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my @elems = ("x", "y", "z"); # array size may be varied (lesser or more than 3)
my @tobepopulated = ("foo", "foo", "foo", "foo", "foo", "foo", "foo", +"foo", "foo", "foo"); # this can be more 10 elements
my @new_array = ... "foo-z", "foo-z", "foo-z");