runtime

问题 I'm considering using live() to bind an event handler to a function I haven't inserted into the DOM. However this looks expensive - it must have to do a runtime check any time an element is inserted, or any time a "click" element is performed, for example, to see whether the handler should be called. Is this something worth worrying about in practice, or is Javascript so fast now that this isn't worth caring about? Reference page for the live() function: http://api.jquery.com/live/ 回答1: No,

问题 I know I can generate a class at runtime by executing $obj = (object)array('foo' => 'bar');+ this way I can use echo $obj->foo; //bar What if want to make $obj inherits from an existing class? What I wanna achive: I'm forking paris project on github (https://github.com/balanza/paris). It's an active record class. I wonder I need to declare a class for every object, even if it's empty: class User extends Model{} I guess I might use dynamic object to avoid this boring stuff. 回答1: You could

问题 I have this weird problem where whenever I #include "SDL/SDL.h" , my windows socket program doesn't execute. It compiles but it doesn't do anything when run. When I remove the #include "SDL/SDL.h" header, compile and run, it starts working again??. I'm trying to make both SDL and my original socket program work but I don't understand whats wrong this. //#include "SDL/SDL.h" #define _WIN32_WINNT 0x501 #include <iostream> #include <windows.h> #include <winsock2.h> #include <ws2tcpip.h> #include

问题 I have been trying to get my JDK and JRE to match for a couple hours now, but do not know what to do. Any help appreciated. I've checked the versions and realized they are different. I have already installed the latest JDK but do not know how to change the JRE to match the JDK. javac -version javac 12.0.1 java -version java version "1.8.0_211" C:\Users\jacob\OneDrive\Desktop\Code>java Ah Error: A JNI error has occurred, please check your installation and try again Exception in thread "main"

问题 In Objective-C, is there a way to list the categories on a particular class at runtime? With the Objective-C runtime functions I can obtain details for the class and instance methods, class hierarchy, instance variables, etc. but seemingly not the category information. Looking at F-Script, I see that it doesn't display category information (indeed, it appears not to display methods from categories at all). On the other hand, class-dump extracts category information but this is from the binary

问题 I have an API ( eg: ItemController.cs ) which would obtain the Authorization Token from the Request Header at run time. With the Token, then only I pass into my Service Class ( eg: ServiceItem.cs ). Here's how I did. At the Startup.cs, I register my ServiceItem var builder = new ContainerBuilder(); builder.RegisterType<ServiceItem>(); container = builder.Build(); //Note that, my container is a static variable In my API, I resolve it in this way: [Authorize] [Route("GetData")] [HttpGet] public

问题 I'm currently using MVC4. I have a folder in my project that has files (images, doc and pdf files). I have a database with a list of users (.net membership guids) that have permission to access each of the files. What I'm currently researching and I'm asking you advice, as I never did it on MVC: Any tip regarding how to catch the http request of the file and then decide on runtime if the user has permissions to acces or not? Is there any kind of http handler that let me do that on MVC? Any

问题 I've been dealing with an issue I'm going to assume is environment specific. I installed and reinstalled the Roslyn Templates when I add any function to the CodeFixProvider(Referenced or not). VS blows up with an system aggregate exception when trying to open the preview window: This is the full code fix provider the only thing modified is adding the new function [ExportCodeFixProvider(LanguageNames.CSharp, Name = nameof(AggregateBugAnalyzerCodeFixProvider)), Shared] public class

问题 I am using SQLAlchemy in Python and am declaring my classes inheriting from a declarative base as follows: from sqlalchemy import Column, Integer, String from sqlalchemy.ext.declarative import declarative_base Base = declarative_base() class SomeClass(Base): __tablename__ = 'some_table' id = Column(Integer, primary_key=True) name = Column(String(50)) As a user I would like to define the __tablename__ as a parameter, and not a hard-coded value , something like this: class SomeClass(Base): _

问题 I wish to open a file (lets say, a word document) from a Java application using the associated program installed on the computer (in this example, using MS Word or Open Office Writer). The catch is that I want to wait until this subprocess finishes, which can be done using the waitFor() method in the Process class. String executable = findAssociatedApplicationPath(); //for example, returns "C:\\Program Files\\Microsoft Office\\Office12\\msword.exe" Process p = Runtime.getRuntime().exec