Fail Fast — Don't Ignore Errors

Silently swallowing errors hides bugs and makes debugging a nightmare.

// dirty — errors are swallowed
function solve(json) {
  try {
    return JSON.parse(json);
  } catch (e) {
    return null; // swallowed — caller has no idea what went wrong
  }
}

Refactor solve(json) so failure is never silent: on success return { ok: true, value: <parsed> }, on failure return { ok: false, error: 'Invalid JSON' } — never a bare null that hides which case happened.