Pattern: Missing use of isEmpty/isNotEmpty
Issue: -
The Iterable contract does not require that a collection know its length or be
able to provide it in constant time. Calling length just to see if the
collection contains anything can be slow.
Instead, there are faster and more readable getters: isEmpty and
isNotEmpty. Use the one that doesn't require you to negate the result.
Example of correct code:
if (lunchBox.isEmpty) return 'so hungry...';
if (words.isNotEmpty) return words.join(' ');Example of incorrect code:
if (lunchBox.length == 0) return 'so hungry...';
if (words.length != 0) return words.join(' ');