global-variables

问题 I read the following on w3schools and I don´t understand what it means by the second part: [global variables] remain available to new pages loaded into the same window. Anyone can enlighten me ? In a web browser, global variables are deleted when you close the browser window (or tab), but remain available to new pages loaded into the same window. link: https://www.w3schools.com/js/js_scope.asp 回答1: If w3schools really says that (heaven help us, it does) , it's just plain wrong, as can easily

问题 Given that this works as I'd expect: (do (println (resolve 'a)) ; nil (def a "a") (println (resolve 'a))) ; #'user/a I'd like to understand why this doesn't: (future (println (resolve 'b)) ; #'user/b (shouldn't it be still undefined at this point?) (def b "b") (println (resolve 'b))) ; #'user/b I'd also like to know if this is a proper solution (not exactly solving the same problem, but doing an equivalent job in my context): (def c (atom nil)) (future (println @c) ; nil (reset! c "c")

问题 i have 2 source files (.c) named file1.c and file2.c which need to share between them a variable, so that if in one source file the variable is been updated then in the other sourced file when accessing this variable the change will be seen. what i did is create another source file called file3.c and header file called file3.h (which, of course, is been included in file1.c file2.c and in file3.c) in file3.c: int myvariable = 0; void update(){//updating the variable myvariable++; } int get(){/

问题 When an app have been put into the background and later resumes to an activity, is it possible that static class variables set in another Activity could have been reset by the garbage collector and have got the value set to zero? I use a couple of public static int variables in my main Activity and use them as global variables in various other Activities. I have received a crash report in the developer console from Android Market where the only explanation I can find is that the app resumes

问题 I've been working on trying to create a global variable in Kivy for a widget property for days. I am getting incredibly frustrated (probably because I an new to coding in general) and there doesn't seem to be any help available online for this problem. My code is as follows [PYTHON followed by the KIVY]: from kivy.app import App from kivy.uix.floatlayout import FloatLayout from kivy.uix.accordion import Accordion, AccordionItem from kivy.uix.boxlayout import BoxLayout from kivy.uix.textinput

问题 I'm sharing some variables accross activities by using a class like this : public class Globals { static Boolean hint1_graph_type_switcher; static Boolean hint2_stockview_valuation; other variables ... } then I'm using these variables anywhere across my multiple activites with ... if (Globals.hint2_stockview_valuation == false) { .... } pretty basic and it was working fine untill ... I introduced some webview stuff like this: //----------------------------------------------------------- //

问题 In my app I find myself using stftime a lot, and mostly with 2 strings formats - ("%d/%m/%Y") and ("%H:%M") Instead of writing the string each time, I want to store those strings in some global var or something, so I can define the format strings in just one place in my app. What is the pythonic way of doing that? Should I use a global dict, a class, a function, or maybe something else? Maybe like this? class TimeFormats(): def __init__(self): self.date = "%d/%m/%Y" self.time = "%H:%M" Or

问题 I was trying out some simple JS code. I was aware that we should use var keyword to declare a loop variable inside the loop say for loop to avoid global variable declaration. However I realized that the loop variable exists after the execution of the loop too: var a = [1, 2, 3, 4, 5, 6]; for (var i = 0; i < a.length; i++) document.write(a[i]); //123456 document.write(i); //6 This is not inline (in fact it does not need to be, I know) with how loop variable of for loop in Object Oriented

问题 I want my script to run faster, so the purpose is, to use my cores simultaneously. The problem is that i somehow miss a layer of globality. I want my globals to be persistent within some functions, but i want them to be different in each loop-call. what i want to do: parfor i:T createData() % global variables are being created useData() % several functions need access to global vars end I thankful for any idea, to make this loop work simultaneously, subject to keeping my variables global.

问题 I have been using the Locals window to check the assignments for procedure level variables. I have recently updated my code to create a set of public-level variables that read certain inputs from the sheets which do not change from project to project. When seeking to check these variables, I do not see them in the Locals window, no doubt because they are not locally-defined variables! Is there an alternative to the Locals Window for Public variables? And if not, how am I supposed to check