MY GO EXAMPLES

A place to keep my go examples.

Table of Contents

• ARCHITECTURES
• BLOCKCHAIN
• SCRAPING
• CGO C CODE
• CLIENT/SERVER
• gRPC
• HTTP
• TCP/IP
• CLOUD SERVICE PROVIDERS
• GOOGLE CLOUD PLATFORM
• MICROSOFT AZURE
• COMMON GO
• ERROR REPORTING
• FLAGS
• LOGGING
• MY GENERIC GO TEMPLATE
• TESTING
• CRYPTOGRAPHY
• ASYMMETRIC CRYPTOGRAPHY
• HASHING
• SYMMETRIC CRYPTOGRAPHY
• DATABASES
• NON-RELATIONAL
• RELATIONAL
• FUNCTIONS, METHODS AND INTERFACES
• FUNCTIONS
• METHODS
• INTERFACES
• GO RUNTIME
• GOROUTINES
• INTERACT GO RUNTIME
• INTERACT HOST OS
• INPUT/OUTPUT
• IO READER
• IO WRITER
• IN-PROCESS COMMUNICATION
• SHARED MEMORY
• MESSAGE PASSING
• INTER-PROCESS COMMUNICATION (IPC)
• SHARED MEMORY
• MESSAGE PASSING
• IoT
• RASPBERRY PI
• MODULES AND PACKAGES
• LOCAL PACKAGES
• REMOTE PACKAGES

Documentation and Reference

• My go cheat sheet
• my-go-packages
• my-go-tools
• This repos github webpage built with concourse

ARCHITECTURES

• BLOCKCHAIN

• Coming soon.

• SCRAPING

• Coming soon.

CGO

• C CODE

• simple-c-code

  A very simple example to show you how to write a c function in go.

• simple-c-code-using-stdio

  A c function in go using stdio.h for printf.

CLIENT/SERVER

• gRPC

• Coming soon.

• HTTP

• Coming soon.

• TCP/IP

• Coming soon.

CLOUD SERVICE PROVIDERS

• GOOGLE CLOUD PLATFORM

• Coming soon.

• MICROSOFT AZURE

• Coming soon.

COMMON GO

• ERROR REPORTING

• error-example

  Error Handling using the standard error package.

• FLAGS

• flags

  The standard flag package makes it easy to implement command-line flag parsing.

• LOGGING

• logrus

  Logging using logrus package.

• MY GENERIC GO TEMPLATE

• jeffs-basic-go-template

  A simple go template with flags, logging & error handling.

• TESTING

• Coming soon.

CRYPTOGRAPHY

• ASYMMETRIC CRYPTOGRAPHY (Great for digital signatures (verify sender) and receiving encrypted data)

• Coming soon.

• HASHING (Great for getting fingerprints)

• Coming soon.

• SYMMETRIC CRYPTOGRAPHY (Using the same key to encrypt and decrypt)

• Coming soon.

DATABASES

• NON-RELATIONAL

• Coming soon.

• RELATIONAL

• Coming soon.

FUNCTIONS, METHODS AND INTERFACES

• FUNCTIONS

• functions

  Using functions to calculate the area of a rectangle and circle.

• functions-pointers-arguments

  Using functions to calculate the area of a rectangle and circle by passing pointers.

• METHODS

• methods

  Using methods to calculate the area of a rectangle and circle.

• methods-pointers-arguments

  Using methods to calculate the area of a rectangle and circle by passing pointers.

• methods-pointers-receivers

  Using methods to calculate the area of a rectangle and circle by passing pointers and using pointer receivers.

• INTERFACES

• interfaces

  Using an interface to calculate the area of a rectangle and circle.

• interfaces-pointers-arguments

  Using an interface to calculate the area of a rectangle and circle by passing pointers.

• interfaces-pointer-receivers

  Using an interface to calculate the area of a rectangle and circle by passing pointers and using pointer receivers.

• shapes-package

  Using an interface to calculate and manipulate simple 2D and 3D geometric shapes.

GO RUNTIME

• GO ROUTINES

• goroutines-multi-core

  Concurrency across multiples cores. You can play around with workers, threads, cpus/cores and nice to find the fastest performance. It will find the total number of prime numbers within a range.

• goroutines-waitgroup

  Concurrency using a waitgroup (waiting for a collection of goroutines to finish).

• goroutines-worker-pools

  Concurrency using worker pools.

• INTERACT GO RUNTIME

• simple-go-runtime-interactions

  A few go runtime interactions using the runtime package.

• INTERACT HOST OS

• simple-external-commands

  Run a few os commands using the exec package.

• simple-os-interactions

  A few os interactions using the syscall package.

INPUT/OUTPUT

• IO READER

• io-reader

  Read data (a stream of bytes) from a string, buffer, file, stdin and a pipe to a buffer using the standard io package.

• io-reader-simple

  Read data (a stream of bytes) from a buffer to a buffer using the standard io package.

• read-file

  Read a file (*os.File) to a buffer.

• read-user-input

  Read user input (os.Stdin) to a buffer (using Read method) and string (using Fscan).

• IO WRITER

• io-writer

  Write data (a stream of bytes) to a buffer, file, stdout and a pipe from a buffer using the standard io package.

• io-writer-simple

  Write data (a stream of bytes) to a buffer from a buffer using the standard io package.

IN-PROCESS COMMUNICATION

• SHARED MEMORY

• ASYNCHRONOUS

  • Coming soon.

• SYNCHRONOUS

  • pipes-unnamed-simple

  A pipe provides a uni-directional communication channel. This is a very simple example of an unnamed pipe.

  • pipes-unnamed

  This is a more robust example of an unnamed pipe showing multiple reads.

  • pipes-unnamed-io

  This example of an unnamed pipe connects an io.Writer and io.Reader.

• MESSAGE PASSING

• ASYNCHRONOUS

  • channels-buffered

  Buffered channels are uni-directional, asynchronous with no blocking.

• SYNCHRONOUS

  • channels-unbuffered

  Unbuffered channels are uni-directional, synchronous with blocking.

INTER-PROCESS COMMUNICATION (IPC)

• SHARED MEMORY

• ASYNCHRONOUS

  • Coming soon.

• SYNCHRONOUS

  • pipes-named

  Sending data over a named-pipe (FIFO) from one process to another process.

• MESSAGE PASSING

• OPERATING SYSTEM

  • ASYNCHRONOUS

  • message-queues

    tbd.

  • pub-sub-nats-os

    tbd.

  • tcp

    tbd.

  • SYNCHRONOUS

  • grpc-os

    tbd.

• NETWORK

  • ASYNCHRONOUS

  • pub-sub-nats-network

    tbd.

  • tcp-ip

    tbd.

  • SYNCHRONOUS

  • grpc-network

    tbd.

  • rest

    tbd.

IoT

• RASPBERRY PI

• blink-led-raspberry-pi-gpio-periph

  GPIO OUTPUT - Blink an LED via a Raspberry Pi GPIO using the periph.io/... packages.

• push-button-raspberry-pi-gpio-periph

  GPIO INPUT - Push a button via a Raspberry Pi GPIO using the periph.io/... packages.

• [toggle-led-with-button-raspberry-pi-gpio-periph](https://github.com/JeffDeCola/my-go-examples/tree/master/iot/raspberry-pi/toggle-led-with-bu