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A comment on Where Lisp Fits. Parent comment

Re:Where Lisp Fits by hga on Monday February 03, 2014 @12:26PM (#7172030)
Also called Lisp-1 vs. Lisp-2; mainline LISP has separate namespaces for function and variable values, Scheme and Clojure have just one.

This was the big breaking change from Scheme that CL wasn't willing to make because it would have broken too much invaluable code.

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Re:Where Lisp Fits by kennethtilton on Monday February 10, 2014 @09:32AM (#7211223)
...because it was a bad idea. I did some serious work with a Lisp-1 (Arc) and it was a PITA with no discernible win to it.
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