Re: building "path expressions"

Jeff Higgins <jeff@invalid.invalid>
Thu, 23 Jan 2014 16:11:36 -0500
On 01/23/2014 03:27 PM, Jeff Higgins wrote:

On 01/23/2014 11:37 AM, Stefan Ram wrote:

   When creating an interface for a library, sometimes one wants the user
   to see nesting in a ?path expression?, like for example
   to convey the idea that h is a part of g, which is a part of f, and
so on.

Do you have an example using some real world names to help me understand?
Can the names help the user to visualize the nesting, or is some other
markup required?
I'm drawing a complete blank here.

   I think it is funny that one can use either package names /or/ nested
   classes /or/ fields to implement such a path, without this choice
   visible in the ?path expression?. For example, one posssibility to
   implement a ?path expression? ?a.b.c.d.e.f.g.h? might be:

package a.b.c;
class G { int h = 8; }
class F { G g = new G(); }
class d { static class e { static F f = new F(); }}
public final class Main
{ public static void main( String[] args )
   { java.lang.System.out.println( a.b.c.d.e.f.g.h ); }}


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