local-variables

This question already has an answer here: Why would one mark local variables and method parameters as “final” in Java? [closed] 12 answers I was wondering is there any usability of using final local variables. Variables are not overridden anyway when inheritance comes into picture. For example a simple code as below public static void main(String args[]) { final String data = "Hello World!"; System.out.println(data); } The example is quite simple one and may not be a relevant code but the question is more generic.I have seen a lot of codes(all incorporated in main function which have final

I would like to write a reusable function I can call within any method to log a snapshot of all the local variables. For example: void somemethod() { int a = 1; string s = "something"; dumpLocalVariables("step 1", MethodInfo.GetCurrentMethod(), this); a++; string t = s + "else"; dumpLocalVariables("step 2", MethodInfo.GetCurrentMethod(), this); } I would like to get a console output like this: step 1 Int32 a = 1 String s = something step 2 Int32 a = 2 String s = something String t = somethingelse I want to avoid providing a specific list of local variable names. The closest I could find was

Hi I have a observable user$ with a lot of properties (name, title, address...) component{ user$:Observerable<User>; constructor(private userService:UserService){ this.user$ = this.userService.someMethodReturningObservable$() } } Is there a way to use the async pipe in the html template to subscribe to it and bind it to a local variable like this <div #user="user$ | async"> <h3> {{user.name}} </div> I know can can subscribe to it in the constructor and then unsubscribe in OnLeave/OnDestroy but I was just curious if I could use the async pipe. Cheers # is template reference variable . It defers

How can I make a variable inside the try/except block public? import urllib.request try: url = "http://www.google.com" page = urllib.request.urlopen(url) text = page.read().decode('utf8') except (ValueError, RuntimeError, TypeError, NameError): print("Unable to process your request dude!!") print(text) This code returns an error NameError: name 'text' is not defined . How can I make the variable text available outside of the try/except block? try statements do not create a new scope, but text won't be set if the call to url lib.request.urlopen raises the exception. You probably want the print

This question already has an answer here: How to dynamically create a local variable? 4 answers I'm wondering if there is a method which will allow me to dynamically define a previously undefined variable in the current context. For example: foo # => NameError: undefined method or local variable ... # Some method call which sets foo = 1 in the local context foo # => 1 Put another way, given that foo is undefined, I'm looking for any code that would let me define the local variable foo without using the foo variable (e.g. if I had some other variable bar whose value was :foo and I had to rely

This question already has an answer here: How to print value of global variable and local variable having same name? 4 answers for example #include<stdio.h> int foo = 100; int bar() { int foo; /* local foo = global foo, how to implemented? */ return 0; } int main() { int result = bar(); return 0; } I think in the function bar, calling foo directly will just get the global foo. How can I refer the local foo? I know in C++, there is this pointer. However, does C has something similar? Thanks a lot! No, by declaring foo in bar() , you have taken the global foo out of scope. Inside bar() when you

This question already has an answer here: Cannot refer to a non-final variable inside an inner class defined in a different method 20 answers I have button click listener and in onCreate() method I have a local variable like onCreate() { super.onCreate(); int i = 10; Button button = (Button)findViewById(R.id.button); button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { i++; } }); Why java asks for to make me final ? When the onCreate() method returns, your local variable will be cleaned up from the stack, so they won't exist anymore. But the anonymous