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A function that can be used in Formulas.
rindex_caseInsensitive (string$, part$)
part$ inside string$, or 0 if not found.rindex_caseInsensitive (strings$#, s$)
s$ last occurs in strings$#.For determining where the substring is located, it doesn’t matter whether string$ and/or part$ are in lower case or upper case. Here is a comparison with rindex:
assert rindex ("hello", "L") = 0
assert rindex_caseInsensitive ("hello", "L") = 4
assert rindex ("heLlo", "L") = 3
assert rindex_caseInsensitive ("heLlo", "L") = 4
assert rindex ("helLo", "L") = 4
assert rindex_caseInsensitive ("helLo", "L") = 4
assert rindex ("heLLo", "L") = 4
assert rindex_caseInsensitive ("heLLo", "L") = 4
index_caseInsensitive for the first occurrencerindex for case-sensitive matching© Paul Boersma 2023