Execute shell script from within ruby
1) Use the “system” method system “ls” 2) Or use backticks. Note that backticks support you returning to the results…
Migration Generator Shortcuts
Some great shortcuts for script generation. I always try to start by building scaffold for any new entity, then remove…
Ruby function to check if something is a number
def is_a_number?(s) s.to_s.match(/\A[+-]?\d+?(\.\d+)?\Z/) == nil? false : true end
Rails Plugins with SVN
I’m working with a plugin that I wrote. I want to pull the plugin into an app I’m writing, but…
Rake tasks
How can I search for available rake tasks? rake -T | grep gem (where “gem” is the thing you are…
Working with gems
Gems are installed by sources, or a repository which holds several gems. Generally all the gems you will need are…
MySQL Dumping Cheat-Sheet
Make a quick dump of a mysql database: mysql_dump db_name > backup-file.sql You can then read that dump file back…
List of Ruby Operands
operand what it does shift position of bits in Bignum and Fixnum ~ bitwise NOT (high-presendence) & bitwise AND (medium-presendence)…
Tips for Working with Rails
Go to script/console to open ruby in interactive mode. script/console loads your environments (everything in environment.rb and all your plugin…
ImageMagick
Using Mac ports sudo port install ImageMagick If you have an existing ImageMagick installed, you will get this error: Error:…