大约有 35,000 项符合查询结果（耗时：0.0391秒） [XML]
What is the difference between varchar and nvarchar?
...data. A varchar column is restricted to an 8-bit codepage. Some people think that varchar should be used because it takes up less space. I believe this is not the correct answer. Codepage incompatabilities are a pain, and Unicode is the cure for codepage problems. With cheap disk and memory nowadays...
When should I use Memcache instead of Memcached?
...es named memcache and memcached . What is the difference and how do you know which one to use? Is one outdated? It seems that memcached offers more methods so I would assume that means it has had the most development - but it also seems to require external C/C++ libraries so I'm not sure if I c...
What is LINQ and what does it do? [closed]
What is LINQ? I know it's for databases, but what does it do?
7 Answers
7
...
Display Animated GIF
...ndroid.graphics.Movie class.
This is not too much documented, but is in SDK Reference. Moreover, it is used in Samples in ApiDemos in BitmapDecode example with some animated flag.
share
|
improve t...
How do I determine if a port is open on a Windows server? [closed]
... that you're trying to use:
On the server itself, use netstat -an to check to see which ports are listening.
From outside, just use telnet host port (or telnet host:port on Unix systems) to see if the connection is refused, accepted, or timeouts.
On that latter test, then in general:
connectio...
What does “while True” mean in Python?
...
while True means loop forever. The while statement takes an expression and executes the loop body while the expression evaluates to (boolean) "true". True always evaluates to boolean "true" and thus executes the loop body indefinitely. It's an idiom that you'll just get used to...
Create a date from day month and year with T-SQL
...
Cade RouxCade Roux
82.1k3838 gold badges167167 silver badges258258 bronze badges
...
How do 20 questions AI algorithms work?
...
You can think of it as the Binary Search Algorithm.
In each iteration, we ask a question, which should eliminate roughly half of the possible word choices. If there are total of N words, then we can expect to get an answer after log2(N) ...
How do I send an HTML email?
...
Dave Jarvis
27.6k3535 gold badges157157 silver badges281281 bronze badges
answered Feb 21 '11 at 17:06
BalusCBalusC
...
Finding out whether a string is numeric or not
How can we check if a string is made up of numbers only. I am taking out a substring from a string and want to check if it is a numeric substring or not.
...