Execise 1.31 1.32 1.33

[David Ben David]

What need do contents-of?
(contents-of '(red (bin (dean 1 2) 2) (sean 1 (chean 1 2)))) -> ?

[Mitchell Wand]

These exercises refer to Definition 1.1.7, which says

Bintree := Int | (Symbol Bintree Bintree)

I believe what's intended here is that contents-of should return the contents of a leaf, or the symbol of an interior node.  So we should have:

(contents-of 37) = 37

(contents-of  '(red (bin (dean 1 2) 2) (sean 1 (chean 1 2)))) = red

(lson         '(red (bin (dean 1 2) 2) (sean 1 (chean 1 2)))) = (bin (dean 1 2) 2)

(rson         '(red (bin (dean 1 2) 2) (sean 1 (chean 1 2)))) = (sean 1 (chean 1 2))

--Prof. Wand

On Wed, Mar 19, 2014 at 7:31 PM, David Ben David <tig...@gmail.com> wrote:

What need do contents-of?
(contents-of '(red (bin (dean 1 2) 2) (sean 1 (chean 1 2)))) -> ?

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[David Ben David]

Thanks.

пятница, 21 марта 2014 г., 19:55:06 UTC+2 пользователь Mitch написал: