Re: ( Substring function in Python, Lisp) -- [Hijack] contains [hijk]

Madhu <enometh@meer.net> writes:

(intern-runs "hijacks")
;; => (0 . 3) - longest substr of length 3 at position 0

I think that is not the question that was asked.  Although OP used the
term "substring", I think what was actually wanted is usually called a
subsequence, i.e. the characters in it don't have to be consecutive.  So
"hijacks" has HIJK which has length 4.  "firefighting" and
"prizefighting" both have EFGHI which has length 5.