luislee818

var myClosure = function() {
  var secret = 42, getSecret, inc;
  
  getSecret = function() { return secret; };
  
  inc = function() { secret += 1; };
  
  return {
    getSecret: getSecret,
    inc: inc

luislee818

// 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]);

luislee818

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() {

luislee818

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));

luislee818

// Dependencies
// _

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

luislee818

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) {

luislee818

defmodule Funcs do
  def greet(name) do
    "Hola #{name}"
  end

  def test do
    # functions as target of pipe
    IO.puts test_1()
    IO.puts test_2()
    IO.puts test_3()

luislee818

// using v0.24.1
const R = require('ramda');

// adjust
// [a -> a] -> Number -> [a] -> [a]
const arr = [1, 2, 3];
let result = R.adjust(R.add(1), 1, arr);
console.log('adjust: ', result);  // [1, 3, 3]

// update

luislee818

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

luislee818

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/"