local

问题 Is there anyway that I can save or access a local variable outside of it's function? Consider the code below: $( "#droppable2" ).droppable({ activeClass: "ui-state-hover", hoverClass: "ui-state-active", accept: "#draggable3", drop: function( event, ui ) { jdc = $(this).attr("id"); //I need to use this value later $( this ) .addClass( "ui-state-highlight" ); var x = ui.helper.clone(); x.appendTo('body'); var jdi = $("img").attr("id");// I need to use this value later $(this).droppable(

问题 I'm trying to write a script to copy files in my RaspberryPi, from my Desktop PC. Here is my code: (a part) print "start the copy" path_pi = '//192.168.2.2:22/home/pi/Stock/' file_pc = path_file + "/" + file print "the file to copy is: ", file_pc shutil.copy2(file_pc, path_pi + file_pi) Actually I have this error: (in french) IOError: [Errno 2] Aucun fichier ou dossier de ce type: '//192.168.2.2:22/home/pi/Stock/exemple.txt' So, how could I proceed? Must I connect the 2 machines before trying

问题 I want to test add local notification. I want it repeat daily/hourly. How can I do that? NSCalendar *calendar = [NSCalendar autoupdatingCurrentCalendar]; // Get the current date NSDate *now = [NSDate date]; // Break the date up into components NSDateComponents *dateComponents = [calendar components:( NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit ) fromDate:now]; NSDateComponents *timeComponents = [calendar components:( NSHourCalendarUnit | NSMinuteCalendarUnit |

问题 In the following Python code, I get an UnboundLocalError . As I understand it, local functions share the local variables of the containing function, but this hardly seems to be the case here. I recognise that a is an immutable value in this context, but that should not be a problem. def outer(): a = 0 def inner(): a += 1 inner() outer() It would seem that the inner function has received copies of all the references in the parent function, as I do not get the UnboundLocalError exception if the

问题 Introduction I work with RapidWeaver — Mac OS X CMS application — and it uses no server environment. It has an editor and a preview mode. The preview mode is a Webkit based renderer, and I can use 'Inspect Element', like you normally could do in Safari. I want to store some settings for a toolbar, either using localStorage or SQLite . I have read some information about indexedDB, though I have found no concrete implementations on how to use it. Problems with localStorage localStorage works

问题 I'm trying to debug a portion of code for an assignment (I'm still very new to Java) and have combed through many resources to solve this conflict but still can't quite work it out. public static void main(String [] args){ Scanner keyboard = new Scanner(System.in); String input = null; do { System.out.println("Enter 'A' for option A or 'B' for option B."); String input = keyboard.next(); input.toLowerCase(); input.charAt(0); } while ((input != "a") || (input != "b")); } I always get a

问题 I'm trying to solve an assignment (I'm still very new to Java) and have combed through many resources to solve this conflict but still can't quite work it out.(NOTE: Tuna is my Scanner variable) int counted, sum, counted1; System.out.print("Enter your number to be calculated: "); counted = tuna.nextInt(); counted1 =tuna.nextInt(); for(int counted=0;counted<=counted1;counted++){ System.out.println("The sum is: "+ counted); } } } Result is: Exception in thread "main" java.lang.Error: Unresolved

问题 I created a Java application which opens an xml file that looks something like this: <AnimalTree> <animal> <mammal>canine</mammal> <color>blue</color> </animal> <!-- ... --> </AnimalTree> And I can open it using: File fXmlFile = getResources.getXml("res/xml/data.xml"); DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance(); DocumentBuilder dBuilder = dbFactory.newDocumentBuilder(); Document doc = dBuilder.parse(fXmlFile); doc.getDocumentElement().normalize(); NodeList

问题 This question already has answers here : How to access a local variable from a different function using pointers? (9 answers) Closed 6 years ago . I found this question on my study guide, and I am not sure why it would be bad to return a pointer to a local variable/parameter. Any ideas? 回答1: It's not so much a "bad practice" (implying that it might cause problems) as much as it is a practice that will absolutely cause undefined behavior . It's like dereferencing a null pointer: don't do it

问题 This question already has answers here : How to access a local variable from a different function using pointers? (9 answers) Closed 6 years ago . I found this question on my study guide, and I am not sure why it would be bad to return a pointer to a local variable/parameter. Any ideas? 回答1: It's not so much a "bad practice" (implying that it might cause problems) as much as it is a practice that will absolutely cause undefined behavior . It's like dereferencing a null pointer: don't do it