There are a lot of introduction-like posts about starting your journey with HTML5 geolocation, so I don’t intend to write another one. Instead, I’m going to say a few words about enabling and disabling in-browser geolocation services, because this topic has some glitches that may not be know by everyone.
Read More “Enabling, checking and disabling HTML5 geolocation”
I’ve searched the web for a Javascipt obsfucator for my specific needs — actually a minifier and obsfucator that will minify a code (pretty like BrainJar do) and obsfucate all variables, function names etc. to 1-2 character length (shortest possible). I know that this could be less secure, but due to purpose (internal project), size of the code, not security, is a key here. I also need it as one-click, on-line ready tool.
Since my searches failed, I’ve asked a question on Stack Overflow, but it was closed as off-topic.
Following article is a summary of answers already given on Stack Overflow (before question was closed) plus my some other thoughts and findings.
Read More “A good on-line JS obsfucator for minifying purposes only [updated]”
There is a nifty trick, that allows you to change look&feel of your website and even hide certain elements on it, in case user has disabled Javascript in his or her browser.
Facebook is not working, when Javascript is disabled and world collapses, when Facebook is not working, thus no one serious is disabling Javascript nowadays.
Yet, I still think that a good web developer should be prepared for everything. Even for JS turned off…
Read More “Changing look of website, if Javascript is disabled”KhanAcademy showed an example Javascript code on how to write a full-featured space-shooter written in just 1500 lines of code (20k of pure Javascript code after minification).
No matter, whether you are a JS-minification freak or just want to introduce some space shooter on your website to enjoy your visitors — this is certainly worth seeing. Of course, KhanAcademy offers a lot of more nifty Javascript examples.
Ever heard about Brainfuck? It is an esoteric programming language? Designed with only one purpose — to test the boundaries of computer programming… and human brain. It uses only eight single characters ([, ], <, >, +, -, . and ,) as entire set of programming words. Yes, it really fucks your brain!
To mine extreme surprise with proper tools you can turn regular Javascript into very similar brainfucking experience!
Read More “Non-alphanumeric Javascript?”Samsung Galaxy Nexus phone and Samsung Galaxy Nexus 7 tablet, as good as probably all other devices with Android 4.0 or higher on-board, are missing USB Mass Storage mode, which allowed you (under older Android) to use your mobile device as external hard drive and copy files directly via Windows Explorer.
Here you’ll find some alternatives to transfer files from Android 4.0-based device.
Read More “Transfering files from Galaxy Nexus or other device with Android 4.0”
To access your Asmax AR1004g router remotely (i.e. from WAN / Internet side, not from your local network), you have to remember about two things. Because I nearly always forget about one of these things (or about both in the same time), I wrote this simple memo-post as a reminder to myself.
In this post you may also learn how stupid are Asmax engineers and designers.
Once upon a time I read (tried to read) a book about on-line marketing. It was authored by Caroline or Catherine Seda, if I’m not mistaken. It was so complete disaster, that I left this book in the train, where I was reading it. Out of nearly two hundreds pages (or something around this) I was able to write-down only thirteen or so interesting ideas. Rest was a total blah-blah and a complete waste of my time.
I present these ideas here, supported a bit by my own thoughts. I divided them into two groups — one group of tips and tricks to be used on your everyday journey through Internet and the other one to be considered when building your website.
This is general post about Xexun TK102 GPS tracker and many of its clones. You’ll find here a bunch of useful information, including some tech specs, list of differences between original tracker and clones and some more.
We’re talking about “Xexun TK102 Tracker” here. The original one, because there are many clones under other companies from China, selling similar hardware, with the same cover and logo, but with:
“Coban” / “Kintech” are just two of many clones sold on eBay etc., claiming to be original “Xexun” trackers.
On the other hand, original “Xexun” and some clones (like “Coban” for example) are harder to control from own script, because they require a correct answer from the server, where data is sent over GPRS. If unit does not receive such reply, it breaks connection. The cheapest unit does not have this checking and will always sent location data to specified IP address over provided port.
Here is product description of original “Xexun” localizer (and here is a clone under “Kintech” name).
Possible buyer must be very careful (and should secure return policy, for which buying directly in China is not recommended) as there are many reports about sellers claiming to sell original “Xexun” device and sending a clone actually.
Though this device is five years old, it is still sold at many places (including eBay), but even at theses sources it is very hard to get anything worth for developers, except some simple, very basic user guide.
I have confirmed information (from two different sources) that there is no official API available for this device. The only option is to Google around, ask other users or use forums (see below).
If you own original “Xexun” localizer, you may try to contact company international departament and ask their technicians to include some changes to device source code and to send you updated firmware, with your changes – wow! That was confirmed by company itself.
I found a perfect forum for TK102 device, with a lot of questions and answers:
There are many other devices dissussed and in general, this is the biggest forum in the world, with topics for localizers and similar information.
In general, any TK102 related devices is opening a socket for a direct TCP transmission (original one can be switched to use UDP protocol). Data is being transmitted over port specified by user, in configuration and using GPRS only (requires SIM card with enabled GPRS, there is no way to use WiFi).
Sending frequency, format and amount of data being send, entirely depends on kind of device is being used — it is more extensive and more configurable in original one than in clones.
Take into consideration, that many TK102 clones requires a correct response from the server after each data, it send. It breaks connection after sending some welcome garbage UDP packet, as it does not receive response, it waits for.
It is quite hard (quite impossible?) to find any guide to many of these clones, on what kind of responses server should sent. This often leads into situation of developer being unable to establish two-way communication between server and localizer. Many localizers are sold to be used only via SMS communication or throughs paid services that had signed and agreement with producer and received protocol specification that contains valid responses server should generate for particular TK102 clone.
Double check, if this is not source of problem, if you can’t communicate with your localizer from your app.
This is all the information, I managed to get up until now. I don’t found any API for this tracker so far. I found some technical documentation, but it did not helped me much in the area of programming this device on server-side. If you need more information, look around this blog or make Google your friend.
Jacascript debugging consoles are build-in to all web browsers. Either as core solution, some dev tools or available as plugins. If you don’t like them or want to use them, you can consider a pretty piece code, to dump any Javascript variable, that I found at openjs.com website.
Read More “Javascript dumping function”On some website around ASUS, I have found a HTML code for building complete user country selection dropdown, which includes every country name written in both English and local name. All local names are encoded in UTF-8 (if not in UTF-16; I’m not sure) so for all countries that uses non-Latin alphabet everything should be fine.
Read More “Country select with English and local country names”
Checking size for inline scripts is as easy as document.getElementsByTagName('script')[0].text.length (solution taken from here). But, when it comes to measuring size of remote resources things gets a little bit complicated. Mostly due to cross-site restrictions and reducing unnecessary server load. Head-type of AJAX call, not so famous among developers, may help in this case.
Read More “Using AJAX head-type requests to check size of remote scripts”
brainjar.com’ scrunchinator is a Javascript code minifier, that I use most often.
As for reversing this process, you can use JS Beautifier or — if you’re an extension maniac — a Pretty Beautiful Javascript extension for Chrome (at GitHub you’ll find sources) and for Firefox.
Below JS Beautifier’s main window, you’ll find more useful links to tools like above.
You can find a lot of free hostings for PHP and MySQL, but not that much for ASP and MS Access. In addition to being free, these hostings also offer absolutely not ads, neither on your websites nor in sent e-mails:
100 MB might seem to be very low among nowadays offers (counted in GB or even not limited in space). But since you get: ASP Support, MS Access database and ISS 6 (on Windows 2003), absolutely free for lifetime with 100% no ads, then I think it would be hard to find similar offer with higher storage.
Here is a function that should work in virtually every browser, even really old ones. Of course, it is only useful, if you don’t use jQuery. Because, if you do, a far better way is to just call .on() or .bind() or .delegate() or .live() or whatever you want, and let jQuery do all the dirty work.
Read More “Cross-browser function for adding an event listener”
This is a very short brief on how to properly setup NAT functions on ASMAX AR1004g router, i.e. how to route all (or part of) incoming traffic to a specific machine in your local network. In this text, I assume that your router is available under 192.168.1.1 static IP address in your local network and you want to route all traffic using FTP protocol to your video-player, available under 192.168.1.3 and all traffic using HTTP to another computer, that is accessible under 192.168.1.4 static IP address in your local network. Adjust this assumption to your actual situation. Read More “Configuring NAT, DMZ or Virtual Servers on ASMAX AR1004g”
Javascript does not have (by default) any counting and clearing methods for associative arrays (based on JS object). This article shows probably the quickest way to add a little bit more functionality to Javascript arrays. The same, as can be found in other programming languages.
Read More “Associative arrays with count() and clear() methods. The quickest solution”
To all those, who just don’t get it!
Never, ever forget about these five, if you’re developing anything.
I was searching for good looking (nice graphic) and fine organized (modern structure) company organization chart. I found one at ygraph.com and wanted to share some thoughts on this topic.
I don’t know how common it is, but common or not, it’s still a bad idea — I found a great article at Programmers Stack Exchange about copying code, you wrote for your old employer, when leaving him for a new job. I found arguments given in this article so enlightening, that I actually decided to… copy them to my blog. So, here it is.
Some guy on Stack Overflow wanted to know how to highlight a piece of text in given page using jQuery. Finding proper solution for jQuery (client-side) took me around ten seconds as three most important search results were found on StackExchange and jQuery documentation itself. Anyway, here’s a copy of my answer.
Long long time ago in a galaxy far far away I wrote a very simple PHP script, that I usually put into index.php of a directory, which contents I’d like to print out to the browser. I’m using this solutions on all servers and hostings which has Apache-based directory listings disabled and thus are showing empty page or error screen, if folder does not contain index.php.
Here’s the code:
[code language=”php”]
$dir = getcwd();
if (is_dir($dir))
{
if ($dh = opendir($dir))
{
echo(‘Files in this folder:<ul>’);
while (($file = readdir($dh)) !== false)
{
if ($file != ‘.’ && $file != ‘..’ && $file != ‘index.php’)
{
echo(‘<li><a href="’.$file.’">’.$file.'</a></li>’);
}
}
closedir($dh);
echo(”);
}
}
[/code]
That’s pretty much everything, folks!
Ignoring folders using TortoiseSVN is a rather delicate thing. You must consider many factors, such as: whether file is or isn’t already versioned, whether file is needed for running application (i.e. file is junk or differs per computer and you don’t want to put it into repository, but must exist in local folder) etc.
I was once asked, if it would be possible to do step-by-step conversion of a large project written in pure PHP into Yii. In my opinion, it is possible, but absolutely not worth it.
Most professional frameworks are complete opposite to “pure PHP” code in actually all areas. Code is separated most times (i.e. into model, view and controller in MVC design pattern) and uses mostly framework classes or code. I would even say, that writing an application in some framework means using only 10-20% of pure PHP code and doing rest purely on framework classes, extensions, controllers etc.
In other words: porting a “pure PHP” application into framework code would mean writing that application from scratch. I’m not sure, if you would be able to reuse more than 5% of your original source code?
This article is based on information provided by QPKG package created for SVN by noski and on QNAP Wiki article about SVN and of course a piece of my experience. But since SVN is relatively easily to install by-hand (so you don’t actually need QPKG package) and since Wiki article about SVN is outdated / contains some garbage (directory /share does note belong to /dev/ram!), I decided to write my own guide.