For a while now I’ve been wondering why C#’s support for covariance does not cover value types, both in normal array covariance and covariance in the generic parameter introduced in C# 4: 1: void Main() 2: { 3: int i = 0; 4: string str = "hello world"; 5: 6: TestMethod(i); // legal 7: TestMethod(str); …
The other day I had an interesting observation on the optional parameters in C# 4, whereby if you specify a parameter as optional on an interface you don’t actually have to make that parameter optional on any implementing class: 1: public interface MyInterface 2: { 3: void TestMethod(bool flag=false); 4: } 5: 6: public class …
Interesting observation on C# 4’s optional parameter Read More »
As great as LINQ is and how it has transformed the way we interact with data in .Net to the point many of us wonder how we had managed without it all this time! There are however, some pitfalls one can fall into, especially with the concept of delayed execution which is easily the most …
I saw this tutorial the other day, it’s cool but I fancied taking it a step further and make it useful as an app rather than just a fancy way to show some structured data on the screen. Here’s a list of the features which I wanted to add: being able to edit the title …
Creating a sticky note app with HTML5, CSS3 and Javascript Read More »
If you’ve been using S3 client in the AWS SDK for .Net you might have noticed that there are no methods that let you interact with the folders in a bucket. As it turns out, S3 does not support folders in the conventional sense*, everything is still a key value pair, but tools such as …
In part 4, I put together the foundations for a mini shooting game, with targets moving on the screen and you can ‘hit’ them by clicking inside the targets, etc. etc. I promised an update to make it feel more like a game, so here it is! Adding a background The black background was more …
Following on from part 3 where we basically made a little app that lets you scribble with HTML5’s canvas element, let us push on and see what else we can achieve with the canvas element. The logical next step would be to made animations, and give you a way to interact with the animation. So …
Time really does fly when you’re having fun! In a blink of the eye it’s been a whole year since I left Credit Suisse to start a career making social games with IwI. All and all, it’s been a year filled with lots of hard work, lots of learning and honestly, a hell of a …
Java vs C# As Jon Skeet pointed out in this excellent article on closures, the strategies of capturing the execution context which the behaviour is bound to different between Java and C#. C# captures the variable itself, whereas Java captures the value of the variable. To illustrate the difference, here’s Jon’s original example in C#: …
In my last post I explained the difference between the techniques of Currying and Partial Application, following on where there let me show you how you might apply these two techniques in F#, Javascript and C#. F# Starting with F#, being a functional language it makes currying and partial application dead easy (considering that they …
Currying and Partial Applications in F#, Javascript and C# Read More »
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