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On Fri, Oct 24, 2003 at 01:43:45PM -0700, oleg@xxxxxxxxx wrote: > > I would like to remark that 'left' and 'right' in the traditional > fold-left and fold-right do *not* refer to the order in which the > elements of a collection are fetched: from the left or from the > right. Rather, these labels refer to associativity. Let us consider an > ordered collection, e.g., a list of three elements (e1 e2 e3). Then > > fold-left opl seed lst === (((seed `opl` e1) `opl` e2) `opl` e3) > > fold-right opr seed lst === (e1 `opr` (e2 `opr` (e3 `opr` seed))) <snip> Ah. That is most enlightening as always. Bradd, I believe this means you'll have to add (define collection-fold collection-fold-left) to your code. :) Scott
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