2005-04-04
I did a small presentation on the subject of internationalization [http://www.vankuik.nl/bart/docs/i18n_part1.ppt.zip . . .
1K - last updated 2005-04-05 19:45 UTC by 7031
2005-06-23
I've created another little [http://www.oddmuse.org/ Oddmuse] module to display a Google Free Search . . . Free Search] page and copy the code, or alternatively, copy the [https://www.google.com/adsense/ws-overview . . .
2K - last updated 2005-06-24 07:55 UTC by 7031
2006-04-24 SIRs for dummies
Previously, I showed some [http://www.vankuik.nl/cgi-bin/wiki.cgi/2006-02-23 pictures on the electronics] . . . stays equal. The right circuit is an alternative, an adjustment of the left circuit so it delivers . . .
4K - last updated 2006-05-15 15:14 UTC by 7031
2006-04-27 Perl modules and CGI
Suppose you have a bunch of Perl scripts and modules. Those modules have differing versions and you don't . . . /home/bartvk/public_html/projectWorldDomination/cgi-bin> SetEnv PERLLIB "/home/bartvk/src/projWorldDom/client/perl/lib" . . .
2K - last updated 2006-04-27 08:39 UTC by 7031
2007-03-12 Better measurement
In the [[2007-03-11_Bug_in_software_or_hardware|previous entry]], I talked about correcting offsets when . . . mode where more time is taken. It's a tradeoff naturally. . . .
1K - last updated 2007-03-12 08:42 UTC by bvankuik
2007-08-05 Adding salt to Auth class
If you're using PHP, you probably use or at least know of the PEAR classes at http://pear.php.net/. It's . . . like: $mysalt = 'wd3'; This should be concatenated before all passwords when saving them in the . . .
2K - last updated 2007-08-05 08:08 UTC by 7031
2007-09-26 Fiske steps testing
We did some testing of the new Fiske step software yesterday. To see how the device (the SIR chip) behaves, . . . on the FFO control line (FFO CL). (For an explanation of the SIR including FFO control line, see entry . . . of points. The green line is a possible combination of FFO bias current and FFO voltage. The fat . . .
5K - last updated 2007-09-26 14:16 UTC by 7031
2007-10-26 PEARs HTML QuickForm Controller goodness
I'm in the middle of coding up a multi-page wizard-style bunch of PHP pages. The MVC pattern is implicit . . . HTML_QuickForm_Controller]. In combination with [http://pear.php.net/package/HTML_QuickForm . . .
3K - last updated 2007-10-27 07:39 UTC by 7031
2007-11-15 diff tools
Previously, I've [http://debaday.debian.net/2007/05/02/meld-graphical-tool-to-diff-and-merge-files/ written . . . Visually it's pretty self-explanatory. Red parts are not in the other file, blue ones . . .
1K - last updated 2007-11-15 11:02 UTC by 7031
2007-11-19 Finding an optimum
As mentioned [[2007-09-26_Fiske_steps_testing|before]], we need an algorithm to find the correct setting . . . in a cloud of points. I've gotten an explanation on how Andrey (the software developer of the . . .
5K - last updated 2007-11-22 17:00 UTC by 7031
2007-11-28 Testing optimization
After running the Fiske macro for the setup part, we have a nice value for the FFO Control Line (CL) . . . be increased with this percentage as well. Alternatively, we increase the number of steps that the . . .
6K - last updated 2007-12-06 17:45 UTC by 7031
2008-04-16 Qt database widgets part 2
Last time I got away with creating a custom QItemDelegate but not this time. I need a radiobutton for . . . be set to 1 (one). This database column designates the default or current setting. Presenting the . . .
1K - last updated 2008-04-21 14:53 UTC by 7031
2008-05-22 Configuring AIDE
Today I installed AIDE on a CentOS 5 server. This package is an alternative to the traditional Tripwire. . . .
2K - last updated 2008-05-24 17:41 UTC by 7031
2008-06-23 Shamroc DAC board
The [http://en.wikipedia.org/wiki/Digital-to-analog_converter DAC] testboard for the Shamroc (part of . . . earth models? * Why is the instrument noise dominated by electronic noise? * How should the performance . . . requirements be read? * Explanation of the subsystems in the ASIC * Why are commercial . . .
2K - last updated 2008-06-24 09:11 UTC by 7031
2008-09-22 Reading out a multimeter
We'd like to test the DAC board by reading it out with an HP 3458A multimeter (now Agilent, but this . . . the measurement is taken and I'd like to eliminate those (or at least, move them to the initialization . . . this and the default setting is OFF. So I eliminated this command from the script. To find out whether . . .
3K - last updated 2008-09-25 11:27 UTC by 7031
2008-10-03 Software architecture decisions
Today I bumped into a problem which required some decisions about the software. In short it comes down . . . for this: * Create a special packet * Eliminate the first broadcast for the new packets * Eliminate . . .
3K - last updated 2008-10-07 09:40 UTC by 7031
2008-10-09 Reading out a multimeter part 2
Again busy with the HP 8345A multimeter. The electronics guy suspected that the default settings were . . . since you have something to turn back to. Unfortunately, the state after power-on isn't predefined. . . . and that's what was causing the early termination of readings. That's all fine and dandy, but . . . multiple measurements, disable the termination of reads when receiving the EOS (instead rely . . . do a read call exactly for those. After eliminating the SWEEP command, we also eliminated the TRIGGER . . .
5K - last updated 2008-10-17 10:23 UTC by 7031
2008-12-19 Linux USB device handling
For reading/operating lab instruments like multimeters and power supplies, the [http://en.wikipedia.org/wiki/IEEE-488 . . . $ lsusb ... Bus 007 Device 003: ID 3923:702b National Instruments Corp. ... Check the string 1234:5678 . . .
5K - last updated 2009-01-05 13:54 UTC by 7031
2009-03-27 LEON3
At work, we're currently experimenting with the [http://en.wikipedia.org/wiki/LEON LEON3] processor. . . . But there you go. The LEON3 is an alternative for an FPGA that's connected with a serial port . . .
1K - last updated 2009-03-27 08:34 UTC by 7031
2009-06-06 Getting Chrome running on Fedora
Recently, the [http://dev.chromium.org/getting-involved/dev-channel|alpha builds of Chrome for Linux] . . . became available. Unfortunately, only Debian and Ubuntu packages were released. . . .
2K - last updated 2009-06-06 08:55 UTC by 7031
2010-01-17 Calibrate good times
We have a DT-470 temperature sensor in the [http://en.wikipedia.org/wiki/Cryostat cryostat] of the project . . . the cryostat was not cooled, so we have a combination of raw value (as read from electronics) and . . .
3K - last updated 2010-01-17 13:16 UTC by 7031
2010-07-20 Coverity demo
We got a demo from the [http://www.coverity.com/ Coverity] people. We ran their tool on our code base . . . in advance. Via a WebEx session we got an explanation of the results, but first we got an overview . . . with the classification, there is a short explanation of this type of issue. Clicking further will . . .
3K - last updated 2010-07-20 09:40 UTC by 7031
2010-10-05 Ubuntu on an old machine
If you want to use Ubuntu on an older PC, then memory might be tight. I recently got a HP/Compaq 7100dc . . . cups system-config-printer-gnome evolution Explanation: this removes support for braille input devices, . . . Effects and select None, then click Close. Explanation: this switches your window manager from Compiz . . .
2K - last updated 2010-10-05 08:23 UTC by 7031
2010-12-06 Installing OpenOffice in a home directory
To install OpenOffice in a home directory on Debian, take the following steps: Download the tarball with . . . with the .deb packages: $ cd OOO320_m18_native_packed-1_en-US.9502/DEBS Unpack these to your . . .
1K - last updated 2010-12-06 14:17 UTC by 7031
2010-12-25 Google Chrome extensions I cannot live without
In the vein of the previous post; a list of Google Chrome extensions that are very useful: * [https://chrome.google.com/extensions/detail/dlopnnfglheodcopccdllffcijjeenkj . . . e-mail address you got from Amazon Or as an alternative: * [https://chrome.google.com/extensions/detail/fldildgghjoohccppflaohodcnmlacpb . . .
2K - last updated 2011-01-31 21:30 UTC by 7031
2011-03-03 SAFARI software and hardware setup
Below is a basic setup of our software and electronics. [[image:SAFARI setup software and electronics]] . . . port in raw ethernet frames, then concatenates the packages and transfers them over TCP to the . . . for the daemon, is that the EGSE server cannot natively receive data over raw ethernet. Thus we use . . . doesn't support jumbo frames. So we concatenate the CCSDS packets on the PC with the ethernet . . .
2K - last updated 2011-04-21 12:07 UTC by 7031
2011-04-20 Telfort ADSL and VoIP Planet
(English readers: this is an explanation on how to configure the modem of a Dutch ISP for VOIP usage). . . . Vul het tweede tabblad als volgt in, waarbij je natuurlijk de vermeldde SIP Account Number en Username . . .
2K - last updated 2011-04-21 14:23 UTC by 7031
2011-04-21 Not enough CPU time
The datarate of the Demux board of the Safari project is quite high for a desktop PC to work with, even . . . PC was installed to run a daemon, which concatenates the large amount of small ethernet packets into . . .
3K - last updated 2011-04-21 11:47 UTC by 7031
2011-09-08 From iPhone to Android
''This is part 3 of my series where I document going from an iPhone to Android 2.3, running on the Samsung . . . store] (only available for US residents, unfortunately). . . .
3K - last updated 2011-09-13 06:53 UTC by 7031
2011-09-13 From iPhone to Android
''This is part 4 of my series where I document going from an iPhone to Android 2.3, running on the Samsung . . . thing about Android is, that there's an alternative in the Android Market for lots of standard apps. . . .
2K - last updated 2011-09-20 13:07 UTC by 7031
2011-10-05 From iPhone to Android
''This is part 8 of my series where I document going from an iPhone to Android 2.3, running on the Samsung . . . out, is a royal pain in the ass with the combination Android and OS X. There's a whole bunch of sub-optimal . . .
2K - last updated 2011-10-25 08:43 UTC by 7031
2011-10-11 OS X and Vim
Vim comes with OS X by default, but it doesn't come with X11 support. You can always install [http://code.google.com/p/macvim/ . . . of us prefer to use vim in the terminal. Unfortunately, because of the lack of X11 support, copying/pasting . . .
1K - last updated 2011-10-11 09:49 UTC by 7031
2011-10-27 Compact Google Calendar header
== UPDATE == I have created an official extension, available in the Chrome Web Store: [[https://chrome.google.com/webstore/detail/fgacjjonbdediegfemghimnjpmejecnd . . . to Google Calendar are looking nice, but unfortunately the header and navigation take up far too much . . .
1K - last updated 2011-11-04 08:30 UTC by 7031
2011-12-12 Protocol stuff
We have an interesting situation here at work, concerning our internally developed binary protocol. There . . . purposes. In the current firmware/software combination, the firmware generates a large number of packets . . . called the Ethernet Daemon, and then concatenated into a larger packet, where the Data Header/Data . . . part are repeated. [[image:CCSDSpacketconcatenation.png]] The discussion piece currently, is how . . . unsigned integer, double or zero-terminated string Basically samples64 says something about . . .
5K - last updated 2011-12-15 15:40 UTC by 7031
2012-02-09 Writing ethernet packets on OS X and BSD
If you want to write raw ethernet frames, you can use so-called raw sockets. Unfortunately, there's a . . . <net/bpf.h> // Fill in your source and destination MAC address unsigned char dest_mac[ETHER_ADDR_LEN] . . .
8K - last updated 2012-02-09 15:49 UTC by 7031
2012-05-19 Telfort ADSL modem Zyxel P-2812HNU-F1 and VoIP Planet
(English readers: this is an explanation on how to configure the modem of a Dutch ISP for VOIP usage). . . . in, en daarna Username en Password. Waarbij je natuurlijk de vermeldde SIP Account Number en Username . . .
2K - last updated 2012-05-19 09:50 UTC by 7031
2012-11-09 Full-text searching
In a previous project, I solved the full text search problem as follows. Management overview: it's very . . . of the data you're looking for (i.e. a concatenation of business name, address, reviews, locations . . . As you can see, the summary is just a concatenation of name, address, category, reviews, phone number, . . . fields from any of the tables were concatenated into a summary. I created a database row-level . . . so that each insert or update would concatenate a buch of fields and do an insert into 'fulltexts' . . .
2K - last updated 2012-11-09 06:03 UTC by 7031
2013-01-07 Onward flight not checked-in
When flying internationally with multiple legs, I've ran into the situation where I'd use the web check-in . . .
1K - last updated 2013-01-07 14:43 UTC by 7031
2013-03-27 warning Setting locale failed
I was getting the error from all kinds of Linux programs about "setting locale failed". For example, . . . check that your locale name is correct Thus alternatively, you can fix this with a similar change on . . .
3K - last updated 2014-03-28 13:06 UTC by 7031
2013-04-09 Characterizing the transfer of a voltage biased SQUID
Currently, I'm finishing a software routine to ''characterize the transfer'' (see below) of a voltage . . . is biased with a current. You can view this combination as one "dual-stage SQUID". So what we do, is: . . .
3K - last updated 2013-04-11 12:51 UTC by 7031
2013-04-11 measure the AC gain
= A little intro = Another routine in the system is the [http://en.wikipedia.org/wiki/Alternating_current . . .
3K - last updated 2013-04-26 06:59 UTC by 7031
2013-05-02 Test of current version of SAFARI scripts
Today, we ran a little test of the SAFARI demux/fee-scripts. It's the second time this week, and I'm . . . it's so sensitive to this, we want to eliminate the error signal as much as possible -- thus it's . . .
3K - last updated 2013-06-04 14:13 UTC by 7031
2013-09-28 Criticism of Google Drive
= Update 2013-12-12 = There have been some improvements to [http://googlesystem.blogspot.nl/2013/12/the-new-google-sheets.html . . . formats. But you can't really -- they're not natively editable anymore after exporting. You could . . .
5K - last updated 2013-12-12 11:12 UTC by 7031
2014-05-16 VNC on Debian Wheezy
I recently discovered that VNC on Debian Wheezy is a bit of a mess. VNC can be used in two modes: to . . . provide Debian packages]. Unfortunately, even for the latest version it seems it suffers . . .
3K - last updated 2014-08-26 06:08 UTC by 7031
2014-07-10 Unattended upgrades
I'm not normally prone to linking to stuff, but this is just too good: http://www.howtoforge.com/how-to-configure-automatic-updates-on-debian-wheezy . . .
1K - last updated 2014-07-10 06:07 UTC by 7031
2015-01-16 RestKit Error
Today I got a weird exception in the Xcode console of my iOS project: *** Terminating app due to uncaught . . .
1K - last updated 2015-01-16 08:41 UTC by 7031
2015-02-01 Layout of a tableviewcell depending upon device orientation
Last week, a refresh of the design of my client's app called for a layout that changed depending on the . . . CGSize, withTransitionCoordinator coordinator: UIViewControllerTransitionCoordinator) . . . withTransitionCoordinator: coordinator) self.size = size NSLog("viewWillTransitionToSize . . .
3K - last updated 2015-02-01 11:25 UTC by 7031
2015-05-09 discovering bitrot with MD5
Except for modern filesystems such as ZFS and btrfs, your files aren't protected against so-called "bitrot". . . . -r -l testdirectory > testdirectory.md5deep Explanation: -r means recursive, -l will use relative paths. . . .
3K - last updated 2016-09-11 10:13 UTC by 7031
2015-06-06 Dial down the transmit power of your Airport Express
In my neighborhood, there are about 20 WiFi networks visible when I click the WiFi symbol on my MacBook's . . . If you do, I encourage you to send a small donation to him. Scroll down on that page and click the . . .
1K - last updated 2015-06-06 11:26 UTC by 7031
2015-09-04 View all non-standard kernel extensions on OS X
If you want to list all the drivers (kernel extensions in OS X jargon) that didn't come pre-installed . . . on your keyboard, be sure to check out the donation-supported utilities [https://pqrs.org/osx/karabiner/ . . .
2K - last updated 2015-09-08 05:24 UTC by 7031
2015-11-06 Creating an OS X virtual machine
Automatically creating an OS X virtual machine is getting quite easy and automated nowadays. If you haven't . . . root:xnu-3247.10.11~1/RELEASE_X86_64 x86_64 Alternatively, start VirtualBox, select the VM on the left . . .
2K - last updated 2015-12-08 11:54 UTC by 7031
2016-01-08 BSD dd progress
The commandline utilities that come installed with OS X originate from the BSD world. This means that . . .
2K - last updated 2016-01-08 11:14 UTC by 7031
2016-02-14 Cleaning the Microsoft Sculpt Ergonomic
I've always been a fan of the Microsoft ergonomic keyboards. They offer the best keyboards in the "ergonomic" . . . button. I opened the keyboard but unfortunately it's a [https://en.wikipedia.org/wiki/Keyboard_technology#Scissor-switch_keyboard . . .
4K - last updated 2016-02-18 07:52 UTC by 7031
2016-03-18 Updating Xcode
[http://ericasadun.com/2016/03/22/xcode-upgrades-lessons-learned/ Erica Sadun about updating Xcode]. . . . to update Xcode, and that's what she did. Unfortunately, the download is very big and you don't really . . .
2K - last updated 2016-03-23 07:06 UTC by 7031
2016-04-28 USB speakers
Since ages, I've had these [http://support.logitech.com/en_us/product/v20-notebook-speakers Logitech . . . would ask me where to get these. But unfortunately they long since went out of stock everywhere . . .
2K - last updated 2016-12-07 07:57 UTC by 7031
2016-05-24 home shortcut key for Firefox on OS X
If for some reason you are moving from Safari to Firefox on OS X, you might miss the Cmd-Shift-H shortcut . . . shortcut which I can never remember. An alternative is to press Option-K, Enter. It'll focus on . . .
1K - last updated 2016-11-22 08:30 UTC by 7031
2016-06-12 Veertu the hidden gem
For my last project, I've been using [https://veertu.com/ Veertu]. I consider it the hidden gem of desktop . . . [https://itunes.apple.com/us/app/veertu-native-virtualization/id1024069033?mt=12 through the . . . links: * [https://itunes.apple.com/us/app/veertu-native-virtualization/id1024069033?mt=12 Veertu in . . . Their blog] * [https://news.ycombinator.com/threads?id=veertu Some interesting comments . . .
3K - last updated 2016-06-12 13:46 UTC by 7031
2016-08-11 UIImage nsli superitem
Got this weird error today while futzing around with AutoLayout, or more specifically VFL, Visual Format . . . TestTruckButton[74067:6491323] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', . . . 91 ....... ....... ....... libc++abi.dylib: terminating with uncaught exception of type NSException . . .
2K - last updated 2016-08-11 09:11 UTC by 7031
2016-09-13 weird error when creating constraint in Swift 3
Today, I've transitioned a project to Swift 3 and I bumped into a crash. The crash was as follows: -[_SwiftValue . . . selector sent to instance 0x170249a50 *** Terminating app due to uncaught exception 'NSInvalidArgumentException', . . . 0x10002387c 0x1805305b8) libc++abi.dylib: terminating with uncaught exception of type NSException . . .
2K - last updated 2016-09-14 08:41 UTC by 7031
2016-09-22 Swift 3 naming
Swift 3 is different from version 2 in the naming department. The short version is that the first label . . . is now mandatory, and that the function signature should reflect this. Old: func pageViewsfromContent(content: . . .
1K - last updated 2016-09-22 08:50 UTC by 7031
2016-11-14 Questions when looking for a coworking space
I've heard the figure that every four hours, a new coworking space is created. Personally, I've got a . . . to write down these answers. I've had the unfortunate situation where an office manager would give me . . .
2K - last updated 2016-11-14 11:15 UTC by 7031
2016-12-25 Firefox crashes on late 2016 MacBook Pro
I've been using Firefox on a late 2016 MacBook Pro, running macOS 10.12.2. Every time the laptop wakes . . . callback(eventType) if (eventType == hs.caffeinate.watcher.systemWillSleep) then local firefox = . . . firefox:kill() end elseif (eventType == hs.caffeinate.watcher.systemDidWake) then local firefox = hs.application.find('Firefox') . . . end end end local mywatcher = hs.caffeinate.watcher.new(callback) mywatcher:start() log.i("Started") . . .
2K - last updated 2016-12-25 17:18 UTC by 7031
2017-01-12 Finder shortcuts
I couldn't find a one-page PDF with all macOS Finder shortcut keys. So I made one: [[Finder_shortcuts.pdf]]. . . . Creative Commons Attribution 4.0 International License]. . . .
1K - last updated 2017-01-12 21:05 UTC by 7031
2017-02-21 Linux VPS with TeamViewer
Here are my short notes on creating a Linux VPS (virtual private service) which can be remotely accessed . . . because it works cross-platform and through NAT and firewalls. The big problem is often that a . . . VPSes at Scaleway or DigitalOcean, but the combination of Fedora 25 and [https://www.linode.com Linode] . . .
3K - last updated 2019-12-08 07:25 UTC by 7031
2017-09-17 Replacing NSTimer in Swift 4
For repeated calling of a function, the Timer class is available (used to be called NSTimer). So perhaps . . . <tt>@objc</tt> in my projects. There's an alternative, and that's not to use Timer at all, but instead . . .
2K - last updated 2017-09-17 10:09 UTC by 7031
2019-12-08 Linux VPS with TeamViewer
In 2017, I blogged about [https://www.vankuik.nl/2017-02-21_Linux_VPS_with_TeamViewer setting up a Linux . . . with a Fedora 31 desktop and TeamViewer. Unfortunately, I can no longer get it working; TeamViewer . . .
3K - last updated 2020-02-07 07:57 UTC by 7031
2021-10-20 Generic parameter Destination could not be inferred
Xcode 13.0. If you're banging out SwiftUI code, and you got the following error message: Generic parameter . . . 'Destination' could not be inferred and it'll follow up with . . . 'Text' to expected argument type '() -> Destination' then you probably tried to create a NavigationLink . . . Hashable, selection: Binding<Hashable?>, destination: () -> _, label: () -> _) The solution is to . . . sequence of parameters: NavigationLink(destination: () -> _, tag: Hashable, selection: Binding<Hashable?>, . . .
1K - last updated 2021-10-20 10:53 UTC by 7031
2021-12-02 SwiftUI NavigationLink Extraneous argument label isActive in call
Today, in Xcode 13.1, I got the following error: Extraneous argument label 'isActive:' in call Accompanied . . . { NavigationLink(isActive: self.$navigate, destination: Text("Hello, world!")) { EmptyView() } } } . . . you spot the problem above? I couldn't. An alternative is when you try and specify the label parameter: . . . { NavigationLink(isActive: self.$navigate, destination: Text("Hello, world!"), label: { EmptyView() . . . somewhat more clear: Generic parameter 'Destination' could not be inferred Cannot convert value . . .
1K - last updated 2021-12-02 15:26 UTC by bartvk
2022-11-18 Example of hierarchical list
I actually didn't know that the SwiftUI List element natively supports hierarchical lists, until someone . . . children: nil), ]), Park(name: "Stanislaus National Forest", children: [ Park(name: "Emigrant . . .
1K - last updated 2022-11-18 08:31 UTC by bartvk
2023-02-22 Unselectable picker in SwiftUI
Today I spent too much time looking at a bit of code that wasn't working. Here's the problem: the following . . . id: \.self) { // ... } Alternatively, add a tag. ForEach(self.languages) { Text($0.title) . . .
2K - last updated 2023-11-07 10:19 UTC by bartvk
2023-04-12 Natural breaks in Time Out application for macOS
I'm using a break reminder on macOS, it's called Time Out. https://dejal.com/timeout/ It's a very full-featured . . . them is that it can skip breaks if it detects a natural break. Meaning, if you go and get a cup of . . . Time Out, and in the Advanced screen, changed "Natural break detection method" from "Event Monitor" . . . screen (Advanced), you'll have to adjust the "Natural break active threshold" as well, mine is set . . .
2K - last updated 2023-04-12 09:15 UTC by bartvk
2023-08-30 Coordinator in preview
When you're using the Coordinator pattern in a SwiftUI project, you'll find yourself sometimes wanting . . . quite a bit of work because inside the coordinator, some boilerplate code needs to be present, to . . . UIViewController { private let coordinator: NavigationControllerCoordinator init(coordinator: . . . NavigationControllerCoordinator) { self.coordinator = coordinator super.init(nibName: . . . {_ in navigationController.present(self.coordinator.navigationController, animated: true) self.coordinator.start() . . .
2K - last updated 2023-08-31 11:26 UTC by bartvk
2023-12-01 Unable to use public key authentication for ssh login on Raspberry Pi
TL;DR: Raspberry Pi OS will reject rsa keys, use another type of key, and copy it to the Pi: % ssh-keygen . . . ssh-copy-id .ssh/id_ecdsa.pub <pi-hostname> Explanation is as follows. Recently I installed a Raspberry . . .
2K - last updated 2023-12-01 08:55 UTC by bartvk
A Small Oracle 9i
== HOWTO: A Small 9i Database == This thing is HUUUUUGE... Yeah, it's a big beast. But if you need an . . . the values I used and also shows a short explanation. ||Shared Pool||12 Mb||SQl and PL/SQL needs . . . Before we continue, I'll give a short explanation of each: ; Controlfiles: The database needs . . .
13K - last updated 2005-03-18 22:41 UTC by 7031
Another viewpoint on open source software
The other day I had an interesting conversation with a girl who works at a large multinational bank for . . . that economic progress is made with the combination of capital and labor. However, that didn't really . . . progress than could be explained by the combination of those two. So, economists said that the third . . .
6K - last updated 2005-04-23 20:21 UTC by 7031
Bash
= Online resources = [http://ldp.nl.uu.net/LDP/abs/html/ Advanced Bash-Scripting Guide] = Changing numbering . . . $SSH_CONNECTION" > $LOGFILE fi # Alternative settings SRON0311="172.16.140.14" FROM=`echo . . .
10K - last updated 2012-09-14 07:29 UTC by 7031
CCSDSpacketconcatenation.png
image/png
20K - last updated 2011-12-13 09:54 UTC by 7031
Cheap VPS Hosting
(English readers: this is an overview of cheap Dutch VPS hosters) = Update 23-12-2013 = '''Update:''' . . . het filesystem van de host, enzovoort. Dit is natuurlijk niet gewenst in een hosting situatie en . . .
12K - last updated 2013-12-23 10:48 UTC by 7031
Debian guest on CentOS host
The explanation below details the installation of a Debian guest on a Xen host running the CentOS/Red . . .
4K - last updated 2007-09-21 07:29 UTC by 7031
Downloads
* [[fortune-hitchhiker.deb]] fortune-hitchhiker is a collection of quotes from Douglas Adams' famous . . . Ferengi were a space-faring humanoid species native to the planet Ferenginar. Ferengi civilization . . .
1K - last updated 2009-02-03 11:52 UTC by 7031
Evolutionary Database Design Dutch
== Evolutionair Database Design == Door Martin Fowler en Pramod Sadalage Vertaald naar het Nederlands . . . wordt gekozen voor tussen een te prefereren alternatief. Database design kan ook zo gebeuren. Hieruit . . . van alle database ontwikkelaars == Het is natuurlijk prima dat mensen veranderingen maken en . . .
28K - last updated 2006-03-02 07:19 UTC by 7031
Explanation
I'm glad you enjoy the picture. 1. The woman is my friend and coworker, India Branker. See attached for . . .
1K - last updated 2006-09-14 09:36 UTC by 7031
File Area
[[temp.jpg]] [[digitale_transmissietechniek.doc.zip]] [[boarding.pdf.enc]] [[6x8-IMG_3436c1.jpg]] [[Explanation]] . . .
1K - last updated 2008-06-23 20:45 UTC by 7031
Get QEMU running
To get QEMU running, take the following steps: # Download the [http://cdimage.debian.org/pub/cdimage-testing/sarge_d-i/i386/rc3/sarge-i386-netinst.iso . . . host. I tested the Linux host with nbench. ||''Native Linux nbench results'' || ||Numeric sort || . . .
2K - last updated 2005-05-16 06:31 UTC by 7031
Goodbye daddy
A father put his three year old daughter to bed, told her a story and listened to her prayers which she . . . seemed like the thing to do. It came to me very naturally." The next day grandpa died. The father thought . . .
2K - last updated 2005-10-06 13:16 UTC by 7031
HTML and CSS links
* Free font every month: http://www.freefont.de/us/index.htm * http://www.markschenk.com/webdesign/index.html . . . ExCanvas] A Canvas alternative for IE * [http://www.sovavsiti.cz/css/corners.html . . .
2K - last updated 2007-08-13 09:39 UTC by bvankuik
ImageMagick
ImageMagick is an extremely useful piece of software. There are several interfaces (graphical, commandline . . . = Tiling = I often have a need to concatenate a number of images and create them as one image. . . .
3K - last updated 2025-02-03 19:38 UTC by bartvk
Internationalization
== WARNING WORK IN PROGRESS == == "Geïrriteerd" == Are you a West-European software developer who: # . . .
10K - last updated 2005-12-04 15:35 UTC by 7031
JDeveloper on Linux
Here I'm listing some news, tips, problems and issues I found while running JDeveloper on Linux. For . . . support the mouse wheel. See also here. An alternative is to set the environment variable JDEV_JAVA_HOME . . .
15K - last updated 2006-01-30 14:56 UTC by 7031
JFall 2004 proceedings
Na een lange periode van radiostilte is de Nederlandse Java User Group NL-JUG weer tot leven gebracht. . . . en vervolgens kun je die code deployen. Natuurlijk kun je nog veel verder gaan met AOP dan . . .
11K - last updated 2005-04-15 06:39 UTC by 7031
Java links
* http://www.javapassion.com/ * EJBs: ** http://www.oracle.com/technology/tech/java/oc4j/htdocs/how-to-ejb-local-interfaces.html . . . EJB's 101 damnations] * [http://today.java.net/pub/a/today/2004/10/22/obfuscation.html . . .
1K - last updated 2005-07-15 07:02 UTC by 7031
Law related to IT links
* [http://www.ictrecht.nl/ ICTRecht] Law firm specialized in IT. * [http://www.domjur.nl/ DomJur] Jurisprudence . . . related to domain names. Dutch. * http://www.nationalcredit.nl/ * http://www.webhostingtalk.nl/showthread.php?threadid=57969 . . .
1K - last updated 2005-11-16 08:21 UTC by 7031
Lighting in photography
Some tips about lighting: * Turn off your flashlight, it creates shadows and bland colors. The only way . . . or a simple white cloth or similar. * Use natural (sun)light as much as possible. * Some camera's . . .
1K - last updated 2008-08-11 07:56 UTC by Bart
Linux
= System Administration = [[Remote_dump]] [[MD5sum]] [[Debian]] -- About apt-get, dpkg and other stuff . . . = [[Traffic_shaping]] [[Firewalling]] [[NAT]] [[Traffic_accounting]] [[Virtual_interfaces]] . . .
2K - last updated 2012-09-14 07:24 UTC by 7031
Linux on the Desktop
== Linux on the desktop for an Oracle consultant == Larry painted a powerful present and future for Linux, . . . there is OpenOffice, which provides an alternative for all parts of the MS Office suite, except . . . are slowly beginning to evolve. == Alternatives == Except for the above solutions, the problem . . . $250. There is no comparable open source alternative, except for Bochs and Plex86. The first one . . . is not the problem, there is a second alternative solution and that is remote administration. . . .
6K - last updated 2005-04-19 13:33 UTC by 7031
Makefiles
= General programming information = In this section, we are going to look at the things which make up . . . is called ANSI C, is committed by the American National Standards Institute in standard ANSI X3.159-1989. . . . The International Standardization Organisation has copied that . . . most of the time it's best to use a POSIX alternative. (POSIX stands for Portable Operating System . . .
8K - last updated 2006-01-26 08:56 UTC by 7031
Multiple regression
* A good statistical model is [http://en.wikipedia.org/wiki/Parsimony parsimonious] * We assume that . . . ''r'' also called the ''coefficient of determination '' * ''r squared'' can be anything between 0 . . .
2K - last updated 2009-02-08 14:25 UTC by 7031
Multithreaded programming
= What is a thread? = A process in Unix is actually a running program with an address space. This space . . . (void*)msg); /* wait for reader thread to terminate */ sleep(1); return 0; } void reader_function(char* . . . the following example. For the theoretical explanation, see [http://en.wikipedia.org/wiki/Producers-consumers_problem#Using_semaphores . . . the subject of joinable/detached, see the explanation of pthread_join(). If scheduling is important . . . */ } . . . /* wait for reader thread to terminate */ return 0; } void reader_function(void) { printf("I . . .
9K - last updated 2007-07-11 12:20 UTC by bvankuik
MySQL
= Installation = Install as usual for your distribution. For Debian, this means: $ sudo apt-get install . . . options are available, for example: FIELDS TERMINATED BY ',' ENCLOSED BY '"' LINES TERMINATED BY '\n' . . . the network. Edit the file /etc/my.cnf (or alternatively /etc/mysql/my.cnf) and look for the following . . .
8K - last updated 2023-01-30 09:45 UTC by bartvk
NAT
NAT (network address translation) is also called masquerading under Linux and friends. Here's what you . . . -w net.ipv4.ip_forward=1 $ sudo iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE This assumes, . . .
1K - last updated 2011-11-17 08:13 UTC by 7031
Parsing and transforming RDF files in PLSQL
When you say 'XML', you'd probably also say 'Java' -- until now, because a stock Oracle database installation . . . evangelist'. And of course, a bare bones explanation can be found on http://otn.oracle.com . . .
15K - last updated 2005-03-19 06:57 UTC by 7031
Perl
= Help = Help isn't far away: $ perldoc -f keyword = Parameters = Parameters (other word: arguments) . . . or die "Couldn't close: $!"; == Concatenating == To concatenate, use <tt>push</tt>: @arr1 . . . =~ s/i/a/; print "$bar\n"; Output: jazz An alternative for the above example: $_ = "jizz"; s/i/a/; . . . print STDERR "Test error message\n"; Alternatively, concatenate package, filename or line number . . .
17K - last updated 2015-06-18 09:03 UTC by 7031
Printing to a HP 4000N
By default, the configuration in Red Hat 8 is set so printing to a HP 4000N prints to tray 1; which is . . . this doesn't always seem to work for me. Alternative: when configuring the printer, go to the driver . . .
1K - last updated 2005-03-23 15:28 UTC by 7031
Python presentation
What is Python? * Scripting language, invented in 1991 at CWI (Amsterdam) as a scientific programming . . . available from ActiveState * SciPy/NumPy, a combination of libraries where NumPy takes care of fast . . .
2K - last updated 2008-12-12 09:35 UTC by 7031
Queuing Mechanisms
= Queuing Mechanisms = Even though I read it cover to cover, I regularly reread chapters of [http://www.pragmaticprogrammer.com/ . . . them ahead in the queue. ; Throttling: Alternatively, there could be messages that contain a task . . .
6K - last updated 2014-02-07 13:28 UTC by 7031
Quotes
= Slashdot = So on a scale of usefulness from "necessary for human survival" to "would rather have my . . . it's the implementation of the algorithm..." -- Natasha Smith "I'll let you in on a secret: my pet . . .
6K - last updated 2025-01-20 14:51 UTC by bartvk
RFID
= Spatial data = Voor een breed begrip van RFID kijken we eerst naar spatial data -- locatie-gebonden . . . UMTS. De devices die hiervan gebruik maken, zijn natuurlijk laptops, maar ook smart phones, PDAs en . . . en punten) kan worden opgeslagen in tabellen. Natuurlijk is een database niets waard als hij niet . . .
6K - last updated 2005-09-05 11:07 UTC by 7031
Random C snippets
= Completely read a file = To completely read a file into a string, see below. Warning: uses glibc-specific . . . need a specific byte from that word, use a combination of right-shifting and masking. Or perhaps you . . .
3K - last updated 2011-06-17 12:07 UTC by 7031
Remote dump
Dumping the remote server to a local box that's in a NATted network. From the local box, open a reverse . . .
1K - last updated 2011-06-23 09:13 UTC by 7031
Review Budget Dedicated
= Trial server = BudgetDedicated (hierna: BD) heeft een zogenaamde trial service. Zeer handig om kennis . . . geen Nederlandse bankrekening op. Wel een internationale en daar kun je het Nederlandse nummer uit . . .
3K - last updated 2006-03-09 16:26 UTC by 7031
SSH
= Create a VNC tunnel to work = Suppose your home and organization's network looks like this: +-----Organization-Network-----+ . . . we're coming from, and based on that set alternative settings: # Alternative settings SRON0311="172.16.140.14" . . .
7K - last updated 2008-11-14 09:17 UTC by 7031
Screen
When you're ssh'ing to a specific remote server regularly, [http://www.gnu.org/software/screen/screen.html . . . P to activate the Next or Previous window. Alternatively, type CTRL-A and then 1..5 to immediately . . . someone else is doing. Finally screen can do native logging. I wanted to automattically launch a . . . Wait one second then attempt to reattach any unattached screens. If there are no screens to be attached . . . deflog on Most of this is self explanatory the log file for auto logging and deflog on . . .
7K - last updated 2009-05-26 14:24 UTC by 7031
Shell tricks
= Shared accounts = Sometimes, you have to use shell accounts which are shared with other people. Of . . . your settings here set -o vi ;; esac An alternative without using IP addresses: FROM_IP=$(echo $SSH_CLIENT . . .
2K - last updated 2014-02-12 13:23 UTC by 7031
Signals
= What good is it using signals? = With signals we mean the "software interrupts" that you also send . . . sigaction *act, struct sigaction *oldact); Explanation of the parameters: int signum Of course the . . . siginfo_t *, void *); This is the alternative for the first parameter. Pass a pointer to a . . .
7K - last updated 2007-04-02 12:46 UTC by 7031
Sockets
= Introduction in sockets = For communication over a network, almost every OS provides an API called . . . or INET_DGRAM, as explained above. The combinations of protocol_family and socket type form the . . . manner of communicating. Each combination has a default which almost always should be . . . the server */ /* clear the space where the destination address will be put */ memset((char *)&server_addr,0,sizeof(server_addr)); . . . is very famous for its clear and precise explanation. . . .
11K - last updated 2007-08-13 14:58 UTC by bvankuik
Sockets NL
= Network IPC = Dit stukje probeert duidelijk te maken hoe je programma's over het netwerk kunnen communiceren . . . moet INET_STREAM of INET_DGRAM zijn. De combinatie van protocol_family en socket type vormen de . . . manier van communiceren. Elke combinatie heeft een standaard protocol in huis, dat is . . . 0 (de derde parameter). Als er meerdere alternatieven zijn voor een bepaald protocol, mag je hier . . .
9K - last updated 2006-03-03 21:32 UTC by 7031
Sockets NL NL
Network IPC [ HOME ] Dit stukje probeert duidelijk te maken hoe je programma's over het netwerk kunnen . . . heb, of INET_STREAM of INET_DGRAM zijn. De combinatie van protocol_family en socket type vormen de . . . manier van communiceren. Elke combinatie heeft een standaard protocol in huis, dat is . . . 0 (de derde parameter). Als er meerdere alternatieven zijn voor een bepaald protocol, mag je hier . . . naar een internetdoos Een server connect natuurlijk nergens specifiek heen. Een client wel. . . .
12K - last updated 2006-02-22 09:42 UTC by 7031
Source code version management
= How do I control my source code? = In the past, you may have had the problem that while working on . . . concurrency (working on the same file) is eliminated. Here we will only talk about CVS. This is because . . .
5K - last updated 2006-03-03 21:10 UTC by 7031
System V Semaphores
= Controlling resources with semaphores = == Problem: how can I control access to resources? == Imagine . . . ( key_t key, int nsems, int semflg ); An explanation of the parameters: key_t key The key, a value . . . struct sembuf *sops, unsigned nsops ); An explanation of the parameters: int semid The unique identifier . . . integer sem_op; short integer sem_flg; } Explanation of the parameters: unsighed short integer sem_num; . . .
18K - last updated 2007-08-07 09:20 UTC by bvankuik
System V shared memory
= Problem: how can I share memory between processes? = The fastest way of getting data from process A . . . Segments -------- key shmid owner perms bytes nattch status 0x4306f4ef 131076 telis497 666 95436 . . .
8K - last updated 2009-03-13 12:36 UTC by 7031
The technology behind Jini
= The technology behind Jini = What is Jini its trick? What are the principles behind the interface? . . . a runtime infrastructure, meaning the combination of logical connections and their states between . . .
8K - last updated 2005-10-16 19:05 UTC by 7031
Tracking Issues
Have you ever logged a bug against an (open source) piece of software? Were you happy with the results? . . . is not installed, MS Word tries to find an alternative and fails, showing funny characters like little . . . more pressure to implement operability with the native MS Word format(s). https://bugzilla.mozilla.org/ant.jpg . . . log it in the wrong way. No examples, no explanation, just a basic "it doesn't work". Others go on . . .
5K - last updated 2005-10-11 10:18 UTC by 7031
Traffic shaping
Limiting all outgoing traffic on eth0 is what we want here. Clear any existing traffic shaping on eth0 . . . ffff: Instead of the above source and destination address, it's entirely possible to shape all . . .
2K - last updated 2010-03-30 14:52 UTC by 7031
UML and JDeveloper
''Jethro Wallenburg en Bart van Kuik'' 3 februari 2003 == Introductie == Al een aantal jaren is het ontwikkelen . . . voor modelleertools is, wat de combinatie JDeveloper/UML mag betekenen en tenslotte welke . . .
8K - last updated 2005-03-18 21:13 UTC by 7031
UMTS links
* [http://slashdot.org/comments.pl?sid=50773&cid=5086905 Slashdot Insightful comment about WiFi not squashing . . . Slashdot Layman's explanation of TDM, FDM and CDMA] * [http://denbeste.nu/cdmafaq/index.shtml . . . engineer with lots of FAQs and longer explanations] * [http://www.radio-electronics.com/info/cellulartelecomms/umts/umts_wcdma_tutorial.php . . .
1K - last updated 2005-10-16 16:13 UTC by 7031
UNIX Toolkit
What follows is an explanation of several operating system mechanisms for programmers in the UNIX environment. . . .
1K - last updated 2007-10-11 13:21 UTC by 7031
Using AI for categorization
= AI systems for categorisation = The freeware [[FuzzyCOPE]] application is used to learn how fuzzy rules . . . iris." To make it easy to make such determinations, we must divide the values of the variables . . .
5K - last updated 2006-01-20 11:16 UTC by 7031
Using Screen
= THIS IS AN OLD VERSION = PLEASE CHECK THE MORE RECENT PAGE: [[Screen]]. When you're ssh'ing to a specific . . . P to activate the Next or Previous window. Alternatively, type CTRL-A and then 1..5 to immediately . . . someone else is doing. Finally screen can do native logging. I wanted to automattically launch a . . . Wait one second then attempt to reattach any unattached screens. If there are no screens to be attached . . . deflog on Most of this is self esxplanatory the log file for auto logging and deflog on . . .
6K - last updated 2009-05-20 09:04 UTC by 7031
Vim
[http://www.moolenaar.net/habits.html Tips from Bram], be sure to read them. = Interaction with X = Vim . . . copy the X11 buffer to your OS X clipboard. Alternatively, you can activate X11.app, go to preferences . . .
9K - last updated 2014-12-12 08:11 UTC by 7031
Windows
= Essential software = [[winscp2.exe]] [[putty.exe]] [[pscp.exe]] [http://sourceforge.net/projects/eraser/ . . . PrintFile], win32 alternative to <tt>a2ps</tt> = Using the Taskmanager = [http://slashdot.org/comments.pl?sid=166546&cid=13891046 . . . counted. This causes a large amount of consternation to those who don't understand what is being . . . file allocation, since shared pages by their nature are already backed up on disk elsewhere. Another . . . of Shell from Explorer.exe to cmd.exe. Alternatively, replace it with [http://bb4win.sourceforge.net/bblean/docs/bblean.htm . . .
3K - last updated 2010-02-17 21:00 UTC by 7031
X11
= Running an X11 program on your display under another user = Suppose you're logged in as '''user1''' . . . Caps_Lock = Escape add Lock = Caps_Lock Or alternatively to just use Caps Lock as Escape, on the commandline: . . .
3K - last updated 2014-04-30 13:40 UTC by 7031
Xcode
= Xcode in general = If you get a weird error, first always try to restart Xcode. = Debugging = Some . . . = Sometimes, the debugger will print Terminating app due to uncaught exception And then a couple . . .
3K - last updated 2012-10-02 00:05 UTC by 7031
coreutils
= Counting and averaging = Suppose you have a big log file with lines like: 07-06-2005 13:45:28 - [12013] . . . average speed. Do this with the following combination of ''uniq'' and ''awk'': cat very_big_log | . . . piece and manually copy/paste the lines. Alternatively, if you can reproduce the issue then you can . . .
3K - last updated 2008-11-14 12:32 UTC by 7031
lsusbvv revealed more
The output of lsusb -vv: Bus 002 Device 002: ID 0979:0224 Jeilin Technology Corp., Ltd Device Descriptor: . . . 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 5 bInterfaceClass 0 (Defined . . . 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 1 bNumEndpoints 5 bInterfaceClass 0 (Defined . . . 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 2 bNumEndpoints 5 bInterfaceClass 0 (Defined . . . 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 3 bNumEndpoints 5 bInterfaceClass 0 (Defined . . .
7K - last updated 2005-03-11 23:23 UTC by 7031
macOS
= The Library folder = Since uninstalling Mac apps consists of dragging the .app folder to the trash, . . . If you think of it in advance, here's an alternative: $ cd ~/Library $ find . > ~/before_installation.txt . . .
7K - last updated 2017-06-22 06:24 UTC by 7031
vankuik.nl
= Latest weblog entries = <journal 5> = Weblog Archive = [[Weblog_entries_2024]] [[Weblog_entries_2023]] . . . Presentation on the basics of internationalization of software. Zipped PowerPoint. Check . . . check a half-finished article as well? [[Internationalization]]. * [[Another_viewpoint_on_open_source_software]] . . . (HTML)] * [[UNIX_Toolkit]] -- an explanation of several operating system mechanisms for programmers . . . get deleted. Who knows? Programming: * [[Internationalization]] * [[Start_of_a_project]] * [[Managing_releases]] . . .
4K - last updated 2024-04-16 10:29 UTC by bartvk
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