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Re:NewLisp by astrobe_ on Friday October 07, 2016 @07:02AM (#12659659)
For mutable structures you use the "context" concept, which is also used to build a form of OOP.

For cyclic data structures, I'm not sure. I think one can pass a function, a list or a context to a function that expects a list. This it might do the trick.

Re:NewLisp by david-given on Friday October 07, 2016 @02:20PM (#12662761)
From Wikipedia:

> Sharing of sub-objects among objects, cyclic structures, or multiple variables pointing to the same object are not supported in newLISP.

Dang.