大约有 44,000 项符合查询结果（耗时：0.0826秒） [XML]
Multithreading: What is the point of more threads than cores?
...nterruption. In reality this isn't the case. Even if you have four cores and four working threads, your process and it threads will constantly be being switched out for other processes and threads. If you are running any modern OS, every process has at least one thread, and many have more. All t...
I want to remove double quotes from a String
...s).
Here's how it works:
['"] is a character class, matches both single and double quotes. you can replace this with " to only match double quotes.
+: one or more quotes, chars, as defined by the preceding char-class (optional)
g: the global flag. This tells JS to apply the regex to the entire st...
What is the difference between atomic / volatile / synchronized?
...return counter++;
}
It basically reads value from memory, increments it and puts back to memory. This works in single thread but nowadays, in the era of multi-core, multi-CPU, multi-level caches it won't work correctly. First of all it introduces race condition (several threads can read the value...
Difference between null and empty (“”) Java String
What is the difference between null and the "" (empty string)?
22 Answers
22
...
Exit single-user mode
Currently, my database is in Single User mode. When I try to expand me database, I get an error:
18 Answers
...
How to recover MySQL database from .myd, .myi, .frm files
...
If these are MyISAM tables, then plopping the .FRM, .MYD, and .MYI files into a database directory (e.g., /var/lib/mysql/dbname) will make that table available. It doesn't have to be the same database as they came from, the same server, the same MySQL version, or the same architectu...
AI2 Media Notification
...lized with the app name. When a broadcast is received, the name is checked and only the appropriate messages are processed. Kodular now also provides many Androidx functions. Only "androidx.media.jar" has to be integrated. The Foreground service is now declared via UsesServices annotaion in ...
socket.io rooms or namespacing?
I am investigating nodejs/socket.io for real time chat, and I need some advice for implementing rooms.
5 Answers
...
What are some resources for getting started in operating system development? [closed]
...ay the bootloader takes the machine code of the kernel, puts it in memory, and jumps to it. You can put any machine code in the kernel that you want, but most C programs expect an OS so you'll need to tell your compiler that it won't have all that, or the bootloader has to create some of it.
The k...
How to declare global variables in Android?
I am creating an application which requires login. I created the main and the login activity.
17 Answers
...