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Rails: Get Client IP address
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I found request.env['HTTP_X_FORWARDED_FOR'] very useful too in cases when request.remote_ip returns 127.0.0.1
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What is RSS and VSZ in Linux memory management
... way more to it than this, to learn more check the following references:
http://manpages.ubuntu.com/manpages/en/man1/ps.1.html
https://web.archive.org/web/20120520221529/http://emilics.com/blog/article/mconsumption.html
Also see:
A way to determine a process's "real" memory usage, i.e. private...
MySQL: Sort GROUP_CONCAT values
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Sure, see http://dev.mysql.com/doc/refman/...tions.html#function_group-concat:
SELECT student_name,
GROUP_CONCAT(DISTINCT test_score ORDER BY test_score DESC SEPARATOR ' ')
FROM student
GROUP BY student_name;
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How to comment in Vim's config files: “.vimrc”?
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"This is a comment in vimrc. It does not have a closing quote
Source: http://vim.wikia.com/wiki/Backing_up_and_commenting_vimrc
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How to save an HTML5 Canvas as an image on a server?
...feeScript syntax.
if you want to use javascript, please paste the code to http://js2.coffee
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WPF: Setting the Width (and Height) as a Percentage Value
...ts parent canvas:
<Window x:Class="WpfApplication1.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:WpfApplication1"
Title="Window1" Height="300" Width="300">
<Wi...
Visually managing MongoDB documents and collections [closed]
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MongoVUE download is now available @ http://blog.mongovue.com/downloads
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How do I compile and run a program in Java on my Mac?
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Download and install Eclipse, and you're good to go.
http://www.eclipse.org/downloads/
Apple provides its own version of Java, so make sure it's up-to-date.
http://developer.apple.com/java/download/
Eclipse is an integrated development environment. It has many features, but...
Vim and Ctags tips and tricks [closed]
...e_complete : function parameter complete, code snippets, and much more.
http://www.vim.org/scripts/script.php?script_id=1764
taglist.vim : Source code browser (supports C/C++, java, perl, python, tcl, sql, php, etc)
http://www.vim.org/scripts/script.php?script_id=273
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How to install Boost on Ubuntu
...ee to change or manually download yourself:
wget -O boost_1_55_0.tar.gz https://sourceforge.net/projects/boost/files/boost/1.55.0/boost_1_55_0.tar.gz/download
tar xzvf boost_1_55_0.tar.gz
cd boost_1_55_0/
Get the required libraries, main ones are icu for boost::regex support:
sudo apt-get upda...