prefer_iterable_whereType

Learn about the prefer_iterable_whereType linter rule.

Stable

Core

Fix available

Prefer to use whereType on iterable.

PREFER iterable.whereType<T>() over iterable.where((e) => e is T).

BAD:

dart

iterable.where((e) => e is MyClass);

GOOD:

dart

iterable.whereType<MyClass>();

To enable the prefer_iterable_whereType rule, add prefer_iterable_whereType under linter > rules in your analysis_options.yaml file:

analysis_options.yaml

yaml

linter:  rules:  - prefer_iterable_whereType

If you're instead using the YAML map syntax to configure linter rules, add prefer_iterable_whereType: true under linter > rules:

analysis_options.yaml

yaml

linter:  rules:  prefer_iterable_whereType: true

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