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Why is (object)0 == (object)0 different from ((object)0).Equals((object)0)?
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The C# Language Specification, paragraph 7.10.6, says: The predefined reference type equality operators are: bool operator ==(object x, object y); bool operator !=(object x, object y); The operators return the result of comparing the two references...
通过 ulimit 改善系统性能 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...序都不会受其影响：
Shell 进程 1
ulimit – s 100
cat testFile > newFile
File size limit exceeded
Shell 进程 2
cat testFile > newFile
ls – s newFile
323669 newFile
那么，是否有针对某个具体用户的资源加以限制的方法呢？答...
Convert String to Uri
...o its standards. For example, try to parse: http://www.google.com/search?q=cat|dog. An exception will be thrown for the vertical bar.
urllib makes it easy to convert a string to a java.net.URI. It will pre-process and escape the URL.
assertEquals("http://www.google.com/search?q=cat%7Cdog",
Ur...
How to replace a character by a newline in Vim
...r) that were initially created in a windows environment and uploaded (i.e. FTP/SFTP) - all the ^M's you see in vim, are the CR's which linux does not translate as it uses only LF's to depict a line break.
Longer (with ASCII numbers):
NUL == 0x00 == 0 == Ctrl + @ == ^@ shown in vim
LF == 0x0A == 10...
Creating a singleton in Python
...hing that works in both Python2 and 3 requires using a slightly more complicated scheme. Since metaclasses are usually subclasses of type type, it's possible to use one to dynamically create an intermediary base class at run time with it as its metaclass and then use that as the baseclass of the pub...
Is there any downside for using a leading double slash to inherit the protocol in a URL? i.e. src=“/
...uld well have been in one form or other of the document that used to be at ftp://info.cern.ch/pub/www/doc/http-spec.txt starting in 1991, should anyone have an archive copy.
– Jon Hanna
Aug 27 '12 at 23:45
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How to send file contents as body entity using cURL
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If you want to be real fancy you can do: cat file.txt | curl --data "@-" `(< url.txt )` @- tells curl to read from stdin. You could also just use the redirect (< x.txt ) to put in whatever you want. If you're using bash.
– Breedly
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How do I remove a key from a JavaScript object? [duplicate]
...http://underscorejs.org/#omit
var thisIsObject= {
'Cow' : 'Moo',
'Cat' : 'Meow',
'Dog' : 'Bark'
};
_.omit(thisIsObject,'Cow'); //It will return a new object
=> {'Cat' : 'Meow', 'Dog' : 'Bark'} //result
If you want to modify the current object, assign the returning object to the c...
Disable password authentication for SSH [closed]
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# Change to no to disable tunnelled clear text passwords
#PasswordAuthentication no
Uncomment the second line, and, if needed, change yes to no.
Then run
service ssh restart
share
|
improve th...
C++11 tuple 这一篇就够了 - C/C++ - 清泛网 - 专注C/C++及内核技术
...,从而不用关联tuple中的第二个元素.
最后介绍一个tuple_cat()函数，通过该函数可以将多个tuple连接起来形成一个tuple（注：在VC11中只能连接两个tuple并不是真正的多个tuple）。
#include <iostream>
#include <utility>
#include <string>
#inclu...