LIBRARY: Multi-ListFindList Forward and Reverse

More Fun, matching the first or last index in a source list, to any of up to 8 possible other single list items.

NOTE: only works for string data types, and you may want to modify the separator to suit your needs (it should be something that WON'T be in any of the strings)

/*//-- Get First Index in List Source of any of List Test --//*/
integer uMatchLstIdxFwd( list vLstSrc, list vLstTst ){
  return ((llParseString2List( 
             llList2String(
               llParseStringKeepNulls(
                 llDumpList2String( vLstSrc, ";" ),
                 vLstTst, [] ),
               0 ),
             (list)";", [] ) != []) + 1) %
         ((vLstSrc != []) + 1) - 1;
}

/*//-- Get Last Index in List Source of any of List Test --//*/
integer uMatchLstIdxRev( list vLstSrc, list vLstTst ){
  return (vLstSrc != []) -
    (llParseString2List(
       llList2String(
         llParseString2List( 
           llDumpList2String( vLstSrc, ";" ),
           vLstTst, [] ),
         -1 ),
       (list)";",
       [] ) != []) - 1;
}

neither is fully checked for micro optimizations