tags: markdown cheatsheet help author: admin protected: admin
{:.no_toc}
- toc {:toc}
class Numeric | |
def to_rad | |
self * Math::PI / 180 | |
end | |
end | |
# http://www.movable-type.co.uk/scripts/latlong.html | |
# loc1 and loc2 are arrays of [latitude, longitude] | |
def distance loc1, loc2 | |
lat1, lon1 = loc1 |
require 'yaml' | |
require 'logger' | |
require 'active_record' | |
namespace :db do | |
def create_database config | |
options = {:charset => 'utf8', :collation => 'utf8_unicode_ci'} | |
create_db = lambda do |config| | |
ActiveRecord::Base.establish_connection config.merge('database' => nil) |
function foo(args) { | |
var i, j, k; | |
// ... | |
// j acquires some interesting value | |
// Who called foo when j took this interesting value? | |
// | |
var e = new Error('dummy'); | |
var stack = e.stack.replace(/^[^\(]+?[\n$]/gm, '') | |
.replace(/^\s+at\s+/gm, '') |
begin | |
['oily_png', 'pp'].each do |g| | |
require g | |
end | |
rescue LoadError => e | |
puts "Could not load '#{e}'"; exit | |
end | |
class Hough | |
Convert = "/usr/local/bin/convert" |
var parser = document.createElement('a'); | |
parser.href = "http://example.com:3000/pathname/?search=test#hash"; | |
parser.protocol; // => "http:" | |
parser.hostname; // => "example.com" | |
parser.port; // => "3000" | |
parser.pathname; // => "/pathname/" | |
parser.search; // => "?search=test" | |
parser.hash; // => "#hash" | |
parser.host; // => "example.com:3000" |
require 'date' | |
# Actually doesn't matter WHAT you choose as the epoch, it | |
# won't change the algorithm. Just don't change it after you | |
# have cached computed scores. Choose something before your first | |
# post to avoid annoying negative numbers. Choose something close | |
# to your first post to keep the numbers smaller. This is, I think, | |
# reddit's own epoch. | |
$our_epoch = Time.local(2005, 12, 8, 7, 46, 43).to_time |
# $ grep '^###' ruby_nuggets.rb | |
# if you just want all headlines | |
### multiple heredoc goodness | |
head,body = <<END_HEAD,<<END_BODY | |
this is the head | |
yea still head | |
END_HEAD | |
and now some body | |
it is #{Time.now} now |
#!/usr/bin/env ruby | |
DATA.flock(File::LOCK_EX | File::LOCK_NB) or abort "Already running." | |
Process.daemon(true) | |
def active_window_info | |
Hash[`xprop -id $(xprop -root | grep "_NET_ACTIVE_WINDOW(WINDOW)" | awk '{print $5}')` | |
.scan(/^WM_(NAME|CLASS).*? = "(.*?)"(, "|$)/) | |
.map{|e| e.first.downcase!; e[0..-2]}] |
source :rubygems | |
gem "puma" | |
gem "sinatra" |