go-sample

A personal collection of small, self-contained Go samples that exercise language features, the standard library, third-party libraries, and surrounding middleware. Each top-level directory is an independent topic that can be run on its own with minimal setup.

Module: github.com/jun06t/go-sample (Go 1.24)

Index

Language / Tooling

Directory	Description
cli-interface	Building a CLI with the flag package (uppercase converter)
cfs	Concurrent prime search used as a runtime-tracing demo
pipe	A head-like tool driven by Unix-style stdin pipes
unix	HTTP server over a Unix domain socket
shutdown-hook	Graceful shutdown triggered by OS signals
modules	Go Modules basics
toolchain / toolchain-library	Experiments with the toolchain directive in go.mod
go-cmp	Struct comparison and mock generation with google/go-cmp
yaml	YAML parsing with environment-variable expansion

HTTP / Networking

Directory	Description
http2	HTTP/2 server and client behavior
keep-alive	Verifying HTTP keep-alive behavior
sse	Server-Sent Events server and client
compress	Response compression with memory profiling
request-body	(placeholder)
error-middleware	HTTP error-handling middleware
log-response	Capturing HTTP responses via middleware

Logging / Observability

Directory	Description
zap	uber-go/zap configuration and multi-output examples
log-masking	Masking sensitive fields in log output

Datastores

Directory	Description
bigtable	Cloud Bigtable client with App Profile usage
preparedstatement	PostgreSQL prepared-statement performance comparison
nested-mongo-document	Nested MongoDB documents (including BSON flattening)
causal-consistency	MongoDB causal consistency (read-your-writes)
distributed-lock	Distributed locking with etcd
firebase	Firebase backend with a Vue.js front end

Security / Authorization / Feature Flags

Directory	Description
crypto	AES-GCM encryption and Argon2 hashing
open-policy-agent	Policy evaluation with OPA
openfga	ReBAC authorization with OpenFGA
openfeature	Feature-flag management with OpenFeature
pgv	Protocol Buffers validation with protoc-gen-validate

Algorithms / Data Structures

Directory	Description
bandit	Multi-armed bandit (Thompson sampling)
bloomfilter	Bloom filter
radix-tree	Radix tree vs. regex path-matching benchmark
weighted-random-choice	Weighted random selection
guid	UUID vs. Sonyflake vs. xid generation benchmark

DI / Plugins

Directory	Description
wire	Dependency injection with Google Wire (struct / interface / packages variants)
go-plugin-rpc	RPC-based plugins via hashicorp/go-plugin

Usage

Each directory has its own entry point and can typically be run with go run or go test from inside it.

cd radix-tree
go test -bench . -benchmem

Samples that depend on external middleware (PostgreSQL, MongoDB, etcd, Bigtable, etc.) carry their own README and/or docker-compose.yml in the subdirectory.

License

MIT