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Change text color based on brightness of the covered background area?
...Math.random() * 255);
rgb[2] = Math.round(Math.random() * 255);
// http://www.w3.org/TR/AERT#color-contrast
const brightness = Math.round(((parseInt(rgb[0]) * 299) +
(parseInt(rgb[1]) * 587) +
(parseInt(rgb[2]) * 114)) / 1000);
const textCo...
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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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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What's so bad about Template Haskell?
...uasi-quoters I've been working on lately (using haskell-src-exts / meta) - https://github.com/mgsloan/quasi-extras/tree/master/examples . I know this introduces some bugs such as not being able to splice in the generalized list comprehensions. However, I think that there's a good chance that some of...
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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