reserved-words | 易学教程

spark-submit fails when case class fields are reserved java keywords with backticks

阅读更多关于 spark-submit fails when case class fields are reserved java keywords with backticks

问题 I have backticks used for reserved keyword. One example for the case class is as follows: case class IPC( `type`: String, main: Boolean, normalized: String, section:String, `class`: String, subClass: String, group:String, subGroup: String ) I have declared the sparksession as follows: def run(params: SparkApp.Params): Unit ={ val sparkSession = SparkSession.builder.master("local[*]").appName("SparkUsptoParser").getOrCreate() // val conf = new SparkConf().setAppName("SparkUsptoParser").set(

SOAPpy - reserved word in named parameter list

阅读更多关于 SOAPpy - reserved word in named parameter list

问题 I'm using SOAPpy to access a SOAP Webservice. This call to the function findPathwaysByText works just fine: server.findPathwaysByText (query= 'WP619', species = 'Mus musculus') However, this call to the function login does not: server.login (user='amarillion', pass='*****') Because pass is a reserved word, python won't run this. Is there a workaround? 回答1: You could try: d = {'user':'amarillion', 'pass':'*****' } server.login(**d) This passes in the given dictionary as though they were

Windows reserved name “con” workaround / hack

阅读更多关于 Windows reserved name “con” workaround / hack

问题 I understand that "con" is a reserved name in Windows, but is there a registry hack or something that will allow me to use it? I'm on Windows 7 and trying to unzip a java project containing a file named "con.java". It fails every time. From what I've learned, "con" is no longer used in Windows 7. 回答1: You can create files with reserved names by calling the Unicode version of CreateFile (CreateFileW) and prepending \\?\ to the path. From Java you'd probably need JNI or similar to do that, or

Set CSS of code when it contains reserved words

阅读更多关于 Set CSS of code when it contains reserved words

问题 What I am trying to do : As stated in the title, I want to set the CSS of a word if it is a reserved word. HTML <html> <body> <code id="java"> public static void main(String[] args)<br> { <pre> System.out.println("Hello World!");</pre> } </code> </body> </html> jQuery $(document).ready(function() { // Get the text inside the code tags var code = $("#java").text(); // Split up each word var split = code.split(' '); // Array of reserved words var array = ["abstract","assert","boolean","break",

List of reserved words in Android

阅读更多关于 List of reserved words in Android

问题 I'm currently in the interface design process of developing another Android app and once again I seem to be trying to use reserved words for the resources (be it drawables and layouts). To my knowledge there are a set of rules you need to know: No uppercase is allowed. No symbols apart from underscore. No numbers Appart from those (please correct me if I'm wrong) I think you can't use any of the reserver words from JAVA which after a little googling appear to be the following: So my question

Can reserved function names be overloaded?

阅读更多关于 Can reserved function names be overloaded?

问题 This question is a follow-up question of this one. Consider the following program: #include <cmath> // meaningless, only for language-lawyer purpose void abs(void*) {} int main(){ abs(nullptr); } Does this program result in undefined behavior? The related part in the standard is [extern.names]/4: Each function signature from the C standard library declared with external linkage is reserved to the implementation for use as a function signature with both extern "C" and extern "C++" linkage, or

Should a using command issue a warning when using a reserved identifier?

阅读更多关于 Should a using command issue a warning when using a reserved identifier?

问题 When using the line using std::literals::chrono_literals::operator""s; in g++ 6.3.0, the compiler issues a warning stating: warning: literal operator suffixes not preceded by '_' are reserved for future standardization using std::literals::chrono_literals::operator""s; A similar warning is also issued in MSVS. However, clang 3.8.0 issues no such warning. Since operator""s is defined by the standard for the chrono library shouldn't this not issue a warning since we are just importing the name

Can't use “not”, “or”, or “plus” as identifier?

阅读更多关于 Can't use “not”, “or”, or “plus” as identifier?

问题 I tried to compile this: enum class conditional_operator { plus, or, not }; But apparently GCC (4.6) thinks these are special, while I can't find a standard that says they are (neither C++0x n3290 or C99 n2794). I'm compiling with g++ -pedantic -std=c++0x . Is this a compiler convenience? How do I turn it off? Shouldn't -std=c++0x turn this "feature" off? PS: Hmmm, apparently, MarkDown code formatting thinks so too... 回答1: Look at 2.5. They are alternative tokens for || and ! . There is a

C++ using C code using double underscores in defines and identifiers

阅读更多关于 C++ using C code using double underscores in defines and identifiers

I understand that in C++ double underscores in identifiers are reserved for the compiler. I have some C code which has characteristics similar to this in the corresponding header files: extern "C" { #define HELLO__THERE 1 int hello__out__there( int ); } I will be using this header in a C++ project, and plan to be doing things in C++ like: if (HELLO__THERE == abc) hello__out__there(foo); Is this acceptable behavior in C++, covered by the standard? double underlines in identifiers are reserved for the compiler First, it's underscore I guess. Second such identifiers are reserved. That doesn't

Is “login.ini” a reserved name?

阅读更多关于 Is “login.ini” a reserved name?

问题 I store the MRU of logins to my application in a file called login.ini and I save it in widnows application folders. I noticed that on some systems — I don't know why; I cannot find a common cause — the user cannot create the file, whereas it creates all other files in the same folder. The only reason I can think of is that some antivirus/windows setting/... doesn't allow this particular user to create the file on this system. I solved the problem by renaming the file and it seems ok, but I'd