vaz vaz

Intro to HTTP

Here are the lecture notes from May 16, 2016: Intro to HTTP

HTTP is Hyper-Text Transfer Protocol.

2016-05-18 breakout by Vaz

This breakout covered:

Using RACK_ENV in the conventional way to use a different db for development than for tests
Adding RSpec to the skeleton with a (very) basic model spec
Introduction to acceptance testing and Capybara, focusing on form submission for creating new records

	> // There are two different ways to define functions in javascript.
	> // Functions can be named, or anonymous.
	> // The named function syntax looks more like a C- or Java-style "statement":
	> function f(){ }
	undefined
	> // Notice it evaluates to "undefined". I'll come back to this in a sec.
	> // The named function syntax binds the function to a local variable with the given name.
	> f
	[Function: f]
	> // It also actually names the function object:

	#include <iostream>
	#include <cstdlib>
	#include <ctime>
	#include <cmath>

	using namespace std;


	typedef void (*sorting_fun)(int[], int);


	// the self-calling function is a
	// Javascript "module" pattern for
	// not leaking stuff into global scope:
	(function(){
	// simple closure example

	function loglater(message){
	return function logger(){
	console.log(message); // references outer function's argument


	# find primes up to n
	def sieve(n)
	return n if n == 2
	s = (3..n).step(2).to_a
	s.each { \|i\| s.reject! { \|j\| j != i && j % i == 0 } }
	end

	def new_sieve(n)
	(s = maybe_primes(n)).each { \|i\| s.reject! { \|j\| j != i && j % i == 0 } }

	// ----
	// Sass (v3.4.12)
	// Compass (v1.0.3)
	// ----

	// RANGES
	// We use these functions to define ranges for various things, like media queries.
	@function lower-bound($range){
	@if length($range) <= 0 {
	@return 0;

	showAllFiles ()
	{
	local new old=`defaults read com.apple.finder AppleShowAllFiles`;
	if [ "$old" = "TRUE" ]; then
	new="FALSE";
	else
	new="TRUE";
	fi;
	defaults write com.apple.finder AppleShowAllFiles $new;
	echo -n "com.apple.finder AppleShowAllFiles = ";

	$ bash test.sh
	This is what happens now. Simple Gemfile:
	source 'https://rubygems.org'
	gem 'listen'

	Updating bundle...
	Fetching gem metadata from https://rubygems.org/............
	Fetching version metadata from https://rubygems.org/...
	Fetching dependency metadata from https://rubygems.org/..
	Resolving dependencies...

	# basic sinatra app showing some use of sessions to handle
	# some (insecure) authentication

	require 'sinatra'

	# enable default sessions support
	# sessions are "like hashes" and get serialized (stringified) and
	# stored directly in a session cookie.
	# Sinatra (actually a Rack sessions extension) handles this for you
	enable :sessions