Ruby Ternary Search Tree

Simple Ruby Ternary Search Tree Implementation.

Currently supports:

• Insertion (insert)


• Search (search, node)


• Printing (to_s)

git clone at: http://github.com/giancarlo/algorithms.git

Ruby 1.9 C Api Extensions Guide

I am writing a guide on the Ruby (SVN) C API. You can see it here: http://coaxialhost.com/tutorials/writing_ruby_extensions.html.

Expect more stuff to be added later.

New Mirror Blog and Theme

I have created a wordpress blog in my own server which will eventually replace this site. The blog is at http://cpb.coaxialhost.com.

This new blog has a better format and will implement new features in the future.

Embed Fonts in HTML document using PHP and Javascript

I wrote a php + js script to replace HTML markup with formatted text in the form of images. The script is called PHPJSFont and it is available at http://code.google.com/p/phpjsfont.

What it does is simple: the Javascript code replaces the text inside HTML tags with an image generated by the PHP script.

Currently it depends on JQuery and PHP 4+ compiled with the GD extension and TTF support.

It should be fairly simple to use, as in:


PJF.replace("h2");
PJF.replace("#topmenu UL > LI");
PJF.replace("h1", { size: 20, color: [255, 0, 0] });


Install Intel Compiler(icc) in Ubuntu 8.10

To install icc in Ubuntu:

1. Download icc from Intel website


2. tar -zxvf the file.


3. Run 'install.sh'.


4. Follow the installer instructions.


5. When it is done add this line to your ~/.bashrc (or initialization script):
   source /opt/intel/Compiler/11.0/069/bin/iccvars.sh ia32
   Replace ia32 with your platform: (ia32, intel64, ia64)


6. Log off and log in and that is it. You can test it with icc -v


7. To use icc with a configure script use ./configure CC=icc

NOTE: If you get a libimf.so error like "file does not exists" while using sudo, you will need to write a bash script adding "source /opt/intel/Compiler/11.0/069/bin/iccvars.sh" and the program you are trying to run.

Ruby 1.9 Blocks Notes

• Every function can accept a block.


• Kernel.block_given? will tell you if a block was passed.



def test
  a = 42
  yield(a) if block_given?
end



• To assign the block to an argument, you add an ampersand (&) in front of the last argument of your function. This will affect performance.


• You can call the block inside the function using yield or Proc.call like this:



def test(&block)
  a = 42
  yield(a) # or block.call(a,b)
end



• yield calls and passes the arguments to the block.


• block.arity will tell you the number of arguments a block can accept


• If you have a recursive function accepting a block, you can pass the block to it using '&'.



def recursive_function(&block)
  # Do stuff
  recursive_function(&block)
  # pass to other functions accepting blocks
  10.times &block # will run block 10 times
end



• If you use the return keyword inside a block, it will return the value and exit the function binded to the block, which is the one that created it.



def bl(&block)
  yield
end

def test
  bl { return }
  puts "Hello" # this will not be executed.
end



• You can use break to return a value inside a block and stop iterating.



def bl(&block)
  (0..10).each &block 
end

def test
  # This block will stop iterating at 5 and return true.
  bl { |x| (break true) if (x == 5); false }
end

Using SyntaxHighlighter with Blogger or Blogspot

I added Syntax Highlighting capabilities to this blog and here it is how i did it. You might need another server where to put your files:

1. Download SyntaxHighlighter from http://code.google.com/p/syntaxhighlighter/downloads/list.


2. Add this to your Edit HTML code in Layout:



<script language='javascript' src='http://www.url.com/Scripts/shCore.js'></script>
<script language='javascript'>
 window.onload = function() {
 dp.SyntaxHighlighter.ClipboardSwf = 'http://www.url.com/Scripts/clipboard.swf';
 dp.SyntaxHighlighter.BloggerMode();
 dp.SyntaxHighlighter.HighlightAll('code');
 }
</script>
<link href='http://www.url.com/Styles/SyntaxHighlighter.css' rel='stylesheet' type='text/css'/>



3. Put the code you want to highlight inside a <pre> tag like this:



<pre name='code' class='language'>
 code;
</pre>



4. Make sure you replace the url and also '<' with &lt; if you are using HTML code


5. Add this to the top of your post:



<script language='javascript' src='http://www.url.com/Scripts/shBrushXml.js'></script>



6. Replace the script name with the one used for your language.

For more information and language list visit http://code.google.com/p/syntaxhighlighter/w/list.