The encoding of “Test String” is the implementation-defined system encoding (the narrow, possibly multibyte one). The encoding of u8″Test String” is always UTF-8. The examples aren’t terribly telling. If you included some Unicode literals (such as \U0010FFFF) into the string, then you would always get those (encoded as UTF-8), but whether they could be expressed … Read more
It makes it easier to pick out values in a memory dump. Example: enum state { waiting, running, stopped }; vs. enum state { waiting = ‘wait’, running = ‘run.’, stopped = ‘stop’ }; a memory dump after the following statement: s = stopped; might look like: 00 00 00 02 . . . . … Read more
While initialization the anonymous struct is only known under its type name (in your case A). The members and functions associated with the struct are only exported to the outside after the instance exists. You have to supply a valid instance of A to initialize MemberA: b := B { A: A{MemberA: “test1”}, MemberB: “test2”, … Read more
It turns out it is possible, although that surprised me. Section 3.10.2 of the JLS gives the structure of floating point literals, including HexadecimalFloatingPointLiteral. public class Test { public static void main(String[] args) { double d1 = 0xAAAAAAAAAAAAAAAAAAp0d; double d2 = 0x1.8p1d; System.out.println(d1); // A very big number System.out.println(d2); // 24 = 1.5 * 2^1 … Read more
For your final question: how can a const reference keep pointing to an R-Value (anonymous variable) Here is the answer. The C++ language says that a local const reference prolongs the lifetime of temporary values until the end of the containing scope, but saving you the cost of a copy-construction (i.e. if you were to use an … Read more
In Ruby 2.3(.0), these are all the same: {:”a” => 1} {“a”: 1}, {:a => 1} {a: 1} They all translate to the same thing: a is a symbol in all these cases. {“a”=>1} is different: a is a string in this case.
For anyone that finds this question in the future, as of CoffeeScript 1.9.1 interpolated object literal keys are supported! The syntax looks like this: myObject = a: 1 “#{ 1 + 2 }”: 3 See https://github.com/jashkenas/coffeescript/commit/76c076db555c9ac7c325c3b285cd74644a9bf0d2
To add a single quote to a string, you include two ‘ marks e.g. str := ”’test string”’; Writeln(str) In the string above, you have the normal single quotation to start a string and then two for the single quote. Same goes for the end of the string. You can also use # followed by … Read more
Short answer: it cannot be done. Long answer: the format! macro (and its derivatives) requires a string literal, that is a string known at compilation-time. In exchange for this requirement, if the arguments provided do not match the format, a compilation error is raised. What you are looking for is known as a template engine. … Read more
Update a few years later: Python 3.6 now supports PEP515, and so you can use _ for float and integer literal readability improvement. Python 3.6.1 (v3.6.1:69c0db5, Mar 21 2017, 18:41:36) [MSC v.1900 64 bit (AMD64)] on win32 Type “help”, “copyright”, “credits” or “license” for more information. >>> 1_1000 11000 >>> For historical reference, you can … Read more