go-showcase-examples

This is my main site for creating and storing working examples of Go concepts as I learn.

Also see my Tech Site Skills page

how to use

• execute example with Go

  • cd 00100-hello
  • go run main.go

• create executable file

  • Windows
    • cd 00100-hello
    • go build -o hello.exe main.go
    • in Windows terminal, hello
      • also in Git bash: ./hello
  • Mac/Linux and Windows Bash
    • cd 00100-hello
    • go build -o hello main.go
    • in Windows terminal, hello

• run main.go with additional files

  • cd 00210-foriloop
  • go run main.go tools.go

• create executable with multiple files

  • cd 00600-math
  • go build -o shownums main.go tools.go
  • sudo mv shownums /usr/local/bin (for Windows, copy to folder that is included in the environment paths)

• to create example directories

  • cd 00900-cli-crex
  • go build -o crex main.go tools.go
  • copy go to a PATH directory, e.g. sudo mv crex /usr/local/bin
  • in root of this project, crex to get help, or crex 00999-advanced-for-loops

best

• 01310-structMethods - how to attach methods on structs
• 01500-for - various ways to loop through slices
• 01600-api - the simplest API, serves an array of strings
• 01610-api-text-fprintf - simplest webs server, serves a HTML string
• 01620-api-handler - simple API with routes that call functions
• 01700-methods - attaching methods to structs, pseudo OOP in Go
• 01800-functions - basics of functions, e.g. return values, multiple parameters
• 02000-fetch-and-create-files - fetchs an array of items via API and creates a HTML file that displays them
• 02100-url - function that takes a URL and returns info from it, base url, url variables
• 02150-pointers - simple example of pointers
• 02160-errorHandling-structs-pointers - good example of error handling and using pointers instead of values
• 02180-anonymousFunctions - simple example of a function which accepts either an integer or a float
• 02180-higher-order-functions - good example of a useful pattern of a function that accepts a function as a parameter
• 02190-defer - uses defer to postpone closing file until function finishes
• 02200-interfaces - interface to make sure that structs circle and rectangle have the method getArea()
• 02220-empty-interface - example of empty interface which functions as TypeScript's "any"
• 02250-concurrency - simple example of using concurrency to fetch data from 4 API's without having to wait for each one to finish before starting the next
• 02290-web-templates - good example of using EJS-like templates for websites
• 02300-use-custom-module - very useful example of importing gotools from github.com/edwardtanguay/gotools, i.e. using custom libraries in any project
• 02310-pointers - clear example of how to pass either a pointer or a value to a function
• 02315-sqlite-basic-read - simple example of getting data from an sqlite database, you have to load the import (quick fix)
• 02317-sqlite-basic-convert-to-structs - function gets data from sqlite, converts it slice Employees, load import (quick fix)
• 02330-api-mux - CRUD API using Gorilla Mux
• 01630-api-post-route - accepts a flashcard via POST and appends it to a JSON file

online location

https://github.com/edwardtanguay/go-showcase-examples