ZCY Technology Team (Zero), based in Hangzhou, is a growth-oriented team passionate about technology and craftsmanship. With around 500 members, we are building comprehensive engineering, project management, and talent development systems. We are committed to innovation and creating a cloud service ecosystem for government and enterprise procurement. We look forward to your joining us.
This article introduces graph databases, explains Dgraph concepts and installation via Docker, details Dgraph4j Java client usage including schema setup, querying, mutations, and data monitoring, and explores applications such as equity relationship analysis and data visualization.
This article explains what test cases are, their objectives, essential components, execution process, and the three core principles—accuracy, conciseness, and completeness—that guide the creation of high‑quality, maintainable test cases for reliable software testing.
This article explains the fundamentals of B‑Tree and B+Tree data structures, their search algorithms, and how MySQL's MyISAM and InnoDB storage engines implement these indexes to achieve efficient disk‑based query performance.
This article explains the definitions, characteristics, and overflow cases of sequential and circular queues and stacks, provides Java implementations for these data structures, demonstrates their usage with sample code and results, and discusses practical applications of queue thinking in database-driven workflows.
This article explains MySQL's binary log (binlog), a binary format file that records SQL statements for database updates, its role in master-slave replication, crash recovery, and detailed implementation mechanisms including cache management and event writing processes.
This article explains how Java achieves "write once, run anywhere" through platform‑independent bytecode, describes the .class file structure, introduces tools for viewing bytecode, and provides detailed guidance on using the ASM library’s Core and Tree APIs for bytecode enhancement, including practical code demos and application scenarios.
This article explains the concepts, use‑cases, and performance trade‑offs of controlled versus uncontrolled forms in React, demonstrates how Ant Design 3 and 4 implement form handling with HOC or Context + hooks, and introduces the lightweight, non‑controlled approach of react‑hook‑form with practical code examples.
This article explains MyBatis's first‑level and second‑level cache mechanisms, illustrates common consistency problems caused by default cache settings in both distributed and single‑session scenarios, and provides practical recommendations such as adjusting localCacheScope or deep‑copying results to avoid cache pitfalls.
This article explains the fundamental concepts of search engine technology—including forward and inverted indexes, tokenizers, stop words, synonym handling, ranking algorithms, and NLP integration—and provides a concise Go implementation with code examples and performance testing.
This article explains the various lock types in MySQL—including global, table, row, metadata, and intent locks—how they work under InnoDB, demonstrates lock acquisition with SQL examples, and provides practical guidance for detecting and resolving deadlocks in production environments.
