prefer_conditional_assignment

Prefer using ??= over testing for null.

This rule is available as of Dart 2.0.0.

Rule sets: recommended, flutter

This rule has a quick fix available.

Details

PREFER using ??= over testing for null.

As Dart has the ??= operator, it is advisable to use it where applicable to improve the brevity of your code.

BAD:

String get fullName {
  if (_fullName == null) {
    _fullName = getFullUserName(this);
  }
  return _fullName;
}

GOOD:

String get fullName {
  return _fullName ??= getFullUserName(this);
}

Usage

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

linter:
  rules:
    - prefer_conditional_assignment