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Examples:
Run `puts Rails.env` after loading the app:
<%= executable %> 'puts Rails.env'
Run the Ruby file located at `path/to/filename.rb` after loading the app:
<%= executable %> path/to/filename.rb
<% if RbConfig::CONFIG['host_os'] !~ /mswin|mingw/ %>
You can also use the runner command as a shebang line for your executables:
#!/usr/bin/env <%= File.expand_path(executable) %>
Product.all.each { |p| p.price *= 2 ; p.save! }
<% end %>
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