BranchDuplicate

Detector that reports duplicated code in conditional branches.

Why is it bad?

Duplicated code in branches is bad because it:

1. Reduces Readability: Repetition makes the code harder to understand.
2. Increases Maintenance: Changes must be made in multiple places, risking errors.
3. Signals Poor Design: It suggests missed opportunities for cleaner, more abstract code.

Example

if (a > 42) {
  a = 43; // bad: duplicated code
} else {
  a = 43;
}

Use instead:

if (a > 42) {
  a = inc(b); // ok
} else {
  a = 43;
}