Tom Phoenix

NAME

List::Permutor - Process all possible permutations of a list

SYNOPSIS

  use List::Permutor;
  my $perm = new List::Permutor qw/ fred barney betty /;
  while (my @set = $perm->next) {
      print "One order is @set.\n";
  }

DESCRIPTION

Make the object by passing a list of the objects to be permuted. Each time that next() is called, another permutation will be returned. When there are no more, it returns the empty list.

METHODS

new LIST

Returns a permutor for the given items.

next

Returns a list of the items in the next permutation. Permutations are returned "in order". That is, the permutations of (1..5) will be sorted numerically: The first is (1, 2, 3, 4, 5) and the last is (5, 4, 3, 2, 1).

peek

Returns the list of items which would be returned by next(), but doesn't advance the sequence. Could be useful if you wished to skip over just a few unwanted permutations.

reset

Resets the iterator to the start. May be used at any time, whether the entire set has been produced or not. Has no useful return value.

AUTHOR

Tom Phoenix <rootbeer@redcat.com>




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