On: Lessons learned after working one year as a Common...

[dreamcompiler]

I assume you mean mutable data, and yes, mutable data is easy in CL. But at the same time immutable data is not hard; it's just not the automatic default.

[taeric → dreamcompiler]

Yeah, I confess I should have said "lisp is surprisingly friendly to non-functional idioms." In large, this can mean mutable data, sure.