Golang Learning Workspace

This repository is a collection of small Go programs, exercises, and experiments. Use the topic blocks below to find where a concept lives.

100 Go Mistakes

Folder	Summary
100_go_mistakes/	Collection of small examples based on common Go pitfalls.
100_go_mistakes/embedding/	Embedding vs named fields; mutex exposure; io.WriteCloser embedding.
100_go_mistakes/embedding/embed/	Types used by the embedding example.
100_go_mistakes/errors/	Error wrapping, custom error types, and errors.Join/Is/As usage.
100_go_mistakes/errors/defer_error/	Deferred error handling and error joining.
100_go_mistakes/init_functions/	init ordering and sync.Once alternatives.
100_go_mistakes/init_functions/main/	Main package demonstrating init order.
100_go_mistakes/init_functions/redis/	Sample package with init hook.
100_go_mistakes/loop_array_pt/	Range loop pointer aliasing pitfalls.
100_go_mistakes/shadowing_variables/	Variable shadowing examples and fixes.

Composite Types

Folder	Summary
compositetypes/	Entry point for arrays, slices, maps, and structs.
compositetypes/arrays/	Array basics, comparisons, and keyed elements.
compositetypes/arrays/challenge1/	Mood message exercise.
compositetypes/arrays/digitalclock/	ASCII digital clock and digit definitions.
compositetypes/maps/	Map creation, lookup, and deletion patterns.
compositetypes/maps/maps2/	Nested maps/slices and sorting.
compositetypes/maps/proyect/	Regex cleanup and parsing experiment.
compositetypes/slices/	Slice basics, append, capacity, sorting, and filtering.
compositetypes/slices/bouncingball/	Terminal animation using a rune buffer.
compositetypes/slices/filefinder/	Finds empty files and writes their names.
compositetypes/slices/filefinder/files/	Sample files for the filefinder example.
compositetypes/slices/go1-23-slices-maps/	Go 1.23 slices/maps/iter sequence helpers.
compositetypes/slices/slices2/	Backing array and capacity deep dive.
compositetypes/slices/slices3/	Full slice expressions, make/copy, and spinner.
compositetypes/slices/slicespractice/	Slice capacity exercises and memory reporting.
compositetypes/slices/slicespractice/api/	Helpers for large slice allocation and mem stats.
compositetypes/structs/	Struct basics, embedding, and comparisons.
compositetypes/structs/exercises/	CLI exercise with JSON marshaling.
compositetypes/structs/newlib/	Exported vs unexported fields and constructors.
compositetypes/structs/structs2/	Embedded structs, JSON tags, and permissions map.

Concurrency

Folder	Summary
concurrency/	Concurrency patterns, channels, and sync primitives.
concurrency/atomic/	Atomic counter example.
concurrency/bytest/	Website checker with tests and benchmarks.
concurrency/contextpackage/	Context usage patterns.
concurrency/contextpackage/withcancel/	Cancelable context and generator.
concurrency/contextpackage/withdeadline/	Deadlines and ctx.Err handling.
concurrency/contextpackage/withtimeout/	HTTP request with context timeout.
concurrency/contextpackage/withvalue/	Context values for request data.
concurrency/datarace/	Data race examples and fixes.
concurrency/exampleapp/	Link checker using channels.
concurrency/exampleapp/exampleapp2/	Buffered channel link checker.
concurrency/exampleapp/exampleapp3/	WaitGroup link checker.
concurrency/exampleapp/sumarray/	Parallel sum of random arrays.
concurrency/fan_in/	Fan-in channel merge example.
concurrency/goroutines/	Goroutine and channel basics.
concurrency/goroutines/bufferedchannels/	Buffered channel behavior.
concurrency/goroutines/channeldirections/	Send-only and receive-only channels.
concurrency/goroutines/channelownership/	Channel ownership pattern and filter.
concurrency/goroutines/channels/	Basic channel send/close semantics.
concurrency/goroutines/client/	TCP client for server demo.
concurrency/goroutines/closure/	Closure capture in goroutines and Fibonacci.
concurrency/goroutines/rangechannels/	Ranging over channels with close.
concurrency/goroutines/select/	Select over multiple channels.
concurrency/goroutines/server/	TCP server that writes responses.
concurrency/goroutines/timeouts/	Timeouts and non-blocking select.
concurrency/goroutines/waitgroup/	WaitGroup usage and worker example.
concurrency/lgowithtests/	Learn Go with Tests website checker.
concurrency/mutex/	Mutex-protected deposit/withdraw example.
concurrency/pipelines/	Generator -> square pipeline example.
concurrency/pipelines/new_pipe_example/	Context-aware pipeline with semaphores and merge.
concurrency/pipelines/scalepipeline/	Fan-out/fan-in pipeline with workers.
concurrency/syncpool/	sync.Pool with bytes.Buffer reuse.
concurrency/ticker/	Placeholder for ticker examples.
concurrency/timer/	time.NewTimer usage and stopping timers.
concurrency/worker_pool/	Worker pool with job queue and results.

Interfaces and Generics

Folder	Summary
interfaces/	Interface-based store and type assertions.
interfaces/betteruseofinterfaces/	Stringer/sort/json usage with custom types.
interfaces/emptyinterface/	interface{} examples and type assertions.
interfaces/example/	Density interface for metals and gases.
interfaces/writer/	io.Writer example and container/list usage.
generics/	Generic functions and type constraints.
generics/basics/	Bubble sort, map keys, and linked list.
generics/basics/advanced/	Generic map/filter/concat examples.
generics/basics/advanced/advanced_2/	Stringer constraints and joiner pattern.
generics/basics/advanced/advanced_3/	Type sets and aggregate function.
generics/basics/advanced/advanced_4/	Generic vector math.

Language Basics and Core Features

Folder	Summary
bitsbytesandtypes/	Numeric types, conversions, durations, and slice copying.
closure/	Closure example with deferred invocation.
constants/	Constants, typeless values, and iota examples.
controlflowerrorhandling/	Control flow and boolean logic examples.
controlflowerrorhandling/errorhandling/	Error handling, parsing, and switch patterns.
expressions/	Basic expressions, runtime info, and library usage.
formatedoutput/	fmt.Printf formatting examples.
functional_options/	Functional options pattern basics.
functional_options/better_functional_options/	Typed options for server/client configs.
functions/	Structs with slices/maps and function semantics.
loops/	For-loop patterns, tables, and spinner.
methods/	Method receivers on book/game and list usage.
numbersandstrings/	Arithmetic, conversions, and string/rune operations.
numbersandstrings/weights/	Weight type aliases.
osinput/	os.Args input handling examples.
packages/	Multi-file package examples.
packages/what/	A simple multi-file package with shared functions.
pointers/	Pointer basics and passing pointers to functions.
pointers/compositetypes/	Pointers with arrays, slices, maps, and structs.
pointers/exercises/	Pointer exercises.
pointers/exercises/second/	Swap values and pointer addresses.
pointers/exercises/third/	Fixing nil pointer initialization.
pointers/exercises/fourth/	Slice of maps initialization exercise.
reflect/	Reflection examples with tags and dynamic field updates.
stringbuilder/	strings.Builder stub.
stringdetailed/	Runes, Unicode iteration, and formatting.
stringdetailed/challenge1/	Placeholder for string challenge.
stringdetailed/stringdetailed2/	String/byte/rune conversions and UTF-8 decoding.
usingmodules/	Minimal module example.
variables/	Variables, path split, and filtering helpers.
variables/typeconversion/	Type conversion examples.
exportlib/	Tiny library exporting a Go version helper.
library/	Shared helper functions used by examples.

Tooling, Config, and Scripts

Folder	Summary
config/	Terminal configuration files (Alacritty, fish, Starship).
tempscripts/	TOML editing script and sample config.

Apps and Experiments

Folder	Summary
logparser/	Parses stdin log lines and prints domain summaries.
randomproy/	Lucky number game and random utilities.
randomproy/wordfinder/	Word lookup using labeled breaks.
sloglogger/	Custom slog handler and misc experiments.
sloglogger/slogtest/	Test-aware slog handler and tests.
sometest/	Third-party helpers (samber/lo, slices).
sqswatermill/	Watermill AWS SQS subscriber example.