Ian Kelly ian.g.kelly at
Wed Jan 21 23:54:08 CET 2015

On Tue, Jan 20, 2015 at 6:23 PM, Rustom Mody <rustompmody at> wrote:
> The Haskell is bullseye¹ in capturing the essense of a tree because
> conceptually a tree of type t is recursive in the sense that it can contain
> 2 subtrees -- (B x lst rst) -- or its a base case -- L x.

How do you create a tree containing an even number of elements under
this constraint?

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