prefer_is_not_empty
Use isNotEmpty
for Iterables and Maps.
This rule is available as of Dart 2.0.0.
Rule sets: core, recommended, flutter
This rule has a quick fix available.
Details
#PREFER x.isNotEmpty
to !x.isEmpty
for Iterable
and Map
instances.
When testing whether an iterable or map is empty, prefer isNotEmpty
over !isEmpty
to improve code readability.
BAD:
dart
if (!sources.isEmpty) {
process(sources);
}
GOOD:
dart
if (todo.isNotEmpty) {
sendResults(request, todo.isEmpty);
}
Usage
#To enable the prefer_is_not_empty
rule, add prefer_is_not_empty
under linter > rules in your analysis_options.yaml
file:
analysis_options.yaml
yaml
linter:
rules:
- prefer_is_not_empty