pt@pt-laptop:~$ sudo gem install fastercsv
Successfully installed fastercsv-1.5.3
1 gem installed
Installing ri documentation for fastercsv-1.5.3...
Updating class cache with 1729 classes...
Installing RDoc documentation for fastercsv-1.5.3...
pt@pt-laptop:~$ fri  Date
/usr/local/ruby/lib/ruby/gems/1.9.1/gems/fastri-0.3.1.1/lib/fastri/util.rb:38:in
`require': no such file to load -- rdoc/ri/ri_paths (LoadError)
  from
/usr/local/ruby/lib/ruby/gems/1.9.1/gems/fastri-0.3.1.1/lib/fastri/util.rb:38:in
`<top (required)>'
  from
/usr/local/ruby/lib/ruby/gems/1.9.1/gems/fastri-0.3.1.1/bin/fri:6:in
`require'
  from
/usr/local/ruby/lib/ruby/gems/1.9.1/gems/fastri-0.3.1.1/bin/fri:6:in
`<top (required)>'
  from /usr/local/ruby/bin/fri:19:in `load'
  from /usr/local/ruby/bin/fri:19:in `<main>'
pt@pt-laptop:~$
/usr/local/ruby/lib/ruby/gems/1.9.1/gems/fastri-0.3.1.1/bin/fri  Date
/usr/local/ruby/lib/ruby/gems/1.9.1/gems/fastri-0.3.1.1/lib/fastri/util.rb:38:in
`require': no such file to load -- rdoc/ri/ri_paths (LoadError)
  from
/usr/local/ruby/lib/ruby/gems/1.9.1/gems/fastri-0.3.1.1/lib/fastri/util.rb:38:in
`<top (required)>'
  from
/usr/local/ruby/lib/ruby/gems/1.9.1/gems/fastri-0.3.1.1/bin/fri:6:in
`require'
  from
/usr/local/ruby/lib/ruby/gems/1.9.1/gems/fastri-0.3.1.1/bin/fri:6:in
`<main>'
pt@pt-laptop:~$ fri each_with_index
/usr/local/ruby/lib/ruby/gems/1.9.1/gems/fastri-0.3.1.1/lib/fastri/util.rb:38:in
`require': no such file to load -- rdoc/ri/ri_paths (LoadError)
  from
/usr/local/ruby/lib/ruby/gems/1.9.1/gems/fastri-0.3.1.1/lib/fastri/util.rb:38:in
`<top (required)>'
  from
/usr/local/ruby/lib/ruby/gems/1.9.1/gems/fastri-0.3.1.1/bin/fri:6:in
`require'
  from
/usr/local/ruby/lib/ruby/gems/1.9.1/gems/fastri-0.3.1.1/bin/fri:6:in
`<top (required)>'
  from /usr/local/ruby/bin/fri:19:in `load'
  from /usr/local/ruby/bin/fri:19:in `<main>'
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