the
regRinstr
of
(
haystack ,
needle )
regRinstr
(
haystack ,
needle )
Haystack yields any string
. Needle yields a string
describing a regular expression.
The regRinstr
function returns the index of the last appearance of the regular expression needle in the string haystack, starting at 1. If needle cannot be found in haystack, zero
is returned.
This function is regular expression-based. For a literal version of this function, see rinstr
or csRinstr
.