Dapeng Li luislee818

I hereby claim:

To claim this, I am signing this object:

	import Text.Printf
	import System.Process

	-- Downloads free PragPub issues from 2009.07 to 2013.07 from https://pragprog.com/magazines
	-- relies on 'wget' command for downloading
	-- run `processAll` to download

	-- constants
	savePath = "/Users/Dapeng/Downloads/PragPub/"

	---
	version: '2'
	services:
	zk1:
	image: confluentinc/cp-zookeeper:3.0.1
	ports:
	- "22181:22181"
	environment:
	ZOOKEEPER_SERVER_ID: 1
	ZOOKEEPER_CLIENT_PORT: 22181

	var R = require('ramda');
	var log = console.log;

	var Maybe = function(val) {
	this.__val = val;
	}

	Maybe.of = (val) => new Maybe(val);

	Maybe.prototype.map = function(fn) {

	// Dependencies
	// _

	// Some helper functions to be used in composition, inspired by Ramda
	window.r = (function(_) {
	var curry,
	flip2,
	invoke,
	split,
	map,

	const Y = (f) => {
	const something = x => f(v => x(x)(v));
	// const something = x => f(x(x)); // actually it's this, but will cause stask overflow

	return something(something);
	};

	const factorial = Y(function f(fac) {
	return function almost(n) {
	return (n == 0 ? 1 : n * fac(n - 1));

	Promise.resolve().then(function() {
	console.log('starting');
	return 123;
	}).then(function(val) {
	console.log(val);
	return val + 1;
	}).then(function(val) {
	console.log('starting second step...');
	return new Promise(function(resolve) {
	setTimeout(function() {

	// Chap 1
	function splat(fun) {
	return function(array) {
	return fun.apply(null, array);
	};
	}

	var addArrayElements = splat(function(x, y) { return x + y });

	addArrayElements([1, 2]);