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find

String.find

(substring String, from i64)
 => 
option i64
find (utf8-byte-) index of 'substring' within this string,
starting the search at 'from'.

the index of 'substring' is given in relation to the start
of the entire string.
Precondition
pre
  debug: from ≥ 0
0.099dev (GIT hash 02118e9cbed77f3897084a4a507da3f11ac8881e)
last changed: 2026-09-02