In this post, I will show you how to use the .NET CLI tools on macOS to clean-up installed SDKs, runtimes, workloads, and NuGet caches. 

Entity Framework has a number of ways to optimize your queries. In this post, I explore a number of ways to make your queries a little bit faster. 

In this post I will describe how to get most out of the newest version Entity Framework v 2.2 to support pure domain modeling as much as possible. 

 Its value MUST be a number containing a NumericDate value.

 A JSON numeric value representing the number of seconds from 1970-01-01T00:00:00Z UTC until the specified UTC date/time, ignoring leap seconds. This is equivalent to the IEEE Std 1003.1, 2013 Edition [POSIX.1] definition "Seconds Since the Epoch", in which each day is accounted for by exactly 86400 seconds, other than that non-integer values can be represented. See RFC 3339 [RFC3339] for details regarding date/times in general and UTC in particular.

I have been using Windows operating system from the beginning. When I first started using computer Windows XP was the latest operating system and it was amazing. After few years I started my career as a Java developer and in my office also I have been using Windows only.
 After few years Windows Vista got released and I suffered with it for few months and then Microsoft released Windows 7 which is the best Windows operating system IMO. And then they released Windows 8 which I don’t like much. Recently they released Windows 10 and I have upgraded from Windows 8.1 to Windows 10. Windows 10 is certainly better than Windows 8 but it still sucks compared to Windows 7. 

This project uses mocha, chai, typescript and vs code debug toghether, so you can write your api tests easily. 

This is useful for scenarios when you've some api developed in python for example, but you'd prefer to develop tests in typescript/javascript.

Another use case is when you've some legacy api and you want to develop some tests to make [risk free change] of your legacy api possibel! 

• Calculates asynchronously for better overall performance
• Simple API
• Small. ~5kb
• Use it with any existing Javascript Framework

Work in progress to add support for covariant return types to the .NET runtime. Soon we'll be able to override a virtual method returning `object` with a method returning `string`. Because of how array variance works, weird things might be possible in IL. 

class Base
{
    public virtual IntPtr[] Fun() => null;
}

// This is obvious pseude-code because C# won't let us introduce methods differing
// in return type. C# also requires to be explicit about "virtual" and "override".
// But IL... not so much.
class Derived : Base
{
    // overrides Base.Fun on 32bit platforms.
    public override uint[] Fun() => null;

    // overrides Base.Fun on 64bit platforms.
    public override ulong[] Fun() => null;
}

system design tutorials
7 videos
This series of videos covers of the the most important concepts related to system design, with a focus on practical system design knowledge for interviews. These system design videos cover topics like vertical vs horizontal scaling, load balancers, database design and scaling, caching, back of the envelope math for estimating capacity requirements for a system, an introduction to distributed systems, and some system design interview style questions walking through a full design implementation