Edit (2020/11/23): Thanks to @Kissaki for providing an update on Yarn’s advice in the comments. As of Yarn 2.x, the Yarn team has altered their advice and now suggests installing the tool via npm. This advice centers around the advantages of locking the version of Yarn used on a per-project basis. This allows projects to … Read more
As far as I know, Refresh (along with Set-Cookie and possibly some other proprietary pseudo-headers) were created by Netscape in the very early days of the internet and have been basically (but not quite) standard since then. Because just about every browser supports it, Refresh is pretty safe to use — and commonly is. I … Read more
JMS and Scala actors share a theoretical similarity but don’t think of them as necessarily solving the same problems architecturally. Actors are meant to be a lightweight alternative to shared-memory concurrency where races and deadlocks are generally harder to accidentally create. JMS is a sophisticated API that’s meant to span direct messaging, publish/subscribe, transactions, EJB … Read more
listen_addresses controls which IPs the server will answer on, not which IPs the server will permit connections to authenticate from. It’s entirely reasonable and normal to use listen_addresses ‘*’ so the server will accept incoming connections on any ip assigned to an interface on the postgresql server host, while using pg_hba.conf to control access at … Read more
When you start SSMS, it allows you to choose a Server Type and Server Name. In the server type dropdown, choose “Integration Services” and connect to the server. Then you’ll be able to see what packages are in the db.
finally is executed regardless of whether the statements in the try block fail or succeed. else is executed only if the statements in the try block don’t raise an exception.
Reordering a switch statement does not have any effect. Looking at the Java bytecode spec, a switch can either be compiled to a lookupswitch or a tableswitch instruction, switching on an int. A lookupswitch is always compiled with the possible values in sorted order, so reordering the constants in the code will never matter, and … Read more
Deduction refers to the process of determining the type of a template parameter from a given argument. It applies to function templates, auto, and a few other cases (e.g. partial specialization). For example, consider: template <typename T> void f(std::vector<T>); Now if you say f(x), where you declared std::vector<int> x;, then T is deduced as int, … Read more
It is related to the SOAP version. SOAP 1.2 uses http://www.w3.org/2003/05/soap-envelope for the namespace and SOAP 1.1 uses http://schemas.xmlsoap.org/soap/envelope/. For reference, see http://www.w3.org/TR/soap/ and look at the envelope section in the different version specs. Also, you can browse to each of those envelope URLs and check the version number to see exactly which version of … Read more
Boxing refers to a conversion of a non-nullable-value type into a reference type or the conversion of a value type to some interface that it implements (say int to IComparable<int>). Further, the conversion of an underlying value type to a nullable type is also a boxing conversion. (Caveat: Most discussions of this subject will ignore … Read more