During a focused month contributing to apache/echarts, this developer improved the clarity and accuracy of data iteration documentation by updating the each() method examples in both DataStore.ts and SeriesData.ts. Using TypeScript, they delivered a targeted fix that demonstrated correct usage of numerical indices and arrays, ensuring the examples aligned with the method’s intended API. Their work emphasized code example precision and documentation quality, directly addressing potential misusage and enhancing onboarding for new contributors. By adhering to repository conventions and coding standards, the developer strengthened API consistency and maintainability, providing a reproducible reference point for future development and contributor education.