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View Rails
Rails 3 no longer auto loads the lib folder. We can make it auto load the lib folder by putting it in config/application.rb like thus: config.autoload_paths += %W(#{config.root}/lib)
All strings are HTML escaped by default in Rails 3. Need to call html_safe on strings which we know are sure to be safe to display the HTML properly.
Reserved words: "config", "process"
Specifying RailsEnv in Apache configuration (vhost/httpd.conf etc) for Passenger 3.0.0 does not work in Rails 3. Changing that to RakeEnv does the trick. This was fixed in Passenger 3.0.1.
To add the default integer primary key to a table which was created with :id => false setting, we can do add_column :table_name, :id, :primary_key
View gist:713678
Use ssh-copy-id to install your public key in a remote machine's authorized_keys. Also takes care of the permissions of the remote user's .ssh and .ssh/authorized_keys.
ssh -t reachable_host ssh unreachable_host. Enables to connect to a host unreachable from current network but reachable from reachable_host's network.
To navigate to a directory, run a command and get back: (cd /to/dir && cmd_to_run)
To rip audio out of a video file: mplayer -ao pcm -vo null -vc dummy -dumpaudio -dumpfile <out_file> <in_file>
Rsync: rsync --recursive -avz -e "ssh -p 2020" user@machine:/path dest
View gist:743727
git remote prune origin - to remove a deleted remote branch.
git rebase -i - interactive rebase with options to pick, squash, discard and reorder commits.
git update-index --assume-unchanged
Undoing a merge:
$ git pull $REMOTE $BRANCH
# uh oh, that wasn't right
$ git reset --hard ORIG_HEAD
# all is right with the world
@vijaydev
vijaydev / gist:755496
Created Dec 26, 2010 — forked from lifo/gist:31208
An Example Rails 3 Application Template
View gist:755496
run "rm public/index.html"
generate(:scaffold, "item name:string")
route "root :to => 'items#index'"
rake("db:migrate", "production")
gem 'ruby-openid'
gem 'will-paginate', :git => 'git://github.com/mislav/will_paginate.git'
add_source "http://code.whytheluckystiff.net"
gem "hpricot", :version => '0.6'
View gist:766944
"ensure" makes sure code is run regardless of begin-rescue outcome. (equivalent of Java finally)
Pass a number parameter to Array#first and Array#last to get the first n or the last n values.
http://rubyquicktips.tumblr.com/post/870337608/grep-anything-from-your-enumerables
View RVM%20Rails%20Installs
rvm use ree-1.8.7-2010.02@global
rvm gemset create rails2310
gem install rails -v=2.3.10
View deploy.rb
Dir[File.join(File.dirname(__FILE__), '..', 'vendor', 'gems', 'hoptoad_notifier-*')].each do |vendored_notifier|
$: << File.join(vendored_notifier, 'lib')
end
View subdomain_fu.rb
SubdomainFu.configure do |config|
config.tld_size = 1
config.mirrors = %w( support blog www billing help api )
config.preferred_mirror = 'www'
end
View Vim Tricks
.s@\(\d\+\)@\=(submatch(1) + 17)@
Search for numbers and replace them with results of expressions involving them. submatch(1) is \1 (groups in regexes)
View process.rb
#@data = Hash.new { |h,k| h[k] = Hash.new { |h1,k1| h1[k1] = Array.new(8) {0} } } #Interesting
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