$s = pack 'A*', unpack( 'xA*', $s ); # ASCII only, please ;)
I see no reason for the pack. And you're better of using 'a*' not 'A*', unless you really want to trim trailing spaces. 
$s = unpack 'xa*', "qwerty  ";
print "'$s'\n";

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In reply to Re^2: cut of first char of a string by bart
in thread cut of first char of a string by holli

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