IMO, Tuple is dissimilar from hash in that the fields are both named and ordered (like a struct - that's why I call it an anonymous struct), where as hashes have no guarantee on the order of the fields... in a way tuple is similar to alist.
<br><br>CTOR and dtor are needed for properly acquire and release external resources - but this might not be the scheme way... I don't know for sure yet. <br><br>yinso <br><br><div><span class="gmail_quote">On 5/31/07,
<b class="gmail_sendername">Carl Eastlund</b> <<a href="mailto:firstname.lastname@example.org">email@example.com</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
On 6/1/07, YC <<a href="mailto:firstname.lastname@example.org">email@example.com</a>> wrote:<br>> Tuples differ from vectors that they are indexed both by name & numbers, but<br>> if struct is a named vector, in that sense it won't really be different,
<br>> except struct is opaque and hence better for building AST than vector IMHO.<br><br>Ok, you want tuples with labelled fields. Now they sound more like<br>hash tables on symbols or strings. Are they anything beyond that?