From all the answers you got, the one from Athanasius
was IMHO the best so far.
It's elementary for Perl that @arrays and %hashes are flattened in list context, not only in the case of a foreach (LIST), but whenever the docs talk about "LIST" as parameter.
from perldata#List value constructors
LISTs do automatic interpolation of sublists. That is, when a LIST is evaluated, each element of the list is evaluated in list context, and the resulting list value is interpolated into LIST just as if each individual element were a member of LIST. Thus arrays and hashes lose their identity in a LIST--the list
contains all the elements of @foo followed by all the elements of @bar, followed by all the elements returned by the subroutine named SomeSub called in list context, followed by the key/value pairs of %glarch.
=> (1, 2, 3)
=> ("a", "b", "c")
=> (1, 2, 3, "a", "b", "c")
( addicted to the Perl Programming Language)
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