Demo How to Comment on a Posted Link to a Line or Lines of Code From a File

// Buggy example: mutates the array while iterating and may cause exponential growth
switch (type) {
  case 'multiBall':
    if (gameState.balls.length < 5) {
      gameState.balls.forEach(ball => {
        gameState.balls.push({ ...ball });
      });
    }
    // Add two new balls with slightly different trajectories
    gameState.balls.push({ ...gameState.balls[0], dx: gameState.balls[0].dx });
    gameState.balls.push({ ...gameState.balls[0], dy: Math.abs(gameState.balls[0].dy) });
    gameState.powerups.multiBall.active = true;
    gameState.powerups.multiBall.activationTime = currentTime;
    break;
}

function activatePowerUp(type) {
  switch (type) {
    case 'multiBall': {
      // Only add new balls if we have fewer than 4 (prevents excessive growth)
      if (gameState.balls.length < 4) {
        // Use a base ball to create new balls, don't mutate during iteration
        const base = gameState.balls[0];
        gameState.balls.push({ ...base, dx: -base.dx });                // mirrored dx
        gameState.balls.push({ ...base, dy: Math.abs(base.dy) });      // ensure positive dy
        gameState.powerups.multiBall.active = true;
        gameState.powerups.multiBall.activationTime = currentTime;
      }
      break;
    }
    default:
      break;
  }
}

# Stage your change
git add path/to/file.js

# Commit with a message that references the issue or describes the change
git commit -m "Ref #1: Prevent exponential ball growth on multi-ball pickup"

# Push the changes to the branch tied to the pull request
git push origin your-branch-name

// The updated portion in the PR reflects the new guard and non-mutative additions
switch (type) {
  case 'multiBall': {
    // Guard to prevent excessive balls
    if (gameState.balls.length < 4) {
      const base = gameState.balls[0];
      // Create new balls from a snapshot of an existing ball — don't iterate and mutate
      gameState.balls.push({ ...base, dx: -base.dx });
      gameState.balls.push({ ...base, dy: Math.abs(base.dy) });
      gameState.powerups.multiBall.active = true;
      gameState.powerups.multiBall.activationTime = currentTime;
    }
    break;
  }
  default:
    break;
}