Proposal: Add a catamorphism on Trees

[John Wiegley]

>>>>> Alp Mestanogullari <alpmestan at gmail.com> writes:

> +1, have implemented it in a few occasions already.

+1

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John Wiegley                  GPG fingerprint = 4710 CF98 AF9B 327B B80F
http://newartisans.com                          60E1 46C4 BD1A 7AC1 4BA2