array.difference(array) → array
Remove the elements of one array from another array.
Example: Retrieve Iron Man’s equipment list without boots.
r.table('marvel').get('IronMan')['equipment'].difference(['Boots']).run(conn)
Example: Remove Iron Man’s boots from his equipment.
r.table('marvel').get('IronMan')['equipment'].update(lambda doc:
{'equipment': doc['equipment'].difference(['Boots'])}
).run(conn)
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