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• NSFileCoordinator correct usage

  - by Johannes

  when writing a file using NSFileCoordinator i need to specify to correct NSFileCoordinatorWritingOptions. Although they are explained in detail, i am not sure when to use which one. The available options are: NSFileCoordinatorWritingForDeleting NSFileCoordinatorWritingForReplacing NSFileCoordinatorWritingForMoving NSFileCoordinatorWritingForMerging For example, what option is the correct one if i want to create a file(a plist for example)? Wich one when i modify a file? Can someone explain the NSFileCoordinatorWritingOptions for a better understanding? Greetings, Johannes

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• How to draw a diary in swt

  - by Johannes

  Hey, I am searching for a good mode to develop a application which shows 7 days and 24 hours (weekly view), knows somebody if there is a good tutorial? Or which layout would you use to design this? It should be possible to add events with a beginning and ending time... Thanks in advance Johannes

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• What does seem target in ANT

  - by Johannes

  Hello I am completly new to eclipse, liferay and ANT. I tried to set up a development environment and just finished the ext-anvironment (I also executed ant clean start). Now I've to execute "ant build-ext", following this tutorial: http://www.liferay.com/web/guest/community/wiki/-/wiki/Main/Setting%20up%20the%20Extension%20Environment D:\_liferay\ext>ant build-ext Buildfile: D:\_liferay\ext\build.xml But I receive the Message: BUILD FAILED Target "build-ext" does not exist in the project "ext". Can somebody tell me what I did wrong? Thanks in Advance Johannes

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• Why can't I reinstall MySQL?

  - by Johannes Nielsen

  I've been looking all around the Internet for an answer but didn't find anything. I hope you can help me now. I have a server with MySQL. From one day to another, MySQL didn't let me enter with my root password anymore (accsess denied for user 'root'@'localhost' using password: 'YES'). So I tried two ways to reset the password: No.1: I typed: shell> /etc/init.d/mysqld stop To stop MySQL. Then I restarted it skipping the grant-tables: shell> mysqld_safe --skip-grant-tables So I was able to log in as root and change the password using: mysql> UPDATE mysql.user SET Password = PASSWORD('MyNewPassword') WHERE User = 'root'; FLUSH PRIVILEGES; I restarted MySQL and tried to log in as root with my new password - didn't work. So I tried the solution that's described here: http://dev.mysql.com/doc/refman/5.0/en/resetting-permissions.html (I don't want to post it here because this post is already pretty long). Didn't work either. Actually it made it worse, because since that day, every time I try to start MySQL, it doesn't even ask me for my password, but I get: shell> ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (111) Well, I've looked up what it means and found that my mysqld.sock is missing. I tried to create it using touch but MySQL can't start with that socket. Now I'm trying to reinstall MySQL but everytime I type in shell> apt-get --purge remove mysql-server mysql-common mysql-client In that or any other order or every one of those three alone, I get: shell> Reading package lists... Done shell> Building dependency tree shell> Reading state information... Done shell> Package mysql-client is not installed, so not removed shell> Package mysql-server is not installed, so not removed shell> You might want to run 'apt-get -f install' to correct these: shell> The following packages have unmet dependencies: shell> libmysqlclient18 : Depends: mysql-common (>= 5.5.28-0ubuntu0.12.04.2) but it is not going to be installed shell> libmysqlclient18:i386 : Depends: mysql-common:i386 (>= 5.5.28-0ubuntu0.12.04.2) shell> mysql-client-5.5 : Depends: mysql-common (>= 5.5.28-0ubuntu0.12.04.2) but it is not going to be installed shell> mysql-server-5.5 : PreDepends: mysql-common (>= 5.5.28-0ubuntu0.12.04.2) but it is not going to be installed shell> psa-firewall : Depends: plesk-core (>= 11.0.9) but it is not installable shell> Depends: mysql-server but it is not going to be installed shell> psa-spamassassin : Depends: plesk-core (>= 11.0.9) but it is not installable shell> psa-vpn : Depends: plesk-core (>= 11.0.9) but it is not installable shell> Depends: plesk-base (>= 11.0.9) but it is not installable shell> Depends: mysql-server but it is not going to be installed shell> E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution). So I said to my self "let's just remove those files with depenencies, too" (that psa-stuff since plesk is virtual and can't be uninstalled)... Guess what happened: shell> Reading package lists... Done shell> Building dependency tree shell> Reading state information... Done shell> Package mysql-client is not installed, so not removed shell> Package mysql-server is not installed, so not removed shell> You might want to run 'apt-get -f install' to correct these: shell> The following packages have unmet dependencies: shell> libmysqlclient18 : Depends: mysql-common (>= 5.5.28-0ubuntu0.12.04.2) but it is not going to be installed shell> libmysqlclient18:i386 : Depends: mysql-common:i386 (>= 5.5.28-0ubuntu0.12.04.2) shell> mysql-client-5.5 : Depends: mysql-common (>= 5.5.28-0ubuntu0.12.04.2) but it is not going to be installed shell> mysql-server-5.5 : PreDepends: mysql-common (>= 5.5.28-0ubuntu0.12.04.2) but it is not going to be installed shell> E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution). Of course I tried apt-get -f install, too many times even. What am I doing wrong? No matter, which other packages I include into apt-get --purge remove, I always get new dependencies. Do I have to delete every MySQL-related directory and file manually? Hope there's someone out there who can help me! Cheers! EDIT: After trying apt-get purge mysql-server mysql-common mysql-client libmysqlclient18 libmysqlclient18:i386 mysql-client-5.5 mysql-server-5.5 psa-firewall psa-spamassassin psa-vpn Reading package lists... Done Building dependency tree Reading state information... Done Package mysql-client is not installed, so not removed Package mysql-server is not installed, so not removed You might want to run 'apt-get -f install' to correct these: The following packages have unmet dependencies: libdbd-mysql-perl : Depends: libmysqlclient18 (>= 5.5.13-1) but it is not going to be installed libmyodbc : Depends: libmysqlclient18 (>= 5.5.13-1) but it is not going to be installed libqt4-sql-mysql:i386 : Depends: libmysqlclient18:i386 (>= 5.5.13-1) but it is not going to be installed php5-mysql : Depends: libmysqlclient18 (>= 5.5.13-1) but it is not going to be installed ruby-mysql : Depends: libmysqlclient18 (>= 5.5.13-1) but it is not going to be installed E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution). So I tried to remove all these and got: Building dependency tree Reading state information... Done Package mysql-client is not installed, so not removed Package mysql-server is not installed, so not removed You might want to run 'apt-get -f install' to correct these:qlclient18:i386 mysql The following packages have unmet dependencies: libmysql-ruby1.8 : Depends: ruby-mysql but it is not going to be installed E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution). And actually I think removing that file, too solved my problem :-S Next time I'll try everything before asking :D Thank you Eric for keeping me couraged to just go on removing :D

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• Cannot connect my Ubuntu to TV with HDMI

  - by Hannes Johannes

  Another problem in my way to Ubuntu world.. Trying to make things work Linux way, day 4, problem #5321: I have a Compaq laptop and Nvidia graphic adapter. I also have Panasonic TV, which I thought I could use as a second screen just like I used to to when I was still using Windows Vista with my laptop. Plug the screen to the comp and voilá, I can watch my videos on big screen. And a boll***s I can, not with ubuntu anyways. Nvidia x server (or whatever it's called) does recognize my tv. It's very badly designed gui as I can never be sure has it saved my changes or not (most often not), but I recon I've got that one sorted out. I haven't found a way to set a primary monitor there, but it does see there are two monitors, my laptop and the tv. So far so good. But then? Ubuntu's own monitor setting only sees the laptop screen. If I reboot (with the HDMI cable connected) I end up having a black screen. Then I have to take the cable away, cut the power off and restart the comp.. Please, help, any help would be appreciated! I would so much love to like this linux more than windows but it surely takes a lot of trying...

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• Stop Cisco AnyConnect from locking down the NIC

  - by Johannes Rössel

  Cisco's VPN crapclients (including the AnyConnect one) have the nasty habit of clobbering all NICs on the system you're using them. The old client had a checkbox in the connection options that allowed you to use other network interfaces while being connected while the AnyConnect client doesn't have any options at all, seemingly. But they both lock down the network interface they are using to connect to the VPN. Since I am forced to use AnyConnect to actually have an internet connection and I like to control a second computer at home via RDP (over the same network interface so far) this doesn't quite work out. With the old client IPv6 still worked just fine, though AnyConnect seems to dislike that as well now. Is there any way to still use the same network interface for LAN access? I actually don't really care about any possible security implications (which might be why Cisco does this) as it's my freaking internet connection and not a secure way of working from home. The trade-off is quite different :-)

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• Why does my MySQL remote-connection fail (VLAN)?

  - by Johannes Nielsen

  ubuntu-community! Again I have a problem with my special friend MySQL :D I have got two servers - a database-server and a web-server - who are connected via VLAN. Now I want the web-server to have remote access to the database-server's MySQL. So I created the user user in mysql.user. user's Host is xxx.yyy.zzz.9 which is the internal IP-address of the web-server. xxx.yyy.zzz.0 is the network. I also created user with Host % . As long as I use MySQL on the database-server logging in as user, everything works fine. But trying to log in as user from xxx.yyy.zzz.9 using mysql -h xxx.yyy.zzz.8 -u user -p (where xxx.yyy.zzz.8 is the database-server's internal IP), I get ERROR 2003 (HY000): Can't connect to MySQL server on 'xxx.yyy.zzz.8' (110) So I tried to activate Bind-Address in the my.cnf file. Well, if I use xxx.yyy.zzz.8, nothing changes. But if I try xxx.yyy.zzz.9 and try to restart MySQL, I get mysql stop/waiting start: Job failed to start I checked the log files and found - nothing. The database-server's MySQL doesn't even register, that the web-server tries to connect remotely. My idea is, that maybe I didn't configure the VLAN properley, even though I asked someone who actually knows such stuff and he told me, I did everything right. What I wrote into /etc/networking/interfaces is: #The VLAN auto eth1 iface eth1 inet static address xxx.yyy.zzz..8 netmask 255.255.255.0 network xxx.yyy.zzz.0 broadcast xxx.yyy.zzz.255 mtu 1500 ifconfig returns eth1 Link encap:Ethernet HWaddr xxxxxxxxxxxxxx inet addr:xxx.yyy.zzz.8 Bcast:xxx.yyy.zzz.255 Mask:255.255.255.0 inet6 addr: xxxxxxxxxxxxxxx/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:241146 errors:0 dropped:0 overruns:0 frame:0 TX packets:9765 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:17825995 (17.8 MB) TX bytes:566602 (566.6 KB) Memory:fb900000-fb920000 for the eth1, what is, what I configured. (This is for the database-server, the web-server looks similar). ethtool eth1 returns: Settings for eth1: Supported ports: [ TP ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Supported pause frame use: No Supports auto-negotiation: Yes Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Advertised pause frame use: No Advertised auto-negotiation: Yes Speed: 100Mb/s Duplex: Full Port: Twisted Pair PHYAD: 1 Transceiver: internal Auto-negotiation: on MDI-X: Unknown Supports Wake-on: d Wake-on: d Current message level: 0x00000003 (3) drv probe Link detected: yes (This is for the database-server, the web-server looks similar). Actually I think, everything is right, but it still doesn't work. Is there someone with an idea? EDIT: I commented ou Bind-Address in my.cnf after it didn't work.

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• Is INT_MIN-1 an underflow or overflow?

  - by Johannes Schaub - litb

  I seem to remember that I was reading that underflow means you have a too small magnitude that cannot be presented anymore in a type overflow means you have a too large magnitude that cannot be presented anymore in a type However, in practice I perceive that the terms are used such that underflow means you have a too small value that cannot be presented anymore in a type overflow means you have a too large value that cannot be presented anymore in a type What is the correct meaning to use here? Are the terms defined differently for integer and floating point types?

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• Spurious alleged file corruption on Windows 7

  - by Johannes Rössel

  Recently my Laptop sometimes warns about corrupted files on the hard drive (Samsung SSD PB22-JS3 TM). This has only happened so far when updating (or checking out) an SVN repository with either TortoiseSVN or the command line Subversion client. The fun thing is that the corrupted file has always been a .svn directory (although the directory entry may contain files in that directory too, if they're small enough?—?which should be the case with SVN). However, when looking into the warned-about directory I notice nothing strange or unusual and don't get any more warnings about it and another try (SVN stops updating once that error occurs?—?TortoiseSVN even with an appropriate error message) of updating the working copy works (well, mostly; sometimes it does it again, albeit with a different directory). Since the laptop is only a few months old I doubt the SSD is failing already—five months of normal usage shouldn't be too surprising. Also it (so far) occurred only with SVN updates on a large repository. Maybe that's too many writes in a short time and some part between the software and the hardware doesn't quite catch up fast enough or so?—?I don't know enough about this to actually make an informed guess here. Anyone knows what's up here? ETA: Note to add: I've run chkdsk (it seems to schedule itself anyway when this happens) and it didn't find anything out of the ordinary.

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• Spurious alleged file corruption with an SSD

  - by Johannes Rössel

  Recently my Laptop sometimes warns about corrupted files on the hard drive (Samsung SSD PB22-JS3 TM). This has only happened so far when updating (or checking out) an SVN repository with either TortoiseSVN or the command line Subversion client. The fun thing is that the corrupted file has always been a .svn directory (although the directory entry may contain files in that directory too, if they're small enough?—?which should be the case with SVN). However, when looking into the warned-about directory I notice nothing strange or unusual and don't get any more warnings about it and another try (SVN stops updating once that error occurs?—?TortoiseSVN even with an appropriate error message) of updating the working copy works (well, mostly; sometimes it does it again, albeit with a different directory). Since the laptop is only a few months old I doubt the SSD is failing already—five months of normal usage shouldn't be too surprising. Also it (so far) occurred only with SVN updates on a large repository. Maybe that's too many writes in a short time and some part between the software and the hardware doesn't quite catch up fast enough or so?—?I don't know enough about this to actually make an informed guess here. Anyone knows what's up here? ETA: Note to add: I've run chkdsk (it seems to schedule itself anyway when this happens) and it didn't find anything out of the ordinary.

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• Wikimedia Commons not working properly from IE 8

  - by Johannes Rössel

  It happens fairly often that a page on Wikimedia Commons doesn't load in IE. This happens to me on both machines I use, each one Windows 7 with IE 8. The page just loads endlessly (or connects—can't really tell) and timeouts after a while. Repeated attempts (trying to load the same page in 5 to 10 tabs) sometimes work, but sometimes it takes a lot more tries. As far as I can tell, no other program is affected—Firefox or PowerShell have no trouble loading the page. Also, when I use Fiddler it seems to load fine on the first try as well. Anyone has an idea what might be going on? I didn't change any settings that I am aware of (and most likely didn't do so in the same way on both machines). Preemptive note: I don't need advice in the form of »Use another browser instead.«.

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• as3 3D camera lookat

  - by Johannes Jensen

  I'm making a 3D camera scene in Flash, draw using drawTriangles() and rotated and translated using a Matrix3D. I've got the camera to look after a specific point, but only on the Y-axis, using the x and z coordinates, here is my code so far: var dx:Number = camera.x - lookAt.x; var dy:Number = camera.y - lookAt.y; var dz:Number = camera.z - lookAt.z; camera.rotationY = Math.atan2(dz, dx) * (180 / Math.PI) + 270; so no matter the x or z position, the point is always on the mid of the screen, IF and only if y matches with the camera. So what I need is to calculate the rotationX (which are measured in degrees not radians), and I was wondering how I would do this?

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• Is there a quick way of undoing a folder change in Far Manager?

  - by Johannes Rössel

  I love Far Manager. However, it has a feature to quickly go to the root directory of a drive with Ctrl+\. I do sometimes need and use this feature, but more frequently I use Ctrl+? to quickly insert the file name under the cursor into the command line. As it so happens, the ? key is located dangerously close to \ which is why I sometimes erroneously go the root directory (which then is doubly unfortunate since I originally wanted to work with a file in the directory I was in). Now I could probably just redefine Ctrl+\ to do nothing, although I still sometimes need that (can be replicated with a quick cd\, though). But Windows Explorer, in the wake of the WWW, provided us with a handy directory history and two separate ways of navigating backwards: backwards through the history and backwards through the hierarchy. Is there something quick and easy to get back to the folder I were in? This is less of an issue in C:\Users\Me (still nagging) but more so in deeper hierarchies.

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• Where does power consumption go in a computer?

  - by Johannes Rössel

  Today we had a weird discussion over lunch: What exactly causes power consumption in a computer, particularly in the CPU? Figures you usually see indicate that only a percentage (albeit a large one) of the power consumption ends up in heat. However, what exactly does happen with the rest? A CPU isn't (anymore) a device that mechanically moves parts, emits light or uses other ways of transforming energy. Conservation of energy dictates that all energy going in has to go out somewhere and for something like a CPU I seriously can't imagine that output being anything but heat. Us being computer science instead of electrical engineering students certainly didn't help in accurately answering the question.

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• C++ Library API Design

  - by johannes

  I'm looking for a good resource for learning about good API design for C++ libraries, looking at shared objects/dlls etc. There are many resources on writing nice APIs, nice classes, templates and so on at source level, but barely anything about putting things together in shared libs and executables. Books like Large-Scale C++ Software Design by John Lakos are interesting but massively outdated. What I'm looking for is advice i.e. on handling templates. With templates in my API I often end up with library code in my executable (or other library) so if I fix a bug in there I can't simply roll out the new library but have to recompile and redistribute all clients of that code. (and yes, I know some solutions like trying to instantiate at least the most common versions inside the library etc.) I'm also looking for other caveats and things to mind for keeping binary compatibility while working on C++ libraries. Is there a good website or book on such things?

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• favored keyboard layout keeps being replaced

  - by Johannes Bauer

  My Ubuntu was installed with only a German keyboard layout configured. I much prefer the English UK (extended WinKeys) layout and therefore added that option. However, the selected keyboard layout kept reverting to German seemingly at random, and so I removed it through the layout indicator's preferences dialog. Strangely that didn't help: every now and then the English keyboard layout is replaced by the German one and that change shows up in the layout indicator. I guess the unwanted layout must still be configured somewhere and I must be hitting some key combination to switch to it. But the preferences dialog for the layout indicator doesn't show any such combination. I'm on Ubuntu 12.04 and I'm using Xfce 4.8. PS: This is similar but not the same as this or this issue: when I log in, the correct layout is usually selected (and only that layout is configured). The layout is changed completely at random while I'm working.

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• How can I get Skype to not stay minimized in the task bar?

  - by Johannes Rössel

  Since two or three updates Skype insists taking up a taskbar slot for its main window (I set it to use the “Compact View”, but it applies to the default view as well). Since I don't need the main window most of the time since I have individual windows for the contacts I'm writing to this is ? a taskbar button wasted if no other Skype windows are open and ? still in the way when there are other windows open as it's a window I never need but still sometimes mis-click on when the thumbnails show up. Is there a way to send Skype to the Notification area again?

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• Is there a usable HTML web gallery template for Lightroom 2?

  - by Johannes Rössel

  The built-in HTML gallery unfortunately generates invalid HTML markup so its looks are likely more coincidence than proper design. That aside its JavaScript usage prevents using the middle mouse button to open an image in a new tab. A look at the few free HTML gallery templates out there shows me that there seems to be little interest in building an actual HTML gallery which doesn't use JavaScript. Most of them are using JS to build fancy animations or in-page popup boxes containing the image. This may be nice for some people but at least one person who looks at my images is on dial-up and quickly opening all images in individual tabs to let them load and then close the connection is very nice to have there. Anyone seen such a gallery template; i. e. simple, plain HTML without JS? My HTML/CSS skills aren't that good that I can develop such a thing on my own, unfortunately.

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• Acer Allionone Z5810 Touchscreen Issues 12.04

  - by Johannes

  I have an Acer Allionone Z5810, and I can't get the touchscreen to work after I install 12.04. Here is the lsusb output: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 001 Device 003: ID 0596:0508 MicroTouch Systems, Inc. Bus 001 Device 004: ID 04b8:0005 Seiko Epson Corp. Printer Bus 001 Device 005: ID 07ca:1336 AVerMedia Technologies, Inc. Bus 002 Device 003: ID 04ca:0058 Lite-On Technology Corp. Bus 002 Device 004: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode) Bus 002 Device 005: ID 04f2:b23f Chicony Electronics Co., Ltd xinput --list Virtual core pointer id=2 [master pointer (3)] ? ? Virtual core XTEST pointer id=4 [slave pointer (2)] ? ? Lite-On Technology Corp. Wireless Device id=9 [slave pointer (2)] ? ? Lite-On Technology Corp. Wireless Device id=10 [slave pointer (2)] ? Virtual core keyboard id=3 [master keyboard (2)] ? Virtual core XTEST keyboard id=5 [slave keyboard (3)] ? Power Button id=6 [slave keyboard (3)] ? Power Button id=7 [slave keyboard (3)] ? Lite-On Technology Corp. Wireless Device id=8 [slave keyboard (3)] ? USB 2.0 camera id=11 [slave keyboard (3)] ? AT Translated Set 2 keyboard id=12 [slave keyboard (3)] My xorg.conf contains: nvidia-xconfig: X configuration file generated by nvidia-xconfig nvidia-xconfig: version 304.48 (buildmeister@swio-display x86-rhel47-04.nvidia.com) Sun Sep 9 21:31:39 PDT 2012 Section "ServerLayout" Identifier "Layout0" Screen 0 "Screen0" InputDevice "Keyboard0" "CoreKeyboard" InputDevice "Mouse0" "CorePointer" InputDevice "TouchScreen" EndSection Section "Files" EndSection Section "InputDevice" Identifier "TouchScreen" Driver "microtouch" Option "Type" "finger" Option "Device" "/dev/ttyS3" Option "ScreenNo" "0" Option "MinX" "0" Option "MaxX" "16383" Option "MinY" "0" Option "MaxY" "16383" Option "SendCoreEvents" "yes" EndSection Section "InputDevice" # generated from default Identifier "Mouse0" Driver "mouse" Option "Protocol" "auto" Option "Device" "/dev/psaux" Option "Emulate3Buttons" "no" Option "ZAxisMapping" "4 5" EndSection Section "InputDevice" # generated from default Identifier "Keyboard0" Driver "kbd" EndSection Section "Monitor" Identifier "Monitor0" VendorName "Unknown" ModelName "Unknown" HorizSync 28.0 - 33.0 VertRefresh 43.0 - 72.0 Option "DPMS" EndSection Section "Device" Identifier "Device0" Driver "nvidia" VendorName "NVIDIA Corporation" EndSection Section "Screen" Identifier "Screen0" Device "Device0" Monitor "Monitor0" DefaultDepth 24 SubSection "Display" Depth 24 EndSubSection EndSection

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• Underbraces in Word math zones and dealing with stretchy parentheses

  - by Johannes Rössel

  Parentheses in Word usually stretch with whatever they're containing. This might be un-noticeable for things like but for stuff like it's definitely nice, especially compared to the fact that naïve LaTeX users often produce uglinesses such as There is a problem, however, when using under-/overbraces in math and putting parentheses around the complete term it becomes ugly. For simple things like shown here this can be solved by not letting the parentheses stretch which looks almost right. However, for more complex things it's certainly not an option: Both variants look horrible. So is there a way of letting the parentheses only stretch around the actual term parts, not including the under-/overbraces? Those are frequently used for annotations of individual pieces, so simply not using them is a bad idea too. In LaTeX you can get away with guesswork and using explicit sizes for the parentheses instead of relying on \left and \right but I haven't found a comparable option in Word yet. Since the underbrace is (tree-wise) a sibling of the term in parentheses it probably simply has to stretch and there probably can't be an algorithm that determines when to stretch or when not, considering that \above and \below are used for annotations as well but also for other things where perentheses have to stretch. Also, since the parenthesized expression is opaque from the outside one has to put the underbrace inside. From a markup point of view, at least. One can probably draw the rest around but that falls apart when styles change and wouldn't be a good idea either.

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• Underbraces in Word math zones and dealing with parentheses

  - by Johannes Rössel

  Parentheses in Word usually stretch with whatever they're containing. This might be un-noticeable for things like but for stuff like it's definitely nice, especially compared to the fact that naïve LaTeX users often produce uglinesses such as There is a problem, however, when using under-/overbraces in math and putting parentheses around the complete term it becomes ugly. For simple things like shown here this can be solved by not letting the parentheses stretch which looks almost right. However, for more complex things it's certainly not an option: Both variants look horrible. So is there a way of letting the parentheses only stretch around the actual term parts, not including the under-/overbraces? Those are frequently used for annotations of individual pieces, so simply not using them is a bad idea too. In LaTeX you can get away with guesswork and using explicit sizes for the parentheses instead of relying on \left and \right but I haven't found a comparable option in Word yet. Since the underbrace is (tree-wise) a sibling of the term in parentheses it probably simply has to stretch and there probably can't be an algorithm that determines when to stretch or when not, considering that \above and \below are used for annotations as well but also for other things where perentheses have to stretch. Also, since the parenthesized expression is opaque from the outside one has to put the underbrace inside. From a markup point of view, at least. One can probably draw the rest around but that falls apart when styles change and wouldn't be a good idea either.

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• Repacked proprietary software keeps updating the same deb

  - by Johannes

  I repacked a proprietary program delivered as tar file to a deb file for having a company wide repository. I used reprepro to set up a repository and signed it. A unix timestamp is faking a versioning numbering, so I can have different (real) versions installed at the same time. Almost everything works as expected. The deb file looks like this: mysoft8.0v6_1366455181_amd64.deb Only problem on a client machine it tries to install the same deb file over and over again because it thinks its an update. What do I miss: control file in deb package looks like this: Package: mysoft8.0v6 Version: 1366455181 Section: base Priority: optional Architecture: amd64 Installed-Size: 1272572 Depends: Maintainer: me Description: mysoft 8.0v6 dpkg repackaging and the config in the repository: /mirror/mycompany.inc/conf/distributions: Origin: apt.mycompany.inc Label: apt repository Codename: precise Architectures: amd64 i386 Components: main Description: Mycompany debian/ubuntu package repo SignWith: yes Pull: precise Help much appreciated Added guide: This Is the guide I used to create the repository.

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• IE won't load directly-linked PNGs

  - by Johannes Rössel

  I remember having this issue in the past with previous versions as well but recently it started here again. Whenever I click a link that links directly to a PNG image I get a download dialog; the browser won't display it on its own. Inline PNGs are fine, though. Any ideas what causes this? It did work in the past. Preemptive warning: I'm not looking for advice to change my browser; I'm looking for a solution to a specific problem with one piece of software. Just ignore the fact that it may have religious importance.

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• Problem with deploying simple Spring MVC Portlet to Liferay 5.2.3

  - by Johannes Hipp

  Hello, I try to deploy a simple spring portlet in ext (I can't use Plugins SDK...) on Liferay 5.2.3 My portlet: ext-impl/src: package: com.ext.portlet.springmvc HelloWorldController.java [code] package com.ext.portlet.springmvc; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.web.servlet.ModelAndView; import org.springframework.web.servlet.mvc.Controller; public class HelloWorldController implements Controller { public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String aMessage = "Hello World MVC!"; ModelAndView modelAndView = new ModelAndView("hello_world"); modelAndView.addObject("message", aMessage); return modelAndView; } } [/code] ext-lib: - jstr.jar - spring-webmvc.jar - spring-webmvc-portlet.jar - spring.jar - standard.jar ext-web/docroot/html/portlet/ext/springmvc/hello_world.jsp [code] <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <html> <body> <p>This is my message: ${message}</p> </body> </html> [/code] ext-web/docroot/html/portlet/ext/springmvc/index.jsp [code] <html> <body> <p>Hi</p> </body> </html> [/code] ext-web/docroot/WEB-INF/springmvc-servlet.xml [code] <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd"> <bean name="/hello_world.html" class="com.ext.portlet.springmvc.HelloWorldController"/> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/> <property name="prefix" value="/jsp/"/> <property name="suffix" value=".jsp"/> </bean> </beans> [/code] ext-web/docroot/WEB-INF/portlet-ext.xml [code] <portlet> <portlet-name>springmvc</portlet-name> <portlet-class>org.springframework.web.portlet.DispatcherPortlet</portlet-class> <supports> <mime-type>text/html</mime-type> <portlet-mode>view</portlet-mode> </supports> <portlet-info> <title>Simple JSP Portlet</title> </portlet-info> <security-role-ref> <role-name>power-user</role-name> </security-role-ref> <security-role-ref> <role-name>user</role-name> </security-role-ref> </portlet> [/code] ext-web/docroot/WEB-INF/web.xml [code] <?xml version="1.0"?> <web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" version="2.4"> <servlet> <servlet-name>springmvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springmvc</servlet-name> <url-pattern>*.html</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file> jsp/index.jsp </welcome-file> </welcome-file-list> </web-app> [/code] Are there some mistakes? I get this error, when I try to deploy: [code] Website OC4J 10g (10.1.3) Default Web Site definiert ist. Error creating bean w ith name 'com.liferay.portal.kernel.captcha.CaptchaUtil' defined in class path r esource [META-INF/util-spring.xml]: Cannot create inner bean 'com.liferay.portal .captcha.CaptchaImpl#1424b7b' of type [com.liferay.portal.captcha.CaptchaImpl] w hile setting bean property 'captcha'; nested exception is org.springframework.be ans.factory.BeanCreationException: Error creating bean with name 'com.liferay.po rtal.captcha.CaptchaImpl#1424b7b' defined in class path resource [META-INF/util- spring.xml]: Instantiation of bean failed; nested exception is org.springframewo rk.beans.BeanInstantiationException: Could not instantiate bean class [com.lifer ay.portal.captcha.CaptchaImpl]: Constructor threw exception; nested exception is java.lang.NullPointerException [/code] Hope anybody can help me... Thank you very much. Best regards, Johannes

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• luntbuild + maven + findbugs = OutOfMemoryException

  - by Johannes

  Hi, I've been trying to get Luntbuild to generate and publish a project site for our project including a Findbugs report. All other reports (Cobertura, Surefire, JavaDoc, Dashboard) work fine, but Findbugs bails out with an OutOfMemoryException. Excluding findbugs from report generation fixes the build --- although obviously without a Findbugs report. The funny thing is that I first encountered this problem locally and solved it by setting MAVEN_OPTS=-Xmx512m. This does not seem to be enough in Luntbuild, however: setting that exact same option as an environment variable of my builder doesn't make a difference. I've found a couple of posts on the 'net stating you should also add -XX:MaxPermSize=512m to MAVEN_OPTS and/or pass -Dmaven.findbugs.jvmargs=-Xmx512m to mvn.bat. None of these (or their combination) seem to help though so any hints would be greatly appreciated! Cheers, Johannes Relevant information: Luntbuild is 1.5.6, Maven is 2.1.0, findbugs-maven-plugin is 2.0.1. This is the Findbugs section of the relevant pom.xml: <plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>findbugs-maven-plugin</artifactId> <version>2.0.1</version> </plugin> This is the head of my build log: User "luntbuild" started the build Perform checkout operation for VCS setting: Vcs name: Subversion Repository url base: http://some.repository.com/repo/ Repository layout: multiple Directory for trunk: trunk Directory for branches: branches Directory for tags: tags Username: xxxx Password:xxxx Web interface: ViewVC URL to web interface: http://some.repository.com/repo/ Quiet period: modules: Source path: somepath, Branch: , Label: , Destination path: somewhere Source path: somepath, Branch: somewhere1.0.x, Label: , Destination path: somewhere-1.0.x Source path: somepath, Branch: somewhere1.1.x, Label: , Destination path: somewhere-1.1.x Update url: http://some.repository.com/repo//trunk Duration of the checkout operation: 0 minutes Perform build with builder setting: Builder name: default Builder type: Maven2 builder Command to run Maven2: "C:\maven\apache-maven-2.1.0\bin\mvn.bat" -e -f somewhere\pom.xml -P site -Dmaven.test.skip=false -DbuildDate="Tue Nov 24 11:13:24 CET 2009" -DbuildVersion="site-core138" -Dsvn.username=xxxx -Dsvn.password=xxxx -DstagingSiteURL=file:///C:/luntbuild/core-reports -Dmaven.findbugs.jvmargs=-Xmx512m Directory to run Maven2 in: Goals to build: site:stage site:stage-deploy Build properties: buildVersion="site-core138" artifactsDir="C:\\Program Files\\Luntbuild\\publish\\somewhere\\site-core\\site-core138\\artifacts" buildDate="Tue Nov 24 11:13:24 CET 2009" junitHtmlReportDir="" Environment variables: MAVEN_OPTS="-Xmx512m -XX:MaxPermSize=512m" Build success condition: result==0 and builderLogContainsLine("INFO","BUILD SUCCESSFUL") Execute command: Executing 'C:\maven\apache-maven-2.1.0\bin\mvn.bat' with arguments: '-e' '-f' 'somewhere\pom.xml' '-P' 'site' '-Dmaven.test.skip=false' '-DbuildDate=Tue Nov 24 11:13:24 CET 2009' '-DbuildVersion=site-core138' '-Dsvn.username=xxxxxx' '-Dsvn.password=xxxxxx' '-DstagingSiteURL=file:///C:/luntbuild/reports' '-Dmaven.findbugs.jvmargs=-Xmx512m' '-DbuildVersion=site-core138' '-DartifactsDir=C:\\Program Files\\Luntbuild\\publish\\somewhere\\site-core\\site-core138\\artifacts' '-DbuildDate=Tue Nov 24 11:13:24 CET 2009' '-X' 'site:stage' 'site:stage-deploy' Tail of my build log: Analyzed: C:\luntbuild\somewhere-work\somewhere\...\SomeClass.class ... Analyzed: C:\luntbuild\somewhere-work\somewhere\...\target\classes Aux: C:\luntbuild\somewhere-work\somewhere\...\target\classes Aux: c:\maven\local-repo\...\somejar-1.1.1.1-SNAPSHOT.jar Aux: c:\maven\local-repo\commons-lang\commons-lang\2.3\commons-lang-2.3.jar .... Aux: c:\maven\local-repo\org\openoffice\ridl\3.1.0\ridl-3.1.0.jar Aux: c:\maven\local-repo\org\openoffice\unoil\3.1.0\unoil-3.1.0.jar [INFO] ------------------------------------------------------------------------ [ERROR] FATAL ERROR [INFO] ------------------------------------------------------------------------ [INFO] Java heap space [INFO] ------------------------------------------------------------------------ [DEBUG] Trace java.lang.OutOfMemoryError: Java heap space at java.util.HashMap.(HashMap.java:209) at edu.umd.cs.findbugs.ba.type.TypeAnalysis$CachedExceptionSet.(TypeAnalysis.java:114) at edu.umd.cs.findbugs.ba.type.TypeAnalysis.getCachedExceptionSet(TypeAnalysis.java:688) at edu.umd.cs.findbugs.ba.type.TypeAnalysis.computeThrownExceptionTypes(TypeAnalysis.java:439) at edu.umd.cs.findbugs.ba.type.TypeAnalysis.transfer(TypeAnalysis.java:411) at edu.umd.cs.findbugs.ba.type.TypeAnalysis.transfer(TypeAnalysis.java:89) at edu.umd.cs.findbugs.ba.Dataflow.execute(Dataflow.java:356) at edu.umd.cs.findbugs.classfile.engine.bcel.TypeDataflowFactory.analyze(TypeDataflowFactory.java:82) at edu.umd.cs.findbugs.classfile.engine.bcel.TypeDataflowFactory.analyze(TypeDataflowFactory.java:44) at edu.umd.cs.findbugs.classfile.impl.AnalysisCache.analyzeMethod(AnalysisCache.java:331) at edu.umd.cs.findbugs.classfile.impl.AnalysisCache.getMethodAnalysis(AnalysisCache.java:281) at edu.umd.cs.findbugs.classfile.engine.bcel.CFGFactory.analyze(CFGFactory.java:173) at edu.umd.cs.findbugs.classfile.engine.bcel.CFGFactory.analyze(CFGFactory.java:64) at edu.umd.cs.findbugs.classfile.impl.AnalysisCache.analyzeMethod(AnalysisCache.java:331) at edu.umd.cs.findbugs.classfile.impl.AnalysisCache.getMethodAnalysis(AnalysisCache.java:281) at edu.umd.cs.findbugs.ba.ClassContext.getMethodAnalysis(ClassContext.java:937) at edu.umd.cs.findbugs.ba.ClassContext.getMethodAnalysisNoDataflowAnalysisException(ClassContext.java:921) at edu.umd.cs.findbugs.ba.ClassContext.getCFG(ClassContext.java:326) at edu.umd.cs.findbugs.detect.BuildUnconditionalParamDerefDatabase.analyzeMethod(BuildUnconditionalParamDerefDatabase.java:103) at edu.umd.cs.findbugs.detect.BuildUnconditionalParamDerefDatabase.considerMethod(BuildUnconditionalParamDerefDatabase.java:93) at edu.umd.cs.findbugs.detect.BuildUnconditionalParamDerefDatabase.visitClassContext(BuildUnconditionalParamDerefDatabase.java:79) at edu.umd.cs.findbugs.DetectorToDetector2Adapter.visitClass(DetectorToDetector2Adapter.java:68) at edu.umd.cs.findbugs.FindBugs2.analyzeApplication(FindBugs2.java:971) at edu.umd.cs.findbugs.FindBugs2.execute(FindBugs2.java:222) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:86) at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:230) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:912) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:756) [INFO] ------------------------------------------------------------------------ [INFO] Total time: 17 minutes 16 seconds [INFO] Finished at: Tue Nov 24 11:31:23 CET 2009 [INFO] Final Memory: 70M/127M [INFO] ------------------------------------------------------------------------ Maven2 builder failed: build success condition not met! Note that apparently maven only uses 70MB... but that probably doesn't mean anything since the Findbugs plugin forks its own process.

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