specifications

This one's really an offshoot of this question , but I think it deserves its own answer. According to section 15.13 of the ECMA-334 (on the using statement, below referred to as resource-acquisition ): Local variables declared in a resource-acquisition are read-only, and shall include an initializer. A compile-time error occurs if the embedded statement attempts to modify these local variables (via assignment or the ++ and -- operators) or pass them as ref or out parameters. This seems to explain why the code below is illegal. struct Mutable : IDisposable { public int Field; public void

Does anyone know if there is a version of the Java 10 and JVM 10 specifications with diffs from the previous version available? For Java 8 and Java 9, there were specifications with diffs, and it's very difficult to see what exactly changed otherwise. For differences between Java 9 and Java 10 (18.3), you can download " JSR-000383 Java SE 10 (18.3) Final Release Annex 3 for Evaluation " with the following link: http://download.oracle.com/otndocs/jcp/java_se-10-final-eval-spec/index.html Keep in mind, you must accept the Software License Agreement to download it. This archive contains the

The ECMAScript specification defines the Atomics object in the section 24.4 . Among all the global objects this is the more obscure for me since I didn't know about its existence until I didn't read its specification, and also Google hasn't many references to it (or maybe the name is too much generic and everything gets submerged?). According its official definition The Atomics object provides functions that operate indivisibly (atomically) on shared memory array cells as well as functions that let agents wait for and dispatch primitive events So it has the shape of an object with a number of

Probably the following cannot be done (I am getting a compilation error: "The inherited method A.doSomthing(int) cannot hide the public abstract method in B"): public class A { int doSomthing(int x) { return x; } } public interface B { int doSomthing(int x); } public class C extends A implements B { //trying to override doSomthing... int doSomthing(int x) { return doSomthingElse(x); } } Assuming I am allowed to change neither A nor B, my question is can I somehow define C in such a way that it will inherit from both A and B (suppose that it is required for some framework that C will be both an

I get it on some level, but I have yet to see an example that didn't bring up more questions than answers. http://rhnh.net/2011/01/31/yaml-tutorial # Set.new([1,2]).to_yaml --- !ruby/object:Set hash: 1: true 2: true I get that we're declaring a Set tag. I don't get what the subsequent hash mapping has to do with it. Are we declaring a schema? Can someone show me an example with multiple tag declarations? I've read through the spec: http://yaml.org/spec/1.2/spec.html#id2761292 %TAG ! tag:clarkevans.com,2002: Is this declaring a schema? Is there something else a parser has to do in order to

On the http://php.net/manual/en/language.operators.precedence.php webpage, the second highest precedence level contains a left-associative operator called [ . I don't understand that. Is it the [ used to access/modify array entries, as in $myArray[23] ? I cannot imagine any code snippet where we would need to know the "precedence" of it wrt other operators, or where the "associativity" of [ would be useful. This is a very valid question. 1. Precedence in between [...] First there is never an ambiguity to what PHP should evaluate first when looking at the right side of the [ , since the bracket