Tristan parasquid

To Design or Not To Design? A Third Good Question

Following my earlier discussions of testing and defect fixing, I’ll complete the trilogy by discussing the role of design early in projects. Recall the context: projects that have validated a genuine need by haven’t validated an economic proposition. Because of the uncertainties of such a situation, iteration is inevitable. Piloting a project on the runway you will like have to try many experiments to find value customers will buy. Capital efficiency while iterating extends the lifespan of the project and increases its chances of success. The more experiments you can perform per dollar, the higher your expected return.

Review

In the sibling essays to this one I argued that the Extreme Programming principles of Test Until Bored and Defects Zero were perfectly appropriate to the cruise phase of a product, where the business driver is increasing profit by lowering cost. These principles also serve to prepare the software to act as a platform from which to

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1. Voting

Each voter can vote in zero or more referenda. Each referendum has one or more questions, and each question is a yes/no vote. Write the simplest normalized schema to describe this in generic SQL statements or as an entity-relationship diagram. Point out where the indexes would be if you want to quickly know the results of a given referendum question, but you never expect to query a single voter's voting record.

2. Availability on AWS

Your client plans to host their web application on AWS. When would you advise (a) deployment in a single availability zone, (b) deployment in multiple availability zones in a single region (c) deployment in multiple regions? What operational difficulty or complexity, if any, is added as you go from (a) to (b) to (c)?

How to install OSX 10.11 El Capitan on VMWare

To accomplish this tutorial you already need a previous copy of OSX installed on VMWare Player or Workstation.

0) Acquire a copy of OSX 10.11 El Capitan

First of all you need to acquire a legal copy of OSX El Capitan from the App Store. This tutorial will not cover this part. Sorry :)

1) Unlock OSX option on VMWare

Download the latest version of VMWare Unlocker and use the relative binary to unlock it ( based on your Host OS ).

Install
Shell exports
Directory explanations
Automatic Imports
Private repo access
Guard (automatic go run)
Godo
Spurious
AWS SDK with Go (inc. some old possibly broken examples)
Build and Compilation

	#!/usr/bin/env ruby

	# Dump firmware from nrf51 and maybe other cortex-m devices
	# The script thats missing from http://blog.includesecurity.com/2015/11/NordicSemi-ARM-SoC-Firmware-dumping-technique.html
	# Also inspired by https://tasteless.eu/post/2015/12/32c3ctf-emb400/
	# Requires seperate instace gdb server already running, for my jlink I use
	# openocd -f interface/jlink.cfg -c "adapter_khz 2000; transport select swd;" -f target/nrf51.cfg

	# uicr and ficr are always accessible so you might want to dump those externally and compare?
	# openocd -f interface/jlink.cfg -c "adapter_khz 2000; transport select swd; set WORKAREASIZE 0;" -f target/nrf51.cfg -c "init; reset halt; flash read_bank 1 uicr-normal.bin 0x0 0x100; exit"

	#!/bin/bash
	#
	# Credits to fuckbecauseican5 from https://www.reddit.com/r/hackintosh/comments/4s561a/macos_sierra_16a238m_install_success_and_guide/
	# Adapted to work with the official image available into Mac App Store
	#
	# Enjoy!

	hdiutil attach /Applications/Install\ macOS\ Sierra.app/Contents/SharedSupport/InstallESD.dmg -noverify -nobrowse -mountpoint /Volumes/install_app
	hdiutil create -o /tmp/Sierra.cdr -size 7316m -layout SPUD -fs HFS+J
	hdiutil attach /tmp/Sierra.cdr.dmg -noverify -nobrowse -mountpoint /Volumes/install_build

	/*
	After purchasing a humble book bundle, go to your download page for that bundle.
	Open a console window for the page and paste in the below javascript.
	This will download all the books in all the formats available.
	*/
	$('a').each(function(i){
	if (['MOBI', 'PDF', 'EPUB'].indexOf($.trim($(this).text())) >= 0) {
	$('body').append('<iframe id="dl_iframe_'+i+'" style="display:none;">');
	document.getElementById('dl_iframe_'+i).src = $(this).data('web');
	}

	# speed up pluck

	class ActiveRecord::Relation

	class RailsDateTimeDecoder < PG::SimpleDecoder
	def decode(string, tuple=nil, field=nil)
	if Rails.version >= "4.2.0"
	@caster \|\|= ActiveRecord::Type::DateTime.new
	@caster.type_cast_from_database(string)
	else

	#!/bin/bash
	PATH=/usr/local/sbin:/usr/sbin:/sbin:/usr/local/bin:/usr/bin:/bin

	## Usage (after configuration):
	## 1. Insert camera's memory card into a USB port on your unRAID system
	## 2. The system will automatically move (or copy) any images/videos from the memory card to the array
	## If jhead was installed, it will automatically rotate images according to the exif data
	## 3. Wait for the imperial theme to play, then remove the memory card

	## Preparation:

	qemu-img convert -O vdi gnome.qcow2 gnome.vdi


	#if its a raw image then:
	VBoxManage convertdd opnstk.raw VBox.vdi --format VDI