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Jay Glascoe <jglascoe@jay.giss.nasa.gov> writes: > On Tue, 3 Nov 1998, Ian Bicking wrote: > > I think we have different notions of what dictionary-map should do. > > IMHO it should return a dictionary. Just like map is a function that > > transforms one list into another, dictionary-map should transform one > > dictionary into another. > > woh. I didn't even think of that. Let me take a look at some other > functional languages (Haskell and ML) and see what they do. > > your suggestion makes "map" and "foreach" more consistent wrt each other. The Common Lisp map fcn takes as 1st argument the kind of object to return: >(map 'string #'(lambda (x) (character x)) '(71 72 73 74 75)) "GHIJK" >(map 'list #'(lambda (x) (character x)) '(71 72 73 74 75)) (#\G #\H #\I #\J #\K) >(map 'array #'(lambda (x) (character x)) '(71 72 73 74 75)) #(#\G #\H #\I #\J #\K) >(map 'string #'(lambda (x) x) "abcde") "abcde" >(map 'list #'(lambda (x) x) "abcde") (#\a #\b #\c #\d #\e) >(map 'array #'(lambda (x) x) "abcde") #(#\a #\b #\c #\d #\e) -- Harvey J. Stein BFM Financial Research hjstein@bfr.co.il