Of course, you know the rule, don’t you. If you want to define your own value types in .NET, make sure they are immutable. Don’t create mutable value types!
Unfortunately, today, I forgot that rule. And I paid the price in a couple of hours needless debugging. Continue reading “Mutable Structs are Evil. Yes. Really.”
In my last article I pointed out that Microsoft has given us no less than nine different general-purpose interfaces to perform the simple task of comparing objects to see if they are equal, or if one is greater than the other.
And I ended with a quick quiz. Could you identify those nine interfaces?
Continue reading “IEquatable and All That: The Nine Comparisons Interfaces”
My new Pluralsight course, C# Equality and Comparisons, has been published this week, bringing my total to 3 courses with the two existing courses. Math for Programmers and C# Collections Fundamentals.
C# Equality and Comparisons was largely spawned out of the earlier C# Collections course: Back in February this year, I was writing samples for that course to demonstrate making dictionaries case-insensitive. The easiest way to do that is to supply a case-insensitive equality comparer to the dictionary constructor, like this: Continue reading “C# Equality and Comparisons Published”
I’m sure most of us have been there. You have some small data type to declare, which only really contains a couple of primitives and is clearly most appropriate to exist as a struct. You put a couple of values in it, and because you’re doing this quickly and you want your code to be simple, you use auto properties. For this kind of struct there’s (hopefully) no reason not to.
And in the best traditions of those cookery programmes you see on tv, here’s one that I prepared earlier: Continue reading “AutoProperties, Structs and Constructors (C# Wishes Part 3)”
I’ve been talking on this blog talking about things I’d love to see added to C# – things that I think would give a significant improvement in the language. And my 2nd item is a very simple one: Allow read-only auto-properties.
Let’s look at the problem first. Continue reading “ReadOnly Auto-Properties (C# Wishes Part 2)”
Well Christmas, that traditional time for giving has just gone past. However the TechieSimon blog has nothing to give, apart from strange blog posts. So I thought I’d be cheeky instead. To somewhat belatedly celebrate the time of giving I’m going to do some (metaphorical) asking: For the next few blog posts I’ll talk about some of the things that I’d love Microsoft to add to the C# Language.
My first wish is for a nullable dot operator. Continue reading “The Nullable Dot (Post-Xmas C# Wishes, Part 1)”
Last time I asked you what the output would be from this code….
double zero = 0;
double minus = -1.0e-400;
double big = 1.0 / zero;
double minusBig = 1.0 / minus;
Console.WriteLine(zero == minus);
Console.WriteLine(big == minusBig);
catch (Exception ex)
Continue reading “Zero Equals What???”
Yay! My Pluralsight course on Math for Programmers has just been published.
To quote Pluralsight’s write up on their blog…
Continue reading “Math for Programmers Published!”