On Friday, 27 July 2012 at 22:38:46 UTC, Dmitry Olshansky wrote:
On 27-Jul-12 22:58, Stuart wrote:
Well, off the top of my head, you could use something like:
Public Iterator Function AllFiles(RootDirectory As String)
As
IEnumerable(Of String)
Dim Roots As New Queue(Of String) From {RootDirectory}
While Roots.Any
Dim Root = Roots.Pop
Roots.AddRange(IO.Directory.GetDirectories(Root))
For Each Filename in IO.Directory.GetFiles(Root)
Yield Filename
Next
End While
End Function
Then it's not in anyway better then ranges.
I assume you mean "any way" - "anyway" has a different meaning.
And I don't know much about ranges, because there's very little
documentation. But as I understand it, for ranges I'd need to
write a whole new class. Here, I'm writing a SINGLE FUNCTION in
standard imperative style.
You again maintain stack (or queue, whatever).
There is a difference between recursion (stack) and state
variables. To claim that my function is recursive is sheer
nonsense. Recursion is costlier than a local queue.
