Mike Kelly mikekelly

!SLIDE

Hypermedia APIs

"Follow your nose"

— Roy T. Fielding

!SLIDE

"build scalable, flexible implementations that do not simply run on the Web, but that actually exist in the Web"

Inheritance is a key concept in most object-oriented languages, but applying it skillfully can be challenging in practice. Back in 1989, M. Sakkinen wrote a paper called Disciplined inheritance that addresses these problems and offers some useful criteria for working around them. Despite being more than two decades old, this paper is extremely relevant to the modern Ruby programmer.

Sakkinen's central point seems to be that most traditional uses of inheritance lead to poor encapsulation, bloated object contracts, and accidental namespace collisions. He provides two patterns for disciplined inheritance and suggests that by normalizing the way that we model things, we can apply these two patterns to a very wide range of scenarios. He goes on to show that code that conforms to these design rules can easily be modeled as ordinary object composition, exposing a solid alternative to tradi

	-module(compress_ecdsa_publickey).
	-export([compress_ecdsa_publickey/1, test/0]).

	compress_ecdsa_publickey(UncompressedPublicKey) ->
	%% To binary
	UncompressedPublicKeyBin = binary:decode_hex(list_to_binary(UncompressedPublicKey)),
	%% Check that the uncompressed public key is valid
	case size(UncompressedPublicKeyBin) of
	65 ->
	%% Remove the prefix (first byte) from the public key

	const ethers = require("ethers")

	const pk =
	"0x0471c746523d16e93d4738f882d9b0beebf66c68caa0f895db15686b57b878cfc7b3e09813ba94f1bbfaa91a06566d3d18bbf69d10bcc947325bbcd6fea97ed692"
	const ad = "0xcD3edF915387E2555A829567cE0dBbC919834B82"

	getPubKey = async () => {
	const infuraProvider = new ethers.providers.JsonRpcProvider(
	"https://ropsten.infura.io/v3/<projectID>"
	)

	---- TidalCycles QUICK REFERENCE ----
	----------------------------------------------------------------
	-- To use in your editor after or alongside your code for quick reference
	-- Work in progress, mostly to be used as basis for further documnentation work, sorry for the errors and omissions
	-- designed with atom - monokai one dark vivid as theme
	-- https://gist.github.com/mxactvtd/bf3fb357a419c7f063b98dfd9a66cf78 - check for update, I keep updating this quite often atm
	----------------------------------------------------------------
	-- Some sources of Documentation --
	-- https://tidalcycles.org/patterns.html
	-- https://tidalcycles.org/functions.html

	{
	"self": {"href":"/orders"},
	"rel-templates":[
	{
	"name":"ea",
	"href":"http://example.com/docs/rels/{rel}",
	"templated":true
	}
	],
	"next":{"href": "/orders?page=2"},

	def assigns_local(key)
	controller.instance_variable_get('@patched_locals')[key]
	end

	def patch_controller_render_to_support_locals(controller)
	def controller.render(options = nil, extra_options = {}, &block)
	[options, extra_options].select { \|o\| o.kind_of?(Hash) }.each do \|option_hash\|
	if option_hash.include?(:locals)
	@patched_locals = option_hash[:locals]
	end

	// http://chaijs.com/guide/plugins/
	module.exports = function(chai, utils){
	var Assertion = chai.Assertion
	, assert = chai.assert

	Assertion.addProperty('resource', function(){
	var doc = this._obj
	, message = utils.flag(this, 'message')

	new Assertion(doc, message).to.be.an('object')

	class Organization
	def to_param
	"42"
	end
	def saved?
	rand > 0.5
	end
	end

	=Navigating=
	visit('/projects')
	visit(post_comments_path(post))

	=Clicking links and buttons=
	click_link('id-of-link')
	click_link('Link Text')
	click_button('Save')
	click('Link Text') # Click either a link or a button
	click('Button Value')