Data::Eacherator - simple each-like iterator generator for hashes and arrays


  my $iter = eacherator($hash_or_array);

  while (my ($k, $v) = $iter->()) {
      # ...


This module is designed as a simple drop-in replacement for "each" on those occasions when you need to iterate over a hash or an array.

That is, if $data is a hash, and you're happily doing something like:

  while (my ($k, $v) = each %$data) {
      # ...

but then decide that you also want to loop over $data in the event that it's an array, you can do:

  my $iter = eacherator($data);

  while (my ($k, $v) = $iter->()) {
      # ...

(You may wish to use this package if, for example, you have a module that happily iterates over a hash, but then discover that you also need to iterate over an "ordered" hash--in this case you can just switch curly brackets to square brackets and use eacherator() to generate a drop-in replacement for each.)


$iter_fn = eacherator($hash_or_array_ref)

Returns a function (closure) that behaves like "each".


Not tested; it's probably quite a bit slower than regular "each" on hashes, though.


If you need something more sophisticated, or something with similar--but different--behaviour, try Data::Iter, Data::Iterator, Array::Each or Object::Iterate. (All of these generate iterators (some with more each-like semantics than others), but none are indifferent as to whether they receive a hash or array.)

Depending on what you're trying to do, Maptastic may also be useful.


Michael Stillwell <>