大约有 15,000 项符合查询结果（耗时：0.0399秒） [XML]
Apache Prefork vs Worker MPM
...to how Apache handles multiple requests. Preforking, which is the default, starts a number of Apache processes (2 by default here, though I believe one can configure this through httpd.conf). Worker MPM will start a new thread per request, which I would guess, is more memory efficient. Historically,...
How to run Django's test database only in memory?
...l
$ vim /etc/mysql/my.cnf
# datadir = /dev/shm/mysql
$ sudo service mysql start
Beware, it's just for testing, after reboot your database from memory is lost!
share
|
improve this answer
...
How to split a string, but also keep the delimiters?
... while (m.find()) {
splitted.add(text.substring(last_match,m.start()));
if (this.keep_delimiters) {
splitted.add(m.group());
}
last_match = m.end();
}
splitted.add(text.substring(last_match));
return splitt...
How to align texts inside of an input?
For all default inputs, the text you fill starts on the left. How do you make it start on the right?
7 Answers
...
Dynamic constant assignment
...
In Ruby, any variable whose name starts with a capital letter is a constant and you can only assign to it once. Choose one of these alternatives:
class MyClass
MYCONSTANT = "blah"
def mymethod
MYCONSTANT
end
end
class MyClass
def mymethod
...
What is the difference between instanceof and Class.isAssignableFrom(…)?
...; i < 100; ++i)
execute();
// Time it
int count = 100000;
final long start = System.nanoTime();
for(int i=0; i<count; i++){
execute();
}
final long elapsed = System.nanoTime() - start;
Thanks to the JIT, the code is optimized at some point and we get:
instanceof: 6ms
isInstance: 12m...
What is the difference between Directory.EnumerateFiles vs Directory.GetFiles?
...d GetFiles methods differ as follows: When you use EnumerateFiles, you can start enumerating the collection of names before the whole collection is returned; when you use GetFiles, you must wait for the whole array of names to be returned before you can access the array. Therefore, when you are work...
What is a “slug” in Django?
...h molds, since after many prints they became worn out. Apprentices like me started their career there, and went all the way to the top (not anymore).
Typographs had to compose the text of an article in a backward manner with lead characters stacked in a wise. So at printing time the letters would b...
Assembly code vs Machine code vs Object code?
...l display a number of lines in different colors fetched from a table which starts at address $1437. On some tools, typing in an address, along with the rightmost part of the line above, would store to memory the values shown in the middle column, and start the next line with the following address. ...
MySQL Fire Trigger for both Insert and Update
...
@Zxaos: I'd suggest starting with dev.mysql.com/doc/refman/5.1/en/create-procedure.html (which includes some examples) and asking your own question(s) if needed.
– derobert
Jul 1 '11 at 5:21
...