Category:J examples needing attention

These J examples need attention. They may be incorrect, poorly-written or in some other way unsatisfactory in their current state on their current page. If you know J, take a look at them and see if there's something you can do. The people best suited for ensuring the quality of J examples on Rosetta Code are the people who know the language. If that's you, we'd appreciate it if you would lend a hand.