olofwalker

VS Code Plugins and configuration tips

https://code.visualstudio.com/docs/setup/setup-overview

Plugins

• Project manager https://marketplace.visualstudio.com/items?itemName=alefragnani.project-manager
• Scala metals https://marketplace.visualstudio.com/items?itemName=scalameta.metals

vasanthk

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

tsiege

ANNOUNCEMENT

I have moved this over to the Tech Interview Cheat Sheet Repo and has been expanded and even has code challenges you can run and practice against!






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somebody32

Введение

Начать стоит отсюда. Не пугайтесь то, что это книга по незнакомой OS, эти термины практически везде одинаковые и здесь они изложены в понятной для начинающих форме.

http://www.qnx.com/developers/docs/6.4.1/neutrino/getting_started/s1_procs.html

Прочесть нужно треть главы до подраздела "Starting a process", если С не пугает, читайте полностью. После прочтения вы будете понимать, что такое process, thread, mutex, priorites, semaphores, scheduler, contex-switch, kernel states.

Ruby

romanbsd

module ActiveSupport
  class TimeZone
    module Google
      API = 'https://maps.googleapis.com/maps/api/timezone/json'.freeze
      def from_coordinates(lat, lng)
        params = {
          location: "#{lat},#{lng}",
          timestamp: Time.now.to_i,
          sensor: false
        }

danneu

# I'm no benchmark guru. Just did a bunch of:
$ time ruby <filename>

# Note: This is just an 80mb XML file with 38,000 nodes.

ox_dom.rb        4.56s  user 0.78s system 93% cpu 5.714  total (550mb)
ox_dom.rb        4.58s  user 0.79s system 87% cpu 6.126  total (550mb)
ox_dom.rb        4.60s  user 0.80s system 87% cpu 6.140  total (550mb)
nokigiri_dom.rb  11.75s user 1.02s system 94% cpu 13.518 total (895mb)
nokigiri_dom.rb  11.36s user 1.02s system 93% cpu 13.211 total (895mb)

hakanensari

☁  code  ruby sax_parsers.rb
Rehearsal --------------------------------------------
ox         0.800000   0.020000   0.820000 (  0.820952)
nokogiri   2.110000   0.020000   2.130000 (  2.144550)
----------------------------------- total: 2.950000sec

               user     system      total        real
ox         0.790000   0.010000   0.800000 (  0.808858)
nokogiri   2.080000   0.030000   2.110000 (  2.239248)

wycats

class TicketsController < ApplicationController
  def show
    tickets = params[:tickets].split(",")

    ticket_data = tickets.map do |ticket|
      parallel { Faraday.get("http://tickets.local/#{ticket}") }
    end

    render json: { tickets: ticket_data.map(&:result) }
  end

tobiasmcnulty

# ElasticSearch Service

description     "ElasticSearch"

start on (net-device-up
          and local-filesystems
          and runlevel [2345])

stop on runlevel [016]

kapkaev

rails_root = ENV['RAILS_ROOT'] || File.dirname(__FILE__) + '/../..'
rails_env = ENV['RAILS_ENV'] || 'development'

resque_config = YAML.load_file(rails_root + '/config/resque.yml')
Resque.redis = resque_config[rails_env]

#secure the admin view of resque
Resque::Server.use(Rack::Auth::Basic) do |user, password|
    password == "secret"
end