Generally used in a continue block at the end of a
loop to clear variables and reset
m?pattern? searches so that they
work again. The
expression is interpreted as a list of single characters (hyphens
allowed for ranges). All variables and arrays beginning with one of
those letters are reset to their pristine state. If the expression is
omitted, one-match searches (
m?pattern?) are reset to match again.
Only resets variables or searches in the current package. Always returns
is not recommended because you'll wipe out your
@ARGV and @INC arrays and your
Resets only package variables; lexical variables are unaffected, but
they clean themselves up on scope exit anyway, so you'll probably want
to use them instead. See my.