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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
...系统当前状态的参数，例如 /proc/sys/kernel/pid_max，/proc/sys/net/ipv4/ip_local_port_range 等等，从文件的名字大致可以猜出所限制的资源种类。由于该目录下涉及的文件众多，在此不一一介绍。有兴趣的读者可打开其中的相关文件查阅说...
Byte[] to InputStream or OutputStream
...ByteArrayInputStream(content);
For full example please check here http://www.onlinecodegeek.com/2015/09/how-to-convert-byte-into-inputstream.html
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How to make a chain of function decorators?
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# If you are not familiar with unpacking, check:
# http://www.saltycrane.com/blog/2008/01/how-to-use-args-and-kwargs-in-python/
function_to_decorate(*args, **kwargs)
return a_wrapper_accepting_arbitrary_arguments
@a_decorator_passing_arbitrary_arguments
def function_wit...
How to enable mod_rewrite for Apache 2.2
...s-enabled/000-default
almost at the top you will find
<Directory /var/www/>
Options Indexes FollowSymLinks MultiViews
AllowOverride None
Order allow,deny
allow from all
</Directory>
Change the AllowOverride None to AllowOverride All
this worked for me
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How to print matched regex pattern using awk?
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string matching the corresponding parenthesized subexpression.
http://www.gnu.org/software/gawk/manual/gawk.html#String-Functions
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Converting PKCS#12 certificate into PEM using OpenSSL
...p12" -out "newfile.pem" -passin pass:[password] -nodes
More info: http://www.openssl.org/docs/apps/pkcs12.html
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When should I use the HashSet type?
...alue is meaningless since I'm just going to use ContainsKey. Note: Before .NET 3.0 this was the only choice for O(1) lookups - HashSet<T> was added for 3.0 and extended to implement ISet<T> for 4.0.
List<string>: If I keep the list sorted, I can use BinarySearch, which is O(log n) ...
Python/postgres/psycopg2: getting ID of row just inserted
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Consider a RETURNING clause http://www.postgresql.org/docs/8.3/static/sql-insert.html
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Resize svg when window is resized in d3.js
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d3.select(window).on('resize.updatesvg', updateWindow);
http://jsfiddle.net/Zb85u/1/
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Node.js / Express.js - How does app.router work?
... and it serves the files in that folder.
For example, express.static('/var/www') would serve the files in that folder. So a request to your Node server for http://server/file.html would serve /var/www/file.html.
router is code that runs your routes. When you do app.get('/user', function(req, res) ...