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Perl 5 version 18.2 documentation
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Perl functions A-Z | Perl functions by category | The 'perlfunc' manpage

- 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 ?one-time? searches

  Resetting `"A-Z"` is not recommended because you'll wipe out your `@ARGV` and `@INC` arrays and your `%ENV` hash. 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.