command | description |
---|---|
ctrl + a | Goto BEGINNING of command line |
#Bash Keyboard Shortcuts
###Cursor movement:
Ctrl + a Go to the beginning of the line (Home)
Ctrl + e Go to the End of the line (End)
Ctrl + p Previous command (Up arrow)
Ctrl + n Next command (Down arrow)
Alt + b Back (left) one word
Alt + f Forward (right) one word
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source :rubygems | |
gem 'pry' | |
gem 'capybara' | |
gem 'capybara-webkit' | |
gem 'celluloid' |
This guide enables you to install (ruby-build) and use (rbenv) multiple versions of ruby, isolate project gems (gemsets and/or bundler), and automatically use appropriate combinations of rubies and gems.
# Ensure system is in ship-shape.
aptitude install git zsh libssl-dev zlib1g-dev libreadline-dev libyaml-dev
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require 'active_record' | |
ActiveRecord::Base.logger = Logger.new(STDERR) | |
ActiveRecord::Base.colorize_logging = false | |
ActiveRecord::Base.establish_connection( | |
:adapter => "sqlite3", | |
:dbfile => ":memory:" | |
) |
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add_index :attachments, :parent_id | |
add_index :attachments, :asset_id | |
add_index :domain_names, :user_id | |
add_index :domain_names, :event_id | |
add_index :event_memberships, :user_id | |
add_index :event_memberships, :event_id | |
remove_index :attachments, :parent_id | |
remove_index :attachments, :asset_id | |
remove_index:domain_names, :user_id | |
remove_index:domain_names, :event_id |
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