Working for about 4-5 years with software/firmware development and environment testing of miniaturized satellites*, I would like to share my experience here. *(miniaturized satellites are a lot more prone to single event upsets than bigger satellites due to its relatively small, limited sizes for its electronic components) To be very concise and direct: there is … Read more
It seems you (and/or your company) have a fundamental misunderstanding of what a family tree is supposed to be. Let me clarify, I also work for a company that has (as one of its products) a family tree in its portfolio, and we have been struggling with similar problems. The problem, in our case, and … Read more
One of the Roslyn engineers who specializes in understanding optimization of stack usage took a look at this and reports to me that there seems to be a problem in the interaction between the way the C# compiler generates local variable stores and the way the JIT compiler does register scheduling in the corresponding x86 … Read more
Apart from the apparent difference of having to declare the value at the time of a definition for a const VS readonly values can be computed dynamically but need to be assigned before the constructor exits.. after that it is frozen. const‘s are implicitly static. You use a ClassName.ConstantName notation to access them. There is … Read more
Yes, it is important if your item will be used as a key in a dictionary, or HashSet<T>, etc – since this is used (in the absence of a custom IEqualityComparer<T>) to group items into buckets. If the hash-code for two items does not match, they may never be considered equal (Equals will simply never … Read more
Jeff, your code is nice but could be clearer with constants (as suggested in Code Complete). const int SECOND = 1; const int MINUTE = 60 * SECOND; const int HOUR = 60 * MINUTE; const int DAY = 24 * HOUR; const int MONTH = 30 * DAY; var ts = new TimeSpan(DateTime.UtcNow.Ticks – … Read more
Welcome to the world of denormalized floating-point! They can wreak havoc on performance!!! Denormal (or subnormal) numbers are kind of a hack to get some extra values very close to zero out of the floating point representation. Operations on denormalized floating-point can be tens to hundreds of times slower than on normalized floating-point. This is … Read more
There are some good answers here. I would add to them the following points. What is the correct C# way of representing a data structure, which, “logically” (that is to say, “to the human mind”) is just a list of things with a few bells and whistles? Ask any ten non-computer-programmer people who are familiar … Read more
The [Flags] attribute should be used whenever the enumerable represents a collection of possible values, rather than a single value. Such collections are often used with bitwise operators, for example: var allowedColors = MyColor.Red | MyColor.Green | MyColor.Blue; Note that the [Flags] attribute doesn’t enable this by itself – all it does is allow a … Read more