In my previous post, I mentioned about NVidia and xcompmgr, it is not true reason that causes the Chrome not updating the display.

The root cause is partially found. The issue is caused by the optimus laptop (dual graphic card, NVidia with Intel). In unknown conditions, resume from hibernation will cause the Intel graphic card doesn’t work properly. This can be checked by running “glxgears” after resume. You will see the OpenGL fails to refresh on the display.

I was switching from Chromium to Firefox as my primary web browser recently. Then, I switched back to Chromium again.

Chrome was usually claimed that it consumes a lot of memory. And recent Firefox updates claim that it is faster and consumes less memory. That is why, I switched to Firefox. I agree that, it is much faster than before. However…

I faced a critical issue. One less important issue that I would like to mention is, Firefox does not support Google Hangout.

I have a Dell Vostro 5459 with Arch Linux. Previously, whenever I do a hibernation, and resume will produce a black screen, which I can do nothing.

Then I believed that one of the NVidia updates fixed this issue.

However, very soon later, I faced another issue is, resuming from hibernation causes Chromium with freeze content, or the content doesn’t redraw. This not only happen to Chromium, but also Opera and SMPlayer. I thought it is caused by NVidia. Tried a lot of solution, search nothing from Internet. I also installed “bbswitch”, nothing solved.

When we are developing a solution or a system, we are prone to choose a simple solution. Because simple solution is just better than complex solution. However, most of the time, we choose a simple solution inappropriately, and this causes more troubles gradually when the system is growing.

The complexity of a solution, should depend on the complexity of the problem itself, not the other way round. For example, we cannot create an operating system with a single line of programming statement. We also cannot create an operating system with just a single source file. Because an operating system is very complex (managing devices, memory, process, etc), no simple solution can fulfil the requirements.

Recently updating my hobby project Med, memory editor for Linux, still under heavy development with various bugs.

In this project, I use several C++1x features (compiled with C++14 standard). Most recent notable feature is multi-threading scanning. In memory scanning, scan through the accessible memory blocks sequentially is slow. Therefore, I need to scan the memory blocks in parallel. To implement this, I have to create multiple threads to scan through the memory blocks.

Mr Torvalds created two amazing things: Linux and Git. Former is an OS kernel; latter is a version control system. Unluckily, none is prevailing in Malaysia.

When I was a lecturer, creating a new programme with various courses is truly exhaustive. The worst case is recording the changes of the documents for the government agency’s accreditation. If you are systematic, you will backup the files. But backing up the files does not tell you what are the changes you had made. Unless you create another note for each changes you made. But that will be double works. If you say you can use Microsoft Word’s feature to compare the documents and see the changes, it is totally impractical if the two documents are big and there have a vast changes.

PHP was a great programming language in web development. It surpasses the VBscript for ASP and Perl for CGI. It is favoured because of the syntax based C and C++. It supports procedural programming paradigm and object-oriented paradigm. A lot of functions resemble C functions such as printf, fprintf, sprintf, fopen, etc. Similarly, it can work directly to the C library such as expat, zlib, libxml2, etc. A lot of great content management systems (CMS) are written in PHP, such as Drupal, Wordpress, Joomla, etc.

In JavaScript, we can create closure like this,

[code language=“javascript”] var foo = (() => { let x = 0; return () => { return x++; } })();

for (var i = 0; i < 10; i++) { var x = foo(); console.log(x); } [/code]

But translating above code into C++, it cannot work as expected for the variable, unless the variable is outside the lambda function.

[code language=“cpp”] // In a function int x; // variable here auto foo = [&x]() { x = 0; return [&x]() { return x++; }; }(); for (int i = 0; i < 10; i++) { int x = foo(); cout « x « endl; } [/code]

My first open source project, Prayer Clock, I moved from SourceForge to GitHub recently. Yeah! Everyone should git!!!

And today I just made some changes, and updated to GTK3.

[gallery ids=“1757,1758” type=“rectangular”]

With GTK 3, I removed the title bar. But not yet successfully moving the menu bar to the icon like Evince or Nautilus.

I plan to convert the right hand panel to WebKitGtk. But this will not be the priority yet.

Just revived my old script into a project in GitHub, csv_to_something. An old simple script that was created to manage some student data. Because the students data were collected through Google Forms, so I convert it to CSV, then from CSV to SQLite. So that I can use the SQL to query whatever data I need.

Using SQLite software such as sqliteman and sqlitebrowser, I can create any new table, grouping, sorting etc.