I have searched for an answer with out luck. I have a tried a few things without 100% success. The problem is I have a list of directory paths. I want to get a list of paths that are under other paths.

For this list of paths: 
my @paths = (
          'C:\\foo\\bar\\baz',
          'C:\\foo\\bar',
          'C:\\car',
          'C:\\c'
        );

[download]
I want to get back a list like: 
my @nested = (
          'C:\\foo\\bar\\baz'
);

[download]

I tried building a hash of hashes to represent the tree. 
$VAR1 = {
          'C:' => {
                    'c' => {},
                    'car' => {},
                    'foo' => {
                               'bar' => {
                                          'baz' => {}
                                        }
                             }
                  }
        };

[download]

Now I can get the leaf nodes but that ends up being: 
my @nested = (
          'C:\\c',
          'C:\\car',
          'C:\\foo\\bar\\baz'
);

[download]
Maybe I can take the list of paths and remove the list of leaf paths, this gives me the parent list. Then find the children of parents.

Any other suggestions?

In reply to Finding nested directories from a string list. by superfrink

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