specifications

问题 Does anyone happen to know what the maximum length of a method name is in your programming language of choice? I was going to make this a C# specific question, but I think it would be nice to know across the spectrum. What are the factors involved as well: Does the language specification limit this? What does the compiler limit it to? Is it different on 32bit vs 64bit machines? 回答1: For C# I don't believe there's a specified hard limit. (Section 2.4.2 of the C# 5 spec doesn't give a limit,

问题 Does anyone happen to know what the maximum length of a method name is in your programming language of choice? I was going to make this a C# specific question, but I think it would be nice to know across the spectrum. What are the factors involved as well: Does the language specification limit this? What does the compiler limit it to? Is it different on 32bit vs 64bit machines? 回答1: For C# I don't believe there's a specified hard limit. (Section 2.4.2 of the C# 5 spec doesn't give a limit,

问题 I am using selenium to perform integration tests on a Scala web app. I would like to either screenshot or print the html of a page into the console whenever a test fails. My current set up is Scalatest using Selenium 2.0, with Spec. Is there anyway to intercept a failure or determine the state of a test from a AfterEach override method? 回答1: To do that you'll want to override withFixture instead of using BeforeAndAfterEach. BeforeAndAfterEach's beforeEach method happens before the test, and

问题 I'm in the process of learning Mysql, and I'm creating databases. So, after looking at several websites, the definition for a primary key is: The PRIMARY KEY constraint uniquely identifies each record in a database table. and is used like this: CREATE TABLE Persons ( P_Id int NOT NULL, LastName varchar(255) NOT NULL, FirstName varchar(255), Address varchar(255), City varchar(255), PRIMARY KEY (P_Id) //primary key is on this line ) However, I still don't know what it's used for and why we need

问题 Is it possible to create Zed Notation schemes in LyX? How can it be done? 回答1: Solved it: I installed the zed-csp style package through MikTeX. Then, in LyX I went to Document->Settings->Latex Preamble and added \usepackage{zed-csp} then, to enter Zed schemes, symbols, etc., I used this reference It is entered through ERT (Evil Red Text) i.e., TeX code (Ctrl+L). Zed segments in the code should be surrounded with a \begin{zed} ... \end{zed} except schemes and such constructs that have a \begin

问题 In W3C TTML dfxp standard, a div element can contain begin , end and duration attributes. How to interpret the value of these timing attributes? Example: <div begin="00:00:22.0 end ="00:00:30.0"> <p begin="0s" end="1s">Hi,</p> <p begin="3s" end="5s">Hello</p> <p begin="5s" end="10s">there?</p> </div> When to present p elements? Any pointers to TTML spec/implementation would be helpful. 回答1: The latest TTML spec is at http://www.w3.org/TR/ttml1/ Many of the timing semantics come from SMIL 2.1.

问题 I received an issue on GitHub about my ES2015 module import/export validating plugin for ESLint not recognizing the default export in the following syntax: export { foo as default, bar } where my plugin will lint the following (equivalent?) syntax no problem: export default foo; export const bar = ..; Both Babel and Esprima parse similar syntax without errors, and this works for code using Babel on both ends (import and export). However, I'm not convinced the spec allows the former export { x

问题 I've been looking for a Microsoft document from the 1990's called CodeView Symbolic Debug Information Specification . It's referenced by Microsoft in their PE/COFF spec. Information about this document is sparse, and every lead I come across ends in a 404. Unfortunately I don't have any old MSDN CD's, which seemed to end the search for a few people. Does anyone have a copy, or know where I could find any related specs? 回答1: The one Matt Pietrek linked to, but which is not available at the

问题 JLS: The lowest precedence operator is the arrow of a lambda expression (->) , followed by the assignment operators. Followed in which direction (increasing priority, decreasing priority)? - "followed" means assignment has higher priority or lower priority (with respect to arrow operator)? I guess, in increasing, because "lowest" (for arrow) means absolutely lowest. As I understand, arrow (->) should be at the very bottom of this Princeton operator precedence table (that is below all

问题 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. 回答1: 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