Top "Is-empty" questions

Questions about items that can be described as empty or having no data value

Why use null function instead of == [] to check for empty list in Haskell?

I am reading through the "Starting Out" chapter of Learn You a Haskell for Great Good!. It says: null checks …

list haskell is-empty empty-list
Why does json_encode return empty?

I have a problem with my script which request records from database by AJAX, and then return it back via …

php json ajax is-empty jsonresult