prefer_conditional_assignment

Prefer using ??= over testing for null.

This rule is available as of Dart 2.0.

Rule sets: recommended, flutter

This rule has a quick fix available.

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);
}

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

除非另有说明，文档之所提及适用于 Dart 3.5.4 版本，本页面最后更新时间: 2024-08-02。 查看文档源码 或者 报告页面问题。