Chain

Chain of Responsibility Pattern

A behavioral pattern that passes a request along a chain of handlers until one of them handles it, decoupling senders from receivers.

Django Middleware

Understand how Django middleware intercepts every request and response to implement cross-cutting concerns like authentication, security headers, and logging.

The Resolver Chain and Context

Understand how resolvers link together into a chain across the query tree and how the shared context object flows through that chain.

Matrix Chain Multiplication

Determine the optimal parenthesization to minimize scalar multiplications when multiplying a chain of matrices, in O(n^3).

Java Spring Security Cheat Sheet

Covers Spring Security filter chain configuration, password encoding, method-level authorization, and JWT resource server setup for securing APIs.