Hi Jon, > For this 'sindex' I think it would be good to first test if Frag is > NIL, since with your version above (sindex NIL "foo") would give 1.
The 1 is (arguably) correct, because an empty string is a substring of *every* string. : (pre? NIL "bla") -> "bla ♪♫ Alex -- UNSUBSCRIBE: mailto:picolisp@software-lab.de?subject=Unsubscribe
