🟦 Learn Go (Golang) – Daily Series

📑 Table of Contents — Go Lang Daily Series

A clean, structured learning path from basics to advanced Go programming.

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🟦 01. Getting Started with Go

• What is Go?
• Why Go? (Speed, Concurrency, Simplicity)
• Install Go (Windows / Mac / Linux)
• VS Code Setup + Extensions
• GOPATH vs GOROOT Explained
• Running Go Programs (run/build)

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🟩 02. Go Fundamentals

• Hello World
• Comments & Formatting (gofmt)
• Variables (var, short declarations)
• Constants (iota)
• Data Types (int, float, string, bool)
• Type Conversion
• Operators (Arithmetic, Logical, Comparison)

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🟨 03. Strings & Formatting

• String functions
• Rune vs Byte
• String formatting (fmt.Printf, Sprintf)
• Multi-line strings

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🟪 04. Control Flow

• if / else
• switch (value & type)
• for loops (range, conditions)
• break, continue
• defer keyword (important)

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🟥 05. Functions

• Basic functions
• Named return values
• Multiple returns
• Variadic functions
• Anonymous functions
• Closures
• Higher-order functions

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🟫 06. Packages, Modules & Workspaces

• What is a module?
• go.mod explained
• Importing packages
• Creating your own package
• Multi-module workspace (Go 1.18+)

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🟦 07. Core Data Structures

• Arrays
• Slices (make, append, capacity)
• Maps (CRUD)
• Copying slices & maps
• Deep vs shallow copy

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🟩 08. Structs & Methods

• Structs basics
• Embedding (Go’s inheritance)
• Methods (value & pointer receivers)
• Custom types
• JSON Marshalling & Unmarshalling

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🟨 09. Pointers

• Pointer basics
• Pointer arithmetic (why Go doesn’t allow)
• Pointer receivers vs value receivers

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🟪 10. Interfaces (Go’s Polymorphism)

• Empty interface (any)
• Type assertions
• Type switches
• Dependency injection pattern

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🟥 11. Error Handling

• error type
• Custom errors
• Wrapping errors
• Panic, Recover
• Best error handling practices

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🟫 12. Go Generics (Go 1.18+)

• Type parameters
• Generic functions
• Generic structs
• Constraints
• Real-use cases

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🟦 13. Concurrency (Go’s Superpower)

• What is concurrency?
• Goroutines
• Buffered & Unbuffered Channels
• Channel directions
• Select statement
• WaitGroups
• Mutex & RWMutex
• Deadlocks & Race Conditions

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🟩 14. Advanced Concurrency Patterns

• Fan-in / Fan-out
• Worker pools
• Pipelines
• Context cancellation
• Rate limiting
• Timeouts
• Sync package
• Atomic operations

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🟨 15. File Handling

• Read/Write files
• Create/Delete files
• Buffer readers
• Working with JSON/YAML/TOML files

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🟪 16. Networking in Go

• HTTP servers (net/http)
• HTTP clients
• Handling requests/responses
• Middleware patterns

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🟥 17. Building Real-world APIs

• REST API structure
• Routing (mux, echo, gin)
• Controllers & services
• DTOs
• Validation
• Error handling patterns

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🟫 18. Databases in Go

• SQL (MySQL, Postgres)
• Querying databases
• Prepared statements
• ORM (GORM)
• NoSQL (MongoDB driver)

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🟦 19. Testing in Go

• Unit testing (testing package)
• Benchmarks
• Table-driven tests
• Mocking
• Coverage reports

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🟩 20. Projects & Real-World Go

• To-do CLI tool
• Weather API
• REST API with database
• URL shortener
• Authentication system (JWT)
• Concurrency-based projects

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🟨 21. DevOps + Deployment

• Build binaries
• Dockerizing Go apps
• Docker multi-stage builds
• Deploying to Render / Railway / EC2
• CI/CD basics

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🟪 22. Tools & Utilities

• go vet
• go fmt
• go env
• go build / run / install
• go test
• go mod tidy

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🟧 Appendix

• Go coding style guide
• Best practices
• Recommended books
• Official resources
• Next steps in Go

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🟦 Day 1 – What is Go?

Go (Golang) is a modern programming language created at Google.
Its development began in 2007, and it was open-sourced in 2009.

Go was created with one clear objective:

Make programming simple, fast, and reliable without unnecessary complexity.

It blends:

• the performance & safety of compiled languages like C/C++,
• with the ease & flexibility of dynamic languages like Python.

Because of this, Go is clean, minimal, and excellent for building fast, scalable applications—especially on multi-core systems.

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⭐ Why Should You Learn Go?

1) Beginner-Friendly

Go is extremely easy to learn.
Its syntax is minimal and beginner-friendly, and the tools are powerful yet simple.

2) Fast & Efficient

Go compiles down to machine code.
This makes it extremely fast—perfect for distributed systems like:

• Kubernetes
• Docker
• Cloudflare

3) Simple but Powerful

Go has only 25 keywords, yet provides powerful features like:

• interfaces
• fast concurrency
• strong typing

4) Amazing Career Opportunities

Go is rapidly growing across startups, cloud platforms, DevOps tools, and enterprises.
Go developers are highly in demand with strong salaries.

Popular use cases:

• Backend systems
• Microservices
• DevOps tooling
• Cloud engineering
• High-performance systems

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⭐ Why Go Was Created

Go was created to fix limitations in older languages:

1. Slow compilation (like C++)
2. Overly complex codebases
3. Weak concurrency models

Go solves these problems by offering:

• very fast compilation
• clean & readable syntax
• built-in concurrency (goroutines)
• single-binary deployment

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🟨 Key Features of Go

• Simple syntax (only 25 keywords)
• C-level performance
• Memory efficient
• Built-in concurrency (goroutines)
• Easy deployment (single binary)
• Cross-platform builds

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🟩 Where is Go Used?

Some of the world’s most powerful tools are written in Go:

• Docker
• Kubernetes
• Grafana
• Terraform
• Cloudflare
• Uber’s backend

Go is the top choice for:

• DevOps
• Cloud systems
• Distributed systems
• Scalable backends

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🟩 Ready to Begin?

This marks the official start of your Go learning journey.
Let's continue building — step by step.

🔔 New topics + daily content updates will be added automatically.