raganwald

In JavaScript, you can make a right-variadic function by gathering parameters. For example:

const abccc = (a, b, ...c) => {
  console.log(a);
  console.log(b);
  console.log(c);
};

abccc(1, 2, 3, 4, 5)

raganwald

something = if condition
              value-if-truthy
            else
              value-if-falsy

raganwald

const SecretDecoderRing = {
  encode: function (plaintext) {
    return plaintext
      .split('')
      .map( char => char.charCodeAt() )
      .map( code => code + 1 )
      .map( code => String.fromCharCode(code) )
      .join('');
  },
  decode: function (cyphertext) {

raganwald

Reading JavaScript Allongé on Kindle

JavaScript Allongé has over 400 pages and many photographs. For this reason, the .mobi version of the book is too big to be sent to your Kindle via email.

If you wish to read JavaScript Allongé on your Kindle, please:

1. Download it to your PC or Mac.
2. Use Send to Kindle for PC or Send to Kindle for Mac to send it to the Kindle.

raganwald

let Person = (() = > {
  let firstNameProperty = Symbol('firstName'),
      lastNameProperty  = Symbol('lastName'),
      renameMethod      = Symbol('rename');

  return class Person {
    constructor (first, last) {
      this[renameMethod](first, last);
    }
    fullName () {

raganwald

# See https://twitter.com/fogus/status/623312803345117184

def meth a, b, c
  [yield(a), yield(b), yield(c)]
end

meth(1, 2, 3) { |x| x * x }
  # => [1, 4, 9]
  
arr = [1962, 6, 14, lambda { |x| x.to_s }]

raganwald

Many an idea or concept not only looks, but is good in its infancy, yet turns destructive later in life. Scaling and maturation are not the obvious processes they appear to be because they take so much time that the accumulated effort is easy to overlook.

To be successful, they must also be very carefully guided by people who can envision the end result, but that makes it appear to many as if it merely "happens." Take a good idea out of its infancy, let it age without guidance so it does not mature, and it generally goes bad.

—Erik Naggum on XML

raganwald

const evenStevens = (n) => {
  if (n === 0) {
    return true;
  }
  else if (n == 1) {
    return false;
  }
  else {
    n = n - 2;
    return evenStevens(n);

raganwald

Dear soon-to-be-former user,

We've got some fantastic news!  Well, it's great news for us anyway.  You, on 
the other hand, are fucked.

We've just been acquired by:

[ ] Facebook
[ ] Google
[ ] Twitter

raganwald

This CoffeeScript:

name = 'clyde'
do ->
  "Hello #{name}" for name in ['algernon', 'sabine', 'rupert', 'theodora']
name

Complies to this on CoffeeScript under Node:

(function() {