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> Lisp doesn't have immutable data structures Racket does have immutable data structures and Dr. Racket has a good REPL IMHO. http://beautifulracket.com/expla

> Lisp doesn't have immutable data structures Racket does have immutable data structures and Dr. Racket has a good REPL IMHO. http://beautifulracket.com/explainer/data-structures.html http://beautifulracket.com/explainer/data-structures.html

gumby 9y ago
That's the converse of my point. The article claimed immutable data is important for a good REPL and I said that the claim was an overstatement. I didn't say that immutable data makes a REPL impossible. I quite like immutable datastructures, as it happens.
- baldfat 9y ago
  I was replying that LISP doesn't have immutable data structures.
  - kazinator 9y ago
    Common Lisp has some immutable data structure such as, oh, numbers. If you arithmetically encode a record of data into a bignum integer, that is immutable.