reset
reset - clear all variables of a given name
reset EXPR
reset
Generally used in a 
continue
 block at the end of a loop to clear
variables and reset ?? 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 (?pattern?) are reset to match again.  Only
resets variables or searches in the current package.  Always returns
1.  Examples:
    reset 'X';          # reset all X variables
    reset 'a-z';        # reset lower case variables
    reset;              # just reset ?? searches
Resetting ``A-Z'' is not recommended since you'll wipe out your
ARGV and ENV arrays.  Only resets package variables--lexical variables
are unaffected, but they clean themselves up on scope exit anyway,
so anymore you probably want to use them instead.  See 
my
.