Jaa

True object oriented language

  • Artikkeli

 

DSCF2530

Today I was spreading the goodness of Ruby and why I love it so much (and you can expect multiple posts on it). SmallTalk programmers can sneer at me, but hey I wasn't even born when SmallTalk came into being and hence I can be pardoned for pretending that Ruby invented this :)

Languages like Ruby are "truly" object oriented. So even a number like 2 is an instance of the FixNum class. So the following is valid Ruby code which returns the absolute value of the number.

 -12345.abs

Taking this to an extreme is the iteration syntax. In C# to write something in a loop "n" time I'd be needed to get into for/foreach syntax, however in Ruby I can do the following

 5.times { puts "Hello"}

Which prints Hello 5 times.

However, I actually lied about having to use for/foreach statement in C#. With the new extension-method/lambda goodness we can very well achieve something close in C#.

For that first we create the following extension method

 public static class Extensions
{
    public static void times(this int n, Action a)
    {
        for (int i = 0; i < n; i++)
        {
            a();
        }
    }
}

Then we can call "times" on an int as easily (well almost as I still need some lambda ugliness).

 5.times(() => Console.WriteLine("Hello"));
// Or 
6.times(delegate { Console.WriteLine("Hello"); });

Cross Poster here

Comments