Kernel ^(Module)

Ensures that the version number of the installed ruby is greater than or equal to the version string supplied. Credit to Robert Klemme for posting this on ruby-talk.

 ensure_version "1.7.0"
 ensure_version "1.8.0"
 ensure_version "1.8.1"

Requires a file relative to the invoking file’s path.

For example, given the following directory structure:

  /app/run.rb
  /app/lib/relative_require.rb
  /app/code/app.rb
  /app/code/klass1.rb
  /app/code/mod1.rb
  /app/code/mod1/subklass.rb

You might use code like the following:

run.rb

  require 'lib/relative_require.rb'
  require 'code/app.rb'
  App.instance.run

app.rb

  require_relative 'klass1.rb'
  require_relative 'mod1.rb'
  ...

mod1.rb

  require_relative 'mod1/subklass.rb'
  ...