大约有 20,000 项符合查询结果（耗时：0.0462秒） [XML]
How to use Bash to create a folder if it doesn't already exist?
...
First, in bash "[" is just a command, which expects string "]" as a last argument, so the whitespace before the closing bracket (as well as between "!" and "-d" which need to be two separate arguments too) is important:
if [ ! -d /home/mlzboy/b2c2...
Setting a timeout for socket operations
...
Use the Socket() constructor, and connect(SocketAddress endpoint, int timeout) method instead.
In your case it would look something like:
Socket socket = new Socket();
socket.connect(new InetSocketAddress(ipAddress, port), ...
List of encodings that Node.js supports
...
The list of encodings that node supports natively is rather short:
ascii
base64
hex
ucs2/ucs-2/utf16le/utf-16le
utf8/utf-8
binary/latin1 (ISO8859-1, latin1 only in node 6.4.0+)
If you are using an older version than 6.4.0, or don't want to deal with non-...
Is effective C++ still effective?
...
This what Scott Meyers himself had to say about it on his own blog
Which may lead you to wonder whether the information and advice in
this pre-C++0x edition of Effective C++ remains relevant. I'm pleased
to report that it does. Surprisingly so, in fact. Having s...
How do I force detach Screen from another SSH session?
I had Screen running inside an SSH session. Terminal froze. After restarting Terminal, that Screen session still thinks it's attached. Maybe it is. Perhaps I don't really know what that means.
...
Add a space (“ ”) after an element using :after
...
Explanation
It's worth noting that your code does insert a space
h2::after {
content: " ";
}
However, it's immediately removed.
From Anonymous inline boxes,
White space content that would subsequently be collapsed away
according to the 'white-space' ...
Export and Import all MySQL databases at one time
I want to keep a backup of all my MySQL databases. I have more than 100 MySQL databases. I want to export all of them at the same time and again import all of them into my MySQL server at one time. How can I do that?
...
Parallel.ForEach vs Task.Factory.StartNew
What is the difference between the below code snippets? Won't both be using threadpool threads?
4 Answers
...
Python super() raises TypeError
...
The reason is that super() only operates on new-style classes, which in the 2.x series means extending from object:
>>> class X(object):
def a(self):
print 'a'
>>> class Y(X):
def a(self):
...
How to negate the whole regex?
...
Use negative lookaround: (?!pattern)
Positive lookarounds can be used to assert that a pattern matches. Negative lookarounds is the opposite: it's used to assert that a pattern DOES NOT match. Some flavor supports assertions...