map

# given {1..4}

$hash->map(sub {
    shift + 1
});

The map method iterates over each key/value in the hash, executing the code reference supplied in the argument, passing the routine the value at the current position in the loop and returning a new hash reference containing the elements for which the argument returns a value or non-empty list. This method returns a Data::Object::Hash object.

map(CodeRef $arg1, Any $arg2) : ArrayObject

method