Homayoon Hedayatifard hmnhf

Read this first!

Hi there! Since this post was originally written, nvm has gained some new tools, and some people have suggested alternative (and potentially better) approaches for modern systems. Make sure to have a look at the comments to this article, before following this guide!

The original article

Trickier than it seems.

Testing notes

Uncle Bob: Test First

Source: http://blog.8thlight.com/uncle-bob/2013/09/23/Test-first.html

tests are specs for the system and are more important than the system itself
(Tests should be) short, well factored, and well named. They ought to read like specifications; because they are specifications
(Goal:) trust your test suite to the extent that, if it passes, you know you

YARD CHEATSHEET http://yardoc.org

May 2020 - updated fork: https://gist.github.com/phansch/db18a595d2f5f1ef16646af72fe1fb0e

cribbed from http://pastebin.com/xgzeAmBn

Templates to remind you of the options and formatting for the different types of objects you might want to document using YARD.

	#!/usr/bin/env ruby

	require 'redis'

	# Clear a large number of keys matching a pattern using SCAN and
	# pipelining to avoid killing the server.
	class ClearKeys
	def initialize(pattern, host='localhost', postprocess_pattern=nil)
	@redis = Redis.new(host: host)
	@pattern = pattern

	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