avoid-self-compare

added in: 1.1.0

warning

preset: recommended

Warns when a comparison has both sides exactly the same.

Example

❌ Bad:

void main() {
  final val = '1';

  // LINT
  if (val == val) {
    return;
  }

  // LINT
  if (val.length == val.length) {
    return;
  }

  // LINT
  if (val > val) {
    return;
  }

  // LINT
  if (val < val) {
    return;
  }
}

✅ Good:

void main() {
  final val = '1';
  final anotherVal = '2';

  if (val == anotherVal) {
    return;
  }

  if (val.length == anotherVal.length) {
    return;
  }

  if (val > anotherVal) {
    return;
  }

  if (val < anotherVal) {
    return;
  }
}