yburyug ybur-yug

Ruby in place of sed / awk

One of Ruby's major influences was Perl, leaving well equipped to replace bash, sed, and awk. Lets take a look at how to do that.

The `-e` flag

If you want a run-down of the 1.3 changes and the design decisions behidn those changes, check out the LonestarElixir Phoenix 1.3 keynote: https://www.youtube.com/watch?v=tMO28ar0lW8

To use the new phx.new project generator, you can install the archive with the following command:

$ mix archive.install https://github.com/phoenixframework/archives/raw/master/phx_new.ez

Bump your phoenix dep

Phoenix v1.3.0 is a backwards compatible release with v1.2.x. To upgrade your existing 1.2.x project, simply bump your phoenix dependency in mix.exs:

System Design Cheatsheet

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

Basic Steps

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?

	Hi S-------. I'm not an expert in performance benchmarking--I focus on
	correctness and safety--but I have a few pieces of advice here.

	0. Pick multiple workloads that cover the gamut of behaviors in each DB.
	Don't choose a completely sharded workload for VoltDB. Don't choose a
	purely commutative workload for Cassandra. Cassandra's Paxos
	implementation is slow and a good benchmark will demonstrate
	that--however, it doesn't (I think?) require a global coordinator,
	which means it might scale better than a single-coordinator system
	like, say, VoltDB. Talk about those differences!

	# video @ https://vimeo.com/217144282
	require 'graphics'

	class Walkers < Graphics::Simulation
	def initialize
	super 800, 600, 24
	color.default_proc = -> h, k { k }
	@walkers = 50.times.map do
	length = 15
	colour = [

	# LVDB - LLOOGG Memory DB
	# Copyriht (C) 2009 Salvatore Sanfilippo <antirez@gmail.com>
	# All Rights Reserved

	# TODO
	# - cron with cleanup of timedout clients, automatic dump
	# - the dump should use array startsearch to write it line by line
	# and may just use gets to read element by element and load the whole state.
	# - 'help','stopserver','saveandstopserver','save','load','reset','keys' commands.
	# - ttl with milliseconds resolution 'ttl a 1000'. Check ttl in dump!

	defmodule MyApp.Scheduler do
	@moduledoc """
	Schedules a Mix task to be run at a given interval in milliseconds.

	## Options

	- `:task`: The name of the Mix task to run.
	- `:args`: A list of arguments to pass to the Mix task's `run/1` function.
	- `:interval`: The time interval in millisconds to rerun the task.

	#!/bin/bash
	set -e

	droplet=netflix
	interface=Wi-Fi
	us_regions=( nyc1 nyc2 nyc3 )

	random_region() {
	echo ${us_regions[RANDOM % ${#us_regions[@]}]}
	}