Theory is useless without execution. We assemble everything learned across 14 episodes — structs, pointers, error handling, JSON codecs, context timeouts, and concurrency — into a production-grade HTTP REST API.
Go includes a first-class test runner built into the go test CLI. You don’t need external test frameworks like Jest or JUnit to write unit tests, benchmarks, or fuzzers.
Before Go 1.18, writing a reusable function for finding a slice element required duplicate functions for int, string, and float64, or using reflection. Generics solve this using Type Parameters.
When an incoming HTTP request is cancelled by the client, every downstream database query and RPC call associated with that request must stop immediately. Go’s context.Context enforces this cancellation propagation.
Channel communication handles message passing, but shared memory synchronization requires standard primitives like sync.Mutex and sync.WaitGroup. Learn how to build thread-safe concurrent systems.
Do not communicate by sharing memory; instead, share memory by communicating. Goroutines and Channels form the core primitives of Go’s concurrency model.
If it walks like a duck and quacks like a duck, Go treats it like a duck. Interfaces in Go are satisfied implicitly, creating loose coupling and high testability across packages.
Go favors Composition over Inheritance. By embedding structs inside other structs, you automatically promote fields and methods without the rigid coupling of object-oriented class hierarchies.
Go is a pass-by-value language. When you pass an argument to a function, Go creates a copy. Pointers allow you to share memory directly across function boundaries without copying large data structures.
