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Meeting #1 - Intro to Programming & Go

Theory

Intro to go

  • Where go fits in the field of languages the participants know
  • When and for what purpose was it invented What version is current
  • Parallelism vs concurrency Simple gophers example from Rob Pike’s talk
  • Why people like it concurrency, simplicity, mascot
  • What are keywords name some that may be familiar: var, const, if, else
  • Lexical identifiers How to comment No need for semicolons, as some may have seen How to format
  • Some notes on compilers and the go compiler: All programs have to be converted to a form that the computer understands Some languages like Python and Ruby do this as you run the program Other languages like Go require a special step, called compiling
  • The Go Community is awesome GoBridge, Women Who Go, Newsletter, meetups, twitter, confs, slack
  • Sign up to gophers slack and make sure everyone are in the dedicated channel

Practice at the playground

Variables

  • Basic types: String, int, float, bool, slices (glimpse, saying we’ll focus later)
  • Zero values
  • Different declaration formats
  • Constants

Functions

  • Signature meaning
  • Caller
  • Name (repeat naming conventions)
  • Return values (go has multiple, not all languages have that)
  • Call a function in main

Homework

For this homework guide the class to edit the playground exercises, as imports are introduced in class #3, but imports are already used now. If they ask - explain shortly, say this will be introduced later and encourage independent reading at home. 4 functions for the 4 mathematical operation Func that receives name, and prints a message+name Fun that receives your age and name, and prints “ you were born in ”

Meeting #2 - Go basics

Practice in playground

Loops

  • For Standard While Infinite
  • If-else
  • Switch Standard Break Fallthrough Single case with several options No condition
  • Defer Defers are called as FILO
  • Pointers Value type (point to value in memory) vs. reference type (contains the address of the val) Slices and arrays

Do some exercises with fun visual libs like strings, math, fmt

Homework

Guessing game: func that gets number of guesses for the current round, chooses a random number, and for times, the user attempts to guess the random number, and the game prints yes/no Func that gets an operator and 2 numbers, and prints the result of the operation on the two numbers Func that gets 5 numbers and prints their average (basically implement average)

Meeting #3 - First full program

Environment setup

  • Installing and setting Gopath For reference you can use Bill’s post
  • IDE
  • Github account

Practice locally

Packages

  • Naming conventions for params and functions
  • Program structure Why should there be one Standard: main, helper functions
  • Folder/directory is a package This is where helper functions go
  • Exports (private/public)
  • Import

Exercise: Write a hello world

Testing

  • Importance of testing
  • How to do test driven development
  • Testing the math funcs we did so far

Homework

  • Implement the exercises from hw#1 and hw#2 locally
  • Use one of the hash libs, for example md5, and see how your name/address/etc look like when they are hashed

Meeting #4 - Making a web server

Here we’re starting to follow the online tutorial

Theory

###Localhost

  • Localhost
  • Overview how websites are hosted and served
  • Localhost vs. online website

What is web client/server

  • Package net/http
  • What is web client/server
  • What is http handler
  • Encoding, decoding, escaping

API Server

  • What is an API?
  • Demo some fun APIs like Google Vision, IBM Watson, Microsoft Cognitive Services

Practice locally

Localhost

  • Write a local hello world
  • Adding routes e.g. “/name” prints “hi ”

API Server

  • Sign up to the weather API service and understand their response format
  • Read and plan struct that will match the API response

Homework

  • Func that gets string as input and prints the encoding of it, decodes back and prints that. Try those on different urls, especially values like wikipedia values in foreign languages
  • Add more routes locally

#Meeting #5 - Weather API consumption

Theory

API Server

  • Maps
  • Struct Slow down here, explain slow and in detail, and include an example exercise in class (in addition to the homework)
  • Methods
  • Interfaces

Web services

  • JSON
  • Decoding the request
  • Responding
  • Field tags (json:”name”)
  • Marshaling and unmarshaling How the body from the request is filled in the struct

Practice locally

API Server

  • Build response struct
  • Query the weather API
  • Unmarshal json
  • Convert Kelvin -> celsius/fahrenheit
  • Display response

Homework

  • See what happens when you add to the struct fields that are not in the API
  • Define a struct to define a person, populate it, marshal and print the values, unmarshal and print the values

Meeting #6 - Graduation event

Going online

  • First hour for last questions and fixes
  • Upload the code to github
  • Demo to classmates
  • Consider bringing a motivation speaker
  • Introduce further GoBridge material
  • Suggest attending meetups
  • Remind to keep using slack