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2 points by akkartik 3143 days ago | link | parent

rocketnia had a nice comparison of extend with defgeneric in the original thread: http://arclanguage.org/item?id=11779. aw chimed in as well: "If there's a facility that does what you need, use it, but if there isn't, use 'extend ^_^" :)

(Thanks for the pointer to coerce, rocketnia)

My experience since then has been that the efficiency of a hash-table lookup is irrelevant. But I really like the conciseness and readability of being able to say:

  (defmethod foo(arg1 arg2) type-of-arg1
    ...)
---

"you have something in arc.arc which throws me redefinition messages whenever I start up arc"

Ack, guilty as charged; I should fix that..

(update: fixed http://github.com/nex3/arc/commit/f8717f9dc3a13e4a6222120533...)