Hey, these are not errors, only warnings, but thanks, I used useless lines only for example. My problem was: to find coordinates of last match (/1+/) of string such like "010110111011110". I used such code lines: 
"010110111011110" =~ /1+/g; 
       # Global means search for match from the 
       # beginning to the end of string. 
       # Last match should be "1111" at positions 
       # from somewhere >10 and >10+4,
       # but 
print "@LAST_MATCH_START|@LAST_MATCH_END\n";
       # don't say so.
       # It prints me "|\n"

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In reply to Re^2: nooby question about @+, @- by rsFalse
in thread nooby question about @+, @- by rsFalse

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