Joseph Rex josephrexme

The introduction to Reactive Programming you've been missing

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

Studying for a Tech Interview Sucks, so Here's a Cheat Sheet to Help

This list is meant to be a both a quick guide and reference for further research into these topics. It's basically a summary of that comp sci course you never took or forgot about, so there's no way it can cover everything in depth. It also will be available as a gist on Github for everyone to edit and add to.

Data Structure Basics

###Array ####Definition:

Stores data elements based on an sequential, most commonly 0 based, index.
Based on tuples from set theory.

	#Model

	@user.should have(1).error_on(:username) # Checks whether there is an error in username
	@user.errors[:username].should include("can't be blank") # check for the error message

	#Rendering
	response.should render_template(:index)

	#Redirecting
	response.should redirect_to(movies_path)

	select generate_series as num,
	case when generate_series % 15 = 0
	then 'fizzbuzz'
	when generate_series % 3 = 0
	then 'fizz'
	when generate_series % 5 = 0
	then 'buzz'
	else '' end
	as fizzbuzz
	from generate_series(1, 100);

	<?php
	namespace App\Models;

	use Illuminate\Database\Eloquent\Model;

	class Category extends Model{
	public function subcategories(){
	return this->hasMany('App\Subcategory')
	}
	}

	var gulp = require('gulp'),
	sass = require('gulp-sass'),
	concat = require('gulp-concat'),
	gutil = require('gulp-util'),
	uglify = require('gulp-uglify'),
	postcss = require('gulp-postcss'),
	nano = require('gulp-cssnano'),
	concatCss = require('gulp-concat-css'),
	autoprefixer = require('autoprefixer'),
	sourcemaps = require('gulp-sourcemaps'),

	<div class="col-md-8 col-md-offset-1">
	<div class="panel panel-default">
	<%= form_for(@weekly_performance_review) do \|f\| %>
	<% if @weekly_performance_review.errors.any? %>
	<div id="error_explanation">
	<h2><%= pluralize(@weekly_performance_review.errors.count, "error") %> prohibited this weekly_performance_review from being saved:</h2>

	<ul>
	<% @weekly_performance_review.errors.full_messages.each do \|message\| %>
	<li><%= message %></li>

	do ($ = jQuery, exports = window) ->

	class ActiveDataBinder
	constructor: (uid) ->

	# Use a jQuery object as simple PubSub

	pubSub = $ {}

	# We expect a 'data' attribute specifying the binding

	[
	{
	"value": "Dateline Standard Time",
	"abbr": "DST",
	"offset": -12,
	"isdst": false,
	"text": "(UTC-12:00) International Date Line West"
	},
	{
	"value": "UTC-11",

	{
	"AF": "Afghanistan",
	"AX": "Åland Islands",
	"AL": "Albania",
	"DZ": "Algeria",
	"AS": "American Samoa",
	"AD": "AndorrA",
	"AO": "Angola",
	"AI": "Anguilla",
	"AQ": "Antarctica",