Map functions

The following code works in Allegro:

 mapcan(lambda((c) c) mapcar(lambda((b) car(b)) '(((1 2) 3)((4 5) 6)((7 8) 9))))

It returns (1 2 4 5 7 8) as predicted.

Your nested net function also works in Allegro 16.2.

eDave said:

 mapcan(lambda((c) c) mapcar(lambda((b) car(b)) '(((1 2) 3)((4 5) 6)((7 8) 9))))

Dave, this works for me as well.

I'm not sure what's going on. If I select a net with more then 1 branch and then execute the command it runs fine the first time. If I execute it a second time it locks up APD. If I select a net with only 1 branch it runs multiple times, no problem.  

 EDIT: behaves the same way in Allegro 16.01 XL

Oh yes.

I see the same thing in Allegro with a multi-branch net but not with the above example.

I'm not sure what would cause this.

Dave

So I believe I've figured out what the heck is going on (although it doesn't make sense)!

Using Dave's example (broken down):

mylist =  '(((1 2) 3)((4 5) 6)((7 8) 9))

newlist = mapcar(lambda((b) car(b)) mylist)

At this point:

mylist =  '(((1 2) 3)((4 5) 6)((7 8) 9)); this is correct

newlist = '((1 2) (4 5) (7 8)); this is correct

All is good until:

flatlist = mapcan(lambda((c) c) newlist)

flatlist = '(1 2 4 5 7 8); this is correct

newlist = '(((1 2 4 5 7 8) (4 5 7 8)  (7 8)); I beleive this is correct since mapcan uses the destructive function nconc.

mylist = '(((1 2 4 5 7 8) 3) ((4 5 7 8) 6) ((7 8) 9)); this is what's confusing. why has mylist been modified??

This brings me to my original problem:

children =  mapcan(lambda((c) c) mapcar(lambda((b) b->children) net->branches))

This command is actually destructively replacing the children in the net branch structure. This is the reason, I believe, the tool is hanging. The next time you try to access the net dbid structure everything is out of wack. The bad structure is not saved when you save the design, luckily.