Ruby Tips

Ruby gems on Cygwin

aka how to fix ruby: no such file to load -- ubygem (LoadError)

$ unset RUBYOPT
$ cd /tmp/
$ wget http://rubyforge.org/frs/download.php/20989/rubygems-0.9.4.tgz
$ tar -zxf rubygems-0.9.4.tgz
$ cd rubygems-0.9.4
$ ruby setup.rb

Ruby Yaml to Enum

Generate Java 1.5 enums from a YAML file

Ruby detab

A script for removing tabs from source files

Error Messages

• uninitialized constant PStore
• nonexistent sybase adapter

irb

Setup tab completion and history here: http://wiki.rubygarden.org/Ruby/page/show/Irb/TipsAndTricks

Escape invalid XML characters.

This is useful for running stuff through before posting it to the wiki.

echo "<a href=\"foo\">" | ruby -pe 'gsub!(/\&/, "&"); gsub!(/"/, """); gsub!(/</, "<"); gsub!(/>/, ">"); '
&lt;a href=&quot;foo&quot;&gt;