local-variables

问题 I have a question about the variables inside the static method. Do the variables inside the static method share the same memory location or would they have separate memory? Here is an example. public class XYZ { Public Static int A(int value) { int b = value; return b; } } If 3 different user calls execute the method A XYZ.A(10); XYZ.A(20); XYZ.A(30); at the same time. What would be the return values of each call? XYZ.A(10)=? XYZ.A(20)=? XYZ.A(30)=? 回答1: They're still local variables - they

问题 If I have a code like this: public class Program { public static void Main() { string bar = ""; int foo = 24; } } I can get the local variables declared in Main using: var flag = BindingFlags.Static | BindingFlags.Public; var fields = typeof(Program).GetMethod("Main", flags).GetMethodBody().LocalVariables; This returns a IList<LocalVariableInfo> and the LocalVariableInfo has only three properties: IsPinned , LocalIndex and LocalType .So there is no Name property exists. What I'm wondering is

问题 I needed to change variables inside an inner class and I got the infamous "Cannot refer to a non-final variable inside an inner class defined in a different method" error. void onStart(){ bt.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { int q = i; } }); } I quickly made a class that held all of the things I wanted to change and made a final version of the class outside the inner class class temp{ int q; } void onStart(){ final temp x = new temp(); bt

问题 Local variables defined outside of a thread seem to be visible from inside so that the following two uses of Thread.new seem to be the same: a = :foo Thread.new{puts a} # => :foo Thread.new(a){|a| puts a} # => :foo The document gives the example: arr = [] a, b, c = 1, 2, 3 Thread.new(a,b,c){|d, e, f| arr << d << e << f}.join arr #=> [1, 2, 3] but since a , b , c are visible from inside of the created thread, this should also be the same as: arr = [] a, b, c = 1, 2, 3 Thread.new{d, e, f = a, b

问题 I need to know if there is a way to create HTML local variables programmatically. I am developing a web app where I have an NgFor loop and I want to be able to assign a local variable to each sub element created by the NgFor. ie : <div *ngFor="#elt of eltList" > <span #setLocalVariable(elt.title)></span> </div> setLocalVariable(_title : string){ let var = do some stuff to _title; return var; } The exemple above shows you what I am trying to accomplish and obviously does not work. Is there a

问题 Short question: Is it possible to create Javadoc for local variables? (I just want an explanation for my local variable when hovering over it in Eclipse) Thanks for any hint :-) 回答1: It can be done using Annotations . Create a simple annotation type such as the following: @Retention(RetentionPolicy.SOURCE) @Target(ElementType.LOCAL_VARIABLE) @interface LocalVariableDocumentation { String value(); } And use it on your local variable: @LocalVariableDocumentation("A very important object!")

问题 I have a form in VB.NET that is used as a dialog in a mainform. Its instances are always locally defined, there's no field for it. When the user clicks the OK button in the dialog, it will fire an event with exactly one argument, an instance of one of my classes. Since it is always a local variable, how can I add an event handler for that event? I've searched for myself and found something but I can't really figure it out... Code for the event, a field in MyDialog : public Event ObjectCreated

问题 This question already has answers here : Confusion with the assignment operation inside a falsy `if` block [duplicate] (3 answers) Why is `a = a` `nil` in Ruby? (1 answer) Closed 5 years ago . This is something strange I've figured out in ruby 1.9.3. Here is the code: >> r = true >> if r >> a = "hello" >> else >> b = "hello" >> end Now the value of a is "hello": >> a => "hello" And strangely the value of b is nil >> b => nil Since b is nowhere in the scene, it should be undeclared. Why? 回答1:

问题 I have a simple piece of code that I guess I'm using local and global variables in it. But, I have a hard time understanding what's going wrong in here. I am setting "var hhhh:Int = 0" at first. Then, inside the if statement, I set "hhhh = appleCount["count"] as! Int". Since appleCount["count"] is not zero and has some value, hhhh gets its' value (I tried that uisng a print statement and hhhh is not zero inside if statement), but, later when I print hhhh with print("(hhhh)") outside if, I

问题 def method a = 3 b = 4 some_method_that_gives # [a, b] end 回答1: local_variables It outputs array of symbols, presenting variables. In your case: [:a, :b] 回答2: local_variables lists local variables but it lists them before they are defined. See this: p local_variables a = 1 p local_variables this outputs [:a] [:a] which may not be what you expect. Contrast with defined? p defined? a a = 1 p defined? a which outputs the more anticipated nil "local-variable" 来源： https://stackoverflow.com