btedev

const Hooks = { ViewportResizeHooks}

const connectLiveSocket = () => {
  const csrfToken = document.querySelector("meta[name='csrf-token']").getAttribute('content')
  const liveSocket = new LiveSocket('/my_app/live', Socket, {
    params: {
      _csrf_token: csrfToken,
      viewport: {
        width: window.innerWidth,
        height: window.innerHeight

btedev

"Turn off any hacks vim does to be vi backwards-compatible
set nocompatible

"Set Mapleader
let mapleader = ","
let g:mapleader = ","

"Use pathogen to manage plugin bundles
"See http://www.vim.org/scripts/script.php?script_id=2332
filetype off

btedev

create table pantry(name varchar(50), quantity int);

insert into pantry values('soup', 10), ('celery', 5), ('crackers', 2);

create temporary table shopping_list(name varchar(50));

insert into shopping_list values ('soup'), ('onion'), ('celery');

select a.name, ifnull(b.quantity, 0) as quantity
from shopping_list a

btedev

ls *.tar | xargs -i tar xf {}

btedev

  # Hash keyed by y to speed to_s
  def to_h
    hash_with_default = Hash.new {|hash,key| hash[key] = []}
    @points.inject(hash_with_default) { |hash, point| h[point.y] << point.x; hash }
  end

btedev

1. Install lib event from source http://libevent.org/

2. Install tmux from source with:

   .configure LDFLAGS="-L/usr/local/lib"

btedev

SELECT TABLE_NAME, table_rows, data_length, index_length, round(((data_length + index_length) / 1024 / 1024),2) "Size in MB" FROM information_schema.TABLES WHERE table_schema = "my_database_name";

btedev

# One-liner based on an image a friend sent in an email...

(1..9).inject("") { |s,i| s+=i.to_s; puts "#{s.to_i}*8+#{i} = #{s.to_i*8+i}".center(25); s }

btedev

# Disable the MySQL binary log while restoring data from mysqldump

(echo "set session sql_log_bin=0;"; cat some_dump.sql) | mysql ...

btedev

From Tumblr slidedeck "Massively Sharded MySQL" (http://assets.en.oreilly.com/1/event/74/Massively%20Sharded%20MySQL%20at%20Tumblr%20Presentation.pdf):

Our shard-split process relies on creating new slaves quickly, which involves copying around very large data sets.

For compression we use pigz (parallel gzip), but there are other alternatives. 

On destination box:

$ nc -l [port] | pigz -d | tar xvf -