.Net 4.5 introduced a handy little new method Comparer<T>.Create to aid the creation of bespoke comparers, which is great because it means that you don’t have to define a new Comparer class when it is going to be needed once. In case you’re wondering, it’s still not possible to define anonymous implementation of interfaces in …
LINQ OrderBy – using Comparer<T>.Create and F#’s Object Expressions Read More »
Just a quick note to say that I have updated the JSON serializers benchmark to use the latest Nuget versions of ServiceStack.Text, Json.Net and JsonFX. I have also included the JSON and BSON serializers from the MongoDB C# Driver in the test, and since BSON is a binary format I have included protobuf-net as a …
JSON serializers benchmark updated – including MongoDB Driver Read More »
In general, when you see async void in your code it’s bad news, because: you can’t wait for its completion (as mentioned in this post already) any unhandled exceptions will terminate your process (ouch!) Suppose you have a timer event that fires every once in a while and you want to do some asynchronous …
With the official release of .Net 4.5 and Visual Studio 2012, I suspect many .Net developers will be rushing to rewrite their data access or network layers (amongst many many other things!) to take advantage of the new async-await (see the excellent 101 examples here) language feature in C#, which means you’ll likely be working …
F# – helper functions to convert between Async<unit> and Task Read More »
In F# you can write an extension method like this: Whilst this will work perfectly fine in your F# code, the extension method will not be visible to any C# code using the FileInfo type because F# and C# compiles extension methods differently. To make C#-compatible extension methods in F#, here’s what you need to …
Update 2012/08/23: Thanks for the suggestion from Jizugu in the comments, I’ve updated the post to show you his approach to calling the explicit operator in a clean and elegant way. In C#, you can define an explicit operator for your type using the explicit keyword: You can define an explicit operator like the …
Note: Don’t forget to check out Benchmarks page to see the latest round up of binary and JSON serializers. Following on from my previous test, I have now included JsonFx and as well as the Json.Net BSON serializer in the mix to see how they match up. The results (in milliseconds) as well as the …
To find out if a string contains a piece of substring, here are three simple ways of going about it in C#, just to name a few: String.Contains String.IndexOf where the return value is >= 0 Regex.IsMatch Out of curiosity I wanted to see if there was any noticeable difference in the performance of each …
Performance Test – String.Contains vs String.IndexOf vs Regex.IsMatch Read More »
Note: don’t forget to check out the Benchmarks page to see the latest round up of binary and JSON serializers. Since my last round of benchmarks on binary serializers, there’s a new player in town – MessageShark, which at the time of this writing does not support serialization of fields, but offers comparable speed …
C# By default, arithmetic operations and conversions in C# execute in an unchecked context, you can use the checked keyword to switch a block of code to the checked context so that any arithmetic overflow that occurs in that block of code will cause the OverflowException to be thrown: However, the scope of the checked …
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