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Play! 2.0 Scala - Accessing global object

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问题 I've declared an object which gets instantiated on application start. I want to access it inside a controller, which is part of a plugin. I want to be able to use that plugin, but I can't seem to get past the first part -- finding the MyWebsocketConnection object. None of the examples show how to do this. I don't want to inject into the controller because I'm writing a plugin (I saw static examples of how to do that somewhere). Global.scala , plugin application \app\Global.scala object Global

Python vars() global name error

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问题 I'm having a bit of trouble understanding what's going wrong with the following function: def ness(): pie='yum' vars()[pie]=4 print vars()[pie] print yum So When I run that I get this result: >>> ness() 4 Traceback (most recent call last): File "<stdin>", line 1, in <module> File "<stdin>", line 5, in ness NameError: global name 'yum' is not defined If I don't write it as a function and just type it in on the command line one line at a time it works fine, like so: >>> pie='yum' >>> vars()[pie

PHP 5.3 Namespaces should i use every PHP function with backslash?

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问题 im now using namespaces in PHP 5.3 now there is a fallback mechanism for functions which dont exist in the namespace. so php every time checks if the function exists in namespace and then tries to load it from global space. So what about all php internal functions? strstr for example? Should i now use every php internal function with a \ ? to avoid php first checking the namespace? is this fallback a huge performance drop? what do you think? 回答1: No matter the performance hit, no way should

Global Error Handler for Flash Player 10.1 not working

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问题 Trying to implement the new FP 10.1 Global error handler into my projects but no matter what I do any uncaught error will still show up the Exception window (both in debug and release versions of the SWF). All I want to do is to prevent these popups but instead send a message to my logger. Here's my code ... EDIT: I simplified the code now. Could somebody do me a favor and test the following class and see if it's works for him? Because it's doesn't for me! ... package { import flash.display

NodeJS (Express.js) : How to make the Session global

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问题 I know that global vars are a bad practice in javascript and in programming overall, but i want to make my user session available throughout my express.js app, avoiding having to pass the session parameter all over, from my controllers to my models. How can I best do this? Thanks! 回答1: I ended up solving this like so: var appendLocalsToUseInViews = function(req, res, next) { //append request and session to use directly in views and avoid passing around needless stuff res.locals.session = req

Tornado - Python global variable

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I'm trying to use Tornado with SqlAlchemy, I need to pass the current user from RequestHandler (tornado) to models (SqlAlchemy) in the insert or update action. But I don't want to pass the value directly to the model, example: #### RequestHandler POST method... user = Session.query(User).get(1) user.name = "bla, bla, bla..." user.updated_by = self.current_user # don't use... session.commit() I'm using a global variable, in a __ init__.py file, and set the current user value in the RequestHandler and after, get the value, in before update event with SqlAlchemy. The idea is to know what user is

Declaring two global variables of same name in C

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问题 I have declared two global variables of same name in C. It should give error as we cannot declare same name variables in same storage class. I have checked it in C++ — it gives a compile time error, but not in C. Why? Following is the code: int a; int a = 25; int main() { return 0; } Check it out at : Code Written at Ideone I think this probably is the reason Declaration and Definition in C But this is not the case in C++. I think in C++, whether the variable is declared at global scope or

Is using the Application class as a hack-workaround for configuration changes acceptable?

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问题 I've found that in some tricky cases, it can be helpful to extend the Application class and use it to hold onto references and values that are otherwise hard to coordinate in the lifecycle through configuration changes. Is there any real downside to doing this? I can't help but feel it's "too easy" a fix which means there's probably some major downside I am not considering. 回答1: I am going to decompose your question into two sub-questions. Is there any real downside to [storing information in

Keyboard hooks without using a DLL?

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问题 I'm trying to create a program with some key bindings (F1-F12) which will pick up the key presses while out of focus (specifically, while a game is running). Is there anyway to detect these key presses without using a global hook? The language I am programming in (real studio) doesn't have a means of creating a DLL (required for a global hooks), plus, I'm hoping of having it cross platform with mac (which is what realstudio does). 回答1: While as klartex says, a low-level keyboard/mouse hook

Can I #define a constant solutionwide within c# code without project settings?

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问题 I know this was aksed and answered a a couple of times e.g. Solution-wide #define, Is There anyway to #define Constant on a Solution Basis? and How to define a constant globally in C# (like DEBUG). But in my case I can not use any of the suggested methods: I'm writing on different "modules" (or plugins if you want so) for UnityProjects (kind of a package providing a certain functionality). The idea is that a developer can load a certain "module" to use in his project by importing a