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Applied Functional Programming with Scala - Notes

1. Mastering Functions

A function is a mapping from one set, called a domain, to another set, called the codomain. A function associates every element in the domain with exactly one element in the codomain. In Scala, both domain and codomain are types.

val square : Int => Int = x => x * x

	/**
	* Connect and fetch Salesforce data via OAuth
	*/
	function queryDataFromSalesforce() {
	// Read OAuth consumer key / secret of this client app from script properties,
	// which can be issued from Salesforce's remote access setting in advance.
	var sfConsumerKey = ScriptProperties.getProperty("sfConsumerKey");
	var sfConsumerSecret = ScriptProperties.getProperty("sfConsumerSecret");
	if (!sfConsumerKey \|\| !sfConsumerSecret) {
	Browser.msgBox("Register Salesforce OAuth Consumer Key and Secret in Script Properties");

	<!doctype html>
	<html>
	<head></head>
	<body>

	<!--
	Obviously this is not production code. Really I was just rendering a map so I could take a screenshot and post it on Twitter,
	and this was faster than using some Python mapping library (and looks way nicer!). So no judgement, mkay?

	This plots points taken from my Google Location data, formatted using this handy Python script:

	public class DependentPicklistDemoController {

	@AuraEnabled
	public static List<Contact> getContacts() {
	return [
	SELECT Id, Name, AccountId, Account.Name
	FROM Contact
	LIMIT 200
	];
	}

	import akka.actor.ActorSystem
	import akka.http.Http
	import akka.stream.FlowMaterializer
	import akka.http.model._
	import akka.stream.scaladsl._
	import akka.stream.scaladsl.Source
	import akka.stream.scaladsl.FlowGraphImplicits._
	import scala.concurrent.ExecutionContext.Implicits.global
	import scala.concurrent.Future

	// -----------------------------------------
	// CREATE CONTACTS FROM GOOGLE SHEET
	// -----------------------------------------

	// Name of the entry in the Documents entity.
	String dataFile = 'DemoExport';

	// -----------------------------------------
	// Get the URL from Documents and retrieve from Google Sheets as TSV.

	var setup = {
	// Add your keys
	consumerKey: "XXXXXXXXXXXXXXXXXXXXXXXXXXXX",
	consumerSecret: "XXXXXXXXXXXXXX"
	};

	function onOpen(e) {
	var menu = SpreadsheetApp.getUi().createAddonMenu();
	menu.addItem('Login to SF', 'menuAuth');
	menu.addItem('Update all reports', 'updateTrigger');

	from bs4 import BeautifulSoup
	import requests
	import re
	import urllib2
	import os
	import argparse
	import sys
	import json

	# adapted from http://stackoverflow.com/questions/20716842/python-download-images-from-google-image-search

	/*
	Copyright 2011 Mavens Consulting, Inc.

	Licensed under the Apache License, Version 2.0 (the "License");
	you may not use this file except in compliance with the License.
	You may obtain a copy of the License at

	http://www.apache.org/licenses/LICENSE-2.0

	Unless required by applicable law or agreed to in writing, software