calebthompson/cartographer — comment on commit 221c8f68ec3e0fffe0d21e5384d68ca5db07f85c
File: docs/spec/prototype.json line 4
By KyleCartmell:

I like the explicitness of an empty array. When I read through the thing, once I find it and see empty set I can stop reading. Otherwise, I have to read /everything/ to ensure that it does not appear.

But I'm not married to this.