This guide introduces CEL-PHP, a high‑performance, non‑Turing‑complete expression engine for PHP 8+, showing how to install it, evaluate simple and contextual expressions, handle parsing and optimization, integrate caching, register custom functions, and avoid common pitfalls for robust backend rule evaluation.
This article introduces Spring Expression Language (SpEL) for Spring Boot 3, explains its core features such as collection filtering, projection, Elvis and safe navigation operators, method and bean references, regular‑expression handling, and arithmetic expressions, and provides complete runnable code examples demonstrating each technique.
Jakarta EE 10 requires Java 11 (with optional Java 17 support) and brings a mix of minor and major updates across dozens of specifications, including new versions of Authentication, Concurrency, CDI, EL, JSON Binding, Security, Server Faces, Standard Tag Library, SOAP with Attachments, XML Binding, and a streamlined Core Profile for microservices.
This article introduces and compares several Java expression engines—including Spring Expression Language, OGNL, Aviator, MVEL, and Hutool's expression facade—detailing their key features, typical use cases, security considerations, and providing utility class examples with code snippets for each engine.
An in‑depth guide to Spring Expression Language (SpEL) covering its core features, evaluation contexts, parser configuration, collection handling, operators, variables, bean references, and a practical AOP case study, all illustrated with concise Java code examples.
The article explains Baidu's Janus gateway—its motivations, three‑level routing design, variable and condition expression language, plugin implementations for disaster recovery and caching, and performance benchmarks—showing how it supports millions of QPS while remaining flexible and efficient.
This article introduces Spring Expression Language (SpEL), explains its common syntax, demonstrates quick-start examples, shows real-world usage with AOP monitoring, and outlines its internal implementation, providing a concise guide for backend developers working with Spring.
This article walks through the complete process of designing a simple domain‑specific expression language, defining its grammar, generating a lexer and parser with ANTLR, implementing an AST visitor in Java, and integrating the engine into a Java project.
This article provides a comprehensive overview of Spring Expression Language (SpEL), detailing its supported expression types, case‑insensitive keywords, step‑by‑step usage flow, core interfaces, and concrete code examples for literals, arithmetic, relational, logical, ternary, Elvis, variable handling, and property navigation.
