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no-equal-conditions

added in: 1.1.0
warning
Pro+
preset: recommended

Warns when a if statement has duplicate conditions.

Duplicate conditions are usually a sign of a bug (another condition should be used instead) or just dead code that can be simply removed.

Example​

❌ Bad:

void main() {
  final value = 1;

  if (value == 1) {
    return value;
  } else if (value == 2) {
    return value;
    // LINT: Avoid duplicate conditions in 'if/else if'. Try replacing the duplicate condition or removing it.
  } else if (value == 1) {
    return value;
  }
}

✅ Good:

void main() {
  final value = 1;

  if (value == 1) {
    return value;
  } else if (value == 2) {
    return value;
  } else if (value == 3) {
    return value;
  }
}

Additional Resources​