EdwardDiehl

Code is clean if it can be understood easily – by everyone on the team. Clean code can be read and enhanced by a developer other than its original author. With understandability comes readability, changeability, extensibility and maintainability.

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General rules

1. Follow standard conventions.
2. Keep it simple stupid. Simpler is always better. Reduce complexity as much as possible.
3. Boy scout rule. Leave the campground cleaner than you found it.
4. Always find root cause. Always look for the root cause of a problem.

Design rules

EdwardDiehl

/**
 * GlobalsDebugger
 *
 * Inspect the stack when a global variable is being set on the window object.
 * Given a global variable name, it proxies the variable name in the window
 * object adding some custom code that will be invoked whenever the variable
 * is set. The custom code will log the current stack trace and halt the code
 * execution to allow inspecting the stack and context in your browser DevTools.
 * You can use the "globalsToInspect" query-parameter to set a comma-separated
 * list of names of the variables you want to inspect.

EdwardDiehl

Про токены, JSON Web Tokens (JWT), аутентификацию и авторизацию. Token-Based Authentication

Last major update: 25.08.2020

• Что такое авторизация/аутентификация
• Где хранить токены
• Как ставить куки ?
• Процесс логина
• Процесс рефреш токенов
• Кража токенов/Механизм контроля токенов

EdwardDiehl

Go to Bitbucket and create a new repository (its better to have an empty repo)
    git clone git@bitbucket.org:abc/myforkedrepo.git
    cd myforkedrepo

Now add Github repo as a new remote in Bitbucket called "sync"
    git remote add sync git@github.com:def/originalrepo.git

Verify what are the remotes currently being setup for "myforkedrepo". This following command should show "fetch" and "push" for two remotes i.e. "origin" and "sync"
    git remote -v

EdwardDiehl

module SimpleRailway
  class Result
    attr_accessor :success, :data
    def initialize(success, data)
      @success = success
      @data = data
    end

    def success?; !!success; end
    def failure?; !success?; end

EdwardDiehl

# Usage:
#
# class Mail
#   include SimpleStateMachine
#
#   self.initial_state = 'unread'
#   self.transitions_map = {
#     read:   {from: 'unread', to: 'read'},
#     unread: {from: 'any',   to: 'unread'},
#     delete: {from: 'any',   to: 'deleted'},

EdwardDiehl

Teh Social Netswork!

CREATE TABLE users (
 id SERIAL PRIMARY KEY,
 name VARCHAR(10) NOT NULL
);

INSERT into users VALUES

EdwardDiehl

# Related blog post: https://iprog.com/posting/2017/10/benchmarking-geoip-gems

require 'benchmark'

PASS = 1  #  1 or 2

### libraries for C extensions
# brew install geoip
# brew install libmaxminddb

EdwardDiehl

parentheses:     ( ) 
braces:          { } 
brackets:        < > 
square-brackets: [ ]

EdwardDiehl

Ruby: Blocks, Procs, Lambdas

Note that for blocks, {} and do ... end are interchangeable. For brevity, only the former will be listed here.

Version differences

Pre-1.9, lambda and proc are synonyms. Essentially the difference is between proc and block.

def method(&block) p block.class; p block.inspect; end
l = lambda { 5 }