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index match function in sas. This row number is then fed into the syntax of the INDEX function. The SAS INDEX function is used to search for a specified string of characters.
Sas Help Center Week Function from documentation.sas.com
SAS Functions and CALL Routines by Category Tree level 5. If there are multiple occurrences of the string INDEX returns only the position of the first occurrence. For example perhaps you want to search for - _ or X.
The matching function above and the Perl substitution function which in a PRXPARSE function will look like.
If index lowcase charvarthis 0 or index lowcase charvarthat 0 or index lowcase charvarother 0 then found 1. But these are not the same. This is especially common when merging data sets. If you use perl-regular-expression PRXMATCH searches source with the perl-regular-expression and you do not need to call PRXPARSE.
