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.
I'm writing a monitoring script in Powershell using a Try/Finally to log a message should the script end. The script is intended to run indefinitely, so I want a way to track unintended exiting.
Every other StackOverflow post and Help page I've…
In java, it is not recommended to throw exceptions inside finally section in try-chatch block due to hide the propagation of any unhandled throwable which was thrown in the try or catch block. This practice is a blocker level violation according to…
I have a general question about best practice in OO Delphi. Currently, I put try-finally blocks anywhere I create an object to free that object after usage (to avoid memory leaks). E.g.:
aObject := TObject.Create;
try
aOBject.AProcedure();
…
As this is meant as a somewhat academic question regarding the behaviour of the try/finally clause, I tried to use an example that is very generic. Is there any danger in nesting a try/finally clause like this?
openDatabaseConnection();
try {
//…
Looking at the Java Virtual Machine Specification and compiled code tells us how "synchronized" blocks are implemented in java. The following code:
public void testSync()
{
Object obj = getSomeObject();
synchronized (obj) { doSomething();…
Assume I'm going to write a Python script that catches the KeyboardInterrupt exception to be able to get terminated by the user using Ctrl+C safely
However, I can't put all critical actions (like file writes) into the catch block because it relies…
I found a situation when finally block is not called.
To the point:
using System;
using System.Collections.Generic;
using System.Threading;
using System.ComponentModel;
class MainClass{
static IEnumerable SomeYieldingMethod(){
…
It was my assumption that the finally block always gets executed as long as the program is running. However, in this console app, the finally block does not seem to get executed.
using System;
using System.Collections.Generic;
using…
Is there any case in which the following structure is needed?
using (Something something = new Something())
{
try
{
}
finally
{
something.SomeCleanup();
}
}
Or, should all cleanup tasks be performed in the implicit…
The following cx_Oracle code works fine when the database is up:
#!C:\Python27
import cx_Oracle
try:
conn = cx_Oracle.connect("scott/tiger@oracle")
try:
curs = conn.cursor()
curs.execute("SELECT dummy FROM sys.dual")
…
In new, third edition of Effective Java Joshua Bloch mentions piece of code from Java Puzzlers (it's about closing resources in try-finally):
For starters, I got it wrong on page 88 of Java Puzzlers, and no one noticed for years. In fact,…
In a Python program I have code with the following structure:
try:
value = my_function(*args)
finally:
with some_context_manager:
do_something()
if 'value' in locals():
do_something_else(value)
But the 'value' in…
I'm trying to wrap my head around this. According to this page on Using statements:
The using statement ensures that Dispose is called even if an exception occurs while you are calling methods on the object. You can achieve the same result by…
I've written seven test cases for understanding the behavior of the finally block. What is the logic behind how finally works?
package core;
public class Test {
public static void main(String[] args) {
new Test().testFinally();
}
…
When I try to execute the following function in Java:
public static int myfunc (int x) {
try {
return x;
} finally {
x++;
}
}
public static void main (String args[]) {
int y=5,z;
z = myfunc(y);
…
