Rails - May 2009 - do we usually use Iconv to do translate to various encodings

I wonder if we usually use Iconv to translate to various encoding?

For example:

Iconv.conv("UTF-8", "BIG-5", content)

or

Iconv.conv("UTF-8", "CP950", content)

or do we  usually use other packages?  One reason is that BIG-5 can
cause an exception while CP950 won''t on some content, and both of them
are supposed to be Tradtional Chinese encoding.

by the way,  iconv -l  on the shell will give names of all encodings.
Are they supposed to be usable by the  ruby Iconv library?
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