rindex_caseInsensitive

A function that can be used in Formulas.

Syntax and semantics

rindex_caseInsensitive (string$, part$)
return the last location of the substring part$ inside string$, or 0 if not found.
rindex_caseInsensitive (strings$#, s$)
look up whether and where s$ last occurs in strings$#.

Case insensitivity

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

See also

• index_caseInsensitive for the first occurrence
• rindex for case-sensitive matching

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© Paul Boersma 2023