Some strange optimization of the C# :D

Sometimes optimization mechanism build in the compilator is able to do some strange things. For example when the following code is concerned we think than reference var1 is not equal the var2 reference.

string var1 = "text";
string var2 = "text";

bool condition = object.ReferenceEquals(var1, var2);

But the optimizer of the C# "thought" that it is not needed to create some new reference on the management heap and it uses the local one.
When we make a little change in the previous code, for example modify the second string by adding the "t" letter at the end of it after its initialization

string var1 = "text";
string var2 = "tex";
var2 += "t";

bool condition = object.ReferenceEquals(var1, var2);

then the references will not be eqal.

This could be a cause of a huge set of problems in the real programming world, so take care about it :)

Nullable values in the C# language

Nullable value = 5;
value = null;
System.Diagnostics.Debug.Assert(value == null);

or

int? value = 5;
value = null;
System.Diagnostics.Debug.Assert(value == null);


Clear and easy, doesn't it? :)

What's new in C# 4.0

Spending time on doing nothing I have found a really god article about some news in the 4-th version of C# which I would like to present in this post. Especially I have ben interested in one construction in particular which allows the programmer invoking some method for the all elements of a collection in the pararell way. It looks like the following one:

string []tab=new string[]{"a","b","c","d","e"};
System.Threading.Tasks.Parallel.ForEach(tab, Method);

where

private static void Method(string val)
{
}

Programmers' everydays life :)

Test Driven Development

Hipersześcian... and no comments are needed :)

A cała zabawa zainspirowana została przez tą stronkę. :)

Disk docking damages your HD!!!

99_chron_dysk.sh

#!/bin/sh
hdparm -B 255 /dev/sda

How to split a large mp3 file into some smaller?

Sometimes I come across the issue that I want to listen to some mp3s on my mobile phone but the file is larger than the storage size on my cell. I 'googled' and I found mp3splt application. It's really easy in use and makes your like much better than it used to be:)

For example if you want to split some file into 10 others you should simply type the following code in your shell window and voila

mp3splt -t 10.00 zaga.mp3