Official Didi technology account
This article explores how AI‑enhanced IDEs can transform front‑end development by streamlining requirement analysis, technical design, UI automation, code refactoring, test generation, and code review, offering concrete prompts, workflow tips, and best practices to dramatically improve efficiency and code quality.
Explore how the Bellman equation underpins reinforcement learning, comparing Dynamic Programming, Monte Carlo, and Temporal‑Difference methods, and discover why TD’s low‑variance, online updates make it a powerful bridge between model‑based planning and sample‑based learning.
This article deeply explores the ordered consumption mechanisms of RocketMQ and its derivative DDMQ, explaining the implementation differences, source‑code details of sequential sending, broker locking, client‑side processing, and compares the two systems' approaches to guarantee message order.
HUATUO, Didi's open‑source cloud‑native observability project, leverages BPF‑based low‑overhead kernel tracing, unified metric and event frameworks, automatic flame‑graph generation, and seamless integration with Prometheus, Grafana and Elasticsearch to provide panoramic, zero‑intrusive monitoring and continuous performance profiling for complex production environments.
This article presents a unified framework for efficiently estimating causal treatment effects on exponential‑family outcomes, extending target regularization beyond Gaussian assumptions, deriving bias analysis for plug‑in estimators, proposing DR and TMLE‑based estimators, and validating them on synthetic and real datasets.
This article presents a data‑fusion framework that combines long‑term observational data and short‑term randomized experiments to identify and estimate long‑term heterogeneous dose‑response curves under continuous treatments and unobserved confounders, using reweighting, optimal transport, and balanced representation learning.
This article explains the challenges of evaluating uplift models for intelligent marketing with multiple discount treatments, reviews existing metrics such as AUUC, Qini, and AUCC, and introduces the RAS‑AUCC metric that aligns offline evaluation with online ROI by sorting samples by marginal ROI and using RCT data.
This article explains why unit testing is essential for code quality, API design, and documentation, then walks through Go's built‑in testing conventions, common *testing.T methods, table‑driven test patterns, mocking with gomonkey, and best practices for writing maintainable tests.
Dimina, Didi’s newly open‑sourced mini‑program framework, combines Vue 3 with a custom compiler to translate mini‑program syntax into native apps, offering a modular, high‑performance, cross‑platform solution that lets developers write a single codebase for Android, iOS, Harmony, and Web, complete with extensive component and API libraries.
This article surveys the evolution of AI applications, explains large language model fundamentals, outlines architectural challenges, and introduces three core patterns—Retrieval‑Augmented Generation (RAG), autonomous Agents, and Model Context Protocol (MCP)—while providing practical LangChain code snippets and integration guidance.
