Wubi etc. Asked me if I wanted to try or Install, I selected install. I selected option to run alongside Windows 7 but when it was partitioning it failed and I only had the fresh install as an option as probably Windows became corrupt then? So I installed Windows again, ran Ubuntu from the livecd, went into gpartition, didn't really know what I was doing but anyhow, resized a partition which was 698gb, one was 100mb, I guessed CD drive. Gparted said it was gonna take three hours, so I took that for meaning Windows was corrupt again. Your help is greatly appreciated. Thanks

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  • How to avoid problems when installing Ubuntu and Windows 7 in dual-boot?

    - by BlaXpirit
    I want to try out Ubuntu (and hopefully choose it as my primary OS). After looking at many versions of it in VirtualBox and from Live CD, I've finally decided to install it. So I defragmented and shrinked one of the partitions to make room for Ubuntu. My current setup (after shrinking the D: partition): [·100 MB·] [······250000 MB······] [·······600000 MB·······] [··100000 MB···] Reserved Windows 7 system (C:) Data (D:) Free space NTFS NTFS NTFS (for Ubuntu) The Internet (including AskUbuntu) is full of scary stories about Windows not loading after installation of Ubuntu, something about installing GRUB to a wrong partition, etc. As I am a newbie to Linux and Ubuntu, it is very easy for me to do something wrong. Please mention the problems that may appear and explain how to avoid them. Ubuntu version that will be installed: 10.10 Desktop amd64 Please note that I have installed Windows 7 about a year ago, so I have much to lose if something goes wrong. I want to be very careful because there is no way for me to backup all the data.

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  • Show WindowsForm in the center of the Screen (Dual Screen)

    - by serhio
    I have Dual Monitors and want displaying a windows form in the center of the screen. (I have a variable MonitorId=0 or 1). I have: System.Windows.Forms.Screen[] allScreens=System.Windows.Forms.Screen.AllScreens; System.Windows.Forms.Screen myScreen = allScreens[0]; int screenId = RegistryManager.ScreenId; // DualScreen management if (screenId > 0) { // Possede 2-ieme ecran if (allScreens.Length == 2) { if (screenId == 1) myScreen = allScreens[0]; else myScreen = allScreens[1]; } } this.Location = new System.Drawing.Point(myScreen.Bounds.Left, 0); this.StartPosition = FormStartPosition.CenterScreen;

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