大约有 44,900 项符合查询结果（耗时：0.0445秒） [XML]
Redirect stderr and stdout in Bash
...
792
Take a look here. Should be:
yourcommand &>filename
(redirects both stdout and stderr ...
Import error: No module name urllib2
...
As stated in the urllib2 documentation:
The urllib2 module has been split across several modules in Python 3 named urllib.request and urllib.error. The 2to3 tool will automatically adapt imports when converting your sources to Python 3.
So yo...
Are tuples more efficient than lists in Python?
... is much faster than assigning a list.
>>> def a():
... x=[1,2,3,4,5]
... y=x[2]
...
>>> def b():
... x=(1,2,3,4,5)
... y=x[2]
...
>>> import dis
>>> dis.dis(a)
2 0 LOAD_CONST 1 (1)
3 LOAD_CONST ...
Java code To convert byte to Hexadecimal
...
byte[] bytes = {-1, 0, 1, 2, 3 };
StringBuilder sb = new StringBuilder();
for (byte b : bytes) {
sb.append(String.format("%02X ", b));
}
System.out.println(sb.toString());
// prints "FF 00 01 02 03 "
See also
java.util....
MongoDB数据导出导入工具：mongoexport,mongoimport - 大数据 & AI - 清泛...
...xit
-h [ --host ] arg mongo host to connect to ( <set name>/s1,s2 for sets)
--port arg server port. Can also use --host hostname:port
--ipv6 enable IPv6 support (disabled by default)
-u [ --username ] arg username
-p [ --password ] arg ...
What is the difference between Lisp-1 and Lisp-2?
I have tried to understand the difference between Lisp-1 and Lisp-2 and how this relates to Clojure but I still do not understand properly. Can anyone enlighten me?
...
Grep regex NOT containing string
...
answered May 2 '12 at 10:10
beerbajaybeerbajay
16.2k44 gold badges4848 silver badges7070 bronze badges
...
What is the reason for having '//' in Python? [duplicate]
...
527
In Python 3, they made the / operator do a floating-point division, and added the // operator t...
How to add new item to hash
...eate the hash:
hash = {:item1 => 1}
Add a new item to it:
hash[:item2] = 2
share
|
improve this answer
|
follow
|
...
How to fix error with xml2-config not found when installing PHP from sources?
...
All you need to do instal install package libxml2-dev for example:
sudo apt-get install libxml2-dev
On CentOS/RHEL:
sudo yum install libxml2-devel
share
|
improve thi...