holyketzer

tmux cheat sheet

(C-x means ctrl+x, M-x means alt+x)

Prefix key

The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf:

remap prefix to Control + a

holyketzer

Spree::CheckoutController.class_eval do
  def update_with_marketplace_sync    
    if @order.completed?
      # Тут используешь @order или @current_order пока он ещё не обнулён и всё другое
    end

    update_without_marketplace_sync
  end

  alias_method_chain :update, :marketplace_sync

holyketzer

#!/bin/sh

HOST='api.*****.com'
USER='customer@mail.com'
PASSWORD='password'

CLIENT_ID='web'

ACCESS_TOKEN=$(curl -s -X POST --data "grant_type=password&username=$USER&password=$PASSWORD" http://$HOST/api/oauth/token | jq -r '.access_token')
echo "Access Token: $ACCESS_TOKEN"

holyketzer

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

holyketzer

Commands examples

If the namespace is not used then the commands will perform on top of the default database. bundle exec rake db:create bundle exec rake db:migrate

By using the namespace we are going to use all the configuration for our alternate DB. bundle exec rake store:db:create bundle exec rake store:db:migrate