Justin Meiners justinmeiners

This Software Looks pretty good. Simple command line tool.

Security

Technology is never the root of system security. Technology is a tool to help people secure what they value. Security requires people to act.

The way to beat the $5 wrench attack is to bear arms. Either your own, or employ guards, or use a safety deposit box, or rely on the police forces and army; or whatever may be appropriate and proportionate in your situation. If someone physically overpowers you then no technology on Earth can save your bitcoins.

Learn You a Haskell Notes

Learn You a Haskell For Great Good

I tried going through this book a few times when I was younger, but lacked the mathematical knowledge to understand a lot of what was going on. Now the functional ideas and type system are a breeze but lazinesss is still very new and mysterious.

Haskell Overview

Referential transparency: if a function is called multiple times with the same inputs, it will produce the same outputs.

	// notice that downloader doesn't need to import user interface

	class Downloader {

	// delegate has startDownload and finishDownload
	constructor(delegate) {
	this.delegate = delegate;
	}

	downloadFile() {

	// how to write a struct to a buffer.

	typedef struct {
	int version;
	int count;
	char id[8];
	} FileInfo;

	FileInfo info;

	# Created By: Justin Meiners (2017)
	# simple calculations
	# -------------------------------

	import math

	def volume_cone(radius, height):
	volume = math.pi * (radius*2.0) (height / 3.0)
	return volume

	// Created By: Justin Meiners (2018)
	pragma solidity ^0.4.24;

	// https://en.wikipedia.org/wiki/Dutch_auction

	contract DutchAuction {
	uint public askingPrice;
	address public auctioneer;
	address public winner;
	address public seller;

	; ParenScript experiment
	; https://common-lisp.net/project/parenscript/reference.html
	; https://gitlab.common-lisp.net/parenscript/parenscript

	; typical functions
	(defun fib (n)
	(cond ((= n 0) 0)
	((= n 1) 1)
	(t (+ (fib (- n 1)) (fib (- n 2))))))

Justin Meiners justinmeiners

Security

Learn You a Haskell Notes

Haskell Overview

PS3