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# Expressions
iex> 40 + 2
iex> "hello" <> " world"

#Basic types
iex> 1          # integer
iex> 0x1F       # integer
iex> 1.0        # float
iex> :atom      # atom / symbol
iex> "elixir"   # string

cheeyeo

# You can wire up a cowboy specific websocket handler with the following:

defmodule MyRouter do
  use Phoenix.Router

  dispatch_option "/ws", MyCowboyWebsocketHandler
end

defmodule MyCowboyWebsocketHandler do
  @behaviour :cowboy_websocket_handler

cheeyeo

class Hash
  # Returns a new hash with the results of running +block+ once for every value.
  # The keys are unchanged.
  #
  #   { a: 1, b: 2, c: 3 }.transform_values { |x| x * 2 }
  #   # => { a: 2, b: 4, c: 6 }
  def transform_values
    result = self.class.new
    each do |key, value|
      result[key] = yield(value)

cheeyeo

https://developers.google.com/web/fundamentals/performance/

http://chimera.labs.oreilly.com/books/1230000000545/ch11.html#RESOURCE_INLINING

cheeyeo

Steps to render a page:

• browser reads html text as it's received and the tokeniser converts elements into tokens.
• tokens are parsed to create DOM nodes
• this process is incremental, meaning that the browser can start creating the DOM before it's received all of the html document.

once all of the css has been received, the css text is tokenised, and then these tokens converted into css object nodes, creating the CSSOM (CSS Object Model). unlike html, because later css can affect that defined earlier, css can't begin to be parsed until all of it is available. Thus css downloading blocks rendering Once the DOM and CSSOM are available, the browser puts them together to create the render tree.

• the render tree only describes visible content.
• the render tree enables the browser to calculate where elements should sit on the page, ie the layout

cheeyeo

package main

import (
	"fmt"
	"log"
	"net/http"
	"time"
)

// Example SSE server in Golang.

cheeyeo

require 'fog'

username = 'testuser'
bucket = 'uniquebucketname1234'

aws_credentials = { 
  :aws_access_key_id => 'YOUR-ACCESS-KEY-ID',   
  :aws_secret_access_key => 'YOUR-SECRET-ACCESS-KEY'
}

cheeyeo

class Quantity
  include Comparable

  CoercedNumber = Struct.new(:value) do
    def +(other) raise TypeError; end
    def -(other) raise TypeError; end
    def *(other)
      other * value
    end
    def /(other) raise TypeError; end

cheeyeo

package main

import (
	"fmt"
	"log"
	"net/http"
	"time"
)

// Example SSE server in Golang.

cheeyeo

shared_examples "collections" do
  it "is empty when first created" do
    expect(described_class.new).to be_empty
  end
end

describe Array do
  include_examples "collections", Array
end