try-finally is a clause used to define a block of code which may throw an exception along with instructions to execute regardless of whether an exception occurs or not.
Consider the following code:
Foo result = array[index];
index = (index + 1) % array.length;
return result;
In order to perform some final actions an extra variable is required. Does it make sense to write it as:
try {
return array[index];
}…
Today I have written a Java code that reads input from 2 txt files named input1.txt and input2.txt and solves 2 programming problems. It runs from the terminal like:
java berkSol input1.txt input2.txt
I am reading my inputs with Scanner in the…
I've seen this pattern used in a few different places now, but I'm not sure exactly what it's for or why it's needed. Given that I have seen it in quality projects, I'm sure it's useful, but I'd like to understand it rather than just blindly…
I have seen this code posted here on StackOverflow:
with TDownloadURL.Create(nil) do
try
URL := 'myurltodownload.com';
filename := 'locationtosaveto';
try
ExecuteTarget(nil);
except
result := false;
end;
if not…
In the following code fragment I'm using a semaphore to synchronize access to certain resources.
public void m () {
permit.acquire ();
while (!canFoo ()) {
permit.release ();
reticulateSpines ();
permit.acquire ();
…
Suppose a class like this:
class A {
private:
QFile file;
public:
A::A(QFile file): file(file) {}
void doSomething() {
file.open(QIODevice::WriteOnly);
// ... do operations that can throw an exception
file.close();
}…
I have tried searching around for this question, as I imagine it must have been asked at some point, but this was the closest thing I could find Remove Top-Level Container on Runtime.
My question is, is it safe execute code in a JDialog, after…
I am using the following code for a critical section of a web page
if(Monitor.TryEnter(lockObj,60000))
{
try{
//write some things to a file
}
finally
{
Monitor.Exit(lockObj);
}
}
Here, lockObj is a static member of the…
Possible Duplicate:
Purpose of else and finally in exception handling
I'd like to understand why the finally clause exists in the try/except statement. I understand what it does, but clearly I'm missing something if it deserves a place in the…
All, this is a simple one. Is there a way of testing the returned value within a finally block without doing
bool result = false;
try
{
if (someCondition)
{
result = true;
return result;
}
return result;
}
finally
{
…
Assume the following method:
public synchronized void a(){
try{
System.out.println("a");
return;
}finally{
System.out.println("a, finally");
}
}
I understand that the finally block will still be executed even…
I wanted to have some code execute before my program exited, so I thought that editing to the VS created Program.cs to look like:
...
try
{
Application.Run(new main_form);
}
finally
{
special_shutdown_code();
}
...
would do the trick, but…
I would have assumed a finally clause with only a pass to be pointless.
But in a Bottle template, the following code for an optional include would not work without it.
The result would contain everything before, and the included code itself, but…
I've encountered a situation where I'm working over a piece of code where I command changes on a remote object (that is one I can't duplicate to work over a clone), then ask the remote object for some operation in the new state and revert all the…
