It was definitely in Arc first, and probably in other lisps before that: https://github.com/arclanguage/anarki/blob/master/arc.arc#L1628-L1631 https://github.c

It was definitely in Arc first, and probably in other lisps before that: https://github.com/arclanguage/anarki/blob/master/arc.arc#L1628-L1631 https://github.com/arclanguage/anarki/blob/master/arc.arc#L1... Edit: Yes, it's in Common Lisp too, so it goes back at least to the 1980s and probably further. http://www.lispworks.com/documentation/HyperSpec/Body/f_wr_pr.htm http://www.lispworks.com/documentation/HyperSpec/Body/f_wr_p...