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String, StringBuffer, and StringBuilder
...nd operations in the construction of the string) and will only be accessed from a single thread, using a StringBuilder is good enough.
If your string can change, and will be accessed from multiple threads, use a StringBuffer because StringBuffer is synchronous so you have thread-safety.
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How to get thread id from a thread pool?
...messages. Thread ids are unique across threads but don't necessarily start from 0 or 1.
Here is an example matching the question:
import java.util.concurrent.*;
class ThreadIdTest {
public static void main(String[] args) {
final int numThreads = 5;
ExecutorService exec = Executors.newF...
Response.Redirect with POST instead of Get?
... spec, and even the latest, most secure IE7 will redirect the POST request from domain A to domain B without any warnings or confirmation dialogs! Safari also acts in an interesting manner, while it does not raise a confirmation dialog and performs the redirect, it throws away the POST data, effecti...
Git for beginners: The definitive practical guide
... simply a directory containing a special .git directory.
This is different from "centralised" version-control systems (like subversion), where a "repository" is hosted on a remote server, which you checkout into a "working copy" directory. With git, your working copy is the repository.
Simply run gi...
How to set a JVM TimeZone Properly
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"Please note that I do not want to set the timezone from the application."
– AbVog
Nov 2 '17 at 14:00
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Gdb print to file instead of stdout
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I've found that you can redirect the output from gdb to a file via the run command:
(gdb) run > outfile
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Visual Studio 2010 always thinks project is out of date, but nothing has changed
...er) answers for VS2012, VS2013, etc
To find the missing file(s), use info from the article Enable C++ project system logging to enable debug logging in Visual Studio and let it just tell you what's causing the rebuild:
Open the devenv.exe.config file (found in %ProgramFiles%\Microsoft Visual Stud...
What is the difference between a process and a thread?
...thread, often called the primary thread, but can create additional threads from any of its threads.
Thread
A thread is an entity within a process that can be scheduled for execution. All threads of a process share its virtual address space and system resources. In addition, each thread maintains ex...
How do I use valgrind to find memory leaks?
...l heap blocks were freed -- no leaks are possible
ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
I have a leak, but WHERE?
So, you have a memory leak, and Valgrind isn't saying anything meaningful.
Perhaps, somethi...
Why does Google +1 record my mouse movements? [closed]
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Isn't Math.random() seeded from the current timestamp? If so, with a widely deployed button like this, you'd expect a lot of collisions. Might explain the extra efforts.
– Yahel
Jul 24 '11 at 3:12
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