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  • Where to put code documentation?

    - by Patrick
    I am currently using two systems to write code documentation (am using C++): Documentation about methods and class members are added next to the code, using the Doxygen format. On a server Doxygen is run on the sources so the output can be seen in a web browser Overview pages (describing a set of classes, the structure of the application, example code, ...) is added to a Wiki I personally think that this approach is easy because the documentation about members and classes is really close to the code, while the overview pages are really easy to edit in the Wiki (and it's also easy to add images, tables, ...). A web browser allows you to see both documentations. My co-worker now suggests to put everything in Doxygen, because we can then create one big help file with everything in it (using either Microsoft's HTML WorkShop or Qt Assistant). My concern is that editing Doxygen-style documentation is much harder (compared to Wiki), especially when you want to add tables, images, ... (or is there a 'preview' tool for Doxygen that doesn't require you to generate the code before you can see the result?) What do big open-source (or closed source) projects use to write their code documentation? Do they also split this up between Doxygen-style and a Wiki? Or do they use another system? What is the most appropriate way to expose the documentation? Via a Web server/browser, or via a big (several 100MB) help file? Which approach do you take when writing code documentation?

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  • Rendering Text with the HTML5 Canvas

    - by dwahlin
    In a previous post I walked through the fundamentals of rendering shapes such as squares and circles using the HTML5 Canvas API. In this post I’ll provide a simple example of rendering and rotating text. To render text you can use the fillText() or strokeText() functions which take the text to render as well as the x and y coordinates of where to render it. To rotate text you can use the transform functions available with the HTML5 Canvas such as save(), rotate(), and restore(). To run the live demos that follow click the Result tab in the blue bar of each demo.   Rendering Text This example provides a simple look at how text can be rendered using the HTML5 Canvas. It iterates through a loop, updates the text and font size dynamically, measures the width of the text using the measureText() function, and then calls fillText() to render the text with the desired font size to the screen.   Here’s what the code above renders:   Rotating Text This example shows how text can be rendered and even rotated by using transform functions built into the HTML5 Canvas. The code starts by rendering text the standard way using fillText(). It then saves the state of the canvas performs an x,y coordinate transform (moves to 100, 300 respectively) and then rotates the canvas –90 degrees using the rotate() function. After the text is rendered, the canvas is reverted back to it’s existing state (saved by calling the save() function) by calling the restore() function. An additional line of text is then rendered.   Here’s what the code above renders:   If you’re interested in learning more about the HTML5 Canvas and how it can be used in your Web or Windows 8 applications, check out my HTML5 Canvas Fundamentals course from Pluralsight.

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  • Iptables massive 1:1 NAT

    - by TiFFolk
    I have to connect two LANs: LAN1: 10.10.0.0/16 and LAN2: 192.168.0.0/16. I can't do simple routing, because 192.168.0.0/16 net is prohibited in LAN1, so I am thinking of using Full cone nat (1:1) to translate 192.168.x.y/16 to 10.11.x.y/16. Each translation is done by this rules: iptables -t nat -A PREROUTING -d 10.11.0.0/16 -j DNAT --to-destination 192.168.0.0/16 iptables -t nat -A POSTROUTING -s 192.168.0.0/16 -j SNAT --to-source 10.11.0.0/16 But I will have to enter 254*254*2 rules, what will, I think, result in enormous performance degradation. So, is there a way to write such one-to-one translation with minimum number of rules?

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  • Ubuntu 12.04.2 Dual boot UEFI Windows 8 Preinstalled CX21903W Ultrabook

    - by user180782
    Hi i have a problem trying to install ubuntu. The machine is a CX Ultrabook model CX.21903W Intel I5 with 500GB hard disk, 8 GB ram and 32 GB SSD. From Installing Ubuntu on a Pre-Installed Windows 8 (64-bit) System (UEFI Supported), and according to the steps guide: 1 - We create a partition from Win8 (70 GB) from the own win8 program. 2 - Confirm-SecureBootUEFI=True. 3 - From Win8, shift + Restart and from special menu we selected the UEFI Firmware Setting. 4 - From BIOS Option: ------Option 1) Disable Secure Boot. ------Option 2) Disable UEFI (Not Available) from Option 1: Three ways is available. With Secure Boot enable - We can't even boot ubuntu. A red windows saying Soft unproper signed. With Secure Boot disable - and this config in boot device order: ----1: UEFI: USB ----2: Windows Boot Manger ----3: Others and CSM (Compatibility Support Module): enable - GRUB appears and selecting try Ubuntu then a black windows appears and nothing happens. The same result if install ubuntu is selected. With Secure Boot disable - and this config in boot device order: ----1: USB (No UEFI) ----2: Windows Boot Manger ----3: Others and CSM (Compatibility Support Module): enable - GRUB appears and selecting try Ubuntu, - Ubuntu boots and we can install it even. 5 - Rebooting and just changing the boot order as ----1: Ubuntu [] ----2: Windows Boot Manger ----3: Others then nothings happens. 6 - Booting from LiveUSB again and, as per instructed, making Boot-Repair (A warning windows: Ubuntu is working in legacy mode.). 7 - Saving changes and rebooting, Grub works but selecting Ubuntu, a black windows appears and nothing happens. Selecting Win8, Win8 boots and works. Untill now we can't make the ubuntu installation. Any suggestion will be welcomed. kind regards and thanks in advance.

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  • How to implement fast search on Azure Blob?

    - by Vicky
    I am done with writing the code to upload files (text files) to azure blob storage. Now I want to provide search based on text files content. For ex. If I search for "Hello" then the name of files that contains "Hello" words should appear in search result. Here my code to search class BlobSearch { static void Main(string[] args) { string searchText = "Hello"; CloudStorageAccount account = CloudStorageAccount.Parse(azureConString); CloudBlobClient blobClient = account.CreateCloudBlobClient(); CloudBlobContainer blobContainer = blobClient.GetContainerReference("MyBlobContainer"); blobContainer.FetchAttributes(); var blobItemList = blobContainer.ListBlobs(); foreach (var item in blobItemList) { string line = string.Empty; CloudBlockBlob blockBlob = blobContainer.GetBlockBlobReference(item.Uri.ToString()); if(blockBlob.Name.Contains(".txt")) { int lineno = 1; using (var stream = blockBlob.OpenRead()) { using (StreamReader reader = new StreamReader(stream)) { while ((line = reader.ReadLine()) != null) { if (line.IndexOf(searchText) != -1) { Console.WriteLine("Line : " + lineno +" => "+ blockBlob.Name); } lineno++; } } } } } Console.WriteLine("SEARCH COMPLETE"); Console.ReadLine(); } } Above code is working but it is too slow. Is there any way to do it faster or Can improve above code.

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  • Why does my system use so much cache?

    - by Dave M G
    Previously, on my desktop computer running Ubuntu 14.04, I had 4GB RAM, which I thought should be plenty. However, after being on for a while, my computer would seem to get slow. I have a system resource monitor app in my Gnome panel, which I assume represents the available RAM (?). It shows a dark green area as being "Memory", and a light green area as "Cache". The "Cache" would slowly grow until it filled the whole graph, and then programs would get slow to load, or it would take a while to switch programs. I could alleviate the problem somewhat with this command, but eventually the computer cache fills up again, so it's only a bandaid: sudo sh -c "sync; echo 3 > /proc/sys/vm/drop_caches" So, I figured I'd get more RAM, so I replaced one 2GB stick with an 8GB stick, and now I have 10 GB ram. And my "cache" still slowly maxes out and my computer slows as a result. Also, sometimes the computer starts out with "cache" maxed when I first boot and log in. Not always though, I don't know if there's a pattern that determines why it happens. Why is Ubuntu using up so much cache? Is 10GB not enough for Ubuntu? Here's what my system monitor looks like in my Gnome panel. The middle square shows RAM usage. The light green area is the "cache": This is my memory and swap history, which doesn't seem to include any information about "cache". I realize at this point I'm not totally clear on the difference between "cache" and "swap":

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  • How do I get my server to recognise a change in users?

    - by Gareth
    I'm new in post running a small charity. As a result I've inherited a system from the previous manager that was poorly run. In my enthusiasm to change login details etc. I appear to have killed my microsoft outlook account. When trying to access outlook it prompts me for my user name, domain name and password - which I'm obviously not filling in correctly because it's not accepting my answers. Is there a way to determine that information from the server side? I have access to the server and the staff computers.

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  • Why is my Wacom Intuos tablet not detected?

    - by mjwittering
    I need a little help trying to install a Wacom Intuos tablet, model number CTL-480/S. My installation of Ubuntu 13.04, 64bit, doesn't seem to be able to detect the device. I've tried an few different USB ports on my machine and get the same result. I believe there is an issue because when I open the System Settings app from the launcher and browse to the Wacom Tablet section under hardware, it reports that there is 'No table detected'. When I use lsusb I can see the device is detected: Bus 003 Device 004: ID 056a:030e Wacom Co., Ltd I've also pulled the following from the syslog: Oct 16 16:51:05 earth kernel: [ 7062.388031] usb 3-5: new full-speed USB device number 4 using ohci_hcd Oct 16 16:51:05 earth kernel: [ 7062.611038] usb 3-5: New USB device found, idVendor=056a, idProduct=030e Oct 16 16:51:05 earth kernel: [ 7062.611042] usb 3-5: New USB device strings: Mfr=1, Product=2, SerialNumber=0 Oct 16 16:51:05 earth kernel: [ 7062.611045] usb 3-5: Product: Intuos PS Oct 16 16:51:05 earth kernel: [ 7062.611047] usb 3-5: Manufacturer: Wacom Co.,Ltd. Oct 16 16:51:05 earth mtp-probe: checking bus 3, device 4: "/sys/devices/pci0000:00/0000:00:02.0/usb3/3-5" Oct 16 16:51:05 earth mtp-probe: bus: 3, device: 4 was not an MTP device I'd really appreciate any suggestions to help debug and install this device.

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  • What could explain my partitions disappearing on a new SSD with Windows 7?

    - by charlesrandall
    So this morning, I had a fresh install of Windows 7 pro, on a new SSD (Patriot TorqX 128gb), which I just put in to a new Dell Studio XPS 9000. Everything was fine. I booted to windows, no problem. I go to work. 8 hours later, I come home, and I'm greeted by my boot screen complaining about no bootable devices. Windows repair from the Windows 7 pro disk says it can't fix the problem. It doesn't see any windows installs. I boot up GParted, and my SSD is completely unallocated. No space used, no partitions. Perhaps this is related to allowing windows 7 to create a utility partition when I installed? Only thing I can think of. Is there some kind of known hardware issue that can result in an SSD completely wiping itself?

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  • Amazon EC2 instances changes server time/date on reboots and other time weirdness

    - by puffpio
    I have a windows instance up in EC2. I manually set the timezone to Pacific. 1) For some reason using window's built in time sync doesn't work in the instance...but whatever. I turn off automatic time syncing... but 2) On reboot the time on the server changes! For example, if i reboot it at 4PM on Wednesday, when the server comes back up it will read 12 noon on Thursday! As a result any access to Amazon's other services like SImpleDB fail because the timestamps generated are too far off the current time. Has anyone seen this or figured this out?

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  • Installing packages in R path[1]="\file/users/bernard/R/win-library/2.15": Access is denied

    - by user1812210
    I recently attended an R training course and was happily working with a laptop in RStudio. On my return to the office I installed RStudio and I tried to run some scripts I had gathered from the course. However, these scripts required me to install packages and when I tried to install the packages the result was an error. Error in install.packages : path[1]="\file/users/bernard/R/win-library/2.15": Access is denied In my firm we write to a server drive refferred to as the U: drive rather than the hard disk on the desktop for security reasons. Any ideas what is going on? I have checked the properties of the folder in windows and it says I have permission but still it fails. I have tried creating a folder on the C drive and directing R_LIBS_USER to it but no luck.

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  • SQL query duplicating results [on hold]

    - by Ben
    I have written a query that results in data being retrieved for the top 5 customers in my table per account manager. Here is the query: SELECT account_manager_id, mgap_ska_id, total FROM (SELECT account_manager_id, mgap_ska_id, mgap_growth + mgap_recovery AS total, @grp_rank := IF(@current_accmanid = account_manager_id, @grp_rank + 1, 1) AS grp_rank, @current_accmanid := account_manager_id FROM mgap_orders ORDER BY total DESC ) ranked WHERE grp_rank <= 5 and here is the result of the query: account_manager_id mgap_ska_id total 159840 5062352 61569.21 159840 5062352 61569.21 159840 5062352 61569.21 159840 5062352 61569.21 159840 5062352 61569.21 160023 5024546 52244.29 160023 5024546 52244.29 160023 5024546 52244.29 160023 5024546 52244.29 160023 5024546 52244.29 159669 5323292 50126.38 159669 5323292 50126.38 159669 5323292 50126.38 159669 5323292 50126.38 159669 5323292 50126.38 As you can see the query is partially working as needed, except Im getting duplicates for mgap_ska_id whereas it should be five individual mgap_ska_id numbers. and here is a sample of my data: mgap_ska_id account_manager_id mgap_growth mgap_recovery 5057810 64154 0 1160.78 5178114 24456 0 5773.42 5292421 160338 0 5146.04 5414091 24408 0 104.14 5057810 64154 0 1160.78 Can anyone see where Ive gone wrong in my query and how/where I might correct the error so I get the 5 top individual customers (mgap_ska_id) instead of the duplicated top single customer?

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  • Multicasting and multicast address

    - by Zia ur Rahman
    I have confusion about the multicast addresses, I have read an example which is given by. Suppose two applications have been built to send audio over a network. One application accepts and digitizes an audio input stream, and then sends the resulting frame across the network to other application. The second application receives the digitized audio from the network, converts it back to the audio signal and plays the result over a speaker. Unless the two applications use broadcast to send frames, no other computers on the network will receive a copy of the frame. Multicasting provides an excellent solution to the problems of allowing some computers to participate in audio transmission. To use multicasting , a multicast address must be chosen for the audio application. And the receiving application passes the multicast address to the network interface. The interface begins to accept the packets sent to that address. Question: how this multicast address is chosen, how the receiving application knows that the sender using this specific destination address for the audio frames.

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  • Outlook Search starting date

    - by Khalid Rahaman
    I am having a problem with Outlook 2003 search on 2 desktops - 1 XP, 1 Windows 7. They are both connected to the same exchange 2007 server. There are several other users connected to the same server, inside the lan and outside using RPC none of whom are having this issue. When the user searches Outlook, search starts from the date Outlook OST file was created and then searches more recent items. The result is that if user is searching for some phrase, e.g. "Blade" in their inbox folder, search results from months ago are returned first then the more recent results. If i delete the OST file and restart Outlook it rebuilds a new one, and resynchronizes normally, then search works normally again, however approximately 6 weeks later the problem will start again (see second paragraph). Anyone experience this ? Any Suggestions ?

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  • PCI scan findings and problems with week ciphers on ports 993,443,995,465

    - by user64991
    From PCI scan results: Synops is : The remote service encrypts traffic using a protocol with known weaknesses . Description : The remote service accepts connections encrypted using SSL 2.0, which reportedly suffers from several cryptographic flaws and has been deprecated for several years. An attacker may be able to exploit these issues to conduct man-in-the-middle attacks or decrypt communications between the affected service and clients . See also : http://www.schneier.com/paper-ssl.pdf Solution: Consult the application's documentation to disable SSL 2.0 and use SSL 3.0 or TLS 1.0 instead. Risk Factor: Medium / CVSS Base Score : 2 (AV:R/AC:L/Au:NR/C:P/A:N/I:N/B:N) I have tried to change SSLProtocol all -SSLv2 to SSLProtocol -ALL +SSLv3 +TLSv1 And SSLCipherSuite ALL:!ADH:!EXPORT:!SSLv2:RC4+RSA:+HIGH:+MEDIUM:+LOW To SSLCipherSuite ALL:!ADH:RC4+RSA:+HIGH:!MEDIUM:!LOW:!SSLv2:!EXPORT But using SSLdigger, it shows the same result. Is this the right way to do something like this?

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  • External HDD is always in use when trying to safely remove

    - by Mario De Schaepmeester
    I have a WD 1TB Elements external hard drive and every time I use the Windows 7 "safely remove" feature, it gives me a dialog telling that a process is using the disk. Using Sysinternals Process Explorer and the answer on this question (find everything with the drive letter) I get the following result: What is the $Extend folder and why is it in use? How can I disable it? I cannot remove it using the command line (access denied). Edit: I've followed the instructions over here and under the registry key HKLM\SYSTEM\CurrentControlSet\Control\BackupRestore\FilesNotToBackup I have a Multi-String Value named IgnoreNTFS with data \$Extend* /s But this does not make any difference. Also this question is not about a server. Additionally I can tell that I use a program called mkv2vob to convert video files with a Matroska container into something my PS3 will play. I convert the source files straight from my external HDD, but I would expect if this program does not release the lock on the HDD, surely it cannot be locked if the process isn't even running?

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  • How do I restore a backup of my keyring (containing ssh key passprases, nautilus remote filesystem passwords and wifi passwords)?

    - by con-f-use
    I changed the disk on my laptop and installed Ubuntu on the new disk. Old disk had 12.04 upgraded to 12.10 on it. Now I want to copy my old keyring with WiFi passwords, ftp passwords for nautilus and ssh key passphrases. I have the whole data from the old disk available (is now a USB disk and I did not delete the old data yet or do anything with it - I could still put it in the laptop and boot from it like nothing happend). The old methods of just copying ~/.gconf/... and ~/.gnome2/keyrings won't work. Did I miss something? 1. Edit: I figure one needs to copy files not located in the users home directory as well. I copied the whole old /home/confus (which is my home directory) to the fresh install to no effect. That whole copy is now reverted to the fresh install's home directory, so my /home/confus is as it was the after fresh install. 2. Edit: The folder /etc/NetworkManager/system-connections seems to be the place for WiFi passwords. Could be that /usr/share/keyrings is important as well for ssh keys - that's the only sensible thing that a search came up with: find /usr/ -name "*keyring* 3. Edit: Still no ssh and ftp passwords from the keyring. What I did: Convert old hard drive to usb drive Put new drive in the laptop and installed fresh version of 12.10 there Booted from old hdd via USB and copied its /etc/NetwrokManager/system-connections, ~/.gconf/ and ~/.gnome2/keyrings, ~/.ssh over to the new disk. Confirmed that all keys on the old install work Booted from new disk Result: No passphrase for ssh keys, no ftp passwords in keyring. At least the WiFi passwords are migrated.

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  • Apache only transferring partial content from a Samba share

    - by thaBadDawg
    I have an Apache server running on CentOS 5.3. It currently hosts 12 sites with no known issues. (I say this to point out that up to this point my Apache installation has performed flawlessly) I'm adding a new site where the DocumentRoot of the new VirtualHost is a Samba share. When at the command line of the server I can cp video.m4v ~ and the whole file is copied properly to my home directory. But when I try to access the file from IE/Firefox/Safari/Chrome it only passes back a partial result of 33k. The same thing is happening with my image and audio files. If I make the files local to the server by copying them from the share and then serving them up then the files transfer. Any ideas?

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  • Port Forwarding: Why do my local sites on 80 work but not those on 8080?

    - by Chadworthington
    I setup my router to forward port 80 to the PC hosting my web site. As a result, I am able to access this url (Don't bother clicking on it, it's just an example): http://my.url.com/ When i click on this link, it works: http://localhost:8080/tfs/web/ I also forward port 8080 to the same web server box But when I try to access this url I get the eror "Page Cannot be displayed:" http://my.url.com:8080/tfs/web/ I fwded port 8080 the same way I fwded port 80. I also turned off Windows Firewall, in case it was blocking port 8080. Any theories why port 80 works but 8080 does not?

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  • dependency hell

    - by Delirium tremens
    I'm trying to install empathy. Current version has to be installed from source, but needs a list of things that have to be installed one by one. Previous version is in repository, but blinks (opens, then right after that, closes). Previous version of the previous version: apt-cache search -showpkg empathy shows general empathy information and a telepathy too, but not the rpm file name taking the rpm file name from a Google search result, apt-get install package=empathy-2.30.1-2pclos2010 says package package (twice, really) not found installing apturl, clicking the rpm file link, opening it with apturl, installation gui starts, but fails opening the rpm file with Synaptic doesn't work opening the rpm file with /usr/bin/apt-get doesn't work What now?

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  • Resetup kernel for virtualbox and now ubuntu is in initramfs state

    - by UbuntuMan
    My 10.04LTS became Read-Only so I wanted to reboot this virtual machine. Then I couldn't get it back up running. VirtualBox threw Result Code: NS_ERROR_FAILURE (0x80004005) error. I did the kernel re-setup: sudo /etc/init.d/vboxdrv setup * Stopping VirtualBox kernel modules [ OK ] * Uninstalling old VirtualBox DKMS kernel modules [ OK ] * Trying to register the VirtualBox kernel modules using DKMS [ OK ] * Starting VirtualBox kernel modules [ OK ] I can't even use sudo in this state. What can I do? (initframfs) /dev/sda1 /bin/sh: /dev/sda1: Permission denied (initframfs) /dev/sda2 /bin/sh: /dev/sda3: Permission denied (initframfs) /dev/sda3 /bin/sh: /dev/sda1: not found I have a similar image so I can check the disks setting if needed. Please help me. Thanks. I have an older version of VirtualBox: 4.0.8 something like that. But other vms on the same VirtualBox are working fine. UPDATE I can hold down SHIFT key and see the GURU menu. Only one kernel exists. Ubuntu(...) Ubuntu(recovery) master test master test

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  • XNA - Finding boundaries in isometric tilemap

    - by Yheeky
    I have an issue with my 2D isometric engine. I'm using my own 2D camera class which works with matrices and need to find the tilemaps boundaries so the user always sees the map. Currently my map size is 100x100 (with 128x128 tiles) so the calculation (e.g. for the right boundary) is: var maxX = (TileMap.MapWidth + 1) * (TileMap.TileWidth / 2) - ViewSize.X; var maxX = (100 + 1) * (128 / 2) - 1360; // = 5104 pixels. This works fine while having scale factor of 1.0f but not for any other zoom factor. When I zoom out to 0.9f the right border should be at approx. 4954. I´m using the following code for transformation but I always get a wrong value: var maxXVector = new Vector2(maxX, 0); var maxXTransformed = Vector2.Transform(maxXVector, tempTransform).X; The result is 4593. Does anyone of you have an idea what I´m during wrong? Thanks for your help! Yheeky

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  • Tinkerforge Rotation/LCD & JavaFX Plans

    - by Geertjan
    The first time I integrated two Tinkerforge bricklets, the day before yesterday, was pretty cool: import com.tinkerforge.BrickMaster; import com.tinkerforge.BrickletLCD20x4; import com.tinkerforge.BrickletRotaryPoti; import com.tinkerforge.IPConnection; import java.util.Calendar; public class TFConnectionDemo { private static final String HOST = "localhost"; private static final int PORT = 4223; private static final String MASTERBRICKUID = "somethingabc"; private static final String LCDUID = "somethingabc"; private static final String ROTIUID = "somethingabc"; private static IPConnection ipc; private static BrickMaster master = new BrickMaster(MASTERBRICKUID); private static BrickletLCD20x4 lcd = new BrickletLCD20x4(LCDUID); private static BrickletRotaryPoti poti = new BrickletRotaryPoti(ROTIUID); public static void main(String[] args) { try { ipc = new IPConnection(HOST, PORT); ipc.addDevice(master); ipc.addDevice(lcd); ipc.addDevice(poti); poti.setPositionCallbackPeriod(50); poti.addListener(new BrickletRotaryPoti.PositionListener() { @Override public void position(short position) { lcd.clearDisplay(); Calendar cal = Calendar.getInstance(); lcd.writeLine((short) 0, (short) 0, cal.getTime().toString()); lcd.writeLine((short) 1, (short) 0, "Rotation: " + position); } }); } catch (Exception e) { } } } The result is that the display text in the LCD bricklet changes while I turn the rotation bricklet: Now imagine that you have some JavaFX charts and, while you turn the rotation bricklet (i.e., the dial thing that I'm turning above), the values of the charts change. That would be pretty cool because you'd be able to animate the JavaFX charts by rotating an object externally, i.e., without even touching the keyboard. That would be pretty cool to see and shouldn't be hard to implement.

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  • Why isn't Java used for modern web application development?

    - by Cliff
    As a professional Java programmer, I've been trying to understand - why the hate toward Java for modern web applications? I've noticed a trend that out of modern day web startups, a relatively small percentage of them appears to be using Java (compared to Java's overall popularity). When I've asked a few about this, I've typically received a response like, "I hate Java with a passion." But no one really seems to be able to give a definitive answer. I've also heard this same web startup community refer negatively to Java developers - more or less implying that they are slow, not creative, old. As a result, I've spent time working to pick up Ruby/Rails, basically to find out what I'm missing. But I can't help thinking to myself, "I could do this much faster if I were using Java," primarily due to my relative experience levels. But also because I haven't seen anything critical "missing" from Java, preventing me from building the same application. Which brings me to my question(s): Why is Java not being used in modern web applications? Is it a weakness of the language? Is it an unfair stereotype of Java because it's been around so long (it's been unfairly associated with its older technologies, and doesn't receive recognition for its "modern" capabilities)? Is the negative stereotype of Java developers too strong? (Java is just no longer "cool") Are applications written in other languages really faster to build, easier to maintain, and do they perform better? Is Java only used by big companies who are too slow to adapt to a new language?

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  • Why doesn't lsof show localhost TCP connections in 14.04?

    - by sfussenegger
    I have two servers running 12.04.4 and 14.04.1 respectively. Both have nginx (port 80) and a Java process (port 8080). As expected, the lsof output for the Java process on the 12.04 machine shows a couple of established connections for port 8080 (e.g. TCP 127.0.0.1:8080->127.0.0.1:58067 (ESTABLISHED)) The 14.04 machine however does not. It only shows the listening port (TCP *:8080 (LISTEN)). I'm sure there are active connections though (confirmed by access logs, Java process status output, etc). What has changed from 12.04 to result in this behavior? Can this change be the cause for the "Too many open files" errors I'm getting since moving from 12.04 to 14.04? 12.04: $ dpkg -l lsof linux-image-virtual openjdk-7-jre nginx ||/ Name Version +++-===========================================-=========================================== ii linux-image-virtual 3.2.0.59.70 ii lsof 4.81.dfsg.1-1build1 ii nginx 1.6.1-1~precise ii openjdk-7-jre 7u65-2.5.1-4ubuntu1~0.12.04.1 14.04: $ dpkg -l lsof linux-image-virtual openjdk-7-jre nginx-full ||/ Name Version Architecture Description +++-=====================================-=======================-======================= ii linux-image-virtual 3.13.0.32.38 amd64 ii lsof 4.86+dfsg-1ubuntu2 amd64 ii nginx-full 1.4.6-1ubuntu3 amd64 ii openjdk-7-jre:amd64 7u65-2.5.1-4ubuntu1~0.1 amd64

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