jasonbellamy

const xs = [1, 2, 3, 4, 5];

const x = xs.pop(); //=> 5

jasonbellamy

const xs = [1, 2, 3, 4, 5];

const x = xs[xs.length - 1]; //=> 5

jasonbellamy

const xs = [1, 2, 3, 4, 5];

const [ x ] = xs.slice(-1); //=> 5

jasonbellamy

const generator = (x, y = x) => {
  return {x: `_${x}`, y};
};

jasonbellamy

var xs = { 
  template: [
    {template: 'one', dest: 'two'},
    {template: 'one', dest: 'two'}
  ],
  copy: [
    {template: 'one', dest: 'two'},
    {template: 'one', dest: 'two'}
  ]
};

jasonbellamy

function functionFactory({ type, ...rest }) {
  switch(type) {
    case 'hi':
      return hello(rest);
    case 'bye':
      return goodbye(rest);
  }
};

function hello({ name }) {

jasonbellamy

shh reduce 
such reduce much fn xs accum index
  rly index === xs.length -1
    wow accum 
  wow reduce(fn, xs, fn(accum, xs[index + 1]), index + 1)
  

shh map
such map much fn xs
  such _map much previous current

jasonbellamy

var stateManger = function () {
  var active   = false;
  var setState = function(state) {
    active = state;
  };

  return {
    toggle      : setState.bind(this, !active),
    setActive   : setState.bind(this, true),
    setInactive : setState.bind(this, false)

jasonbellamy

var stateManger = function () {
  var active   = false;
  var setState = function(state) {
    active = state;
  };

  return {
    toggle: function () {
      return setState(!active);
    },

jasonbellamy

var sum = function () {
  var result = 0;
  var args = Array.prototype.slice.call(arguments); // convert arguments into array
  
  args.forEach(function(number) {
    result = result + number;
  });
  
  return result;
};