il Mon, 28 Jun 2004 15:03:03 +0900, "Gavin Sinclair"
<gsinclair / soyabean.com.au> ha scritto::


>The only description of #become that ever made sense to me was "like
>String#replace or Array#replace, but more general".  

I think that #become is useful in ST even for changing a fixed size
array with a bigger one. 
People may find this page interesting:
http://c2.com/cgi/wiki?RuntimeTypeMutability